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CRM CLI (command line interface) tool
======================================
Dejan_Muhamedagic,_Yan_Gao dejan@suse.de,ygao@novell.com
v0.91, July 2, 2009:
The CRM (a.k.a Pacemaker) is a Cluster Resource Manager which
implements the cluster configuration provided by the user in CIB
(Cluster Information Base). The CIB is a set of instructions
coded in XML. Editing the CIB is a challenge, not only due to its
complexity and a wide variety of options, but also because XML is
more computer than user friendly.
.Note
**************************
I do understand that there are people capable of
dealing with XML without an intermediary.
**************************
There are currently three options to manage the CIB, listed here
in a decreasing order of user-friendliness:
- the GUI (`hb_gui`)
- a set of command line tools
- `cibadmin(8)`
The GUI is very popular and it has recently seen a lot of good
development. For some it is going to be (or remain) the first
choice in cluster management.
The command line tools, lead by `crm_resource(8)`, are capable of
performing almost any kind of CIB transformation. The usage is,
however, plagued by the notorious weakness common to all UNIX
tools: a multitude of options, necessary for operation and yet
very hard to remember. Usage is also inconsistent at times.
The `cibadmin` is the ultimate CIB management tool: it applies
chunks of XML written by the user or generated by another tool to
the CIB. Very difficult to use without extensive training. Or
should I say drill. May be unnerving as well, in particular due
to sometimes cryptic error messages.
== Design goals
The CLI provides a consistent and unified interface to
CIB/cluster management. It uses the command line tools where
possible and may resort to XML and `cibadmin` when there is no
other option. That is the easiest way to ensure compatibility
between different management tools.
It may be used either as an interactive shell or for single
commands directly on the shell's command line. It is also
possible to feed it a set of commands from standard input or a
file, thus turning it into a scripting tool. Templates with ready
made configurations may help people to learn about the cluster
configuration or facilitate testing procedures.
The CLI may also be used for the CIB description and generation.
A file containing a set of CLI instructions may be applied to the
CLI tool to generate a complete CIB.
The new shadow CIB feature may also be put to use. The user may
work on one of the shadow CIBs and then apply (or commit) it in a
single step to the cluster.
It should also allow deployment of raw XML which may come either
from files or network.
Several modes of operation are available to restrict the set of
features depending on the user's proficiency.
The CLI is line oriented: every command must start and finish
on the same line. It is possible to use a continuation character
(`\`) to write one command in two or more lines.
The CLI has to be run on one of the cluster nodes.
.Note
**************************
Even though all sensible configurations (and most of those that
are not) are going to be supported by the CLI, I suspect that it
may still happen that certain XML constructs may confuse the
tool. When that happens, please file a bug report.
The CLI will not try to update the objects it does not
understand. Of course, it is always possible to edit such objects
in the XML format.
**************************
== Introduction to the user interface
Arguably the most important aspect of such a program is the user
interface. We begin with an informal introduction so that the
reader may get acquainted with it and get a general feeling of
the tool. It is probably best just to give some examples:
1. Command line (one-shot) use:
# crm resource stop www_app
2. Interactive use:
# crm
crm(live)# resource
crm(live) resource# unmanage tetris_1
crm(live) resource# up
crm(live)# node standby node4
3. Cluster configuration:
# crm<<EOF
configure
erase
#
# resources
#
primitive disk0 iscsi \
params portal=192.168.2.108:3260 target=iqn.2008-07.com.suse:disk0
primitive fs0 Filesystem \
params device=/dev/disk/by-label/disk0 directory=/disk0 fstype=ext3
primitive internal_ip IPaddr params ip=192.168.1.101
primitive apache apache \
params configfile=/disk0/etc/apache2/site0.conf
primitive apcfence stonith:apcsmart \
params ttydev=/dev/ttyS0 hostlist="node1 node2" \
op start timeout=60s
primitive pingd pingd \
params name=pingd dampen=5s multiplier=100 host_list="r1 r2"
#
# monitor apache and the UPS
#
monitor apache 60s:30s
monitor apcfence 120m:60s
#
# cluster layout
#
group internal_www \
disk0 fs0 internal_ip apache
clone fence apcfence \
meta globally-unique=false clone-max=2 clone-node-max=1
clone conn pingd \
meta globally-unique=false clone-max=2 clone-node-max=1
location node_pref internal_www \
rule 50: #uname eq node1 \
rule pingd: defined pingd
#
# cluster properties
#
property stonith-enabled=true
commit
EOF
If you've ever done a CRM style configuration, you should be able
to understand the above examples without much difficulties. The
CLI should provide a means to manage the cluster efficiently or
put together a configuration in a concise manner.
The `(live)` string in the prompt signifies that the current CIB
in use is the cluster live configuration. It is also possible to
work with the so-called shadow CIBs, i.e. configurations which
are stored in files and aren't active, but may be applied at any
time to the cluster.
Since the CIB is hierarchical such is the interface too. There
are several levels and entering each of them enables the user to
use a certain set of commands.
=== Shadow CIB usage
Shadow CIB is a new feature. Shadow CIBs may be manipulated in
the same way like the _live_ CIB, but these changes have no
effect on the cluster resources. The administrator may choose to
apply any of them to the cluster, thus replacing the running
configuration with the one which is in the shadow. The `crm`
prompt always contains the name of the configuration which is
currently in use. Note that, for obvious reasons, only commands
at the `configure` level make sense while working with a shadow
CIB.
No changes take place before the `configure commit` command.
Sometimes though, the administrator may start working with the
running configuration, but change mind and instead of committing
the changes to the cluster save them to a shadow CIB. This
short `configure` session excerpt shows how:
...............
crm(live)configure# cib new test-2
INFO: test-2 shadow CIB created
crm(test-2)configure# commit
...............
=== Templates
Templates are ready made configurations created by cluster
experts. They are designed in such a way, so that users may
generate valid cluster configurations with minimum effort.
If you are new to Pacemaker/CRM, templates may be the best way to
start.
We will show here how to create a simple yet functional Apache
configuration:
...............
crm(live)configure template# new web apache
INFO: pulling in template apache
INFO: pulling in template virtual-ip
crm(live)configure template# show
ERROR: 23: required parameter id not set
ERROR: 28: required parameter ip not set
ERROR: 56: required parameter id not set
ERROR: 60: required parameter configfile not set
crm(live)configure template# edit
...............
The `new` command creates a configuration from the `apache`
template. Note that that template depends on a virtual IP
address which is automatically pulled along.
The `show` command, which should display the resulting
configuration, may be used to get an idea about the minimum
required changes which have to be done.
The `edit` command invokes the preferred text editor with the
`web` configuration. At the top of the file, the user is advised
how to make changes. After editing the file, use `show` again to
display the configuration:
...............
crm(live)configure template# show
primitive public-ip ocf:heartbeat:IPaddr \
params ip="192.168.1.101"
primitive websvc ocf:heartbeat:apache \
params configfile="/etc/apache2/httpd.conf"
monitor websvc 120s:60s
collocation websvc_with_public-ip inf: websvc public-ip
order public-ip_before_websvc inf: public-ip websvc
...............
Finally, the configuration may be applied to the current cluster
CIB:
...............
crm(live)configure template# apply
crm(live)configure template# cd ..
crm(live)configure# show
primitive public-ip ocf:heartbeat:IPaddr \
params ip="192.168.1.101"
primitive websvc ocf:heartbeat:apache \
params configfile="/etc/apache2/httpd.conf"
op monitor interval="120s" timeout="60s"
colocation websvc_with_public-ip inf: websvc public-ip
order public-ip_before_websvc inf: public-ip websvc
...............
=== Tab completion
The `crm` makes extensive use of the tab completion of
`readline`. The completion is both static (i.e. for `crm`
commands) and dynamic. The latter takes into account the current
status of the cluster or information from installed resource
agents. Sometimes, completion may also be used to get short help
on resource parameters. Here a few examples:
...............
crm(live)# resource <TAB><TAB>
bye exit manage param show unmanage
cd failcount meta quit start unmigrate
cleanup help migrate refresh status unmove
end list move reprobe stop up
crm(live)# configure
crm(live)configure# primitive fence-1 <TAB><TAB>
heartbeat: lsb: ocf: stonith:
crm(live)configure# primitive fence-1 stonith:ipmilan params <TAB><TAB>
auth= hostname= ipaddr= login= password= port= priv=
crm(live)configure# primitive fence-1 stonith:ipmilan params auth=<TAB><TAB>
auth* (string)
The authorization type of the IPMI session ("none", "straight", "md2", or "md5")
crm(live)configure# primitive fence-1 stonith:ipmilan params auth=
...............
== Reference
We define a small and simple language. Most commands consist of
just a list of simple tokens. The only complex constructs are
found at the `configure` level.
The syntax is described in a somewhat informal manner: `<>`
denotes a string, `[]` means that the construct is optional, the
ellipsis (`...`) signifies that the previous construct may be
repeated, `|` means pick one of many, and the rest are literals
(strings, `:`, `=`).
=== `cib` (shadow CIBs)
This level is for management of shadow CIBs. It is available both
at the top level and the `configure` level.
All the commands are implemented using `cib_shadow(8)` and the
`CIB_shadow` environment variable. The user prompt always
includes the name of the currently active shadow or the live CIB.
==== `list`
List existing shadow CIBs.
Usage:
...............
list
...............
==== `new/delete`
Create a new shadow CIB or delete an existing one. On `new`,
the live cluster configuration is copied.
Usage:
...............
new <cib>
delete <cib>
...............
==== `reset`
Copy the current cluster configuration into the shadow CIB.
Usage:
...............
reset <cib>
...............
==== `use`
Choose a CIB. Leave out the CIB name to switch to the running
CIB.
Usage:
...............
use [<cib>]
...............
==== `diff`
Print differences between the current cluster configuration and
the active shadow CIB.
Usage:
...............
diff
...............
==== `commit`
Apply a shadow CIB to the cluster.
Usage:
...............
commit <cib>
...............
=== `ra`
This level contains commands which show various information about
the installed resource agents. It is available both at the top
level and at the `configure` level.
==== `classes`
Print all resource agents' classes and, where appropriate, a list
of available providers.
Usage:
...............
classes
...............
==== `list`
List available resource agents for the given class. If the class
is `ocf`, supply a provider to get agents which are available
only from that provider.
Usage:
...............
list <class> [<provider>]
...............
Example:
...............
list ocf pacemaker
...............
==== `meta`
Show the meta-data of a resource agent type. This is where users
can find information on how to use a resource agent.
Usage:
...............
meta <type> <class> [<provider>]
...............
Example:
...............
meta apache ocf
meta ipmilan stonith
...............
==== `providers`
List providers for a resource agent type.
Usage:
...............
providers <type>
...............
Example:
...............
providers apache
...............
=== `resource`
At this level resources may be managed.
All (or almost all) commands are implemented with the CRM tools
such as `crm_resource(8)`.
==== `status` (`show`, `list`)
Print resource status. If the resource parameter is left out
status of all resources is printed.
Usage:
...............
status [<rsc>]
...............
==== `start/stop`
Start/stop a resource using the `target-role` attribute.
Usage:
...............
start <rsc>
stop <rsc>
...............
==== `manage/unmanage`
Manage/unmanage a resource using the `is-managed` attribute.
Usage:
...............
manage <rsc>
unmanage <rsc>
...............
==== `migrate/unmigrate` (`move`/`unmove`)
Migrate a resource to a different node or remove the constraint
generated by the previous migrate command. If node is left out, the
resource is migrated by creating a constraint which prevents it from
running on the current node.
Usage:
...............
migrate <rsc> [<node>]
unmigrate <rsc>
...............
==== `param`
Show/edit/delete a parameter of a resource.
Usage:
...............
param <rsc> set <param> <value>
param <rsc> delete <param>
param <rsc> show <param>
...............
Example:
...............
param ip_0 show ip
...............
==== `meta`
Show/edit/delete a meta attribute of a resource. Currently, all
meta attributes of a resource may be managed with other commands
such as `resource stop`.
Usage:
...............
meta <rsc> set <attr> <value>
meta <rsc> delete <attr>
meta <rsc> show <attr>
...............
Example:
...............
meta ip_0 set target-role stopped
...............
==== `failcount`
Show/edit/delete the failcount of a resource.
Usage:
...............
failcount <rsc> set <node> <value>
failcount <rsc> delete <node>
failcount <rsc> show <node>
...............
Example:
...............
failcount fs_0 delete node2
...............
==== `cleanup`
Cleanup resource status. Typically done after the resource has
temporarily failed. If a node is omitted, cleanup on all nodes.
If there are many nodes, the command may take a while.
Usage:
...............
cleanup <rsc> [<node>]
...............
==== `refresh`
Refresh CIB from the LRM status.
Usage:
...............
refresh [<node>]
...............
==== `reprobe`
Probe for resources not started by the CRM.
Usage:
...............
reprobe [<node>]
...............
=== `node`
Node management and status commands.
==== `show`
Show a node definition. If the node parameter is omitted then all
nodes are shown.
Usage:
...............
show [<node>]
...............
==== `standby/online`
Set a node to standby or online status. The node parameter
defaults to the node where the command is run.
Usage:
...............
standby [<node>]
online [<node>]
...............
==== `delete`
Delete a node. This command will remove the node from the CIB
and, in case the heartbeat stack is running, run hb_delnode too.
Usage:
...............
delete <node>
...............
==== `attribute`
Edit node attributes. This kind of attribute should refer to
relatively static properties, such as memory size.
Usage:
...............
attribute <node> set <attr> <value>
attribute <node> delete <attr>
attribute <node> show <attr>
...............
Example:
...............
attribute node_1 set memory_size 4096
...............
==== `status-attr`
Edit node attributes which are in the CIB status section, i.e.
attributes which hold properties of a more volatile nature. One
typical example is attribute generated by the `pingd` utility.
Usage:
...............
status-attr <node> set <attr> <value>
status-attr <node> delete <attr>
status-attr <node> show <attr>
...............
Example:
...............
status-attr node_1 show pingd
...............
=== `options`
The user may set various options for the CLI program itself.
==== `skill-level`
Based on the skill-level setting, the user is allowed to use only
a subset of commands. There are three levels: operator,
administrator, and expert. The operator level allows only
commands at the `resource` and `node` levels, but not editing
or deleting resources. The administrator may do that and may also
configure the cluster at the `configure` level and manage the
shadow CIBs. The expert may do all.
Usage:
...............
skill-level level
level :: operator | administrator | expert
...............
==== `user`
Sufficient privileges are necessary in order to manage a
cluster: programs such as `crm_verify` or `crm_resource` and,
ultimately, `cibadmin` have to be run either as `root` or as the
CRM owner user (typically `hacluster`). You don't have to worry
about that if you run `crm` as `root`. A more secure way is to
run the program with your usual privileges, set this option to
the appropriate user (such as `hacluster`), and setup the
`sudoers` file.
Usage:
...............
user system-user
...............
Example:
...............
user hacluster
...............
==== `editor`
The `edit` command invokes an editor. Use this to specify your
prefered editor program. If not set, it will default to either
the value of the `EDITOR` environment variable or to one of the
standard UNIX editors (`vi`,`emacs`,`nano`).
Usage:
...............
editor program
...............
Example:
...............
editor vim
...............
==== `pager`
The `view` command displays text through a pager. Use this to
specify your prefered pager program. If not set, it will default
to either the value of the `PAGER` environment variable or to one
of the standard UNIX system pagers (`less`,`more`,`pg`).
==== `output`
`crm` shows configurations in color, similar to for instance the
`ls --color` command. Possible values are `plain` and `color`.
==== `colorscheme`
With `output` set to `color`, a comma separated list of colors
from this option are used to emphasize:
- keywords
- object ids
- attribute names
- attribute values
- scores
- resource references
`crm` can show colors only if there is curses support for python
installed (usually provided by the `python-curses` package). The
colors are whatever is available in your terminal. Use `normal`
if you want to keep the default foreground color.
This user preference defaults to
`yellow,normal,cyan,red,green,magenta` which is good for
terminals with dark background. You may want to change the color
scheme and save it in the preferences file for other color
setups.
Example:
...............
colorscheme yellow,normal,blue,red,green,magenta
...............
==== `show`
Display all current settings.
==== `save`
Save current settings to the rc file (`$HOME/.crm.rc`). On
further `crm` runs, the rc file is automatically read and parsed.
=== `configure`
This level enables all CIB object definition commands.
The configuration may be logically divided into four parts:
nodes, resources, constraints, and (cluster) properties and
attributes. Each of these commands support one or more basic CIB
objects.
Nodes and attributes describing nodes are managed using the
`node` command.
Commands for resources are:
- `primitive`
- `monitor`
- `group`
- `clone`
- `ms`/`master` (master-slave)
There are three types of constraints:
- `location`
- `colocation`
- `order`
Finally, there are the cluster properties, resource meta
attributes defaults, and operations defaults. All are just a set
of attributes. These attributes are managed by the following
commands:
- `property`
- `rsc_defaults`
- `op_defaults`
The changes applied to the current CIB only on ending the
configuration session or using the `commit` command.
==== `node`
The node command describes a cluster node. Nodes in the CIB are
commonly created automatically by the CRM. Hence, you should not
need to deal with nodes unless you also want to define node
attributes. Note that it is also possible to manage node
attributes at the `node` level.
Usage:
...............
node <uname>[:<type>]
[attributes <param>=<value> [<param>=<value>...]]
type :: normal | member | ping
...............
Example:
...............
node node1
node big_node attributes memory=64
...............
==== `primitive`
The primitive command describes a resource. It may be referenced
only once in group, clone, or master-slave objects. If it's not
referenced, then it is placed as a single resource in the CIB.
Operations may be specified in three ways. "Anonymous" as a
simple list of "op" specifications. Use that if you don't want to
reference the set of operations elsewhere. That's by far the most
common way to define operations. If reusing operation sets is
desired, use the "operations" keyword along with the id to give
the operations set a name and the id-ref to reference another set
of operations.
Operation's attributes which are not recognized are saved as
instance attributes of that operation. A typical example is
`OCF_CHECK_LEVEL`.
Usage:
...............
primitive <rsc> [<class>:[<provider>:]]<type>
[params attr_list]
[meta attr_list]
[operations id_spec]
[op op_type [<attribute>=<value>...] ...]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
id_spec :: $id=<id> | $id-ref=<id>
op_type :: start | stop | monitor
...............
Example:
...............
primitive apcfence stonith:apcsmart \
params ttydev=/dev/ttyS0 hostlist="node1 node2" \
op start timeout=60s \
op monitor interval=30m timeout=60s
primitive www8 apache \
params configfile=/etc/apache/www8.conf \
operations $id-ref=apache_ops
primitive db0 mysql \
params config=/etc/mysql/db0.conf \
op monitor interval=60s \
op monitor interval=300s OCF_CHECK_LEVEL=10
...............
==== `monitor`
Monitor is by far the most common operation. It is possible to
add it without editing the whole resource. Also, long primitive
definitions may be a bit uncluttered. In order to make this
command as concise as possible, less common operation attributes
are not available. If you need them, then use the `op` part of
the `primitive` command.
Usage:
...............
monitor <rsc>[:<role>] <interval>[:<timeout>]
...............
Example:
...............
monitor apcfence 60m:60s
...............
Note that after executing the command, the monitor operation may
be shown as part of the primitive definition.
==== `group`
The `group` command creates a group of resources.
Usage:
...............
group <name> <rsc> [<rsc>...]
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
group internal_www disk0 fs0 internal_ip apache \
meta target_role=stopped
...............
==== `clone`
The `clone` command creates a resource clone. It may contain a
single primitive resource or one group of resources.
Usage:
...............
clone <name> <rsc>
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
clone cl_fence apc_1 \
meta clone-node-max=1 globally-unique=false
...............
==== `ms` (`master`)
The `ms` command creates a master/slave resource type. It may contain a
single primitive resource or one group of resources.
Usage:
...............
ms <name> <rsc>
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
ms disk1 drbd1 \
meta notify=true globally-unique=false
...............
.Note on `id-ref` usage
****************************
Instance or meta attributes (`params` and `meta`) may contain
a reference to another set of attributes. In that case, no other
attributes are allowed. Since attribute sets' ids, though they do
exist, are not shown in the `crm`, it is also possible to
reference an object instead of an attribute set. `crm` will
automatically replace such a reference with the right id:
...............
crm(live)configure# primitive a2 www-2 meta $id-ref=a1
crm(live)configure# show a2
primitive a2 ocf:heartbeat:apache \
meta $id-ref="a1-meta_attributes"
[...]
...............
It is advisable to give meaningful names to attribute sets which
are going to be referenced.
****************************
==== `location`
`location` defines the preference of nodes for the given
resource. The location constraints consist of one or more rules
which specify a score to be awarded if the rule matches.
Usage:
...............
location <id> <rsc> {node_pref|rules}
node_pref :: <score>: <node>
rules ::
rule [id_spec] [$role=<role>] <score>: <expression>
[rule [id_spec] [$role=<role>] <score>: <expression> ...]
id_spec :: $id=<id> | $id-ref=<id>
score :: <number> | <attribute> | [-]inf
- expression :: <single_exp> [bool_op <simple_exp> ...]
- | <date_expr>
+ expression :: <simple_exp> [bool_op <simple_exp> ...]
bool_op :: or | and
- single_exp :: <attribute> [type:]<binary_op> <value>
+ simple_exp :: <attribute> [type:]<binary_op> <value>
| <unary_op> <attribute>
+ | date <date_expr>
type :: string | version | number
binary_op :: lt | gt | lte | gte | eq | ne
unary_op :: defined | not_defined
- date_expr :: date_op <start> [<end>] (TBD)
+ date_expr :: lt <end>
+ | gt <start>
+ | in_range start=<start> end=<end>
+ | in_range start=<start> <duration>
+ | date_spec <date_spec>
+ duration|date_spec ::
+ hours=<value>
+ | monthdays=<value>
+ | weekdays=<value>
+ | yearsdays=<value>
+ | months=<value>
+ | weeks=<value>
+ | years=<value>
+ | weekyears=<value>
+ | moon=<value>
...............
Examples:
...............
location conn_1 internal_www 100: node1
location conn_1 internal_www \
rule 50: #uname eq node1 \
rule pingd: defined pingd
location conn_2 dummy_float \
rule -inf: not_defined pingd or pingd lte 0
...............
==== `colocation` (`collocation`)
This constraint expresses the placement relation between two
resources.
Usage:
...............
colocation <id> <score>: <rsc>[:<role>] <rsc>[:<role>]
...............
Example:
...............
colocation dummy_and_apache -inf: apache dummy
...............
==== `order`
This constraint expresses the order of actions on two resources.
Usage:
...............
order <id> score-type: <first-rsc>[:<action>] <then-rsc>[:<action>]
[symmetrical=<bool>]
score-type :: advisory | mandatory | <score>
...............
Example:
...............
order c_apache_1 mandatory: apache:start ip_1
...............
==== `property`
Set the cluster (`crm_config`) options.
Usage:
...............
property [$id=<set_id>] <option>=<value> [<option>=<value> ...]
...............
Example:
...............
property stonith-enabled=true
...............
==== `rsc_defaults`
Set defaults for the resource meta attributes.
Usage:
...............
rsc_defaults [$id=<set_id>] <option>=<value> [<option>=<value> ...]
...............
Example:
...............
rsc_defaults failure-timeout=3m
...............
==== `op_defaults`
Set defaults for the operations meta attributes.
Usage:
...............
op_defaults [$id=<set_id>] <option>=<value> [<option>=<value> ...]
...............
Example:
...............
op_defaults record-pending=true
...............
=== `show`
The `show` command displays objects. It may display all objects
or a set of objects. The user may also choose to see only objects
which were changed.
Optionally, the XML code may be displayed instead of the CLI
representation.
Usage:
...............
show [xml] [<id> ...]
show [xml] changed
...............
=== `edit`
This command invokes the editor with the object description. As
with the `show` command, the user may choose to edit all objects
or a set of objects.
If the user insists, he or she may edit the XML edition of the
object. If you do that, don't modify any id attributes.
Usage:
...............
edit [xml] [<id> ...]
edit [xml] changed
...............
=== `delete`
Delete one or more objects. If an object to be deleted belongs to
a container object, such as a group, and it is the only resource
in that container, then the container is deleted as well. Any
related constraints are removed as well.
Usage:
...............
delete <id> [<id>...]
...............
=== `rename`
Rename an object. It is recommended to use this command to rename
a resource, because it will take care of updating all related
constraints and a parent resource. Changing ids with the edit
command won't have the same effect.
If you want to rename a resource, it must be in the stopped state.
Usage:
...............
rename <old_id> <new_id>
...............
=== `refresh`
Refresh the internal structures from the CIB. All changes made
during this session are lost.
Usage:
...............
refresh
...............
=== `erase`
The `erase` clears all configuration. Apart from nodes. To remove
nodes, you have to specify an additional keyword `nodes`.
Note that removing nodes from the live cluster may have some
strange/interesting/unwelcome effects.
Usage:
...............
erase [nodes]
...............
=== `ptest`
Show PE (policy engine) motions using ptest.
A CIB is constructed using the current user edited version and
the status from the running CIB. The resulting CIB is run through
ptest to show changes. If you have graphviz installed and X11
session, dotty(1) is run to display the changes graphically.
Usage:
...............
ptest
...............
=== `commit`
Commit the current configuration to the CIB in use. As noted
elsewhere, commands in a configure session don't have immediate
effect on the CIB. All changes are applied at one point in time,
either using `commit` or when the user leaves the configure
level. In case the CIB in use changed in the meantime, presumably
by somebody else, the CLI will refuse to apply the changes. If
you know that it's fine to still apply them add `force`.
Usage:
...............
commit [force]
...............
=== `upgrade`
If you get the `CIB not supported` error, which typically means
that the current CIB version is coming from the older release,
you may try to upgrade it to the latest revision. The command
to perform the upgrade is:
...............
# cibadmin --upgrade --force
...............
If we don't recognize the current CIB as the old one, but you're
sure that it is, you may force the command.
Usage:
...............
upgrade [force]
...............
=== `verify`
Verify the contents of the CIB which would be committed.
Usage:
...............
verify
...............
=== `save`
Save the configuration of the current level to a file.
Optionally, as XML.
Usage:
...............
save [xml] <file>
...............
Example:
...............
save myfirstcib.txt
...............
=== `load`
Load a part of configuration (or all of it) from a local file or
a network URL. The `replace` method replaces the current
configuration with the one from the source. The `update` tries to
import the contents into the current configuration.
The file may be a CLI file or an XML file.
Usage:
...............
load [xml] method URL
method :: replace | update
...............
Example:
...............
load xml update myfirstcib.xml
load xml replace http://storage.big.com/cibs/bigcib.xml
...............
=== `template`
User may be assisted in the cluster configuration by templates
prepared in advance. Templates consist of a typical ready
configuration which may be edited to suit particular user needs.
This command enters a template level where additional commands
for configuration/template management are available.
==== `new`
Create a new configuration from one or more templates. Note that
configurations and templates are kept in different places, so it
is possible to have a configuration name equal a template name.
Usage:
...............
new <config> <template> [<template> ...]
...............
Example:
...............
new vip virtual-ip
...............
==== `load`
Load an existing configuration. Further `edit`, `show`, and
`apply` commands will refer to this configuration.
Usage:
...............
load <config>
...............
==== `delete`
Remove a configuration. The loaded (active) configuration may be
removed by forced.
Usage:
...............
delete <config> [force]
...............
==== `list`
List existing configurations or templates.
Usage:
...............
list [templates]
...............
==== `apply`
Copy the current or given configuration to the current CIB. The
CIB is effectively replaced.
Usage:
...............
apply [<config>]
...............
==== `show`
Process the current or given configuration and display the result.
Usage:
...............
show [<config>]
...............
=== `end` (`cd`, `up`)
The `end` command ends the current level and the user moves to
the parent level. This command is available everywhere.
Usage:
...............
end
...............
=== `help`
The `help` command prints help for the current level or for the
specified topic (command). This command is available everywhere.
Usage:
...............
help [<topic>]
...............
=== `quit` (`exit`, `bye`)
Leave the program.
//////////////////////
vim:ts=4:sw=4:expandtab:
//////////////////////
diff --git a/tools/crm.in b/tools/crm.in
index 218a6d9922..aee899179e 100644
--- a/tools/crm.in
+++ b/tools/crm.in
@@ -1,6472 +1,6573 @@
#!/usr/bin/env python
#
# Copyright (C) 2008 Dejan Muhamedagic <dmuhamedagic@suse.de>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import shlex
import os
from tempfile import mkstemp
import subprocess
import sys
import time
import readline
import copy
import xml.dom.minidom
import signal
import re
lineno = -1
regression_tests = False
class ErrorBuffer(object):
'''
Show error messages either immediately or buffered.
'''
def __init__(self):
self.msg_list = []
self.mode = "immediate"
def buffer(self):
self.mode = "keep"
def release(self):
if self.msg_list:
print >> sys.stderr, '\n'.join(self.msg_list)
if not batch:
raw_input("Press enter to continue... ")
self.msg_list = []
self.mode = "immediate"
def writemsg(self,msg):
if self.mode == "immediate":
if regression_tests:
print msg
else:
print >> sys.stderr, msg
else:
self.msg_list.append(msg)
def error(self,s):
self.writemsg("ERROR: %s" % add_lineno(s))
def warning(self,s):
self.writemsg("WARNING: %s" % add_lineno(s))
def info(self,s):
self.writemsg("INFO: %s" % add_lineno(s))
def add_lineno(s):
if lineno > 0:
return "%d: %s" % (lineno,s)
else: return s
def common_err(s):
err_buf.error(s)
def common_warn(s):
err_buf.warning(s)
def common_info(s):
err_buf.info(s)
def no_prog_err(name):
err_buf.error("%s not available, check your installation"%name)
def missing_prog_warn(name):
err_buf.warning("could not find any %s on the system"%name)
def no_attribute_err(attr,obj_type):
err_buf.error("required attribute %s not found in %s"%(attr,obj_type))
def bad_def_err(what,msg):
err_buf.error("bad %s definition: %s"%(what,msg))
def unsupported_err(name):
err_buf.error("%s is not supported"%name)
def no_such_obj_err(name):
err_buf.error("%s object is not supported"%name)
def obj_cli_err(name):
err_buf.error("object %s cannot be represented in the CLI notation"%name)
def missing_obj_err(node):
err_buf.error("object %s:%s missing (shouldn't have happened)"% \
(node.tagName,node.getAttribute("id")))
def constraint_norefobj_err(constraint_id,obj_id):
err_buf.error("constraint %s references a resource %s which doesn't exist"% \
(constraint_id,obj_id))
def obj_exists_err(name):
err_buf.error("object %s already exists"%name)
def no_object_err(name):
err_buf.error("object %s does not exist"%name)
def invalid_id_err(obj_id):
err_buf.error("%s: invalid object id"%obj_id)
def id_used_err(node_id):
err_buf.error("%s: id is already in use"%node_id)
def skill_err(s):
err_buf.error("%s: this command is not allowed at this skill level"%' '.join(s))
def syntax_err(s,token = '',context = ''):
pfx = "syntax"
if context:
pfx = "%s in %s" %(pfx,context)
if type(s) == type(''):
err_buf.error("%s near <%s>"%(pfx,s))
elif token:
err_buf.error("%s near <%s>: %s"%(pfx,token,' '.join(s)))
else:
err_buf.error("%s: %s"%(pfx,' '.join(s)))
def bad_attr_usage(cmd,args):
err_buf.error("bad usage: %s %s"%(cmd,args))
def empty_cib_err():
err_buf.error("No CIB!")
def cib_parse_err(msg):
err_buf.error("%s"%msg)
def cib_no_elem_err(el_name):
err_buf.error("CIB contains no '%s' element!"%el_name)
def cib_ver_unsupported_err(validator,rel):
err_buf.error("CIB not supported: validator '%s', release '%s'"% (validator,rel))
err_buf.error("You may try the upgrade command")
def update_err(obj_id,cibadm_opt,xml):
if cibadm_opt == '-U':
task = "update"
elif cibadm_opt == '-D':
task = "delete"
else:
task = "replace"
err_buf.error("could not %s %s"%(task,obj_id))
err_buf.info("offending xml: %s" % xml)
def not_impl_info(s):
err_buf.info("%s is not implemented yet" % s)
def ask(msg):
print_msg = True
while True:
ans = raw_input(msg + ' ')
if not ans or ans[0].lower() not in ('n','y'):
if print_msg:
print "Please answer with y[es] or n[o]"
print_msg = False
else:
return ans[0].lower() == 'y'
from UserDict import DictMixin
class odict(DictMixin):
def __init__(self, data=None, **kwdata):
self._keys = []
self._data = {}
def __setitem__(self, key, value):
if key not in self._data:
self._keys.append(key)
self._data[key] = value
def __getitem__(self, key):
return self._data[key]
def __delitem__(self, key):
del self._data[key]
self._keys.remove(key)
def keys(self):
return list(self._keys)
def copy(self):
copyDict = odict()
copyDict._data = self._data.copy()
copyDict._keys = self._keys[:]
return copyDict
# from: http://code.activestate.com/recipes/475116/
class TerminalController(object):
"""
A class that can be used to portably generate formatted output to
a terminal.
`TerminalController` defines a set of instance variables whose
values are initialized to the control sequence necessary to
perform a given action. These can be simply included in normal
output to the terminal:
>>> term = TerminalController()
>>> print 'This is '+term.GREEN+'green'+term.NORMAL
Alternatively, the `render()` method can used, which replaces
'${action}' with the string required to perform 'action':
>>> term = TerminalController()
>>> print term.render('This is ${GREEN}green${NORMAL}')
If the terminal doesn't support a given action, then the value of
the corresponding instance variable will be set to ''. As a
result, the above code will still work on terminals that do not
support color, except that their output will not be colored.
Also, this means that you can test whether the terminal supports a
given action by simply testing the truth value of the
corresponding instance variable:
>>> term = TerminalController()
>>> if term.CLEAR_SCREEN:
... print 'This terminal supports clearning the screen.'
Finally, if the width and height of the terminal are known, then
they will be stored in the `COLS` and `LINES` attributes.
"""
# Cursor movement:
BOL = '' #: Move the cursor to the beginning of the line
UP = '' #: Move the cursor up one line
DOWN = '' #: Move the cursor down one line
LEFT = '' #: Move the cursor left one char
RIGHT = '' #: Move the cursor right one char
# Deletion:
CLEAR_SCREEN = '' #: Clear the screen and move to home position
CLEAR_EOL = '' #: Clear to the end of the line.
CLEAR_BOL = '' #: Clear to the beginning of the line.
CLEAR_EOS = '' #: Clear to the end of the screen
# Output modes:
BOLD = '' #: Turn on bold mode
BLINK = '' #: Turn on blink mode
DIM = '' #: Turn on half-bright mode
REVERSE = '' #: Turn on reverse-video mode
NORMAL = '' #: Turn off all modes
# Cursor display:
HIDE_CURSOR = '' #: Make the cursor invisible
SHOW_CURSOR = '' #: Make the cursor visible
# Terminal size:
COLS = None #: Width of the terminal (None for unknown)
LINES = None #: Height of the terminal (None for unknown)
# Foreground colors:
BLACK = BLUE = GREEN = CYAN = RED = MAGENTA = YELLOW = WHITE = ''
# Background colors:
BG_BLACK = BG_BLUE = BG_GREEN = BG_CYAN = ''
BG_RED = BG_MAGENTA = BG_YELLOW = BG_WHITE = ''
_STRING_CAPABILITIES = """
BOL=cr UP=cuu1 DOWN=cud1 LEFT=cub1 RIGHT=cuf1
CLEAR_SCREEN=clear CLEAR_EOL=el CLEAR_BOL=el1 CLEAR_EOS=ed BOLD=bold
BLINK=blink DIM=dim REVERSE=rev UNDERLINE=smul NORMAL=sgr0
HIDE_CURSOR=cinvis SHOW_CURSOR=cnorm""".split()
_COLORS = """BLACK BLUE GREEN CYAN RED MAGENTA YELLOW WHITE""".split()
_ANSICOLORS = "BLACK RED GREEN YELLOW BLUE MAGENTA CYAN WHITE".split()
def __init__(self, term_stream=sys.stdout):
"""
Create a `TerminalController` and initialize its attributes
with appropriate values for the current terminal.
`term_stream` is the stream that will be used for terminal
output; if this stream is not a tty, then the terminal is
assumed to be a dumb terminal (i.e., have no capabilities).
"""
# Curses isn't available on all platforms
try: import curses
except: return
# If the stream isn't a tty, then assume it has no capabilities.
if not term_stream.isatty(): return
# Check the terminal type. If we fail, then assume that the
# terminal has no capabilities.
try: curses.setupterm()
except: return
# Look up numeric capabilities.
self.COLS = curses.tigetnum('cols')
self.LINES = curses.tigetnum('lines')
# Look up string capabilities.
for capability in self._STRING_CAPABILITIES:
(attrib, cap_name) = capability.split('=')
setattr(self, attrib, self._tigetstr(cap_name) or '')
# Colors
set_fg = self._tigetstr('setf')
if set_fg:
for i,color in zip(range(len(self._COLORS)), self._COLORS):
setattr(self, color, curses.tparm(set_fg, i) or '')
set_fg_ansi = self._tigetstr('setaf')
if set_fg_ansi:
for i,color in zip(range(len(self._ANSICOLORS)), self._ANSICOLORS):
setattr(self, color, curses.tparm(set_fg_ansi, i) or '')
set_bg = self._tigetstr('setb')
if set_bg:
for i,color in zip(range(len(self._COLORS)), self._COLORS):
setattr(self, 'BG_'+color, curses.tparm(set_bg, i) or '')
set_bg_ansi = self._tigetstr('setab')
if set_bg_ansi:
for i,color in zip(range(len(self._ANSICOLORS)), self._ANSICOLORS):
setattr(self, 'BG_'+color, curses.tparm(set_bg_ansi, i) or '')
def _tigetstr(self, cap_name):
# String capabilities can include "delays" of the form "$<2>".
# For any modern terminal, we should be able to just ignore
# these, so strip them out.
import curses
cap = curses.tigetstr(cap_name) or ''
return re.sub(r'\$<\d+>[/*]?', '', cap)
def render(self, template):
"""
Replace each $-substitutions in the given template string with
the corresponding terminal control string (if it's defined) or
'' (if it's not).
"""
return re.sub(r'\$\$|\${\w+}', self._render_sub, template)
def _render_sub(self, match):
s = match.group()
if s == '$$': return s
else: return getattr(self, s[2:-1])
def is_color(self, s):
try:
attr = getattr(self, s.upper())
return attr != None
except: return False
class CliDisplay(object):
"""
Display output for various syntax elements.
"""
def __init__(self):
self.no_pretty = False
def set_no_pretty(self):
self.no_pretty = True
def reset_no_pretty(self):
self.no_pretty = False
def colorstring(self, clrnum, s):
if self.no_pretty:
return s
else:
return termctrl.render("${%s}%s${NORMAL}" % \
(user_prefs.colorscheme[clrnum].upper(), s))
def keyword(self, kw):
if user_prefs.output == "color":
return self.colorstring(0, kw)
else:
return kw
def otherword(self, n, s):
if user_prefs.output == "color":
return self.colorstring(n, s)
else:
return s
def id(self, s):
return self.otherword(1, s)
def attr_name(self, s):
return self.otherword(2, s)
def attr_value(self, s):
return self.otherword(3, s)
def rscref(self, s):
return self.otherword(4, s)
def score(self, s):
return self.otherword(5, s)
global_aliases = {
"quit": ("bye","exit"),
"end": ("cd","up"),
}
def setup_aliases(obj):
for cmd in obj.cmd_aliases.keys():
for alias in obj.cmd_aliases[cmd]:
obj.help_table[alias] = obj.help_table[cmd]
obj.cmd_table[alias] = obj.cmd_table[cmd]
#
# Resource Agents interface (meta-data, parameters, etc)
#
def lrmadmin(opts, xml = False):
'''
Get information directly from lrmd using lrmadmin.
'''
lrmadmin_prog = "@sbindir@/lrmadmin"
l = []
#print "invoke: lrmadmin",opts
if is_program(lrmadmin_prog) and is_process("lrmd"):
l = stdin2list("%s %s" % (lrmadmin_prog,opts))
if not xml:
l = l[1:] # skip the first line
return l
def pengine_meta():
'''
Do pengine metadata.
'''
pengine = "@CRM_DAEMON_DIR@/pengine"
l = []
if is_program(pengine):
l = stdin2list("%s metadata" % pengine)
return l
def get_nodes_text(n,tag):
try:
node = n.getElementsByTagName(tag)[0]
for c in node.childNodes:
if c.nodeType == c.TEXT_NODE:
return c.data.strip()
except: return ''
def ra_classes():
'''
List of RA classes.
'''
if wcache.is_cached("ra_classes"):
return wcache.retrieve("ra_classes")
l = lrmadmin("-C")
l.sort()
return wcache.store("ra_classes",l)
def ra_providers(ra_type,ra_class = "ocf"):
'List of providers for a class:type.'
id = "ra_providers-%s-%s" % (ra_class,ra_type)
if wcache.is_cached(id):
return wcache.retrieve(id)
l = lrmadmin("-P %s %s" % (ra_class,ra_type),True)
l.sort()
return wcache.store(id,l)
def ra_providers_all(ra_class = "ocf"):
'''
List of providers for a class:type.
'''
id = "ra_providers_all-%s" % ra_class
if wcache.is_cached(id):
return wcache.retrieve(id)
ocf_root = os.getenv("@OCF_ROOT_DIR@")
if not ocf_root:
ocf_root = "/usr/lib/ocf"
dir = ocf_root + "/resource.d"
l = []
for s in os.listdir(dir):
if os.path.isdir("%s/%s" % (dir,s)):
l.append(s)
l.sort()
return wcache.store(id,l)
def ra_types(ra_class = "ocf", ra_provider = ""):
'''
List of RA type for a class.
'''
if not ra_class:
ra_class = "ocf"
id = "ra_types-%s-%s" % (ra_class,ra_provider)
if wcache.is_cached(id):
return wcache.retrieve(id)
if ra_provider:
list = []
for ra in lrmadmin("-T %s" % ra_class):
if ra_provider in ra_providers(ra,ra_class):
list.append(ra)
else:
list = lrmadmin("-T %s" % ra_class)
list.sort()
return wcache.store(id,list)
class RAInfo(object):
'''
A resource agent and whatever's useful about it.
'''
ra_tab = " " # four horses
skip_ops = ("meta-data", "validate-all")
act_attr = ("timeout", "interval", "depth")
def __init__(self,ra_class,ra_type,ra_provider = "heartbeat"):
self.ra_class = ra_class
self.ra_type = ra_type
self.ra_provider = ra_provider
if not self.ra_provider:
self.ra_provider = "heartbeat"
self.mk_ra_node() # indirectly caches meta-data and doc
def mk_ra_node(self):
'''
Return the resource_agent node.
'''
meta = self.meta()
try:
self.doc = xml.dom.minidom.parseString('\n'.join(meta))
except:
#common_err("could not parse meta-data for (%s,%s,%s)" \
# % (self.ra_class,self.ra_type,self.ra_provider))
self.ra_node = None
return
try:
self.ra_node = self.doc.getElementsByTagName("resource-agent")[0]
except:
common_err("meta-data contains no resource-agent element")
self.ra_node = None
def params(self):
'''
Construct a dict: parameters are keys and lists of flags
(required and unique) are values. Cached too.
'''
id = "ra_params-%s-%s-%s"%(self.ra_class,self.ra_type,self.ra_provider)
if wcache.is_cached(id):
return wcache.retrieve(id)
if not self.ra_node:
return None
d = {}
for pset in self.ra_node.getElementsByTagName("parameters"):
for c in pset.getElementsByTagName("parameter"):
name = c.getAttribute("name")
if not name:
continue
required = c.getAttribute("required")
unique = c.getAttribute("unique")
d[name] = (required == '1',unique == '1')
return wcache.store(id,d)
def params_list(self):
'''
List of parameters.
'''
try:
l = self.params().keys()
l.sort()
return l
except:
return []
def reqd_params_list(self):
'''
List of required parameters.
'''
d = self.params()
if not d: return []
return [x for x in d if d[x][0]]
def is_param_reqd(self,pname):
'''
Is pname a required parameter?
'''
return pname in self.reqd_params_list()
def meta(self):
'''
RA meta-data as raw xml.
'''
id = "ra_meta-%s-%s-%s" % (self.ra_class,self.ra_type,self.ra_provider)
if wcache.is_cached(id):
return wcache.retrieve(id)
if self.ra_class == "pengine":
l = pengine_meta()
else:
l = lrmadmin("-M %s %s %s" % (self.ra_class,self.ra_type,self.ra_provider),True)
return wcache.store(id, l)
def meta_pretty(self):
'''
Print the RA meta-data in a human readable form.
'''
if not self.ra_node:
return ''
l = []
title = self.meta_title()
l.append(title)
longdesc = get_nodes_text(self.ra_node,"longdesc")
if longdesc:
l.append(longdesc)
if self.ra_class != "heartbeat":
params = self.meta_parameters()
if params:
l.append(params.rstrip())
actions = self.meta_actions()
if actions:
l.append(actions)
return '\n\n'.join(l)
def meta_title(self):
if self.ra_class == "ocf":
s = "%s:%s:%s" % (self.ra_class,self.ra_provider,self.ra_type)
else:
s = "%s:%s" % (self.ra_class,self.ra_type)
shortdesc = get_nodes_text(self.ra_node,"shortdesc")
if shortdesc and shortdesc != self.ra_type:
s = "%s (%s)" % (shortdesc,s)
return s
def meta_param_head(self,n):
type = default = None
name = n.getAttribute("name")
if not name:
return None
s = name
if n.getAttribute("required") == "1":
s = s + "*"
try:
content = n.getElementsByTagName("content")[0]
type = content.getAttribute("type")
default = content.getAttribute("default")
except: pass
if type and default:
s = "%s (%s, [%s])" % (s,type,default)
elif type:
s = "%s (%s)" % (s,type)
shortdesc = get_nodes_text(n,"shortdesc")
if shortdesc and shortdesc != name:
s = "%s: %s" % (s,shortdesc)
return s
def format_parameter(self,n):
l = []
head = self.meta_param_head(n)
if not head:
common_err("no name attribute for parameter")
return ""
l.append(head)
longdesc = get_nodes_text(n,"longdesc")
if longdesc:
longdesc = self.ra_tab + longdesc.replace("\n","\n"+self.ra_tab) + '\n'
l.append(longdesc)
return '\n'.join(l)
def meta_parameter(self,param):
if not self.ra_node:
return ''
l = []
for pset in self.ra_node.getElementsByTagName("parameters"):
for c in pset.getElementsByTagName("parameter"):
if c.getAttribute("name") == param:
return self.format_parameter(c)
def meta_parameters(self):
if not self.ra_node:
return ''
l = []
for pset in self.ra_node.getElementsByTagName("parameters"):
for c in pset.getElementsByTagName("parameter"):
s = self.format_parameter(c)
if s:
l.append(s)
if l:
return "Parameters (* denotes required, [] the default):\n\n" + '\n'.join(l)
def meta_action_head(self,n):
name = n.getAttribute("name")
if not name:
return ''
if name in self.skip_ops:
return ''
s = "%-8s" % name
for a in self.act_attr:
v = n.getAttribute(a)
if v:
s = "%s %s=%s" % (s,a,v)
return s
def meta_actions(self):
l = []
for aset in self.ra_node.getElementsByTagName("actions"):
for c in aset.getElementsByTagName("action"):
s = self.meta_action_head(c)
if s:
l.append(self.ra_tab + s)
if l:
return "Operations' defaults (advisory minimum):\n\n" + '\n'.join(l)
def cmd_end(cmd,dir = ".."):
"Go up one level."
levels.droplevel()
def cmd_exit(cmd):
"Exit the crm program"
cmd_end(cmd)
if interactive:
print "bye"
try:
readline.write_history_file(hist_file)
except:
pass
for f in tmpfiles:
os.unlink(f)
sys.exit()
#
# help or make users feel less lonely
#
def add_shorthelp(topic,shorthelp,topic_help):
'''
Join topics ("%s,%s") if they share the same short
description.
'''
for i in range(len(topic_help)):
if topic_help[i][1] == shorthelp:
topic_help[i][0] = "%s,%s" % (topic_help[i][0], topic)
return
topic_help.append([topic, shorthelp])
def dump_short_help(help_tab):
topic_help = []
for topic in help_tab:
if topic == '.':
continue
# with odict, for whatever reason, python parses differently:
# help_tab["..."] = ("...","...") and
# help_tab["..."] = ("...","""
# ...""")
# a parser bug?
if type(help_tab[topic][0]) == type(()):
shorthelp = help_tab[topic][0][0]
else:
shorthelp = help_tab[topic][0]
add_shorthelp(topic,shorthelp,topic_help)
for t,d in topic_help:
print "\t%-16s %s" % (t,d)
def overview(help_tab):
print ""
print help_tab['.'][1]
print ""
print "Available commands:"
print ""
dump_short_help(help_tab)
print ""
def topic_help(help_tab,topic):
if topic not in help_tab:
print "There is no help for topic %s" % topic
return
if type(help_tab[topic][0]) == type(()):
shorthelp = help_tab[topic][0][0]
longhelp = help_tab[topic][0][1]
else:
shorthelp = help_tab[topic][0]
longhelp = help_tab[topic][1]
print longhelp or shorthelp
def cmd_help(help_tab,topic = ''):
"help!"
# help_tab is an odict (ordered dictionary):
# help_tab[topic] = (short_help,long_help)
# topic '.' is a special entry for the top level
if not topic:
overview(help_tab)
else:
topic_help(help_tab,topic)
def add_sudo(cmd):
if user_prefs.crm_user:
return "sudo -E -u %s %s"%(user_prefs.crm_user,cmd)
return cmd
def pipe_string(cmd,s):
rc = -1 # command failed
cmd = add_sudo(cmd)
p = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE)
try:
p.communicate(s)
p.wait()
rc = p.returncode
except IOError, msg:
common_err(msg)
return rc
def xml2doc(cmd):
cmd = add_sudo(cmd)
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
try:
doc = xml.dom.minidom.parse(p.stdout)
except xml.parsers.expat.ExpatError,msg:
common_err("cannot parse output of %s: %s"%(cmd,msg))
p.wait()
return None
p.wait()
return doc
def str2tmp(s):
'''
Write the given string to a temporary file. Return the name
of the file.
'''
fd,tmp = mkstemp()
try: f = os.fdopen(fd,"w")
except IOError, msg:
common_err(msg)
return
f.write(s)
f.close()
return tmp
def is_filename_sane(name):
if re.match("['`/#*?$\[\]]",name):
common_err("%s: bad name"%name)
return False
return True
def is_name_sane(name):
if re.match("[']",name):
common_err("%s: bad name"%name)
return False
return True
def is_value_sane(name):
if re.match("[']",name):
common_err("%s: bad name"%name)
return False
return True
def ext_cmd(cmd):
if regression_tests:
print ".EXT", cmd
return subprocess.call(add_sudo(cmd), shell=True)
def get_stdin(cmd, stderr_on = True):
'''
Run a cmd, return stdin output.
stderr_on controls whether to show output which comes on stderr.
'''
proc = subprocess.Popen(cmd, shell=True, \
stdout=subprocess.PIPE, \
stderr=stderr_on and None or subprocess.PIPE)
outp = proc.communicate()[0]
proc.wait()
outp = outp.strip()
return outp
def stdin2list(cmd, stderr_on = True):
'''
Run a cmd, fetch output, return it as a list of lines.
stderr_on controls whether to show output which comes on stderr.
'''
s = get_stdin(add_sudo(cmd), stderr_on)
return s.split('\n')
def is_program(prog):
return subprocess.call("which %s >/dev/null 2>&1"%prog, shell=True) == 0
def find_program(envvar,*args):
if envvar and os.getenv(envvar):
return os.getenv(envvar)
for prog in args:
if is_program(prog):
return prog
def is_id_valid(id):
"""
Verify that the id follows the definition:
http://www.w3.org/TR/1999/REC-xml-names-19990114/#ns-qualnames
"""
if not id:
return False
id_re = "^[A-Za-z_][\w._-]*$"
return re.match(id_re,id)
def check_filename(fname):
"""
Verify that the string is a filename.
"""
fname_re = "^[^/]+$"
return re.match(fname_re,id)
class UserPrefs(object):
'''
Keep user preferences here.
'''
dflt_colorscheme = "yellow,normal,cyan,red,green,magenta".split(',')
def __init__(self):
self.skill_level = 2 #TODO: set back to 0?
self.editor = find_program("EDITOR","vim","vi","emacs","nano")
self.pager = find_program("PAGER","less","more","pg")
self.dotty = find_program("","dotty")
if not self.editor:
missing_prog_warn("editor")
if not self.pager:
missing_prog_warn("pager")
self.crm_user = ""
self.xmlindent = " " # two spaces
# keywords,ids,attribute names,values
self.colorscheme = self.dflt_colorscheme
# plain or color
self.output = 'color'
def check_skill_level(self,n):
return self.skill_level >= n
class CliOptions(object):
'''
Manage user preferences
'''
skill_levels = {"operator":0, "administrator":1, "expert":2}
output_types = ("plain", "color")
help_table = odict()
help_table["."] = ("user preferences","Various user preferences may be set here.")
help_table["skill-level"] = ("set skill level", "")
help_table["editor"] = ("set prefered editor program", "")
help_table["pager"] = ("set prefered pager program", "")
help_table["user"] = ("set the cluster user", """
If you need extra privileges to talk to the cluster (i.e. the cib
process), then set this to user. Typically, that is either "root"
or "hacluster". Don't forget to setup the sudoers file as well.
Example: user hacluster
""")
help_table["output"] = ("set output type", """
How to display configurations. Possible values are:
"plain" and "color".
""")
help_table["colorscheme"] = ("set colors for output", """
With output set to color, a comma separated list of colors
from this option are used to emphasize:
- keywords
- object ids
- attribute names
- attribute values
- scores
- resource references
The colors are whatever is available in your terminal. Use
"normal" if you want to keep the default foreground color.
Example:
...............
colorscheme yellow,normal,blue,red,green,magenta
...............
""")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases
def __init__(self):
self.cmd_table = {
"skill-level": (self.set_skill_level,(1,1),0,(skills_list,)),
"editor": (self.set_editor,(1,1),0),
"pager": (self.set_pager,(1,1),0),
"user": (self.set_crm_user,(0,1),0),
"output": (self.set_output,(1,1),0),
"colorscheme": (self.set_colors,(1,1),0),
"save": (self.save_options,(0,0),0),
"show": (self.show_options,(0,0),0),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
setup_aliases(self)
def set_skill_level(self,cmd,skill_level):
"""usage: skill-level <level>
level: operator | administrator | expert"""
if skill_level in self.skill_levels:
user_prefs.skill_level = self.skill_levels[skill_level]
else:
common_err("no %s skill level"%skill_level)
return False
def get_skill_level(self):
for s in self.skill_levels:
if user_prefs.skill_level == self.skill_levels[s]:
return s
def set_editor(self,cmd,prog):
"usage: editor <program>"
if is_program(prog):
user_prefs.editor = prog
else:
common_err("program %s does not exist"% prog)
return False
def set_pager(self,cmd,prog):
"usage: pager <program>"
if is_program(prog):
user_prefs.pager = prog
else:
common_err("program %s does not exist"% prog)
return False
def set_crm_user(self,cmd,user = ''):
"usage: user [<crm_user>]"
user_prefs.crm_user = user
def set_output(self,cmd,output_type):
"usage: output <type>"
if output_type in self.output_types:
user_prefs.output = output_type
else:
common_err("no %s output type"%output_type)
return False
def set_colors(self,cmd,scheme):
"usage: colorscheme <colors>"
colors = scheme.split(',')
if len(colors) != 6:
common_err("bad color scheme: %s"%scheme)
colors = UserPrefs.dflt_colorscheme
rc = True
for c in colors:
if not termctrl.is_color(c):
common_err("%s is not a recognized color" % c)
rc = False
if rc:
user_prefs.colorscheme = colors
else:
self.set_output("output","plain")
return rc
def write_rc(self,f):
print >>f, '%s "%s"' % ("editor",user_prefs.editor)
print >>f, '%s "%s"' % ("pager",user_prefs.pager)
print >>f, '%s "%s"' % ("user",user_prefs.crm_user)
print >>f, '%s "%s"' % ("skill-level",self.get_skill_level())
print >>f, '%s "%s"' % ("output",user_prefs.output)
print >>f, '%s "%s"' % \
("colorscheme", ','.join(user_prefs.colorscheme))
def show_options(self,cmd):
"usage: show"
self.write_rc(sys.stdout)
def save_options(self,cmd):
"usage: save"
try: f = open(rc_file,"w")
except os.error,msg:
common_err("open: %s"%msg)
return
print >>f, 'options'
self.write_rc(f)
print >>f, 'end'
f.close()
def help(self,cmd,topic = ''):
"usage: help [<topic>]"
cmd_help(self.help_table,topic)
cib_dump = "cibadmin -Ql"
cib_piped = "cibadmin -p"
cib_upgrade = "cibadmin --upgrade --force"
cib_verify = "crm_verify -V -p"
class WCache(object):
"Cache stuff. A naive implementation."
def __init__(self):
self.lists = {}
self.stamp = time.time()
self.max_cache_age = 600 # seconds
def is_cached(self,name):
if time.time() - self.stamp > self.max_cache_age:
self.stamp = time.time()
self.clear()
return name in self.lists
def store(self,name,lst):
self.lists[name] = lst
return lst
def retrieve(self,name):
if self.is_cached(name):
return self.lists[name]
else:
return None
def clear(self):
self.lists = {}
def listshadows():
return stdin2list("ls @CRM_CONFIG_DIR@ | fgrep shadow. | sed 's/^shadow\.//'")
class CibShadow(object):
'''
CIB shadow management class
'''
help_table = odict()
help_table["."] = ("","""
CIB shadow management.
See the crm_shadow program.
""")
help_table["new"] = ("create a new shadow CIB", "")
help_table["delete"] = ("delete a shadow CIB", "")
help_table["reset"] = ("copy live cib to a shadow CIB", "")
help_table["commit"] = ("copy a shadow CIB to the cluster", "")
help_table["use"] = ("change working CIB", '''
Choose a shadow CIB for further changes. If the name
provided is empty, then the live (cluster) CIB is used.
''')
help_table["diff"] = ("diff between the shadow CIB and the live CIB", "")
help_table["list"] = ("list all shadow CIBs", "")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
envvar = "CIB_shadow"
extcmd = ">/dev/null </dev/null crm_shadow"
cmd_aliases = global_aliases
def __init__(self):
self.cmd_table = {
"new": (self.new,(1,2),1),
"delete": (self.delete,(1,1),1,(shadows_list,)),
"reset": (self.reset,(1,1),1,(shadows_list,)),
"commit": (self.commit,(1,1),1,(shadows_list,)),
"use": (self.use,(0,1),1,(shadows_live_list,)),
"diff": (self.diff,(0,0),1),
"list": (self.list,(0,0),1),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
self.chkcmd()
setup_aliases(self)
def chkcmd(self):
try:
ext_cmd("%s 2>&1" % self.extcmd)
except os.error:
no_prog_err(self.extcmd)
return False
return True
def new(self,cmd,name,force = ''):
"usage: new <shadow_cib> [force]"
if not is_filename_sane(name):
return False
new_cmd = "%s -c '%s'" % (self.extcmd,name)
if force:
if force == "force" or force == "--force":
new_cmd = "%s --force" % new_cmd
else:
syntax_err((new_cmd,force), context = 'new')
return False
if ext_cmd(new_cmd) == 0:
common_info("%s shadow CIB created"%name)
self.use("use",name)
def delete(self,cmd,name):
"usage: delete <shadow_cib>"
if not is_filename_sane(name):
return False
if cib_in_use == name:
common_err("%s shadow CIB is in use"%name)
return False
if ext_cmd("%s -D '%s' --force" % (self.extcmd,name)) == 0:
common_info("%s shadow CIB deleted"%name)
else:
common_err("failed to delete %s shadow CIB"%name)
return False
def reset(self,cmd,name):
"usage: reset <shadow_cib>"
if not is_filename_sane(name):
return False
if ext_cmd("%s -r '%s'" % (self.extcmd,name)) == 0:
common_info("copied live CIB to %s"%name)
else:
common_err("failed to copy live CIB to %s"%name)
return False
def commit(self,cmd,name):
"usage: commit <shadow_cib>"
if not is_filename_sane(name):
return False
if ext_cmd("%s -C '%s' --force" % (self.extcmd,name)) == 0:
common_info("commited '%s' shadow CIB to the cluster"%name)
wcache.clear()
else:
common_err("failed to commit the %s shadow CIB"%name)
return False
def diff(self,cmd):
"usage: diff"
return ext_cmd("%s -d" % self.extcmd) == 0
def list(self,cmd):
"usage: list"
if regression_tests:
for t in listshadows():
print t
else:
multicolumn(listshadows())
def _use(self,name):
# Choose a shadow cib for further changes. If the name
# provided is empty, then choose the live (cluster) cib.
# Don't allow ' in shadow names
global cib_in_use
if not name or name == "live":
os.unsetenv(self.envvar)
cib_in_use = ""
else:
os.putenv(self.envvar,name)
cib_in_use = name
def use(self,cmd,name = ''):
"usage: use [<shadow_cib>]"
# check the name argument
if not is_filename_sane(name):
return False
if name and name != "live":
if ext_cmd("test -r '@CRM_CONFIG_DIR@/shadow.%s'"%name) != 0:
common_err("%s: no such shadow CIB"%name)
return False
# If invoked from configure
# take special precautions
try:
prev_level = levels.previous().myname()
except:
prev_level = ''
if prev_level != "cibconfig":
self._use(name)
return True
if not cib_factory.has_cib_changed():
self._use(name)
# new CIB: refresh the CIB factory
cib_factory.refresh()
return True
saved_cib = cib_in_use
self._use(name)
if not cib_factory.is_current_cib_equal(silent = True):
# user made changes and now wants to switch to a
# different and unequal CIB; we refuse to cooperate
common_err("you made changes and the requested CIB is different from the current one")
common_info("either commit or refresh, then try again")
self._use(saved_cib) # revert to the previous CIB
return False
else:
# the requested CIB is equal
return True
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
def get_var(l,key):
for s in l:
a = s.split()
if len(a) == 2 and a[0] == key:
return a[1]
return ''
def chk_var(l,key):
for s in l:
a = s.split()
if len(a) == 2 and a[0] == key and a[1]:
return True
return False
def chk_key(l,key):
for s in l:
a = s.split()
if len(a) >= 1 and a[0] == key:
return True
return False
def validate(l):
if not chk_var(l,'%name'):
common_err("invalid template: missing '%name'")
return False
if not chk_key(l,'%generate'):
common_err("invalid template: missing '%generate'")
return False
if not (chk_key(l,'%required') or chk_key(l[0:g],'%optional')):
common_err("invalid template: missing '%required' or '%optional'")
return False
return True
def fix_tmpl_refs(l,id,pfx):
for i in range(len(l)):
l[i] = l[i].replace(id,pfx)
def fix_tmpl_refs_re(l,regex,repl):
for i in range(len(l)):
l[i] = re.sub(regex,repl,l[i])
class LoadTemplate(object):
'''
Load a template and its dependencies, generate a
configuration file which should be relatively easy and
straightforward to parse.
'''
edit_instructions = '''# Edit instructions:
#
# Add content only at the end of lines starting with '%%'.
# Only add content, don't remove or replace anything.
# The parameters following '%required' are not optional,
# unlike those following '%optional'.
# You may also add comments for future reference.'''
no_more_edit = '''# Don't edit anything below this line.'''
def __init__(self,name):
self.name = name
self.all_pre_gen = []
self.all_post_gen = []
self.all_pfx = []
def new_pfx(self,name):
i = 1
pfx = name
while pfx in self.all_pfx:
pfx = "%s_%d" % (name,i)
i += 1
self.all_pfx.append(pfx)
return pfx
def generate(self):
return '\n'.join([ \
"# Configuration: %s" % self.name, \
'', \
self.edit_instructions, \
'', \
'\n'.join(self.all_pre_gen), \
self.no_more_edit, \
'', \
'%generate', \
'\n'.join(self.all_post_gen)])
def write_config(self,name):
try:
f = open("%s/%s" % (Template.conf_dir, name),"w")
except os.error,msg:
common_err("open: %s"%msg)
return False
print >>f, self.generate()
f.close()
return True
def load_template(self,tmpl):
try:
f = open("%s/%s" % (Template.tmpl_dir, tmpl))
except os.error,msg:
common_err("open: %s"%msg)
return ''
l = (''.join(f)).split('\n')
if not validate(l):
return ''
common_info("pulling in template %s" % tmpl)
g = l.index('%generate')
pre_gen = l[0:g]
post_gen = l[g+1:]
name = get_var(pre_gen,'%name')
for s in l[0:g]:
if s.startswith('%depends_on'):
a = s.split()
if len(a) != 2:
common_warn("%s: wrong usage" % s)
continue
tmpl_id = a[1]
tmpl_pfx = self.load_template(a[1])
if tmpl_pfx:
fix_tmpl_refs(post_gen,'%'+tmpl_id,'%'+tmpl_pfx)
pfx = self.new_pfx(name)
fix_tmpl_refs(post_gen, '%_:', '%'+pfx+':')
# replace remaining %_, it may be useful at times
fix_tmpl_refs(post_gen, '%_', pfx)
v_idx = pre_gen.index('%required') or pre_gen.index('%optional')
pre_gen.insert(v_idx,'%pfx ' + pfx)
self.all_pre_gen += pre_gen
self.all_post_gen += post_gen
return pfx
def post_process(self):
pfx_re = '(%s)' % '|'.join(self.all_pfx)
fix_tmpl_refs_re(self.all_post_gen, \
'%'+pfx_re+'([^:]|$)', r'\1\2')
# process %if ... [%else] ... %fi
rmidx_l = []
if_seq = False
for i in range(len(self.all_post_gen)):
s = self.all_post_gen[i]
if if_seq:
a = s.split()
if len(a) >= 1 and a[0] == '%fi':
if_seq = False
rmidx_l.append(i)
elif len(a) >= 1 and a[0] == '%else':
outcome = not outcome
rmidx_l.append(i)
else:
if not outcome:
rmidx_l.append(i)
continue
if not s:
continue
a = s.split()
if len(a) == 2 and a[0] == '%if':
outcome = not a[1].startswith('%') # not replaced -> false
if_seq = True
rmidx_l.append(i)
rmidx_l.reverse()
for i in rmidx_l:
del self.all_post_gen[i]
def listtemplates():
l = []
for f in os.listdir(Template.tmpl_dir):
if os.path.isfile("%s/%s" % (Template.tmpl_dir,f)):
l.append(f)
return l
def listconfigs():
l = []
for f in os.listdir(Template.conf_dir):
if os.path.isfile("%s/%s" % (Template.conf_dir,f)):
l.append(f)
return l
def check_transition(inp,state,possible_l):
if not state in possible_l:
common_err("input (%s) in wrong state %s" % (inp,state))
return False
return True
class Template(object):
'''
Configuration templates.
'''
help_table = odict()
help_table["."] = ("","""
Configuration templates.
""")
help_table["new"] = ("create a new configuration from templates", "")
help_table["load"] = ("load a configuration", "")
help_table["delete"] = ("delete a configuration", "")
help_table["list"] = ("list configurations/templates", "")
help_table["apply"] = ("process and apply the current configuration to the current CIB", "")
help_table["show"] = ("show the processed configuration", "")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases
conf_dir = "%s/%s" % (os.getenv("HOME"),".crmconf")
# TODO: autoconf the source
tmpl_dir = "/usr/share/doc/packages/pacemaker/templates"
def __init__(self):
self.cmd_table = {
"new": (self.new,(2,),1,(null_list,templates_list,loop)),
"load": (self.load,(0,1),1,(config_list,)),
"edit": (self.edit,(0,1),1,(config_list,)),
"delete": (self.delete,(1,2),1,(config_list,)),
"show": (self.show,(0,1),0,(config_list,)),
"apply": (self.apply,(0,1),1,(config_list,)),
"list": (self.list,(0,1),0),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
setup_aliases(self)
self.init_dir()
self.curr_conf = ''
def init_dir(self):
'''Create the conf directory, link to templates'''
if not os.path.isdir(self.conf_dir):
try:
os.makedirs(self.conf_dir)
except os.error,msg:
common_err("makedirs: %s"%msg)
return
def get_depends(self,tmpl):
'''return a list of required templates'''
# Not used. May need it later.
try:
tf = open("%s/%s" % (self.tmpl_dir, tmpl),"r")
except os.error,msg:
common_err("open: %s"%msg)
return
l = []
for s in tf:
a = s.split()
if len(a) >= 2 and a[0] == '%depends_on':
l += a[1:]
tf.close()
return l
def replace_params(self,s,user_data):
change = False
for i in range(len(s)):
word = s[i]
for p in user_data:
# is parameter in the word?
pos = word.find('%' + p)
if pos < 0:
continue
endpos = pos + len('%' + p)
# and it isn't part of another word?
if re.match("[A-Za-z0-9]", word[endpos:endpos+1]):
continue
# if the value contains a space or
# it is a value of an attribute
# put quotes around it
if user_data[p].find(' ') >= 0 or word[pos-1:pos] == '=':
v = '"' + user_data[p] + '"'
else:
v = user_data[p]
word = word.replace('%' + p, v)
change = True # we did replace something
if change:
s[i] = word
if 'opt' in s:
if not change:
s = []
else:
s.remove('opt')
return s
def generate(self,l,user_data):
'''replace parameters (user_data) and generate output
'''
l2 = []
for piece in l:
piece2 = []
for s in piece:
s = self.replace_params(s,user_data)
if s:
piece2.append(' '.join(s))
if piece2:
l2.append(' \\\n\t'.join(piece2))
return '\n'.join(l2)
def process(self,config = ''):
'''Create a cli configuration from the current config'''
try:
f = open("%s/%s" % (self.conf_dir, config or self.curr_conf),'r')
except os.error,msg:
common_err("open: %s"%msg)
return ''
l = []
piece = []
user_data = {}
# states
START = 0; PFX = 1; DATA = 2; GENERATE = 3
state = START
global lineno
save_lineno = lineno
lineno = 0
rc = True
for inp in f:
lineno += 1
if inp.startswith('#'):
continue
if type(inp) == type(u''):
inp = inp.encode('ascii')
inp = inp.strip()
try:
s = shlex.split(inp)
except ValueError, msg:
common_err(msg)
continue
while '\n' in s:
s.remove('\n')
if not s:
if state == GENERATE and piece:
l.append(piece)
piece = []
elif s[0] in ("%name","%depends_on","%suggests"):
continue
elif s[0] == "%pfx":
if check_transition(inp,state,(START,DATA)) and len(s) == 2:
pfx = s[1]
state = PFX
elif s[0] == "%required":
if check_transition(inp,state,(PFX,)):
state = DATA
data_reqd = True
elif s[0] == "%optional":
if check_transition(inp,state,(PFX,DATA)):
state = DATA
data_reqd = False
elif s[0] == "%%":
if state != DATA:
common_warn("user data in wrong state %s" % state)
if len(s) < 2:
common_warn("parameter name missing")
elif len(s) == 2:
if data_reqd:
common_err("required parameter %s not set" % s[1])
rc = False
elif len(s) == 3:
user_data["%s:%s" % (pfx,s[1])] = s[2]
else:
common_err("%s: syntax error" % inp)
elif s[0] == "%generate":
if check_transition(inp,state,(DATA,)):
state = GENERATE
piece = []
elif state == GENERATE:
if s:
piece.append(s)
else:
common_err("<%s> unexpected" % inp)
if piece:
l.append(piece)
lineno = save_lineno
f.close()
if not rc:
return ''
return self.generate(l,user_data)
def new(self,cmd,name,*args):
"usage: new <config> <template> [<template> ...]"
if not is_filename_sane(name):
return False
if os.path.isfile("%s/%s" % (self.conf_dir, name)):
common_err("config %s exists; delete it first" % name)
return False
lt = LoadTemplate(name)
rc = True
for tmpl in args:
if not lt.load_template(tmpl):
rc = False
lt.post_process()
if rc and lt.write_config(name):
self.curr_conf = name
else:
return False
def config_exists(self,name):
if not is_filename_sane(name):
return False
if not os.path.isfile("%s/%s" % (self.conf_dir, name)):
common_err("%s: no such config" % name)
return False
return True
def delete(self,cmd,name,force = ''):
"usage: delete <config> [force]"
if force:
if force != "force" and force != "--force":
syntax_err((cmd,force), context = 'delete')
return False
if not self.config_exists(name):
return False
if name == self.curr_conf:
if not force:
common_err("%s: cannot remove current config (unless you force me)" % self.curr_conf)
return False
else:
self.curr_conf = ''
os.remove("%s/%s" % (self.conf_dir, name))
def load(self,cmd,name = ''):
"usage: load [<config>]"
if not name:
self.curr_conf = ''
return True
if not self.config_exists(name):
return False
self.curr_conf = name
def edit(self,cmd,name = ''):
"usage: edit [<config>]"
if not name and not self.curr_conf:
common_err("please load a config first")
return False
if name:
if not self.config_exists(name):
return False
edit_file("%s/%s" % (self.conf_dir, name))
else:
edit_file("%s/%s" % (self.conf_dir, self.curr_conf))
def show(self,cmd,name = ''):
"usage: show [<config>]"
if not name and not self.curr_conf:
common_err("please load a config first")
return False
if name:
if not self.config_exists(name):
return False
print self.process(name)
else:
print self.process()
def apply(self,cmd,name = ''):
"usage: apply [<config>]"
if not name and not self.curr_conf:
common_err("please load a config first")
return False
if name:
if not self.config_exists(name):
return False
s = self.process(name)
else:
s = self.process()
if not s:
return False
tmp = str2tmp(s)
if not tmp:
return False
set_obj = mkset_obj("NOOBJ")
set_obj.import_file("replace",tmp)
try: os.unlink(tmp)
except: pass
def list(self,cmd,templates = ''):
"usage: list [templates]"
if templates == "templates":
multicolumn(listtemplates())
else:
multicolumn(listconfigs())
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
def manage_attr(cmd,attr_ext_commands,*args):
if len(args) < 3:
bad_attr_usage(cmd,' '.join(args))
return False
attr_cmd = None
try:
attr_cmd = attr_ext_commands[args[1]]
except KeyError:
bad_attr_usage(cmd,' '.join(args))
return False
if not attr_cmd:
bad_attr_usage(cmd,' '.join(args))
return False
if args[1] == 'set':
if len(args) == 4:
if not is_name_sane(args[0]) \
or not is_name_sane(args[2]) \
or not is_value_sane(args[3]):
return False
return ext_cmd(attr_cmd%(args[0],args[2],args[3])) == 0
else:
bad_attr_usage(cmd,' '.join(args))
return False
elif args[1] in ('delete','show'):
if len(args) == 3:
if not is_name_sane(args[0]) \
or not is_name_sane(args[2]):
return False
return ext_cmd(attr_cmd%(args[0],args[2])) == 0
else:
bad_attr_usage(cmd,' '.join(args))
return False
else:
bad_attr_usage(cmd,' '.join(args))
return False
def resources_xml():
if wcache.is_cached("rsc_xml"):
return wcache.retrieve("rsc_xml")
doc = xml2doc("%s -o resources" % cib_dump)
if not doc:
return []
wcache.store("rsc_xml",doc)
def rsc2node(id):
if wcache.is_cached("rsc_%s_node" % id):
return wcache.retrieve("rsc_%s_node" % id)
doc = resources_xml()
if not doc:
return []
nodes = get_interesting_nodes(doc,[])
for n in nodes:
if is_resource(n) and n.getAttribute("id") == id:
return wcache.store("rsc_%s_node" % id, n)
def get_meta_param(id,param):
return get_stdin(RscMgmt.rsc_meta['show'] % (id,param), stderr_on = False)
def is_live_cib():
'''We working with the live cluster?'''
return cib_in_use or os.getenv("CIB_file")
def is_rsc_running(id):
if not is_live_cib():
return False
rsc_node = rsc2node(id)
if not rsc_node:
return False
if not is_resource(rsc_node):
return False
test_id = rsc_clone(id) or id
outp = get_stdin(RscMgmt.rsc_status % test_id, stderr_on = False)
return outp.find("running") > 0 and outp.find("NOT") == -1
def is_rsc_clone(rsc_id):
rsc_node = rsc2node(rsc_id)
return is_clone(rsc_node)
def is_rsc_ms(rsc_id):
rsc_node = rsc2node(rsc_id)
return is_ms(rsc_node)
def rsc_clone(rsc_id):
'''Get a clone of a resource.'''
rsc_node = rsc2node(rsc_id)
if not rsc_node or not rsc_node.parentNode:
return None
pnode = rsc_node.parentNode
if is_group(pnode):
pnode = pnode.parentNode
if is_clonems(pnode):
return pnode.getAttribute("id")
def is_process(s):
proc = subprocess.Popen("ps -e -o pid,command | grep -qs '%s'" % s, \
shell=True, stdout=subprocess.PIPE)
proc.wait()
return proc.returncode == 0
def cluster_stack():
if is_process("heartbeat:.[m]aster"):
return "heartbeat"
elif is_process("[a]isexec"):
return "openais"
return ""
def get_cloned_rsc(rsc_id):
rsc_node = rsc2node(rsc_id)
if not rsc_node:
return ""
for c in rsc_node.childNodes:
if is_child_rsc(c):
return c.getAttribute("id")
return ""
def get_max_clone(id):
v = get_meta_param(id,"clone-max")
try:
cnt = int(v)
except:
cnt = len(listnodes())
return cnt
def cleanup_resource(rsc,node):
if not is_name_sane(rsc) or not is_name_sane(node):
return False
if is_rsc_clone(rsc) or is_rsc_ms(rsc):
base = get_cloned_rsc(rsc)
if not base:
return False
clone_max = get_max_clone(rsc)
rc = True
for n in range(clone_max):
if ext_cmd(RscMgmt.rsc_cleanup % ("%s:%d" % (base,n), node)) != 0:
rc = False
else:
rc = ext_cmd(RscMgmt.rsc_cleanup%(rsc,node)) != 0
return rc
class RscMgmt(object):
'''
Resources management class
'''
rsc_status_all = "crm_resource -L"
rsc_status = "crm_resource -W -r '%s'"
rsc_showxml = "crm_resource -q -r '%s'"
rsc_startstop = "crm_resource --meta -r '%s' -p target-role -v '%s'"
rsc_manage = "crm_resource --meta -r '%s' -p is-managed -v '%s'"
rsc_migrate = "crm_resource -M -r '%s'"
rsc_migrateto = "crm_resource -M -r '%s' -H '%s'"
rsc_unmigrate = "crm_resource -U -r '%s'"
rsc_cleanup = "crm_resource -C -r '%s' -H '%s'"
rsc_param = {
'set': "crm_resource -r '%s' -p '%s' -v '%s'",
'delete': "crm_resource -r '%s' -d '%s'",
'show': "crm_resource -r '%s' -g '%s'",
}
rsc_meta = {
'set': "crm_resource --meta -r '%s' -p '%s' -v '%s'",
'delete': "crm_resource --meta -r '%s' -d '%s'",
'show': "crm_resource --meta -r '%s' -g '%s'",
}
rsc_failcount = {
'set': "crm_failcount -r '%s' -N '%s' -v '%s'",
'delete': "crm_failcount -r '%s' -N '%s' -D",
'show': "crm_failcount -r '%s' -N '%s' -G",
}
rsc_refresh = "crm_resource -R"
rsc_refresh_node = "crm_resource -R -H '%s'"
rsc_reprobe = "crm_resource -P"
rsc_reprobe_node = "crm_resource -P -H '%s'"
help_table = odict()
help_table["."] = ("","Resource management.")
help_table["status"] = ("show status of resources", "")
help_table["start"] = ("start a resource", "")
help_table["stop"] = ("stop a resource", "")
help_table["manage"] = ("put a resource into managed mode", "")
help_table["unmanage"] = ("put a resource into unmanaged mode", "")
help_table["migrate"] = ("migrate a resource to another node", "")
help_table["unmigrate"] = ("migrate a resource to its prefered node", "")
help_table["param"] = ("manage a parameter of a resource","""
Manage or display a parameter of a resource (also known as an
instance_attribute).
Usage:
param <rsc> set <param> <value>
param <rsc> delete <param>
param <rsc> show <param>
Example:
param ip_0 show ip
""")
help_table["meta"] = ("manage a meta attribute","""
Show/edit/delete a meta attribute of a resource. Currently, all
meta attributes of a resource may be managed with other commands
such as 'resource stop'.
Usage:
meta <rsc> set <attr> <value>
meta <rsc> delete <attr>
meta <rsc> show <attr>
Example:
meta ip_0 set target-role stopped
""")
help_table["failcount"] = ("manage failcounts", """
Show/edit/delete the failcount of a resource.
Usage:
failcount <rsc> set <node> <value>
failcount <rsc> delete <node>
failcount <rsc> show <node>
Example:
failcount fs_0 delete node2
""")
help_table["cleanup"] = ("cleanup resource status","")
help_table["refresh"] = ("refresh CIB from the LRM status","")
help_table["reprobe"] = ("probe for resources not started by the CRM","")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases.copy()
cmd_aliases.update({
"status": ("show","list",),
"migrate": ("move",),
"unmigrate": ("unmove",),
})
def __init__(self):
self.cmd_table = {
"status": (self.status,(0,1),0,(rsc_list,)),
"start": (self.start,(1,1),0,(rsc_list,)),
"stop": (self.stop,(1,1),0,(rsc_list,)),
"manage": (self.manage,(1,1),0,(rsc_list,)),
"unmanage": (self.unmanage,(1,1),0,(rsc_list,)),
"migrate": (self.migrate,(1,2),0,(rsc_list,nodes_list)),
"unmigrate": (self.unmigrate,(1,1),0,(rsc_list,)),
"param": (self.param,(3,4),1,(rsc_list,attr_cmds)),
"meta": (self.meta,(3,4),1,(rsc_list,attr_cmds)),
"failcount": (self.failcount,(3,4),0,(rsc_list,attr_cmds,nodes_list)),
"cleanup": (self.cleanup,(1,2),1,(rsc_list,nodes_list)),
"refresh": (self.refresh,(0,1),0,(nodes_list,)),
"reprobe": (self.reprobe,(0,1),0,(nodes_list,)),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
setup_aliases(self)
def status(self,cmd,rsc = None):
"usage: status [<rsc>]"
if rsc:
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_status % rsc) == 0
else:
return ext_cmd(self.rsc_status_all) == 0
def start(self,cmd,rsc):
"usage: start <rsc>"
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_startstop%(rsc,"Started")) == 0
def stop(self,cmd,rsc):
"usage: stop <rsc>"
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_startstop%(rsc,"Stopped")) == 0
def manage(self,cmd,rsc):
"usage: manage <rsc>"
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_manage%(rsc,"true")) == 0
def unmanage(self,cmd,rsc):
"usage: unmanage <rsc>"
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_manage%(rsc,"false")) == 0
def migrate(self,cmd,*args):
"""usage: migrate <rsc> [<node>]"""
if not is_name_sane(args[0]):
return False
if len(args) == 1:
return ext_cmd(self.rsc_migrate%args[0]) == 0
else:
if not is_name_sane(args[1]):
return False
return ext_cmd(self.rsc_migrateto%(args[0],args[1])) == 0
def unmigrate(self,cmd,rsc):
"usage: unmigrate <rsc>"
if not is_name_sane(rsc):
return False
return ext_cmd(self.rsc_unmigrate%rsc) == 0
def cleanup(self,cmd,*args):
"usage: cleanup <rsc> [<node>]"
# Cleanup a resource on a node. Omit node to cleanup on
# all live nodes.
if len(args) == 2: # remove
return cleanup_resource(args[0],args[1])
else:
rv = True
for n in listnodes():
if not cleanup_resource(args[0],n):
rv = False
return rv
def failcount(self,cmd,*args):
"""usage:
failcount <rsc> set <node> <value>
failcount <rsc> delete <node>
failcount <rsc> show <node>"""
d = lambda: manage_attr(cmd,self.rsc_failcount,*args)
return d()
def param(self,cmd,*args):
"""usage:
param <rsc> set <param> <value>
param <rsc> delete <param>
param <rsc> show <param>"""
d = lambda: manage_attr(cmd,self.rsc_param,*args)
return d()
def meta(self,cmd,*args):
"""usage:
meta <rsc> set <attr> <value>
meta <rsc> delete <attr>
meta <rsc> show <attr>"""
d = lambda: manage_attr(cmd,self.rsc_meta,*args)
return d()
def refresh(self,cmd,*args):
'usage: refresh [<node>]'
if len(args) == 1:
if not is_name_sane(args[0]):
return False
return ext_cmd(self.rsc_refresh_node%args[0]) == 0
else:
return ext_cmd(self.rsc_refresh) == 0
def reprobe(self,cmd,*args):
'usage: reprobe [<node>]'
if len(args) == 1:
if not is_name_sane(args[0]):
return False
return ext_cmd(self.rsc_reprobe_node%args[0]) == 0
else:
return ext_cmd(self.rsc_reprobe) == 0
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
def print_node(uname,id,type,other,inst_attr):
"""
Try to pretty print a node from the cib. Sth like:
uname(id): type
attr1: v1
attr2: v2
"""
if uname == id:
print "%s: %s" % (uname,type)
else:
print "%s(%s): %s" % (uname,id,type)
for a in other:
print "\t%s: %s" % (a,other[a])
for a,v in inst_attr:
print "\t%s: %s" % (a,v)
class NodeMgmt(object):
'''
Nodes management class
'''
node_standby = "crm_standby -N '%s' -v '%s'"
node_delete = "cibadmin -D -o nodes -X '<node uname=\"%s\"/>'"
hb_delnode = "@libdir@/heartbeat/hb_delnode '%s'"
dc = "crmadmin -D"
node_attr = {
'set': "crm_attribute -t nodes -U '%s' -n '%s' -v '%s'",
'delete': "crm_attribute -D -t nodes -U '%s' -n '%s'",
'show': "crm_attribute -G -t nodes -U '%s' -n '%s'",
}
node_status = {
'set': "crm_attribute -t status -U '%s' -n '%s' -v '%s'",
'delete': "crm_attribute -D -t status -U '%s' -n '%s'",
'show': "crm_attribute -G -t status -U '%s' -n '%s'",
}
help_table = odict()
help_table["."] = ("","Nodes management.")
help_table["show"] = ("show node", "")
help_table["standby"] = ("put node into standby", "")
help_table["online"] = ("bring node online", "")
help_table["delete"] = ("delete node", "")
help_table["attribute"] = ("manage attributes", """
Edit node attributes. This kind of attribute should refer to
relatively static properties, such as memory size.
Usage:
attribute <node> set <attr> <value>
attribute <node> delete <attr>
attribute <node> show <attr>
Example:
attribute node_1 set memory_size 4096
""")
help_table["status-attr"] = ("manage status attributes", """
Edit node attributes which are in the CIB status section, i.e.
attributes which hold properties of a more volatile nature. One
typical example is attribute generated by the 'pingd' utility.
Usage:
...............
status-attr <node> set <attr> <value>
status-attr <node> delete <attr>
status-attr <node> show <attr>
...............
Example:
...............
status-attr node_1 show pingd
""")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases.copy()
cmd_aliases.update({
"show": ("list",),
})
def __init__(self):
self.cmd_table = {
"status": (self.status,(0,1),0,(nodes_list,)),
"show": (self.show,(0,1),0,(nodes_list,)),
"standby": (self.standby,(0,1),0,(nodes_list,)),
"online": (self.online,(0,1),0,(nodes_list,)),
"delete": (self.delete,(1,1),0,(nodes_list,)),
"attribute": (self.attribute,(3,4),0,(nodes_list,attr_cmds)),
"status-attr": (self.status_attr,(3,4),0,(nodes_list,attr_cmds)),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
setup_aliases(self)
def status(self,cmd,node = None):
'usage: status [<node>]'
return ext_cmd("%s -o nodes"%cib_dump) == 0
def show(self,cmd,node = None):
'usage: show [<node>]'
doc = xml2doc("%s -o nodes"%cib_dump)
if not doc:
return False
nodes_node = get_conf_elem(doc, "nodes")
if not nodes_node:
return False
for c in nodes_node.childNodes:
if not is_element(c) or c.tagName != "node":
continue
if node and c.getAttribute("uname") != node:
continue
type = uname = id = ""
other = inst_attr = []
for attr in c.attributes.keys():
v = c.getAttribute(attr)
if attr == "type":
type = v
elif attr == "uname":
uname = v
elif attr == "id":
id = v
else:
other[attr] = v
for c2 in c.childNodes:
if not is_element(c2):
continue
if c2.tagName == "instance_attributes":
inst_attr = nvpairs2list(c2)
print_node(uname,id,type,other,inst_attr)
def standby(self,cmd,node = None):
'usage: standby [<node>]'
if not node:
node = this_node
if not is_name_sane(node):
return False
return ext_cmd(self.node_standby%(node,"on")) == 0
def online(self,cmd,node = None):
'usage: online [<node>]'
if not node:
node = this_node
if not is_name_sane(node):
return False
return ext_cmd(self.node_standby%(node,"off")) == 0
def delete(self,cmd,node):
'usage: delete <node>'
if not is_name_sane(node):
return False
rv = True
if cluster_stack() == "heartbeat":
rv = ext_cmd(self.hb_delnode%node) == 0
if rv:
rv = ext_cmd(self.node_delete%node) == 0
return rv
def attribute(self,cmd,*args):
"""usage:
attribute <node> set <rsc> <value>
attribute <node> delete <rsc>
attribute <node> show <rsc>"""
d = lambda: manage_attr(cmd,self.node_attr,*args)
return d()
def status_attr(self,cmd,*args):
"""usage:
status-attr <node> set <rsc> <value>
status-attr <node> delete <rsc>
status-attr <node> show <rsc>"""
d = lambda: manage_attr(cmd,self.node_status,*args)
return d()
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
def edit_file(fname):
'Edit a file.'
if not fname:
return
if not user_prefs.editor:
return
return ext_cmd("%s %s" % (user_prefs.editor,fname))
def page_string(s):
'Write string through a pager.'
if not s:
return
w,h = get_winsize()
if s.count('\n') <= h:
print s
elif not user_prefs.pager or not interactive:
print s
else:
opts = ""
if user_prefs.pager == "less":
opts = "-R"
pipe_string("%s %s" % (user_prefs.pager,opts), s)
def lines2cli(s):
'''
Convert a string into a list of lines. Replace continuation
characters. Strip white space, left and right. Drop empty lines.
'''
cl = []
l = s.split('\n')
cum = []
for p in l:
p = p.strip()
if p.endswith('\\'):
p = p.rstrip('\\')
cum.append(p)
else:
cum.append(p)
cl.append(''.join(cum).strip())
cum = []
if cum: # in case s ends with backslash
cl.append(''.join(cum))
return [x for x in cl if x]
def get_winsize():
try:
import curses
curses.setupterm()
w = curses.tigetnum('cols')
h = curses.tigetnum('lines')
except:
try:
w = os.environ['COLS']
h = os.environ['LINES']
except:
w = 80; h = 25
return w,h
def multicolumn(l):
'''
A ls-like representation of a list of strings.
A naive approach.
'''
min_gap = 2
w,h = get_winsize()
max_len = 8
for s in l:
if len(s) > max_len:
max_len = len(s)
cols = w/(max_len + min_gap) # approx.
col_len = w/cols
for i in range(len(l)/cols + 1):
s = ''
for j in range(i*cols,(i+1)*cols):
if not j < len(l):
break
if not s:
s = "%-*s" % (col_len,l[j])
elif (j+1)%cols == 0:
s = "%s%s" % (s,l[j])
else:
s = "%s%-*s" % (s,col_len,l[j])
if s:
print s
class RA(object):
'''
CIB shadow management class
'''
help_table = odict()
help_table["."] = ("","""
Resource Agents (RA) lists and documentation.
""")
help_table["classes"] = ("list classes and providers", """
Print all resource agents' classes and, where appropriate, a list
of available providers.
Usage:
...............
classes
...............
""")
help_table["list"] = ("list RA for a class (and provider)", """
List available resource agents for the given class. If the class
is `ocf`, supply a provider to get agents which are available
only from that provider.
Usage:
...............
list <class> [<provider>]
...............
Example:
...............
list ocf pacemaker
...............
""")
help_table["meta"] = ("show meta data for a RA", """
Show the meta-data of a resource agent type. This is where users
can find information on how to use a resource agent.
Usage:
...............
meta <type> <class> [<provider>]
...............
Example:
...............
meta apache ocf
meta ipmilan stonith
...............
""")
help_table["providers"] = ("show providers for a RA", """
List providers for a resource agent type.
Usage:
...............
providers <type>
...............
Example:
...............
providers apache
...............
""")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
provider_classes = ["ocf"]
cmd_aliases = global_aliases.copy()
cmd_aliases.update({
"meta": ("info",),
})
def __init__(self):
self.cmd_table = {
"classes": (self.classes,(0,0),0),
"list": (self.list,(1,2),1),
"providers": (self.providers,(1,1),1),
"meta": (self.meta,(2,3),1),
"help": (self.help,(0,1),0),
"quit": (cmd_exit,(0,0),0),
"end": (cmd_end,(0,1),0),
}
setup_aliases(self)
def classes(self,cmd):
"usage: classes"
for c in ra_classes():
if c in self.provider_classes:
print "%s / %s" % (c,' '.join(ra_providers_all(c)))
else:
print "%s" % c
def providers(self,cmd,ra_type):
"usage: providers <ra>"
print ' '.join(ra_providers(ra_type))
def list(self,cmd,c,p = None):
"usage: list <class> [<provider>]"
if not c in ra_classes():
common_err("class %s does not exist" % c)
return False
if p and not p in ra_providers_all(c):
common_err("there is no provider %s for class %s" % (p,c))
return False
if regression_tests:
for t in ra_types(c,p):
print t
else:
multicolumn(ra_types(c,p))
def meta(self,cmd,ra_type,ra_class,ra_provider = "heartbeat"):
"usage: meta <ra> <class> [<provider>]"
ra = RAInfo(ra_class,ra_type,ra_provider)
try:
page_string(ra.meta_pretty())
except:
return False
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
class CibConfig(object):
'''
The configuration class
'''
help_table = odict()
help_table["."] = ("","CIB configuration.")
help_table["verify"] = ("verify the CIB with crm_verify", "Verify the CIB with crm_verify")
help_table["erase"] = ("erase the CIB", """
Erase the CIB (or nodes)
Erase removes all objects but nodes from the shell. All changes
are lost. To remove just nodes, add 'nodes' as parameter. Note
that removing nodes from the live cluster may have some
strange/interesting/unwelcome effects.
Usage:
...............
erase [nodes]
...............
""")
help_table["ptest"] = ("show cluster actions if changes were committed", """
Show PE (policy engine) motions using ptest.
A CIB is constructed using the current user edited version and
the status from the current CIB. This CIB is run through ptest
to show changes. If you have graphviz installed and X11 session,
dotty is run to display the changes graphically.
""")
help_table["refresh"] = ("refresh from CIB", """
Load the CIB from scratch. All changes are lost. The user is
asked for confirmation beforehand
""")
help_table["show"] = ("display CIB objects", """
The `show` command displays objects. It may display all objects
or a set of objects. Specify 'changed' to see what changed.
Usage:
...............
show [xml] [<id> ...]
show [xml] changed
...............
""")
help_table["edit"] = ("edit CIB objects", """
This command invokes the editor with the object description. As
with the `show` command, the user may choose to edit all objects
or a set of objects.
If the user insists, he or she may edit the XML edition of the
object.
Usage:
...............
edit [xml] [<id> ...]
edit [xml] changed
...............
""")
help_table["delete"] = ("delete CIB objects", """
The user may delete one or more objects by specifying a list of
ids. If the object to be deleted belongs to a container object,
such as group, and it is the only resource in that container,
then the container is deleted as well.
Usage:
...............
delete <id> [<id> ...]
...............
""")
help_table["rename"] = ("rename a CIB object", """
Rename an object. It is recommended to use this command to rename
a resource, because it will take care of updating all related
constraints. Changing ids with the edit command won't have the
same effect.
If you want to rename a resource, it must be stopped.
Usage:
...............
rename <old_id> <new_id>
...............
""")
help_table["save"] = ("save the CIB to a file", """
Save the configuration to a file. Optionally, as XML.
Usage:
...............
save [xml] <file>
...............
Example:
...............
save myfirstcib.txt
...............
""")
help_table["load"] = ("import the CIB from a file", """
Load a part of configuration (or all of it) from a local file or
a network URL. The `replace` method replaces the current
configuration with the one from the source. The `update` tries to
import the contents into the current configuration. The file may
be a CLI file or an XML file.
Usage:
...............
load [xml] method URL
method :: replace | update
...............
Example:
...............
load xml replace myfirstcib.xml
load xml replace http://storage.big.com/cibs/bigcib.xml
...............
""")
help_table["template"] = ("edit and import a configuration from a template", """
The specified template is loaded into the editor. It's up to the
user to make a good CRM configuration out of it.
Usage:
...............
template [xml] url
...............
Example:
...............
template two-apaches.txt
...............
""")
help_table["commit"] = ("commit the changes to the CIB", """
The changes at the configure level are not immediately applied to
the CIB, but by this command or on exiting the configure level.
Sometimes, the program will refuse to apply the changes, usually
for good reason. If you know what you're doing, you may say
'commit force' to force the changes.
""")
help_table["upgrade"] = ("upgrade the CIB to version 1.0", """
If you get the "CIB not supported" error, which typically means
that the current CIB version is coming from the older release,
you may try to upgrade it to the latest revision. The command
used is:
cibadmin --upgrade --force
If we don't recognize the current CIB as the old one, but you're
sure that it is, you may force the command.
Usage:
...............
upgrade [force]
...............
""")
help_table["node"] = ("define a cluster node", """
The node command describes a cluster node. Nodes in the CIB are
commonly created automatically by the CRM. Hence, you should not
need to do this yourself unless you also want to define node
attributes. Note that it is also possible to manage node
attributes at the `node` level.
Usage:
...............
node <uname>[:<type>]
[attributes <param>=<value> [<param>=<value>...]]
type :: normal | member | ping
...............
Example:
...............
node node1
node big_node attributes memory=64
...............
""")
help_table["primitive"] = ("define a resource", """
The primitive command describes a resource.
Usage:
...............
primitive <rsc> [<class>:[<provider>:]]<type>
[params attr_list]
[meta attr_list]
[operations id_spec]
[op op_type [<attribute>=<value>...] ...]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
id_spec :: $id=<id> | $id-ref=<id>
op_type :: start | stop | monitor
...............
Example:
...............
primitive apcfence stonith:apcsmart \\
params ttydev=/dev/ttyS0 hostlist="node1 node2" \\
op start timeout=60s \\
op monitor interval=30m timeout=60s
primitive www8 apache \\
params configfile=/etc/apache/www8.conf \\
operations $id-ref=apache_ops
primitive db0 mysql \\
params config=/etc/mysql/db0.conf \\
op monitor interval=60s \\
op monitor interval=300s OCF_CHECK_LEVEL=10
...............
""")
help_table["group"] = ("define a group", """
The `group` command creates a group of resources.
Usage:
...............
group <name> <rsc> [<rsc>...]
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
group internal_www disk0 fs0 internal_ip apache \\
meta target-role=stopped
...............
""")
help_table["clone"] = ("define a clone", """
The `clone` command creates a resource clone. It may contain a
single primitive resource or one group of resources.
Usage:
...............
clone <name> <rsc>
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
clone cl_fence apc_1 \\
meta clone-node-max=1 globally-unique=false
...............
""")
help_table["ms"] = ("define a master-slave resource", """
The `ms` command creates a master/slave resource type. It may contain a
single primitive resource or one group of resources.
Usage:
...............
ms <name> <rsc>
[meta attr_list]
[params attr_list]
attr_list :: [$id=<id>] <attr>=<val> [<attr>=<val>...] | $id-ref=<id>
...............
Example:
...............
ms disk1 drbd1 \\
meta notify=true globally-unique=false
...............
""")
help_table["location"] = ("a location preference", """
`location` defines the preference of nodes for the given
resource. The location constraints consist of one or more rules
which specify a score to be awarded if the rule matches.
Usage:
...............
location <id> <rsc> {node_pref|rules}
node_pref :: <score>: <node>
rules ::
rule [id_spec] [$role=<role>] <score>: <expression>
[rule [id_spec] [$role=<role>] <score>: <expression> ...]
id_spec :: $id=<id> | $id-ref=<id>
score :: <number> | <attribute> | [-]inf
- expression :: <single_exp> [bool_op <simple_exp> ...]
- | <date_expr>
+ expression :: <simple_exp> [bool_op <simple_exp> ...]
bool_op :: or | and
- single_exp :: <attribute> [type:]<binary_op> <value>
+ simple_exp :: <attribute> [type:]<binary_op> <value>
| <unary_op> <attribute>
+ | date <date_expr>
type :: string | version | number
binary_op :: lt | gt | lte | gte | eq | ne
unary_op :: defined | not_defined
- date_expr :: date_op <start> [<end>] (TBD)
+ date_expr :: lt <end>
+ | gt <start>
+ | in_range [start=<start>] [end=<end>]
+ | in_range start=<start> <duration>
+ | date_spec <date_spec>
+ duration|date_spec ::
+ hours=<value>
+ | monthdays=<value>
+ | weekdays=<value>
+ | yearsdays=<value>
+ | months=<value>
+ | weeks=<value>
+ | years=<value>
+ | weekyears=<value>
+ | moon=<value>
...............
Examples:
...............
location conn_1 internal_www 100: node1
location conn_1 internal_www \\
rule 100: #uname eq node1 \\
rule pingd: defined pingd
location conn_2 dummy_float \\
rule -inf: not_defined pingd or pingd lte 0
...............
""")
help_table["colocation"] = ("colocate resources", """
This constraint expresses the placement relation between two
resources.
Usage:
...............
colocation <id> <score>: <rsc>[:<role>] <rsc>[:<role>]
...............
Example:
...............
colocation dummy_and_apache -inf: apache dummy
...............
""")
help_table["order"] = ("order resources", """
This constraint expresses the order of actions on two resources.
Usage:
...............
order <id> score-type: <first-rsc>[:<action>] <then-rsc>[:<action>]
[symmetrical=<bool>]
score-type :: advisory | mandatory | <score>
...............
Example:
...............
order c_apache_1 mandatory: apache:start ip_1
...............
""")
help_table["property"] = ("set a cluster property", """
Set the cluster (`crm_config`) options.
Usage:
...............
property [$id=<set_id>]
<option>=<value> [<option>=<value>...]
...............
Example:
...............
property stonith-enabled=true
...............
""")
help_table["rsc_defaults"] = ("set resource defaults", """
Set defaults for the resource meta attributes.
Usage:
...............
rsc_defaults [$id=<set_id>]
<option>=<value> [<option>=<value>...]
...............
Example:
...............
rsc_defaults failure-timeout=3m
...............
""")
help_table["op_defaults"] = ("set resource operations defaults", """
Set defaults for the operations meta attributes.
Usage:
...............
op_defaults [$id=<set_id>]
<option>=<value> [<option>=<value>...]
...............
Example:
...............
op_defaults record-pending=true
...............
""")
help_table["monitor"] = ("add monitor operation to a primitive", """
Add monitor operation to a primitive.
Usage:
...............
monitor <rsc>[:<role>] <interval>[:<timeout>]
...............
Example:
...............
monitor apcfence 60m:60s
...............
""")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases.copy()
cmd_aliases.update({
"colocation": ("collocation",),
"ms": ("master",),
})
def __init__(self):
self.cmd_table = {
"erase": (self.erase,(0,1),1),
"verify": (self.verify,(0,0),1),
"refresh": (self.refresh,(0,0),1),
"ptest": (self.ptest,(0,0),1),
"commit": (self.commit,(0,1),1),
"upgrade": (self.upgrade,(0,1),1),
"show": (self.show,(0,),1,(id_xml_list,id_list,loop)),
"edit": (self.edit,(0,),1,(id_xml_list,id_list,loop)),
"delete": (self.delete,(1,),1,(id_list,loop)),
"rename": (self.rename,(2,2),1,(id_list,)),
"save": (self.save,(1,2),1),
"load": (self.load,(2,3),1),
"node": (self.conf_node,(1,),1),
"primitive": (self.conf_primitive,(2,),1,(null_list, \
ra_classes_list, primitive_complete_complex, loop)),
"group": (self.conf_group,(2,),1,(null_list,f_prim_id_list,loop)),
"clone": (self.conf_clone,(2,),1,(null_list,f_children_id_list)),
"ms": (self.conf_ms,(2,),1,(null_list,f_children_id_list)),
"location": (self.conf_location,(2,),1,(null_list,rsc_id_list)),
"colocation": (self.conf_colocation,(2,),1,(null_list,null_list,rsc_id_list,rsc_id_list)),
"order": (self.conf_order,(2,),1,(null_list,null_list,rsc_id_list,rsc_id_list)),
"property": (self.conf_property,(1,),1,(property_complete,loop)),
"rsc_defaults": (self.conf_rsc_defaults,(1,),1),
"op_defaults": (self.conf_op_defaults,(1,),1),
"monitor": (self.conf_monitor,(2,2),1),
"ra": RA,
"cib": CibShadow,
"template": Template,
"help": (self.help,(0,1),1),
"end": (self.end,(0,1),1),
"quit": (self.exit,(0,0),1),
"_test": (self.check_structure,(0,0),1),
"_regtest": (self.regression_testing,(1,1),1),
}
setup_aliases(self)
if not build_completions:
cib_factory.initialize()
def myname(self):
'''Just return some id.'''
return "cibconfig"
def check_structure(self,cmd):
return cib_factory.check_structure()
def regression_testing(self,cmd,param):
return cib_factory.regression_testing(param)
def show(self,cmd,*args):
"usage: show [xml] [<id>...]"
if not cib_factory.is_cib_sane():
return False
err_buf.buffer() # keep error messages
set_obj = mkset_obj(*args)
err_buf.release() # show them, but get an ack from the user
return set_obj.show()
def edit(self,cmd,*args):
"usage: edit [xml] [<id>...]"
if not cib_factory.is_cib_sane():
return False
err_buf.buffer() # keep error messages
set_obj = mkset_obj(*args)
err_buf.release() # show them, but get an ack from the user
return set_obj.edit()
def verify(self,cmd):
"usage: verify"
if not cib_factory.is_cib_sane():
return False
set_obj = mkset_obj("xml")
return set_obj.verify()
def save(self,cmd,*args):
"usage: save [xml] <filename>"
if not cib_factory.is_cib_sane():
return False
if args[0] == "xml":
f = args[1]
set_obj = mkset_obj("xml")
else:
f = args[0]
set_obj = mkset_obj()
return set_obj.save_to_file(f)
def load(self,cmd,*args):
"usage: load [xml] {replace|update} {<url>|<path>}"
if not cib_factory.is_cib_sane():
return False
if args[0] == "xml":
if len(args) != 3:
syntax_err(args, context = 'load')
return False
url = args[2]
method = args[1]
set_obj = mkset_obj("xml","NOOBJ")
else:
if len(args) != 2:
syntax_err(args, context = 'load')
return False
url = args[1]
method = args[0]
set_obj = mkset_obj("NOOBJ")
return set_obj.import_file(method,url)
def delete(self,cmd,*args):
"usage: delete <id> [<id>...]"
if not cib_factory.is_cib_sane():
return False
return cib_factory.delete(*args)
def rename(self,cmd,old_id,new_id):
"usage: rename <old_id> <new_id>"
if not cib_factory.is_cib_sane():
return False
return cib_factory.rename(old_id,new_id)
def erase(self,cmd,nodes = None):
"usage: erase [nodes]"
if not cib_factory.is_cib_sane():
return False
if nodes:
if nodes == "nodes":
return cib_factory.erase_nodes()
else:
syntax_err((cmd,nodes), context = 'erase')
else:
return cib_factory.erase()
def refresh(self,cmd):
"usage: refresh"
if not cib_factory.is_cib_sane():
return False
if interactive and cib_factory.has_cib_changed():
if not ask("All changes will be dropped. Do you want to proceed?"):
return
cib_factory.refresh()
def ptest(self,cmd):
"usage: ptest"
if not cib_factory.is_cib_sane():
return False
set_obj = mkset_obj("xml")
return set_obj.ptest()
def commit(self,cmd,force = None):
"usage: commit [force]"
if not cib_factory.is_cib_sane():
return False
if not cib_factory.has_cib_changed():
common_info("apparently there is nothing to commit")
common_info("try changing something first")
return
wcache.clear()
if not force:
if not self.verify("verify"):
common_warn("crm_verify(8) found errors in the CIB")
common_info("use commit force if you know what you are doing")
return False
else:
return cib_factory.commit()
elif force == "force":
return cib_factory.commit(True)
else:
syntax_err((cmd,force))
return False
def upgrade(self,cmd,force = None):
"usage: upgrade [force]"
if not cib_factory.is_cib_sane():
return False
if not force:
return cib_factory.upgrade_cib_06to10()
elif force == "force":
return cib_factory.upgrade_cib_06to10(True)
else:
syntax_err((cmd,force))
return False
def __conf_object(self,cmd,*args):
"The configure object command."
if not cib_factory.is_cib_sane():
return False
f = lambda: cib_factory.create_object(cmd,*args)
return f()
def conf_node(self,cmd,*args):
"""usage: node <uname>[:<type>]
[attributes <param>=<value> [<param>=<value>...]]"""
return self.__conf_object(cmd,*args)
def conf_primitive(self,cmd,*args):
"""usage: primitive <rsc> [<class>:[<provider>:]]<type>
[params <param>=<value> [<param>=<value>...]]
[meta <attribute>=<value> [<attribute>=<value>...]]
[operations id_spec
[op op_type [<attribute>=<value>...] ...]]"""
return self.__conf_object(cmd,*args)
def conf_group(self,cmd,*args):
"""usage: group <name> <rsc> [<rsc>...]
[params <param>=<value> [<param>=<value>...]]
[meta <attribute>=<value> [<attribute>=<value>...]]"""
return self.__conf_object(cmd,*args)
def conf_clone(self,cmd,*args):
"""usage: clone <name> <rsc>
[params <param>=<value> [<param>=<value>...]]
[meta <attribute>=<value> [<attribute>=<value>...]]"""
return self.__conf_object(cmd,*args)
def conf_ms(self,cmd,*args):
"""usage: ms <name> <rsc>
[params <param>=<value> [<param>=<value>...]]
[meta <attribute>=<value> [<attribute>=<value>...]]"""
return self.__conf_object(cmd,*args)
def conf_location(self,cmd,*args):
"""usage: location <id> <rsc> {node_pref|rules}
node_pref :: <score>: <node>
rules ::
rule [id_spec] [$role=<role>] <score>: <expression>
[rule [id_spec] [$role=<role>] <score>: <expression> ...]
- id_spec :: $id=<id> | $id-ref=<id>"""
+ id_spec :: $id=<id> | $id-ref=<id>
+ score :: <number> | <attribute> | [-]inf
+ expression :: <simple_exp> [bool_op <simple_exp> ...]
+ bool_op :: or | and
+ simple_exp :: <attribute> [type:]<binary_op> <value>
+ | <unary_op> <attribute>
+ | date <date_expr>
+ type :: string | version | number
+ binary_op :: lt | gt | lte | gte | eq | ne
+ unary_op :: defined | not_defined"""
return self.__conf_object(cmd,*args)
def conf_colocation(self,cmd,*args):
"""usage: colocation <id> <score>: <rsc>[:<role>] <rsc>[:<role>]
"""
return self.__conf_object(cmd,*args)
def conf_order(self,cmd,*args):
"""usage: order <id> score-type: <first-rsc>[:<action>] <then-rsc>[:<action>]
[symmetrical=<bool>]"""
return self.__conf_object(cmd,*args)
def conf_property(self,cmd,*args):
"usage: property [$id=<set_id>] <option>=<value>"
return self.__conf_object(cmd,*args)
def conf_rsc_defaults(self,cmd,*args):
"usage: rsc_defaults [$id=<set_id>] <option>=<value>"
return self.__conf_object(cmd,*args)
def conf_op_defaults(self,cmd,*args):
"usage: op_defaults [$id=<set_id>] <option>=<value>"
return self.__conf_object(cmd,*args)
def conf_monitor(self,cmd,*args):
"usage: monitor <rsc>[:<role>] <interval>[:<timeout>]"
return self.__conf_object(cmd,*args)
def end_game(self, no_questions_asked = False):
if cib_factory.has_cib_changed():
if no_questions_asked or not interactive or \
ask("There are changes pending. Do you want to commit them?"):
cib_factory.commit()
cib_factory.reset()
wcache.clear()
def end(self,cmd,dir = ".."):
"usage: end"
self.end_game()
cmd_end(cmd,dir)
def help(self,cmd,topic = ''):
"usage: help [<topic>]"
cmd_help(self.help_table,topic)
def exit(self,cmd):
"usage: exit"
self.end_game()
cmd_exit(cmd)
attr_defaults_missing = {
}
def add_missing_attr(node):
try:
for defaults in attr_defaults_missing[node.tagName]:
if not node.hasAttribute(defaults[0]):
node.setAttribute(defaults[0],defaults[1])
except: pass
attr_defaults = {
"rule": (("boolean-op","and"),),
"expression": (("type","string"),),
}
def drop_attr_defaults(node, ts = 0):
try:
for defaults in attr_defaults[node.tagName]:
if node.getAttribute(defaults[0]) == defaults[1]:
node.removeAttribute(defaults[0])
except: pass
def is_element(xmlnode):
return xmlnode and xmlnode.nodeType == xmlnode.ELEMENT_NODE
def nameandid(xmlnode,level):
if xmlnode.nodeType == xmlnode.ELEMENT_NODE:
print level*' ',xmlnode.tagName,xmlnode.getAttribute("id"),xmlnode.getAttribute("name")
def xmltraverse(xmlnode,fun,ts=0):
for c in xmlnode.childNodes:
if is_element(c):
fun(c,ts)
xmltraverse(c,fun,ts+1)
def xmltraverse_thin(xmlnode,fun,ts=0):
'''
Skip elements which may be resources themselves.
NB: Call this only on resource (or constraint) nodes, but
never on cib or configuration!
'''
for c in xmlnode.childNodes:
if is_element(c) and not c.tagName in ('primitive','group'):
xmltraverse_thin(c,fun,ts+1)
fun(xmlnode,ts)
def xml_processnodes(xmlnode,node_filter,proc):
'''
Process with proc all nodes that match filter.
'''
node_list = []
for child in xmlnode.childNodes:
if node_filter(child):
node_list.append(child)
if child.hasChildNodes():
xml_processnodes(child,node_filter,proc)
if node_list:
proc(node_list)
# filter the cib
def is_whitespace(node):
return node.nodeType == node.TEXT_NODE and not node.data.strip()
def is_comment(node):
return node.nodeType == node.COMMENT_NODE
def is_status_node(node):
return is_element(node) and node.tagName == "status"
container_tags = ("group", "clone", "ms", "master")
clonems_tags = ("clone", "ms", "master")
resource_tags = ("primitive","group","clone","ms","master")
constraint_tags = ("rsc_location","rsc_colocation","rsc_order")
constraint_rsc_refs = ("rsc","with-rsc","first","then")
children_tags = ("group", "primitive")
nvpairs_tags = ("meta_attributes", "instance_attributes")
defaults_tags = ("rsc_defaults","op_defaults")
def is_emptynvpairs(node):
return is_element(node) \
and node.tagName in nvpairs_tags \
and not node.hasChildNodes()
def is_group(node):
return is_element(node) \
and node.tagName == "group"
def is_ms(node):
return is_element(node) \
and node.tagName in ("master","ms")
def is_clone(node):
return is_element(node) \
and node.tagName == "clone"
def is_clonems(node):
return is_element(node) \
and node.tagName in clonems_tags
def is_container(node):
return is_element(node) \
and node.tagName in container_tags
def is_primitive(node):
return is_element(node) \
and node.tagName == "primitive"
def is_resource(node):
return is_element(node) \
and node.tagName in resource_tags
def is_child_rsc(node):
return is_element(node) \
and node.tagName in children_tags
def is_constraint(node):
return is_element(node) \
and node.tagName in constraint_tags
def is_defaults(node):
return is_element(node) \
and node.tagName in defaults_tags
def rsc_constraint(rsc_id,cons_node):
if not is_element(cons_node):
return False
for attr in cons_node.attributes.keys():
if attr in constraint_rsc_refs \
and rsc_id == cons_node.getAttribute(attr):
return True
return False
resource_cli_names = ("primitive","group","clone","ms","master")
constraint_cli_names = ("location","colocation","collocation","order")
def is_resource_cli(s):
return s in resource_cli_names
def is_constraint_cli(s):
return s in constraint_cli_names
def sort_container_children(node_list):
'''
Make sure that attributes's nodes are first, followed by the
elements (primitive/group). The order of elements is not
disturbed, they are just shifted to end!
'''
for node in node_list:
children = []
for c in node.childNodes:
if is_element(c) and c.tagName in children_tags:
children.append(c)
for c in children:
node.removeChild(c)
for c in children:
node.appendChild(c)
def rmnodes(node_list):
for node in node_list:
node.parentNode.removeChild(node)
node.unlink()
def printid(node_list):
for node in node_list:
id = node.getAttribute("id")
if id: print "node id:",id
def sanitize_cib(doc):
xml_processnodes(doc,is_status_node,rmnodes)
#xml_processnodes(doc,is_element,printid)
#xml_processnodes(doc,is_emptynvpairs,rmnodes)
xml_processnodes(doc,is_whitespace,rmnodes)
xml_processnodes(doc,is_comment,rmnodes)
xml_processnodes(doc,is_container,sort_container_children)
xmltraverse(doc,drop_attr_defaults)
def rename_id(node,old_id,new_id):
if node.getAttribute("id") == old_id:
node.setAttribute("id", new_id)
def rename_rscref(c_node,old_id,new_id):
for attr in c_node.attributes.keys():
if attr in constraint_rsc_refs and \
c_node.getAttribute(attr) == old_id:
c_node.setAttribute(attr, new_id)
def silly_constraint(c_node,rsc_id):
'Remove a constraint from rsc_id to rsc_id.'
cnt = 0
for attr in c_node.attributes.keys():
if attr in constraint_rsc_refs and \
c_node.getAttribute(attr) == rsc_id:
cnt += 1
return cnt == 2
class IdMgmt(object):
'''
Make sure that ids are unique.
'''
def __init__(self):
self._id_store = {}
self.ok = True # error var
def new(self,node,pfx):
'''
Create a unique id for the xml node.
'''
name = node.getAttribute("name")
if node.tagName == "nvpair":
node_id = "%s-%s" % (pfx,name)
elif node.tagName == "op":
interval = node.getAttribute("interval")
if interval:
node_id = "%s-%s-%s" % (pfx,name,interval)
else:
node_id = "%s-%s" % (pfx,name)
else:
try:
hint = hints_list[node.tagName]
except: hint = ''
if hint:
node_id = "%s-%s" % (pfx,hint)
else:
node_id = "%s" % pfx
if self.is_used(node_id):
for cnt in range(99): # shouldn't really get here
try_id = "%s-%d" % (node_id,cnt)
if not self.is_used(try_id):
node_id = try_id
break
self.save(node_id)
return node_id
def check_node(self,node,lvl):
node_id = node.getAttribute("id")
if not node_id:
return
if id_in_use(node_id):
self.ok = False
return
def _store_node(self,node,lvl):
self.save(node.getAttribute("id"))
def _drop_node(self,node,lvl):
self.remove(node.getAttribute("id"))
def check_xml(self,node):
self.ok = True
xmltraverse_thin(node,self.check_node)
return self.ok
def store_xml(self,node):
if not self.check_xml(node):
return False
xmltraverse_thin(node,self._store_node)
return True
def remove_xml(self,node):
xmltraverse_thin(node,self._drop_node)
def replace_xml(self,oldnode,newnode):
self.remove_xml(oldnode)
if not self.store_xml(newnode):
self.store_xml(oldnode)
return False
return True
def is_used(self,node_id):
return node_id in self._id_store
def save(self,node_id):
if not node_id: return
self._id_store[node_id] = 1
def rename(self,old_id,new_id):
if not old_id or not new_id: return
if not self.is_used(old_id): return
if self.is_used(new_id): return
self.remove(old_id)
self.save(new_id)
def remove(self,node_id):
if not node_id: return
try:
del self._id_store[node_id]
except KeyError:
pass
def clear(self):
self._id_store = {}
def id_in_use(obj_id):
if id_store.is_used(obj_id):
id_used_err(obj_id)
return True
return False
#
# resource type definition
#
def disambiguate_ra_type(s):
'''
Unravel [class:[provider:]type]
'''
l = s.split(':')
if not l or len(l) > 3:
return None
if len(l) == 3:
return l
elif len(l) == 2:
ra_class,ra_type = l
else:
ra_class = "ocf"
ra_type = l[0]
ra_provider = ''
if ra_class == "ocf":
pl = ra_providers(ra_type,ra_class)
if pl and len(pl) == 1:
ra_provider = pl[0]
return ra_class,ra_provider,ra_type
def ra_type_validate(s, ra_class, provider, rsc_type):
'''
Only ocf ra class supports providers.
'''
if not rsc_type:
common_err("bad resource type specification %s"%s)
return False
if ra_class == "ocf":
if not provider:
common_err("provider could not be determined for %s"%s)
return False
else:
if provider:
common_warn("ra class %s does not support providers"%ra_class)
return False
return True
req_op_attributes = [\
"name", \
"id", \
]
op_attributes = [\
"interval", \
"timeout", \
"requires", \
"enabled", \
"role", \
"on-fail", \
"start-delay", \
"allow-migrate", \
"interval-origin", \
"record-pending", \
]
#
# CLI parsing utilities
# WARNING: ugly code ahead (to be replaced some day by a proper
# yacc parser, if there's such a thing)
#
def cli_parse_rsctype(s, pl):
'''
Parse the resource type.
'''
ra_class,provider,rsc_type = disambiguate_ra_type(s)
if not ra_type_validate(s,ra_class,provider,rsc_type):
return None
pl.append(["class",ra_class])
if ra_class == "ocf":
pl.append(["provider",provider])
pl.append(["type",rsc_type])
def cli_parse_attr_strict(s,pl):
'''
Parse attributes in the 'p=v' form.
'''
if s and '=' in s[0]:
n,v = s[0].split('=',1)
if not n:
return
pl.append([n,v])
cli_parse_attr_strict(s[1:],pl)
def cli_parse_attr(s,pl):
'''
Parse attributes in the 'p=v' form.
Allow also the 'p' form (no value) unless p is one of the
attr_list_keyw words.
'''
attr_lists_keyw = ("params","meta","operations","op","attributes")
if s:
if s[0] in attr_lists_keyw:
return
if '=' in s[0]:
n,v = s[0].split('=',1)
else:
n = s[0]; v = None
if not n:
return
pl.append([n,v])
cli_parse_attr(s[1:],pl)
def is_only_id(pl,keyw):
if len(pl) > 1:
common_err("%s: only single $id or $id-ref attribute is allowed" % keyw)
return False
if len(pl) == 1 and pl[0][0] not in ("$id","$id-ref"):
common_err("%s: only single $id or $id-ref attribute is allowed" % keyw)
return False
return True
def check_operation(pl):
op_name = find_value(pl,"name")
if not re.match("^[a-z][a-z_-]*$", op_name):
common_err("%s: bad action name" % op_name)
return False
if op_name == "monitor" and not find_value(pl,"interval"):
common_err("monitor requires interval")
return False
return True
def parse_resource(s):
el_type = s[0]
if el_type == "master": # ugly kludge :(
el_type = "ms"
attr_lists_keyw = ["params","meta"]
cli_list = []
# the head
head = []
head.append(["id",s[1]])
i = 3
if el_type == "primitive":
cli_parse_rsctype(s[2],head)
if not find_value(head,"type"):
syntax_err(s[2:], context = "primitive")
return False
else:
cl = []
cl.append(s[2])
if el_type == "group":
while i < len(s):
if s[i] in attr_lists_keyw:
break
else:
cl.append(s[i])
i += 1 # skip to the next token
head.append(["$children",cl])
cli_list.append([el_type,head])
# the rest
state = 0 # 1: reading operations; 2: operations read
while len(s) > i+1:
pl = []
keyw = s[i]
if keyw in attr_lists_keyw:
if state == 1:
state = 2
elif el_type == "primitive" and state == 0 and keyw == "operations":
state = 1
elif el_type == "primitive" and state <= 1 and keyw == "op":
if state == 0:
state = 1
pl.append(["name",s[i+1]])
else:
syntax_err(s[i:], context = 'primitive')
return False
if keyw == "op":
if len(s) > i+2:
cli_parse_attr(s[i+2:],pl)
if not check_operation(pl):
return False
else:
cli_parse_attr(s[i+1:],pl)
if len(pl) == 0:
syntax_err(s[i:], context = 'primitive')
return False
if keyw == "operations" and not is_only_id(pl,keyw):
return False
i += len(pl)+1
# interval is obligatory for ops, supply 0 if not there
if keyw == "op" and not find_value(pl,"interval"):
pl.append(["interval","0"])
cli_list.append([keyw,pl])
if len(s) > i:
syntax_err(s[i:], context = 'primitive')
return False
return cli_list
def parse_op(s):
if len(s) != 3:
syntax_err(s, context = s[0])
return False
cli_list = []
head_pl = []
# this is an op
cli_list.append(["op",head_pl])
if not cli_parse_rsc_role(s[1],head_pl):
return False
if not cli_parse_op_times(s[2],head_pl):
return False
# rename rsc-role to role
for i in range(len(head_pl)):
if head_pl[i][0] == "rsc-role":
head_pl[i][0] = "role"
break
# add the operation name
head_pl.append(["name",s[0]])
return cli_list
score_type = {'advisory': '0','mandatory': 'INFINITY'}
def cli_parse_score(score,pl):
if score.endswith(':'):
score = score.rstrip(':')
else:
syntax_err(score, context = 'score')
return False
if score in score_type:
pl.append(["score",score_type[score]])
elif re.match("^[+-]?(inf|infinity|INFINITY|[[0-9]+)$",score):
score = score.replace("infinity","INFINITY")
score = score.replace("inf","INFINITY")
pl.append(["score",score])
else:
pl.append(["score-attribute",score])
return True
binary_ops = ('lt','gt','lte','gte','eq','ne')
binary_types = ('string' , 'version' , 'number')
unary_ops = ('defined','not_defined')
def is_binary_op(s):
l = s.split(':')
if len(l) == 2:
return l[0] in binary_types and l[1] in binary_ops
elif len(l) == 1:
return l[0] in binary_ops
else:
return False
-def get_binary_type(pl):
- return [l[1] for l in pl if l[0] == "type"]
def cli_parse_binary_op(s,pl):
l = s.split(':')
if len(l) == 2:
pl.append(["type",l[0]])
pl.append(["operation",l[1]])
else:
pl.append(["operation",l[0]])
def cli_parse_expression(s,pl):
if len(s) > 1 and s[0] in unary_ops:
pl.append(["operation",s[0]])
pl.append(["attribute",s[1]])
elif len(s) > 2 and is_binary_op(s[1]):
pl.append(["attribute",s[0]])
cli_parse_binary_op(s[1],pl)
pl.append(["value",s[2]])
else:
return False
return True
+simple_date_ops = ('lt','gt')
+date_ops = ('lt','gt','in_range','date_spec')
+date_spec_names = '''hours monthdays weekdays yearsdays months \
+ weeks years weekyears moon'''.split()
+in_range_attrs = ('start','end')
+def cli_parse_dateexpr(s,pl):
+ if len(s) < 3:
+ return False
+ if s[1] not in date_ops:
+ return False
+ pl.append(["operation",s[1]])
+ if s[1] in simple_date_ops:
+ pl.append([s[1] == 'lt' and "end" or "start",s[2]])
+ return True
+ cli_parse_attr_strict(s[2:],pl)
+ return True
def parse_rule(s):
if s[0] != "rule":
syntax_err(s,context = "rule")
return 0,None
rule_list = []
head_pl = []
rule_list.append([s[0],head_pl])
i = 1
cli_parse_attr_strict(s[i:],head_pl)
i += len(head_pl)
if find_value(head_pl,"$id-ref"):
return i,rule_list
if not cli_parse_score(s[i],head_pl):
return i,None
i += 1
bool_op = ''
while len(s) > i+1:
pl = []
- if not cli_parse_expression(s[i:],pl):
+ if s[i] == "date":
+ fun = cli_parse_dateexpr
+ elem = "date_expression"
+ else:
+ fun = cli_parse_expression
+ elem = "expression"
+ if not fun(s[i:],pl):
syntax_err(s[i:],context = "rule")
return i,None
- rule_list.append(["expression",pl])
+ rule_list.append([elem,pl])
i += len(pl)
- if get_binary_type(pl):
+ if find_value(pl, "type"):
i -= 1 # reduce no of tokens by one if there was "type:op"
+ if elem == "date_expression":
+ i += 1 # increase no of tokens by one if it was date expression
if len(s) > i and s[i] in ('or','and'):
if bool_op and bool_op != s[i]:
common_err("rule contains different bool operations: %s" % ' '.join(s))
return i,None
else:
bool_op = s[i]
i += 1
if len(s) > i and s[i] == "rule":
break
if bool_op and bool_op != 'and':
head_pl.append(["boolean-op",bool_op])
return i,rule_list
def parse_location(s):
cli_list = []
head_pl = []
head_pl.append(["id",s[1]])
head_pl.append(["rsc",s[2]])
cli_list.append([s[0],head_pl])
if len(s) == 5 and s[3] != "rule": # the short node preference form
if not cli_parse_score(s[3],head_pl):
return False
head_pl.append(["node",s[4]])
return cli_list
i = 3
while i < len(s):
numtoks,l = parse_rule(s[i:])
if not l:
return False
cli_list += l
i += numtoks
if len(s) < i:
syntax_err(s[i:],context = "location")
return False
return cli_list
def cli_opt_symmetrical(s,pl):
if not s:
return True
pl1 = []
cli_parse_attr(s,pl1)
if len(pl1) != 1 or not find_value(pl1,"symmetrical"):
syntax_err(s,context = "order")
return False
pl += pl1
return True
roles = ('Stopped', 'Started', 'Master', 'Slave')
def cli_parse_rsc_role(s,pl,attr_pfx = ''):
l = s.split(':')
pl.append([attr_pfx+"rsc",l[0]])
if len(l) == 2:
if l[1] not in roles:
bad_def_err("resource role",s)
return False
pl.append([attr_pfx+"rsc-role",l[1]])
elif len(l) > 2:
bad_def_err("resource role",s)
return False
return True
def cli_parse_op_times(s,pl):
l = s.split(':')
pl.append(["interval",l[0]])
if len(l) == 2:
pl.append(["timeout",l[1]])
elif len(l) > 2:
bad_def_err("op times",s)
return False
return True
def parse_colocation(s):
cli_list = []
head_pl = []
type = s[0]
if type == "collocation": # another ugly :(
type = "colocation"
cli_list.append([type,head_pl])
if len(s) != 5:
syntax_err(s,context = "colocation")
return False
head_pl.append(["id",s[1]])
if not cli_parse_score(s[2],head_pl):
return False
if not cli_parse_rsc_role(s[3],head_pl):
return False
if not cli_parse_rsc_role(s[4],head_pl,'with-'):
return False
return cli_list
actions = ( 'start', 'promote', 'demote', 'stop')
def cli_parse_rsc_action(s,pl,rsc_pos):
l = s.split(':')
pl.append([rsc_pos,l[0]])
if len(l) == 2:
if l[1] not in actions:
bad_def_err("resource action",s)
return False
pl.append([rsc_pos+"-action",l[1]])
elif len(l) > 1:
bad_def_err("resource action",s)
return False
return True
def parse_order(s):
cli_list = []
head_pl = []
cli_list.append([s[0],head_pl])
if len(s) < 5 or len(s) > 6:
syntax_err(s,context = "order")
return False
head_pl.append(["id",s[1]])
if not cli_parse_score(s[2],head_pl):
return False
if not cli_parse_rsc_action(s[3],head_pl,'first'):
return False
if not cli_parse_rsc_action(s[4],head_pl,'then'):
return False
if not cli_opt_symmetrical(s[5:],head_pl):
return False
return cli_list
def parse_constraint(s):
if s[0] == "location":
return parse_location(s)
elif s[0] in ("colocation","collocation"):
return parse_colocation(s)
elif s[0] == "order":
return parse_order(s)
def parse_property(s):
cli_list = []
head_pl = []
cli_list.append([s[0],head_pl])
cli_parse_attr(s[1:],head_pl)
if len(head_pl) < 0 or len(s) > len(head_pl)+1:
syntax_err(s, context = s[0])
return False
return cli_list
def cli_parse_uname(s, pl):
l = s.split(':')
if not l or len(l) > 2:
return None
pl.append(["uname",l[0]])
if len(l) == 2:
pl.append(["type",l[1]])
def parse_node(s):
cli_list = []
# the head
head = []
# optional $id
id = ''
opt_id_l = []
i = 1
cli_parse_attr_strict(s[i:],opt_id_l)
if opt_id_l:
id = find_value(opt_id_l,"$id")
i += 1
# uname[:type]
cli_parse_uname(s[i],head)
uname = find_value(head,"uname")
if not uname:
return False
head.append(["id",id and id or uname])
# drop type if default
type = find_value(head,"type")
if type == CibNode.default_type:
head.remove(["type",type])
cli_list.append([s[0],head])
if len(s) == i:
return cli_list
# the rest
i += 1
keyw = CibNode.node_attributes_keyw # some day there may be more than one
while len(s) > i+1:
if s[i] != keyw:
syntax_err(s[i:], context = 'node')
return False
pl = []
cli_parse_attr(s[i+1:],pl)
if len(pl) == 0:
syntax_err(s[i:], context = 'node')
return False
i += len(pl)+1
cli_list.append([keyw,pl])
if len(s) > i:
syntax_err(s[i:], context = 'node')
return False
return cli_list
def parse_cli(s):
'''
Input: a list of tokens (or a CLI format string).
Return: a list of items; each item is a tuple
with two members: a string (tag) and a nvpairs or
attributes dict.
'''
if type(s) == type(u''):
s = s.encode('ascii')
if type(s) == type(''):
try: s = shlex.split(s)
except ValueError, msg:
common_err(msg)
return False
while '\n' in s:
s.remove('\n')
if s and s[0].startswith('#'):
return None
if len(s) > 1 and (s[0] == "property" or s[0] in defaults_tags):
return parse_property(s)
if len(s) > 1 and s[0] == "node":
return parse_node(s)
if len(s) < 3: # we want at least two tokens
syntax_err(s)
return False
if is_resource_cli(s[0]):
return parse_resource(s)
elif is_constraint_cli(s[0]):
return parse_constraint(s)
elif s[0] == "monitor":
return parse_op(s)
else:
syntax_err(s)
return False
#
# XML generate utilities
#
hints_list = {
"instance_attributes": "instance_attributes",
"meta_attributes": "meta_attributes",
"operations": "ops",
"rule": "rule",
"expression": "expression",
}
match_list = {
"node": ("uname"),
"crm_config": (),
"rsc_defaults": (),
"op_defaults": (),
"cluster_property_set": (),
"instance_attributes": (),
"meta_attributes": (),
"operations": (),
"nvpair": ("name",),
"op": ("name","interval"),
"rule": ("score","score-attribute","role"),
"expression": ("attribute","operation","value"),
}
def set_id_used_attr(node):
node.setAttribute("__id_used", "Yes")
def is_id_used_attr(node):
return node.getAttribute("__id_used") == "Yes"
def remove_id_used_attr(node,lvl):
if is_element(node) and is_id_used_attr(node):
node.removeAttribute("__id_used")
def remove_id_used_attributes(node):
if node:
xmltraverse(node, remove_id_used_attr)
def lookup_node(node,oldnode,location_only = False):
'''
Find a child of oldnode which matches node.
'''
#print "match:",node.tagName,oldnode.getAttribute("id")
if not oldnode:
return None
try:
attr_list = match_list[node.tagName]
except KeyError:
attr_list = []
for c in oldnode.childNodes:
if not is_element(c):
continue
if not location_only and is_id_used_attr(c):
continue
if node.tagName == c.tagName:
failed = False
for a in attr_list:
if node.getAttribute(a) != c.getAttribute(a):
failed = True
break
if not failed:
return c
return None
def set_id(node,oldnode,id_hint,id_required = True):
'''
Set the id attribute for the node.
Procedure:
- if the node already contains "id", keep it
- if the old node contains "id", copy that
- if neither is true, then create a new one using id_hint
(exception: if not id_required, then no new id is generated)
Finally, save the new id in id_store.
'''
old_id = None
new_id = node.getAttribute("id")
if oldnode and oldnode.getAttribute("id"):
old_id = oldnode.getAttribute("id")
if not new_id:
new_id = old_id
if not new_id:
if id_required:
new_id = id_store.new(node,id_hint)
else:
id_store.save(new_id)
if new_id:
node.setAttribute("id",new_id)
if oldnode and old_id == new_id:
set_id_used_attr(oldnode)
def mkxmlsimple(e,oldnode,id_hint):
'''
Create an xml node from the (name,dict) pair. The name is the
name of the element. The dict contains a set of attributes.
'''
node = cib_factory.createElement(e[0])
for n,v in e[1]:
if n == "$children": # this one's skipped
continue
if n.startswith('$'):
n = n.lstrip('$')
if (type(v) != type('') and type(v) != type(u'')) \
or v: # skip empty strings
node.setAttribute(n,v)
id_ref = node.getAttribute("id-ref")
if id_ref:
id_ref_2 = cib_factory.resolve_id_ref(e[0],id_ref)
node.setAttribute("id-ref",id_ref_2)
else:
set_id(node,lookup_node(node,oldnode),id_hint)
return node
def find_value(pl,name):
for n,v in pl:
if n == name:
return v
return None
def find_operation(rsc_node,name,interval):
op_node_l = rsc_node.getElementsByTagName("operations")
for ops in op_node_l:
for c in ops.childNodes:
if not is_element(c):
continue
if c.tagName != "op":
continue
if c.getAttribute("name") == name \
and c.getAttribute("interval") == interval:
return c
def mkxmlnvpairs(e,oldnode,id_hint):
'''
Create xml from the (name,dict) pair. The name is the name of
the element. The dict contains a set of nvpairs. Stuff such
as instance_attributes.
NB: Other tags not containing nvpairs are fine if the dict is empty.
'''
node = cib_factory.createElement(e[0])
match_node = lookup_node(node,oldnode)
id_ref = find_value(e[1],"$id-ref")
if id_ref:
id_ref_2 = cib_factory.resolve_id_ref(e[0],id_ref)
node.setAttribute("id-ref",id_ref_2)
if e[0] != "operations":
return node # id_ref is the only attribute (if not operations)
e[1].remove(["$id-ref",id_ref])
v = find_value(e[1],"$id")
if v:
node.setAttribute("id",v)
e[1].remove(["$id",v])
else:
if e[0] == "operations": # operations don't need no id
set_id(node,match_node,id_hint,id_required = False)
else:
set_id(node,match_node,id_hint)
try:
hint = hints_list[e[0]]
except: hint = ''
hint = hint and "%s_%s" % (id_hint,hint) or id_hint
nvpair_pfx = node.getAttribute("id") or hint
for n,v in e[1]:
nvpair = cib_factory.createElement("nvpair")
node.appendChild(nvpair)
nvpair.setAttribute("name",n)
if v != None:
nvpair.setAttribute("value",v)
set_id(nvpair,lookup_node(nvpair,match_node),nvpair_pfx)
return node
def mkxmlop(e,oldnode,id_hint):
'''
Create an operation xml from the (name,dict) pair.
'''
node = cib_factory.createElement(e[0])
inst_attr = []
for n,v in e[1]:
if n in req_op_attributes + op_attributes:
node.setAttribute(n,v)
else:
inst_attr.append([n,v])
tmp = cib_factory.createElement("operations")
oldops = lookup_node(tmp,oldnode) # first find old operations
oldop = lookup_node(node,oldops)
set_id(node,oldop,id_hint)
if inst_attr:
e = ["instance_attributes",inst_attr]
nia = mkxmlnvpairs(e,oldop,node.getAttribute("id"))
node.appendChild(nia)
return node
+def mkxmldate(e,oldnode,id_hint):
+ '''
+ Create a date_expression xml from the (name,dict) pair.
+ '''
+ node = cib_factory.createElement(e[0])
+ operation = find_value(e[1],"operation")
+ node.setAttribute("operation", operation)
+ old_date = lookup_node(node,oldnode) # first find old date element
+ set_id(node,old_date,id_hint)
+ date_spec_attr = []
+ for n,v in e[1]:
+ if n in date_ops or n == "operation":
+ continue
+ elif n in in_range_attrs:
+ node.setAttribute(n,v)
+ else:
+ date_spec_attr.append([n,v])
+ if not date_spec_attr:
+ return node
+ elem = operation == "date_spec" and "date_spec" or "duration"
+ tmp = cib_factory.createElement(elem)
+ old_date_spec = lookup_node(tmp,old_date) # first find old date element
+ set_id(tmp,old_date_spec,id_hint)
+ for n,v in date_spec_attr:
+ tmp.setAttribute(n,v)
+ node.appendChild(tmp)
+ return node
+
conv_list = {
"params": "instance_attributes",
"meta": "meta_attributes",
"property": "cluster_property_set",
"rsc_defaults": "meta_attributes",
"op_defaults": "meta_attributes",
"attributes": "instance_attributes",
}
def mkxmlnode(e,oldnode,id_hint):
'''
Create xml from the (name,dict) pair. The name is the name of
the element. The dict contains either a set of nvpairs or a
set of attributes. The id is either generated or copied if
found in the provided xml. Stuff such as instance_attributes.
'''
if e[0] in conv_list:
e[0] = conv_list[e[0]]
if e[0] in ("instance_attributes","meta_attributes","operations","cluster_property_set"):
return mkxmlnvpairs(e,oldnode,id_hint)
elif e[0] == "op":
return mkxmlop(e,oldnode,id_hint)
+ elif e[0] == "date_expression":
+ return mkxmldate(e,oldnode,id_hint)
else:
return mkxmlsimple(e,oldnode,id_hint)
def new_cib():
doc = xml.dom.minidom.Document()
cib = doc.createElement("cib")
doc.appendChild(cib)
configuration = doc.createElement("configuration")
cib.appendChild(configuration)
crm_config = doc.createElement("crm_config")
configuration.appendChild(crm_config)
rsc_defaults = doc.createElement("rsc_defaults")
configuration.appendChild(rsc_defaults)
op_defaults = doc.createElement("op_defaults")
configuration.appendChild(op_defaults)
nodes = doc.createElement("nodes")
configuration.appendChild(nodes)
resources = doc.createElement("resources")
configuration.appendChild(resources)
constraints = doc.createElement("constraints")
configuration.appendChild(constraints)
return doc,cib,crm_config,rsc_defaults,op_defaults,nodes,resources,constraints
def mk_topnode(doc, tag):
"Get configuration element or create/append if there's none."
try:
e = doc.getElementsByTagName(tag)[0]
except:
e = doc.createElement(tag)
conf = doc.getElementsByTagName("configuration")[0]
if conf:
conf.appendChild(e)
else:
return None
return e
def get_conf_elem(doc, tag):
try:
return doc.getElementsByTagName(tag)[0]
except:
return None
def read_cib(cmd):
doc = xml2doc(cmd)
if not doc:
return doc,None
cib = doc.childNodes[0]
if not is_element(cib) or cib.tagName != "cib":
cib_no_elem_err("cib")
return doc,None
return doc,cib
def set_nvpair(set_node,name,value):
n_id = set_node.getAttribute("id")
for c in set_node.childNodes:
if is_element(c) and c.getAttribute("name") == name:
c.setAttribute("value",value)
return
np = cib_factory.createElement("nvpair")
np.setAttribute("name",name)
np.setAttribute("value",value)
new_id = id_store.new(np,n_id)
np.setAttribute("id",new_id)
set_node.appendChild(np)
def xml_cmp(n, m, show = False):
rc = hash(n.toxml()) == hash(m.toxml())
if show and not batch and interactive and not rc:
print "original:",n.toprettyxml()
print "processed:",m.toprettyxml()
return hash(n.toxml()) == hash(m.toxml())
def show_unrecognized_elems(doc):
try:
conf = doc.getElementsByTagName("configuration")[0]
except:
common_warn("CIB has no configuration element")
return
for topnode in conf.childNodes:
if not is_element(topnode):
continue
if is_defaults(topnode):
continue
if not topnode.tagName in cib_topnodes:
common_warn("unrecognized CIB element %s" % c.tagName)
continue
for c in topnode.childNodes:
if not is_element(topnode):
continue
if not c.tagName in cib_object_map:
common_warn("unrecognized CIB element %s" % c.tagName)
def get_interesting_nodes(node,nodes):
for c in node.childNodes:
if is_element(c) and c.tagName in cib_object_map:
nodes.append(c)
get_interesting_nodes(c,nodes)
return nodes
def filter_on_tag(nl,tag):
return [node for node in nl if node.tagName == tag]
def nodes(node_list):
return filter_on_tag(node_list,"node")
def primitives(node_list):
return filter_on_tag(node_list,"primitive")
def groups(node_list):
return filter_on_tag(node_list,"group")
def clones(node_list):
return filter_on_tag(node_list,"clone")
def mss(node_list):
return filter_on_tag(node_list,"master")
def constraints(node_list):
return filter_on_tag(node_list,"rsc_location") \
+ filter_on_tag(node_list,"rsc_colocation") \
+ filter_on_tag(node_list,"rsc_order")
def properties(node_list):
return filter_on_tag(node_list,"cluster_property_set") \
+ filter_on_tag(node_list,"rsc_defaults") \
+ filter_on_tag(node_list,"op_defaults")
def processing_sort(nl):
'''
It's usually important to process cib objects in this order,
i.e. simple objects first.
'''
return nodes(nl) + primitives(nl) + groups(nl) + mss(nl) + clones(nl) \
+ constraints(nl) + properties(nl)
def obj_cmp(obj1,obj2):
return cmp(obj1.obj_id,obj2.obj_id)
def filter_on_type(cl,obj_type):
if type(cl[0]) == type([]):
l = [cli_list for cli_list in cl if cli_list[0][0] == obj_type]
l.sort(cmp = cmp)
else:
l = [obj for obj in cl if obj.obj_type == obj_type]
l.sort(cmp = obj_cmp)
return l
def nodes_cli(cl):
return filter_on_type(cl,"node")
def primitives_cli(cl):
return filter_on_type(cl,"primitive")
def groups_cli(cl):
return filter_on_type(cl,"group")
def clones_cli(cl):
return filter_on_type(cl,"clone")
def mss_cli(cl):
return filter_on_type(cl,"ms") + filter_on_type(cl,"master")
def constraints_cli(node_list):
return filter_on_type(node_list,"location") \
+ filter_on_type(node_list,"colocation") \
+ filter_on_type(node_list,"collocation") \
+ filter_on_type(node_list,"order")
def properties_cli(cl):
return filter_on_type(cl,"property") \
+ filter_on_type(cl,"rsc_defaults") \
+ filter_on_type(cl,"op_defaults")
def ops_cli(cl):
return filter_on_type(cl,"op")
def processing_sort_cli(cl):
'''
Return the given list in this order:
nodes, primitives, groups, ms, clones, constraints, rest
Both a list of objects (CibObject) and list of cli
representations accepted.
'''
return nodes_cli(cl) + primitives_cli(cl) + groups_cli(cl) + mss_cli(cl) + clones_cli(cl) \
+ constraints_cli(cl) + properties_cli(cl) + ops_cli(cl)
def referenced_resources_cli(cli_list):
id_list = []
head = cli_list[0]
obj_type = head[0]
if obj_type == "location":
id_list.append(find_value(head[1],"rsc"))
elif obj_type == "colocation":
id_list.append(find_value(head[1],"rsc"))
id_list.append(find_value(head[1],"with-rsc"))
elif obj_type == "order":
id_list.append(find_value(head[1],"first"))
id_list.append(find_value(head[1],"then"))
return id_list
#
# CLI format generation utilities (from XML)
#
def cli_format(pl,format):
if format:
return ' \\\n\t'.join(pl)
else:
return ' '.join(pl)
def nvpair_format(n,v):
return v == None and cli_display.attr_name(n) \
or '%s="%s"'%(cli_display.attr_name(n),cli_display.attr_value(v))
def cli_pairs(pl):
'Return a string of name="value" pairs (passed in a list of pairs).'
l = []
for n,v in pl:
l.append(nvpair_format(n,v))
return ' '.join(l)
def nvpairs2list(node, add_id = False):
'''
Convert nvpairs to a list of pairs.
The id attribute is normally skipped, since they tend to be
long and therefore obscure the relevant content. For some
elements, however, they are included (e.g. properties).
'''
pl = []
# if there's id-ref, there can be then _only_ id-ref
value = node.getAttribute("id-ref")
if value:
pl.append(["$id-ref",value])
return pl
if add_id or \
(not node.childNodes and len(node.attributes) == 1):
value = node.getAttribute("id")
if value:
pl.append(["$id",value])
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName == "attributes":
pl = nvpairs2list(c)
name = c.getAttribute("name")
if "value" in c.attributes.keys():
value = c.getAttribute("value")
else:
value = None
pl.append([name,value])
return pl
def cli_op(node):
pl = []
action = ""
for name in node.attributes.keys():
if name == "name":
action = node.getAttribute(name)
elif name != "id": # skip the id
pl.append([name,node.getAttribute(name)])
if not action:
common_err("op is invalid (no name)")
return ""
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName != "instance_attributes":
common_err("only instance_attributes are supported in operations")
pl += nvpairs2list(c)
return "%s %s %s" % (cli_display.keyword("op"),action,cli_pairs(pl))
def cli_operations(node,format = True):
l = []
node_id = node.getAttribute("id")
s = ''
if node_id:
s = '$id="%s"' % node_id
idref = node.getAttribute("id-ref")
if idref:
s = '%s $id-ref="%s"' % (s,idref)
if s:
l.append("%s %s" % (cli_display.keyword("operations"),s))
for c in node.childNodes:
if is_element(c) and c.tagName == "op":
l.append(cli_op(c))
return cli_format(l,format)
+def date_exp2cli(node):
+ l = []
+ operation = node.getAttribute("operation")
+ l.append(cli_display.keyword("date"))
+ l.append(cli_display.keyword(operation))
+ if operation in simple_date_ops:
+ value = node.getAttribute(operation == 'lt' and "end" or "start")
+ l.append('"%s"' % cli_display.attr_value(value))
+ else:
+ if operation == 'in_range':
+ for name in in_range_attrs:
+ v = node.getAttribute(name)
+ if v:
+ l.append(nvpair_format(name,v))
+ for c in node.childNodes:
+ if is_element(c) and c.tagName in ("duration","date_spec"):
+ pl = []
+ for name in c.attributes.keys():
+ if name != "id":
+ pl.append([name,c.getAttribute(name)])
+ l.append(cli_pairs(pl))
+ return ' '.join(l)
def exp2cli(node):
operation = node.getAttribute("operation")
type = node.getAttribute("type")
if type:
operation = "%s:%s" % (type, operation)
attribute = node.getAttribute("attribute")
value = node.getAttribute("value")
if not value:
return "%s %s" % (cli_display.keyword(operation),attribute)
else:
return "%s %s %s" % (attribute,cli_display.keyword(operation),value)
def get_score(node):
score = node.getAttribute("score")
if not score:
score = node.getAttribute("score-attribute")
else:
if score.find("INFINITY") >= 0:
score = score.replace("INFINITY","inf")
return score + ":"
def cli_rule(node):
s = []
node_id = node.getAttribute("id")
if node_id:
s.append('$id="%s"' % node_id)
else:
idref = node.getAttribute("id-ref")
if idref:
return '$id-ref="%s"' % idref
rsc_role = node.getAttribute("role")
if rsc_role:
s.append('$role="%s"' % rsc_role)
s.append(cli_display.score(get_score(node)))
bool_op = node.getAttribute("boolean-op")
if not bool_op:
bool_op = "and"
exp = []
for c in node.childNodes:
- if is_element(c) and c.tagName == "expression":
+ if not is_element(c):
+ continue
+ if c.tagName == "date_expression":
+ exp.append(date_exp2cli(c))
+ elif c.tagName == "expression":
exp.append(exp2cli(c))
expression = (" %s "%cli_display.keyword(bool_op)).join(exp)
return "%s %s" % (' '.join(s),expression)
def node_head(node):
obj_type = cib_object_map[node.tagName][0]
node_id = node.getAttribute("id")
uname = node.getAttribute("uname")
s = cli_display.keyword(obj_type)
if node_id != uname:
s = '%s $id="%s"' % (s, node_id)
s = '%s %s' % (s, cli_display.id(uname))
type = node.getAttribute("type")
if type != CibNode.default_type:
s = '%s:%s' % (s, type)
return s
def primitive_head(node):
obj_type = cib_object_map[node.tagName][0]
node_id = node.getAttribute("id")
ra_type = node.getAttribute("type")
ra_class = node.getAttribute("class")
ra_provider = node.getAttribute("provider")
s1 = s2 = ''
if ra_class:
s1 = "%s:"%ra_class
if ra_provider:
s2 = "%s:"%ra_provider
s = cli_display.keyword(obj_type)
id = cli_display.id(node_id)
return "%s %s %s" % (s, id, ''.join((s1,s2,ra_type)))
def cont_head(node):
obj_type = cib_object_map[node.tagName][0]
node_id = node.getAttribute("id")
children = []
for c in node.childNodes:
if not is_element(c):
continue
if (obj_type == "group" and is_primitive(c)) or \
is_child_rsc(c):
children.append(cli_display.rscref(c.getAttribute("id")))
elif obj_type in clonems_tags and is_child_rsc(c):
children.append(cli_display.rscref(c.getAttribute("id")))
s = cli_display.keyword(obj_type)
id = cli_display.id(node_id)
return "%s %s %s" % (s, id, ' '.join(children))
def location_head(node):
obj_type = cib_object_map[node.tagName][0]
node_id = node.getAttribute("id")
rsc = cli_display.rscref(node.getAttribute("rsc"))
s = cli_display.keyword(obj_type)
id = cli_display.id(node_id)
s = "%s %s %s"%(s,id,rsc)
pref_node = node.getAttribute("node")
score = cli_display.score(get_score(node))
if pref_node:
return "%s %s %s" % (s,score,pref_node)
else:
return s
def mkrscrole(node,n):
rsc = cli_display.rscref(node.getAttribute(n))
rsc_role = node.getAttribute(n + "-role")
if rsc_role:
return "%s:%s"%(rsc,rsc_role)
else:
return rsc
def mkrscaction(node,n):
rsc = cli_display.rscref(node.getAttribute(n))
rsc_action = node.getAttribute(n + "-action")
if rsc_action:
return "%s:%s"%(rsc,rsc_action)
else:
return rsc
def simple_constraint_head(node):
obj_type = cib_object_map[node.tagName][0]
node_id = node.getAttribute("id")
s = cli_display.keyword(obj_type)
id = cli_display.id(node_id)
score = cli_display.score(get_score(node))
col = []
if obj_type == "colocation":
col.append(mkrscrole(node,"rsc"))
col.append(mkrscrole(node,"with-rsc"))
else:
col.append(mkrscaction(node,"first"))
col.append(mkrscaction(node,"then"))
symm = node.getAttribute("symmetrical")
if symm:
col.append("symmetrical=%s"%symm)
return "%s %s %s %s" % (s,id,score,' '.join(col))
class CibObjectSet(object):
'''
Edit or display a set of cib objects.
repr() for objects representation and
save() used to store objects into internal structures
are defined in subclasses.
'''
def __init__(self, *args):
self.obj_list = []
def _open_url(self,src):
import urllib
try:
return urllib.urlopen(src)
except:
pass
if src == "-":
return sys.stdin
try:
return open(src)
except:
pass
common_err("could not open %s" % src)
return False
def edit_save(self,s,erase = False):
'''
Save string s to a tmp file. Invoke editor to edit it.
Parse/save the resulting file. In case of syntax error,
allow user to reedit. If erase is True, erase the CIB
first.
If no changes are done, return silently.
'''
tmp = str2tmp(s)
if not tmp:
return False
filehash = hash(s)
rc = False
while True:
if edit_file(tmp) != 0:
break
try: f = open(tmp,'r')
except IOError, msg:
common_err(msg)
break
s = ''.join(f)
f.close()
if hash(s) == filehash: # file unchanged
break
if erase:
cib_factory.erase()
if not self.save(s):
if ask("There was a parsing problem. Do you want to edit again?"):
continue
rc = True
break
try: os.unlink(tmp)
except: pass
return rc
def edit(self):
if batch:
common_info("edit not allowed in batch mode")
return False
cli_display.set_no_pretty()
s = self.repr()
cli_display.reset_no_pretty()
return self.edit_save(s)
def save_to_file(self,fname):
if fname == "-":
f = sys.stdout
else:
if not batch and os.access(fname,os.F_OK):
if not ask("File %s exists. Do you want to overwrite it?"%fname):
return False
try: f = open(fname,"w")
except IOError, msg:
common_err(msg)
return False
rc = True
cli_display.set_no_pretty()
s = self.repr()
cli_display.reset_no_pretty()
if s:
f.write(s)
f.write('\n')
else:
rc = False
if f != sys.stdout:
f.close()
return rc
def show(self):
s = self.repr()
if not s:
return False
page_string(s)
def import_file(self,method,fname):
if method == "replace":
if interactive and cib_factory.has_cib_changed():
if not ask("This operation will erase all changes. Do you want to proceed?"):
return False
cib_factory.erase()
f = self._open_url(fname)
if not f:
return False
s = ''.join(f)
if f != sys.stdin:
f.close()
return self.save(s)
def repr(self):
'''
Return a string with objects's representations (either
CLI or XML).
'''
return ''
def save(self,s):
'''
For each object:
- try to find a corresponding object in obj_list
- if not found: create new
- if found: replace the object in the obj_list with
the new object
See below for specific implementations.
'''
pass
def lookup_cli(self,cli_list):
for obj in self.obj_list:
if obj.matchcli(cli_list):
return obj
def lookup(self,xml_obj_type,obj_id):
for obj in self.obj_list:
if obj.match(xml_obj_type,obj_id):
return obj
def drop_remaining(self):
'Any remaining objects in obj_list are deleted.'
l = [x.obj_id for x in self.obj_list]
return cib_factory.delete(*l)
def mkset_obj(*args):
if args and args[0] == "xml":
obj = lambda: CibObjectSetRaw(*args[1:])
else:
obj = lambda: CibObjectSetCli(*args)
return obj()
class CibObjectSetCli(CibObjectSet):
'''
Edit or display a set of cib objects (using cli notation).
'''
def __init__(self, *args):
CibObjectSet.__init__(self, *args)
self.obj_list = cib_factory.mkobj_list("cli",*args)
def repr(self):
"Return a string containing cli format of all objects."
if not self.obj_list:
return ''
return '\n'.join(obj.repr_cli() \
for obj in processing_sort_cli(self.obj_list))
def process(self,cli_list):
obj = self.lookup_cli(cli_list)
if obj:
if obj.update_from_cli(cli_list) != False:
self.obj_list.remove(obj)
return True
else:
return False
else:
return cib_factory.create_from_cli(cli_list)
def save(self,s):
'''
Save a user supplied cli format configuration.
On syntax error, no changes are done and user is
typically asked to review the configuration (for instance
on editting).
On processing errors, there's no way back.
TODO: Implement undo configuration changes.
'''
global lineno
l = []
rc = True
save_lineno = lineno
lineno = 0
for cli_text in lines2cli(s):
lineno += 1
cli_list = parse_cli(cli_text)
if cli_list:
l.append(cli_list)
elif cli_list == False:
rc = False
lineno = save_lineno
# we can't proceed if there was a syntax error, but we
# can ask the user to fix problems
if not rc:
return rc
if l:
for cli_list in processing_sort_cli(l):
if self.process(cli_list) == False:
rc = False
if not self.drop_remaining():
rc = False
return rc
class CibObjectSetRaw(CibObjectSet):
'''
Edit or display one or more CIB objects (XML).
'''
def __init__(self, *args):
CibObjectSet.__init__(self, *args)
self.obj_list = cib_factory.mkobj_list("xml",*args)
def repr(self):
"Return a string containing xml of all objects."
doc = cib_factory.objlist2doc(self.obj_list)
s = doc.toprettyxml(user_prefs.xmlindent)
doc.unlink()
return s
def repr_configure(self):
'''
Return a string containing xml of configure and its
children.
'''
doc = cib_factory.objlist2doc(self.obj_list)
conf_node = doc.getElementsByTagName("configuration")[0]
s = conf_node.toprettyxml(user_prefs.xmlindent)
doc.unlink()
return s
def process(self,node):
obj = self.lookup(node.tagName,node.getAttribute("id"))
if obj:
if obj.update_from_node(node) != False:
self.obj_list.remove(obj)
else:
return False
else:
return cib_factory.create_from_node(node)
def save(self,s):
try:
doc = xml.dom.minidom.parseString(s)
except xml.parsers.expat.ExpatError,msg:
cib_parse_err(msg)
return False
rc = True
sanitize_cib(doc)
show_unrecognized_elems(doc)
newnodes = get_interesting_nodes(doc,[])
if newnodes:
for node in processing_sort(newnodes):
if not self.process(node):
rc = False
if not self.drop_remaining():
rc = False
doc.unlink()
return rc
def verify(self):
cli_display.set_no_pretty()
rc = pipe_string(cib_verify,self.repr())
cli_display.reset_no_pretty()
return rc in (0,1)
def ptest(self):
ptest = "ptest -X -VV"
if user_prefs.dotty:
fd,tmpfile = mkstemp()
ptest = "%s -D %s" % (ptest,tmpfile)
else:
tmpfile = None
doc = cib_factory.objlist2doc(self.obj_list)
cib = doc.childNodes[0]
running_doc,running_cib = read_cib(cib_dump)
if not running_doc:
return False
status = get_conf_elem(running_doc, "status")
if not status:
common_err("the running cib contains no status")
return False
cib.appendChild(doc.importNode(status,1))
pipe_string(ptest,doc.toprettyxml())
doc.unlink()
if tmpfile:
p = subprocess.Popen("%s %s" % (user_prefs.dotty,tmpfile), shell=True, bufsize=0, stdin=None, stdout=None, stderr=None, close_fds=True)
common_info("starting %s to show transition graph"%user_prefs.dotty)
tmpfiles.append(tmpfile)
else:
common_info("install graphviz to see a transition graph")
return True
class CibObject(object):
'''
The top level object of the CIB. Resources and constraints.
'''
def __init__(self,xml_obj_type,obj_id = None):
if not xml_obj_type in cib_object_map:
unsupported_err(xml_obj_type)
return
self.obj_type = cib_object_map[xml_obj_type][0]
self.parent_type = cib_object_map[xml_obj_type][2]
self.xml_obj_type = xml_obj_type
self.origin = "" # where did it originally come from?
self.nocli = False # we don't support this one
self.updated = False # was the object updated
self.parent = None # object superior (group/clone/ms)
self.children = [] # objects inferior
if obj_id:
if not self.mknode(obj_id):
self = None # won't do :(
else:
self.obj_id = None
self.node = None
def repr_cli(self,node = None,format = True):
'''
CLI representation for the node. Defined in subclasses.
'''
return ''
def cli2node(self,cli,oldnode = None):
'''
Convert CLI representation to a DOM node.
Defined in subclasses.
'''
return None
def save_xml(self,node):
self.obj_id = node.getAttribute("id")
self.node = node
return self.cli_use_validate()
def mknode(self,obj_id):
if id_in_use(obj_id):
return False
if self.xml_obj_type in defaults_tags:
tag = "meta_attributes"
else:
tag = self.xml_obj_type
self.node = cib_factory.createElement(tag)
self.obj_id = obj_id
self.node.setAttribute("id",self.obj_id)
self.origin = "user"
return True
def mkcopy(self):
'''
Create a new object with the same obj_id and obj_type
(for the purpose of CibFactory.delete_objects)
'''
obj_copy = CibObject(self.xml_obj_type)
obj_copy.obj_id = self.obj_id
obj_copy.obj_type = self.obj_type
return obj_copy
def can_be_renamed(self):
'''
Return False if this object can't be renamed.
'''
if is_rsc_running(self.obj_id):
common_err("cannot rename a running resource (%s)" % self.obj_id)
return False
if not is_live_cib() and self.node.tagName == "node":
common_err("cannot rename nodes")
return False
return True
def attr_exists(self,attr):
if not attr in self.node.attributes.keys():
no_attribute_err(attr,self.obj_id)
return False
return True
def cli_use_validate(self):
'''
Check validity of the object, as we know it. It may
happen that we don't recognize a construct, but that the
object is still valid for the CRM. In that case, the
object is marked as "CLI read only", i.e. we will neither
convert it to CLI nor try to edit it in that format.
The validation procedure:
we convert xml to cli and then back to xml. If the two
xml representations match then we can understand the xml.
'''
if not self.node:
return True
if not self.attr_exists("id"):
return False
cli_display.set_no_pretty()
cli_text = self.repr_cli()
cli_display.reset_no_pretty()
if not cli_text:
return False
xml2 = self.cli2node(cli_text)
if not xml2:
return False
rc = xml_cmp(self.node, xml2, show = True)
xml2.unlink()
return rc
def matchcli(self,cli_list):
head = cli_list[0]
return self.obj_type == head[0] \
and self.obj_id == find_value(head[1],"id")
def match(self,xml_obj_type,obj_id):
return self.xml_obj_type == xml_obj_type and self.obj_id == obj_id
def obj_string(self):
return "%s:%s" % (self.obj_type,self.obj_id)
def reset_updated(self):
self.updated = False
self.origin = 'cib'
for child in self.children:
child.reset_updated()
def propagate_updated(self):
if self.parent:
self.parent.updated = self.updated
self.parent.propagate_updated()
def update_links(self):
'''
Update the structure links for the object (self.children,
self.parent). Update also the dom nodes, if necessary.
'''
self.children = []
if self.obj_type not in container_tags:
return
for c in self.node.childNodes:
if is_child_rsc(c):
child = cib_factory.find_object_for_node(c)
if not child:
missing_obj_err(c)
continue
child.parent = self
self.children.append(child)
if not c.isSameNode(child.node):
child.node.parentNode.removeChild(child.node)
child.node.unlink()
child.node = c
def update_from_cli(self,cli_list):
'Update ourselves from the cli intermediate.'
if not cib_factory.verify_cli(cli_list):
return False
oldnode = self.node
id_store.remove_xml(oldnode)
newnode = self.cli2node(cli_list)
if not newnode:
id_store.store_xml(oldnode)
return False
if xml_cmp(oldnode,newnode):
newnode.unlink()
return True # the new and the old versions are equal
oldnode.parentNode.replaceChild(newnode,oldnode)
self.node = newnode
cib_factory.adjust_children(self,cli_list)
oldnode.unlink()
self.updated = True
self.propagate_updated()
return True
def update_from_node(self,node):
'Update ourselves from a doc node.'
if not node:
return False
oldxml = self.node
newxml = node
if xml_cmp(oldxml,newxml):
return True # the new and the old versions are equal
if not id_store.replace_xml(oldxml,newxml):
return False
oldxml.unlink()
self.node = cib_factory.doc.importNode(newxml,1)
cib_factory.topnode[self.parent_type].appendChild(self.node)
self.update_links()
self.updated = True
self.propagate_updated()
def top_parent(self):
'''Return the top parent or self'''
if self.parent:
return self.parent.top_parent()
else:
return self
def find_child_in_node(self,child):
for c in self.node.childNodes:
if not is_element(c):
continue
if c.tagName == child.obj_type and \
c.getAttribute("id") == child.obj_id:
return c
return None
def filter(self,*args):
"Filter objects."
if not args:
return True
if args[0] == "NOOBJ":
return False
if args[0] == "changed":
return self.updated or self.origin == "user"
return self.obj_id in args
def mk_cli_list(cli):
'Sometimes we get a string and sometimes a list.'
if type(cli) == type('') or type(cli) == type(u''):
return parse_cli(cli)
else:
return cli
class CibNode(CibObject):
'''
Node and node's attributes.
'''
default_type = "normal"
node_attributes_keyw = "attributes"
def repr_cli(self,node = None,format = True):
'''
We assume that uname is unique.
'''
if not node:
node = self.node
l = []
l.append(node_head(node))
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName == "instance_attributes":
l.append("%s %s" % \
(cli_display.keyword("attributes"), \
cli_pairs(nvpairs2list(c))))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = self.node
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
obj_id = find_value(head[1],"$id")
if not obj_id:
obj_id = find_value(head[1],"uname")
if not obj_id:
return None
type = find_value(head[1],"type")
if not type:
type = self.default_type
head[1].append(["type",type])
headnode = mkxmlsimple(head,cib_factory.topnode[cib_object_map[self.xml_obj_type][2]],'node')
id_hint = headnode.getAttribute("id")
for e in cli_list[1:]:
n = mkxmlnode(e,oldnode,id_hint)
headnode.appendChild(n)
remove_id_used_attributes(cib_factory.topnode[cib_object_map[self.xml_obj_type][2]])
return headnode
class CibPrimitive(CibObject):
'''
Primitives.
'''
def repr_cli(self,node = None,format = True):
if not node:
node = self.node
l = []
l.append(primitive_head(node))
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName == "instance_attributes":
l.append("%s %s" % \
(cli_display.keyword("params"), \
cli_pairs(nvpairs2list(c))))
elif c.tagName == "meta_attributes":
l.append("%s %s" % \
(cli_display.keyword("meta"), \
cli_pairs(nvpairs2list(c))))
elif c.tagName == "operations":
l.append(cli_operations(c,format))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
'''
Convert a CLI description to DOM node.
Try to preserve as many ids as possible in case there's
an old XML version.
'''
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = self.node
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
headnode = mkxmlsimple(head,oldnode,'rsc')
id_hint = headnode.getAttribute("id")
operations = None
for e in cli_list[1:]:
n = mkxmlnode(e,oldnode,id_hint)
if e[0] == "operations":
operations = n
if e[0] != "op":
headnode.appendChild(n)
else:
if not operations:
operations = mkxmlnode(["operations",{}],oldnode,id_hint)
headnode.appendChild(operations)
operations.appendChild(n)
remove_id_used_attributes(oldnode)
return headnode
class CibContainer(CibObject):
'''
Groups and clones and ms.
'''
def repr_cli(self,node = None,format = True):
if not node:
node = self.node
l = []
l.append(cont_head(node))
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName == "instance_attributes":
l.append("%s %s" % \
(cli_display.keyword("params"), \
cli_pairs(nvpairs2list(c))))
elif c.tagName == "meta_attributes":
l.append("%s %s" % \
(cli_display.keyword("meta"), \
cli_pairs(nvpairs2list(c))))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = self.node
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
headnode = mkxmlsimple(head,oldnode,'grp')
id_hint = headnode.getAttribute("id")
for e in cli_list[1:]:
n = mkxmlnode(e,oldnode,id_hint)
headnode.appendChild(n)
v = find_value(head[1],"$children")
if v:
for child_id in v:
obj = cib_factory.find_object(child_id)
if obj:
n = obj.node.cloneNode(1)
headnode.appendChild(n)
else:
no_object_err(child_id)
remove_id_used_attributes(oldnode)
return headnode
class CibLocation(CibObject):
'''
Location constraint.
'''
def repr_cli(self,node = None,format = True):
if not node:
node = self.node
l = []
l.append(location_head(node))
for c in node.childNodes:
if not is_element(c):
continue
if c.tagName == "rule":
l.append("%s %s" % \
(cli_display.keyword("rule"), cli_rule(c)))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = self.node
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
headnode = mkxmlsimple(head,oldnode,'location')
id_hint = headnode.getAttribute("id")
oldrule = None
for e in cli_list[1:]:
- if e[0] == "expression":
+ if e[0] in ("expression","date_expression"):
n = mkxmlnode(e,oldrule,id_hint)
else:
n = mkxmlnode(e,oldnode,id_hint)
if e[0] == "rule":
add_missing_attr(n)
rule = n
headnode.appendChild(n)
oldrule = lookup_node(rule,oldnode,location_only=True)
else:
rule.appendChild(n)
remove_id_used_attributes(oldnode)
return headnode
class CibSimpleConstraint(CibObject):
'''
Colocation and order constraints.
'''
def repr_cli(self,node = None,format = True):
if not node:
node = self.node
l = []
l.append(simple_constraint_head(node))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = self.node
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
headnode = mkxmlsimple(head,oldnode,'')
return headnode
class CibProperty(CibObject):
'''
Cluster properties.
'''
def repr_cli(self,node = None,format = True):
if not node:
node = self.node
l = []
l.append(cli_display.keyword(self.obj_type))
properties = nvpairs2list(node, add_id = True)
for n,v in properties:
if n == "$id":
l[0] = '%s %s="%s"' % (l[0],n,v)
else:
l.append(nvpair_format(n,v))
return cli_format(l,format)
def cli2node(self,cli,oldnode = None):
cli_list = mk_cli_list(cli)
if not cli_list:
return None
if not oldnode:
oldnode = cib_factory.topnode[cib_object_map[self.xml_obj_type][2]]
head = copy.copy(cli_list[0])
head[0] = backtrans[head[0]]
obj_id = find_value(head[1],"$id")
if not obj_id:
obj_id = cib_object_map[self.xml_obj_type][3]
headnode = mkxmlnode(head,oldnode,obj_id)
remove_id_used_attributes(oldnode)
return headnode
def matchcli(self,cli_list):
head = cli_list[0]
return self.obj_type == head[0] \
and self.obj_id == find_value(head[1],"$id")
# xml -> cli translations (and classes)
cib_object_map = {
"node": ( "node", CibNode, "nodes" ),
"primitive": ( "primitive", CibPrimitive, "resources" ),
"group": ( "group", CibContainer, "resources" ),
"clone": ( "clone", CibContainer, "resources" ),
"master": ( "ms", CibContainer, "resources" ),
"rsc_location": ( "location", CibLocation, "constraints" ),
"rsc_colocation": ( "colocation", CibSimpleConstraint, "constraints" ),
"rsc_order": ( "order", CibSimpleConstraint, "constraints" ),
"cluster_property_set": ( "property", CibProperty, "crm_config", "cib-bootstrap-options" ),
"rsc_defaults": ( "rsc_defaults", CibProperty, "rsc_defaults", "rsc-options" ),
"op_defaults": ( "op_defaults", CibProperty, "op_defaults", "op-options" ),
}
backtrans = {} # generate a translation cli -> tag
for key in cib_object_map:
backtrans[cib_object_map[key][0]] = key
cib_topnodes = [] # get a list of parents
for key in cib_object_map:
if not cib_object_map[key][2] in cib_topnodes:
cib_topnodes.append(cib_object_map[key][2])
class CibFactory(object):
'''
Juggle with CIB objects.
See check_structure below for details on the internal cib
representation.
'''
def __init__(self):
self.init_vars()
self.regtest = regression_tests
self.all_committed = True # has commit produced error
self.supported_cib_re = "^pacemaker-1[.]0$"
def is_cib_sane(self):
if not self.doc:
empty_cib_err()
return False
return True
#
# check internal structures
#
def check_topnode(self,obj):
if not obj.node.parentNode.isSameNode(self.topnode[obj.parent_type]):
common_err("object %s is not linked to %s"%(obj.obj_id,obj.parent_type))
def check_parent(self,obj,parent):
if not obj in parent.children:
common_err("object %s does not reference its child %s"%(parent.obj_id,obj.obj_id))
return False
if not parent.node.isSameNode(obj.node.parentNode):
common_err("object %s node is not a child of its parent %s, but %s:%s"%(obj.obj_id,parent.obj_id,obj.node.tagName,obj.node.getAttribute("id")))
return False
def check_structure(self):
#print "Checking structure..."
if not self.doc:
empty_cib_err()
return False
rc = True
for obj in self.cib_objects:
#print "Checking %s... (%s)" % (obj.obj_id,obj.nocli)
if obj.parent:
if self.check_parent(obj,obj.parent) == False:
rc = False
else:
if self.check_topnode(obj) == False:
rc = False
for child in obj.children:
if self.check_parent(child,child.parent) == False:
rc = False
return rc
def regression_testing(self,param):
# provide some help for regression testing
# in particular by trying to provide output which is
# easier to predict
if param == "off":
self.regtest = False
elif param == "on":
self.regtest = True
else:
common_warn("bad parameter for regtest: %s" % param)
def createElement(self,tag):
if self.doc:
return self.doc.createElement(tag)
else:
empty_cib_err()
def is_cib_supported(self,cib):
'Do we support this CIB?'
req = cib.getAttribute("crm_feature_set")
validator = cib.getAttribute("validate-with")
if validator and re.match(self.supported_cib_re,validator):
return True
cib_ver_unsupported_err(validator,req)
return False
def upgrade_cib_06to10(self,force = False):
'Upgrade the CIB from 0.6 to 1.0.'
if not self.doc:
empty_cib_err()
return False
req = self.doc.getAttribute("crm_feature_set")
validator = self.doc.getAttribute("validate-with")
if force or not validator or re.match("0[.]6",validator):
return ext_cmd(cib_upgrade) == 0
def import_cib(self):
'Parse the current CIB (from cibadmin -Q).'
self.doc,cib = read_cib(cib_dump)
if not self.doc:
return False
if not cib:
common_err("CIB has no cib element")
self.reset()
return False
if not self.is_cib_supported(cib):
self.reset()
return False
for attr in cib.attributes.keys():
self.cib_attrs[attr] = cib.getAttribute(attr)
for t in cib_topnodes:
self.topnode[t] = get_conf_elem(self.doc, t)
if not self.topnode[t]:
self.topnode[t] = mk_topnode(self.doc, t)
self.missing_topnodes.append(t)
if not self.topnode[t]:
common_err("could not create %s node; out of memory?" % t)
self.reset()
return False
return True
#
# create a doc from the list of objects
# (used by CibObjectSetRaw)
#
def regtest_filter(self,cib):
for attr in ("epoch","admin_epoch"):
if cib.getAttribute(attr):
cib.setAttribute(attr,"0")
for attr in ("cib-last-written",):
if cib.getAttribute(attr):
cib.removeAttribute(attr)
def set_cib_attributes(self,cib):
for attr in self.cib_attrs:
cib.setAttribute(attr,self.cib_attrs[attr])
if self.regtest:
self.regtest_filter(cib)
def objlist2doc(self,obj_list,obj_filter = None):
'''
Return document containing objects in obj_list.
Must remove all children from the object list, because
printing xml of parents will include them.
Optional filter to sieve objects.
'''
doc,cib,crm_config,rsc_defaults,op_defaults,nodes,resources,constraints = new_cib()
# get only top parents for the objects in the list
# e.g. if we get a primitive which is part of a clone,
# then the clone gets in, not the primitive
# dict will weed out duplicates
d = {}
for obj in obj_list:
if obj_filter and not obj_filter(obj):
continue
d[obj.top_parent()] = 1
for obj in d:
i_node = doc.importNode(obj.node,1)
if obj.parent_type == "nodes":
nodes.appendChild(i_node)
elif obj.parent_type == "resources":
resources.appendChild(i_node)
elif obj.parent_type == "constraints":
constraints.appendChild(i_node)
elif obj.parent_type == "crm_config":
crm_config.appendChild(i_node)
elif obj.parent_type == "rsc_defaults":
rsc_defaults.appendChild(i_node)
elif obj.parent_type == "op_defaults":
op_defaults.appendChild(i_node)
self.set_cib_attributes(cib)
return doc
#
# commit changed objects to the CIB
#
def attr_match(self,c,a):
'Does attribute match?'
try: cib_attr = self.cib_attrs[a]
except: cib_attr = None
return c.getAttribute(a) == cib_attr
def is_current_cib_equal(self, silent = False):
curr_cib = read_cib(cib_dump)
doc = curr_cib[0]
if not doc:
return False
cib = curr_cib[1]
if not cib:
doc.unlink()
return False
rc = self.attr_match(cib,'epoch') and \
self.attr_match(cib,'admin_epoch')
if not silent and not rc:
common_warn("CIB changed in the meantime: won't touch it!")
common_info("use 'commit force' to force the changes.")
doc.unlink()
return rc
def add_missing_topnodes(self):
cib_create_topnode = "cibadmin -C -o configuration -X"
for tag in self.missing_topnodes:
if not self.topnode[tag].hasChildNodes():
continue
if ext_cmd("%s '<%s/>'" % (cib_create_topnode, tag)) != 0:
common_error("could not create %s in the cib" % tag)
return False
return True
def commit(self,force = False):
'Commit the configuration to the CIB.'
if not self.doc:
empty_cib_err()
return False
# 0. ensure that cib didn't change in the meantime
if not force and not self.overwrite:
if not self.is_current_cib_equal():
return False
if not self.add_missing_topnodes():
return False
self.all_committed = True
cnt = 0
# 1. remove objects
cnt += self.delete_objects()
# 2. create objects
cnt += self.update_objects(lambda o: o.origin == 'user')
# 3. replace objects
cnt += self.replace_objects(lambda o: o.origin != 'user' and o.updated)
if cnt:
# reload the cib!
self.reset()
self.initialize()
return self.all_committed
def cib_objs4cibadmin(self,obj_filter):
'''
Filter objects from our cib_objects list. But add only
top parents.
For this to work, the filter must not filter out parents.
That's guaranteed by the updated flag propagation.
'''
upd_list = []
for obj in self.cib_objects:
if not obj_filter or obj_filter(obj):
if not obj.parent and not obj in upd_list:
upd_list.append(obj)
return upd_list
def delete_objects(self):
cnt = 0
if not self.remove_queue:
return 0
obj_list = processing_sort_cli(self.remove_queue)
for obj in reversed(obj_list):
if obj.xml_obj_type in defaults_tags:
node = self.createElement("meta_attributes")
else:
node = self.createElement(obj.xml_obj_type)
node.setAttribute("id",obj.obj_id)
#print node.toprettyxml()
rc = pipe_string("%s -D"%cib_piped,node.toxml())
if not rc:
self.remove_queue.remove(obj)
cnt += 1
else:
update_err(obj.obj_id,'-D',node.toprettyxml())
self.all_committed = False
node.unlink()
return cnt
def update_objects(self,obj_filter):
upd_list = self.cib_objs4cibadmin(obj_filter)
l = [x.obj_id for x in upd_list]
if not l:
return 0
o = CibObjectSetRaw(*l)
xml = o.repr_configure()
rc = pipe_string("%s -U" % cib_piped, xml)
if rc == 0:
for obj in upd_list:
obj.reset_updated()
return len(upd_list)
else:
update_err(' '.join(l),'-U',xml)
return 0
def replace_objects(self,obj_filter):
cnt = 0
upd_list = self.cib_objs4cibadmin(obj_filter)
if not upd_list:
return 0
for obj in processing_sort_cli(upd_list):
#print obj.node.toprettyxml()
rc = pipe_string("%s -R -o %s" % \
(cib_piped,obj.parent_type),obj.node.toxml())
if rc == 0:
cnt += 1
obj.reset_updated()
else:
update_err(obj.obj_id,'-R',obj.node.toprettyxml())
self.all_committed = False
return cnt
#
# initialize cib_objects from CIB
#
def save_node(self,node,pnode = None):
if not pnode:
pnode = node
obj = cib_object_map[pnode.tagName][1](pnode.tagName)
obj.origin = "cib"
self.cib_objects.append(obj)
if not obj.save_xml(node):
obj.nocli = True
def populate(self):
"Walk the cib and collect cib objects."
all_nodes = get_interesting_nodes(self.doc,[])
if not all_nodes:
return
for node in processing_sort(all_nodes):
if is_defaults(node):
for c in node.childNodes:
if not is_element(c) or c.tagName != "meta_attributes":
continue
self.save_node(c,node)
else:
self.save_node(node)
for obj in self.cib_objects:
obj.update_links()
def initialize(self):
if self.doc:
return True
if not self.import_cib():
return False
sanitize_cib(self.doc)
show_unrecognized_elems(self.doc)
self.populate()
return self.check_structure()
def init_vars(self):
self.doc = None # the cib
self.topnode = {}
for t in cib_topnodes:
self.topnode[t] = None
self.missing_topnodes = []
self.cib_attrs = {} # cib version dictionary
self.cib_objects = [] # a list of cib objects
self.remove_queue = [] # a list of cib objects to be removed
self.overwrite = False # update cib unconditionally
def reset(self):
if not self.doc:
return
self.doc.unlink()
self.init_vars()
id_store.clear()
def find_object(self,obj_id):
"Find an object for id."
for obj in self.cib_objects:
if obj.obj_id == obj_id:
return obj
return None
#
# tab completion functions
#
def id_list(self):
"List of ids (for completion)."
return [x.obj_id for x in self.cib_objects]
def prim_id_list(self):
"List of primitives ids (for group completion)."
return [x.obj_id for x in self.cib_objects if x.obj_type == "primitive"]
def children_id_list(self):
"List of child ids (for clone/master completion)."
return [x.obj_id for x in self.cib_objects if x.obj_type in children_tags]
def rsc_id_list(self):
"List of resource ids (for constraint completion)."
return [x.obj_id for x in self.cib_objects \
if x.obj_type in resource_tags and not x.parent]
def f_prim_id_list(self):
"List of possible primitives ids (for group completion)."
return [x.obj_id for x in self.cib_objects \
if x.obj_type == "primitive" and not x.parent]
def f_children_id_list(self):
"List of possible child ids (for clone/master completion)."
return [x.obj_id for x in self.cib_objects \
if x.obj_type in children_tags and not x.parent]
#
# a few helper functions
#
def find_object_for_node(self,node):
"Find an object which matches a dom node."
for obj in self.cib_objects:
if node.getAttribute("id") == obj.obj_id:
return obj
return None
def resolve_id_ref(self,attr_list_type,id_ref):
'''
User is allowed to specify id_ref either as a an object
id or as attributes id. Here we try to figure out which
one, i.e. if the former is the case to find the right
id to reference.
'''
obj= self.find_object(id_ref)
if obj:
node_l = obj.node.getElementsByTagName(attr_list_type)
if node_l:
if len(node_l) > 1:
common_warn("%s contains more than one %s, using first" % \
(obj.obj_id,attr_list_type))
id = node_l[0].getAttribute("id")
if not id:
common_err("%s reference not found" % id_ref)
return id_ref # hope that user will fix that
return id
# verify if id_ref exists
node_l = self.doc.getElementsByTagName(attr_list_type)
for node in node_l:
if node.getAttribute("id") == id_ref:
return id_ref
common_err("%s reference not found" % id_ref)
return id_ref # hope that user will fix that
def new_object(self,obj_type,obj_id):
"Create a new object of type obj_type."
if id_in_use(obj_id):
return None
for xml_obj_type,v in cib_object_map.items():
if v[0] == obj_type:
obj = v[1](xml_obj_type,obj_id)
if obj.obj_id:
return obj
else:
return None
return None
def mkobj_list(self,mode,*args):
obj_list = []
for obj in self.cib_objects:
f = lambda: obj.filter(*args)
if not f():
continue
if mode == "cli" and obj.nocli:
obj_cli_err(obj.obj_id)
continue
obj_list.append(obj)
return obj_list
def has_cib_changed(self):
return self.mkobj_list("xml","changed") or self.remove_queue
def verify_constraints(self,cli_list):
'''
Check if all resources referenced in a constraint exist
'''
rc = True
head = cli_list[0]
constraint_id = find_value(head[1],"id")
for obj_id in referenced_resources_cli(cli_list):
if not self.find_object(obj_id):
constraint_norefobj_err(constraint_id,obj_id)
rc = False
return rc
def verify_children(self,cli_list):
'''
Check prerequisites:
a) all children must exist
b) no child may have other parent than me
(or should we steal children?)
'''
head = cli_list[0]
obj_type = head[0]
obj_id = find_value(head[1],"id")
c_ids = find_value(head[1],"$children")
if not c_ids:
return True
for child_id in c_ids:
if not self.verify_child(child_id,obj_type,obj_id):
return False
return True
def verify_child(self,child_id,obj_type,obj_id):
'Check if child exists and obj_id is (or may become) its parent.'
child = self.find_object(child_id)
if not child:
no_object_err(child_id)
return False
if child.parent and child.parent.obj_id != obj_id:
common_err("%s already in use at %s"%(child_id,child.parent.obj_id))
return False
if obj_type == "group" and child.obj_type != "primitive":
common_err("a group may contain only primitives; %s is %s"%(child_id,child.obj_type))
return False
if not child.obj_type in children_tags:
common_err("%s may contain a primitive or a group; %s is %s"%(obj_type,child_id,child.obj_type))
return False
return True
def verify_cli(self,cli_list):
'''
Can we create this object given its CLI representation.
This is not about syntax, we're past that, but about
semantics.
Right now we check if the children, if any, are fit for
the parent. And if this is a constraint, if all
referenced resources are present.
'''
rc = True
if not self.verify_children(cli_list):
rc = False
if not self.verify_constraints(cli_list):
rc = False
return rc
def create_object(self,*args):
return self.create_from_cli(parse_cli(args))
def set_property_cli(self,cli_list):
head_pl = cli_list[0]
obj_type = head_pl[0]
pset_id = find_value(head_pl[1],"$id")
if pset_id:
head_pl[1].remove(["$id",pset_id])
else:
pset_id = cib_object_map[backtrans[obj_type]][3]
obj = self.find_object(pset_id)
if not obj:
if not is_id_valid(pset_id):
invalid_id_err(pset_id)
return False
obj = self.new_object(obj_type,pset_id)
if not obj:
return False
self.topnode[obj.parent_type].appendChild(obj.node)
obj.origin = "user"
self.cib_objects.append(obj)
for n,v in head_pl[1]:
set_nvpair(obj.node,n,v)
obj.updated = True
def add_op(self,cli_list):
'''Add an op to a primitive.'''
head = cli_list[0]
# does the referenced primitive exist
rsc_id = find_value(head[1],"rsc")
rsc_obj = cib_factory.find_object(rsc_id)
if not rsc_obj:
no_object_err(rsc_id)
return False
if rsc_obj.obj_type != "primitive":
common_err("%s is not a primitive" % rsc_id)
return False
# check if there is already an op with the same interval
name = find_value(head[1], "name")
interval = find_value(head[1], "interval")
if find_operation(rsc_obj.node,name,interval):
common_err("%s already has a %s op with interval %s" % \
(rsc_id, name, interval))
return False
# drop the rsc attribute
head[1].remove(["rsc",rsc_id])
# create an xml node
mon_node = mkxmlsimple(head, None, rsc_id)
# get the place to append it to
try:
op_node = rsc_obj.node.getElementsByTagName("operations")[0]
except:
op_node = self.createElement("operations")
rsc_obj.node.appendChild(op_node)
op_node.appendChild(mon_node)
# the resource is updated
rsc_obj.updated = True
rsc_obj.propagate_updated()
def create_from_cli(self,cli):
'Create a new cib object from the cli representation.'
cli_list = mk_cli_list(cli)
if not cli_list:
return False
if not self.verify_cli(cli_list):
return False
head = cli_list[0]
obj_type = head[0]
if obj_type == "property" or obj_type in defaults_tags:
return self.set_property_cli(cli_list)
if obj_type == "op":
return self.add_op(cli_list)
obj_id = find_value(head[1],"id")
if not is_id_valid(obj_id):
invalid_id_err(obj_id)
return False
obj = self.new_object(obj_type,obj_id)
if not obj:
return False
obj.node = obj.cli2node(cli_list)
self.topnode[obj.parent_type].appendChild(obj.node)
self.adjust_children(obj,cli_list)
obj.origin = "user"
for child in obj.children:
# redirect constraints to the new parent
for c_obj in self.related_constraints(child):
self.remove_queue.append(c_obj.mkcopy())
rename_rscref(c_obj.node,child.obj_id,obj.obj_id)
c_obj.origin = "user"
c_obj.updated = True
# children (if any) have to be removed
# in case they originated from the CIB!
self.add_to_remove_queue(child)
# drop useless constraints which may have been created above
for c_obj in self.related_constraints(obj):
if silly_constraint(c_obj.node,obj.obj_id):
self._remove_obj(c_obj)
self.cib_objects.append(obj)
def adjust_children(self,obj,cli_list):
'''
All stuff children related: manage the nodes of children,
update the list of children for the parent, update
parents in the children.
'''
head = cli_list[0]
children_ids = find_value(head[1],"$children")
if not children_ids:
return
new_children = []
for child_id in children_ids:
new_children.append(self.find_object(child_id))
self._relink_orphans(obj,new_children)
obj.children = new_children
self._update_children(obj)
def _relink_child(self,obj):
'Relink a child to the top node.'
obj.node.parentNode.removeChild(obj.node)
self.topnode[obj.parent_type].appendChild(obj.node)
obj.parent = None
obj.origin = "user" # it has to be created!
def _update_children(self,obj):
'''For composite objects: update all children nodes.
'''
# unlink all and find them in the new node
for child in obj.children:
oldnode = child.node
child.node = obj.find_child_in_node(child)
if child.children: # and children of children
self._update_children(child)
oldnode.parentNode.removeChild(oldnode)
oldnode.unlink()
child.parent = obj
def _relink_orphans(self,obj,new_children):
"New orphans move to the top level for the object type."
for child in obj.children:
if child not in new_children:
self._relink_child(child)
def add_obj(self,obj_type,node):
obj = self.new_object(obj_type, node.getAttribute("id"))
if not obj:
return None
if not obj.save_xml(node):
obj.nocli = True
obj.update_links()
obj.origin = "user"
self.cib_objects.append(obj)
return obj
def create_from_node(self,node):
'Create a new cib object from a document node.'
if not node:
return True
obj_type = cib_object_map[node.tagName][0]
node = self.doc.importNode(node,1)
obj = None
if is_defaults(node):
for c in node.childNodes:
if not is_element(c) or c.tagName != "meta_attributes":
continue
obj = self.add_obj(obj_type,c)
else:
obj = self.add_obj(obj_type,node)
if obj:
self.topnode[obj.parent_type].appendChild(node)
return obj != None
def cib_objects_string(self, obj_list = None):
l = []
if not obj_list:
obj_list = self.cib_objects
for obj in obj_list:
l.append(obj.obj_string())
return ' '.join(l)
def _remove_obj(self,obj):
"Remove a cib object and its children."
# remove children first
# can't remove them here from obj.children!
for child in obj.children:
#self._remove_obj(child)
# just relink, don't remove children
self._relink_child(child)
if obj.parent: # remove obj from its parent, if any
obj.parent.children.remove(obj)
id_store.remove_xml(obj.node)
obj.node.parentNode.removeChild(obj.node)
obj.node.unlink()
self.add_to_remove_queue(obj)
self.cib_objects.remove(obj)
for constraint in self.related_constraints(obj):
self._remove_obj(constraint)
def related_constraints(self,obj):
if not is_resource(obj.node):
return []
c_list = []
for obj2 in self.cib_objects:
if not is_constraint(obj2.node):
continue
if rsc_constraint(obj.obj_id,obj2.node):
c_list.append(obj2)
return c_list
def add_to_remove_queue(self,obj):
if obj.origin == "cib":
self.remove_queue.append(obj)
#print self.cib_objects_string(self.remove_queue)
def delete_1(self,obj):
'''
Remove an object and its parent in case the object is the
only child.
'''
if obj.parent and len(obj.parent.children) == 1:
self.delete_1(obj.parent)
if obj in self.cib_objects: # don't remove parents twice
self._remove_obj(obj)
def delete(self,*args):
'Delete a cib object.'
if not self.doc:
empty_cib_err()
return False
rc = True
l = []
for obj_id in args:
obj = self.find_object(obj_id)
if not obj:
no_object_err(obj_id)
rc = False
continue
if is_rsc_running(obj_id):
common_warn("resource %s is running, can't delete it" % obj_id)
else:
l.append(obj)
if l:
l = processing_sort_cli(l)
for obj in reversed(l):
self.delete_1(obj)
return rc
def remove_on_rename(self,obj):
'''
If the renamed object is coming from the cib, then it
must be removed and a new one created.
'''
if obj.origin == "cib":
self.remove_queue.append(obj.mkcopy())
obj.origin = "user"
def rename(self,old_id,new_id):
'''
Rename a cib object.
- check if the resource (if it's a resource) is stopped
- check if the new id is not taken
- find the object with old id
- rename old id to new id in all related objects
(constraints)
- if the object came from the CIB, then it must be
deleted and the one with the new name created
- rename old id to new id in the object
'''
if not self.doc:
empty_cib_err()
return False
if id_in_use(new_id):
return False
obj = self.find_object(old_id)
if not obj:
no_object_err(old_id)
return False
if not obj.can_be_renamed():
return False
for c_obj in self.related_constraints(obj):
rename_rscref(c_obj.node,old_id,new_id)
c_obj.updated = True
self.remove_on_rename(obj)
rename_id(obj.node,old_id,new_id)
obj.obj_id = new_id
id_store.rename(old_id,new_id)
obj.updated = True
obj.propagate_updated()
def erase(self):
"Remove all cib objects."
# remove only bottom objects and no constraints
# the rest will automatically follow
if not self.doc:
empty_cib_err()
return False
erase_ok = True
l = []
for obj in [obj for obj in self.cib_objects \
if not obj.children and not is_constraint(obj.node) \
and obj.obj_type != "node" ]:
if is_rsc_running(obj.obj_id):
common_warn("resource %s is running, can't delete it" % obj.obj_id)
erase_ok = False
else:
l.append(obj)
if not erase_ok:
common_err("CIB erase aborted (nothing was deleted)")
return False
for obj in l:
self.delete(obj.obj_id)
remaining = 0
for obj in self.cib_objects:
if obj.obj_type != "node":
remaining += 1
if remaining > 0:
common_err("strange, but these objects remained:")
for obj in self.cib_objects:
if obj.obj_type != "node":
print >> sys.stderr, obj.obj_string()
self.cib_objects = []
return True
def erase_nodes(self):
"Remove nodes only."
if not self.doc:
empty_cib_err()
return False
l = [obj for obj in self.cib_objects if obj.obj_type == "node"]
for obj in l:
self.delete(obj.obj_id)
def refresh(self):
"Refresh from the CIB."
self.reset()
self.initialize()
class TopLevel(object):
'''
The top level.
'''
help_table = odict()
help_table["."] = ("","""This is the CRM command line interface program.""")
help_table["cib"] = ("manage shadow CIBs", """
A shadow CIB is a regular cluster configuration which is kept in
a file. The CRM and the CRM tools may manage a shadow CIB in the
same way as the live CIB (i.e. the current cluster configuration).
A shadow CIB may be applied to the cluster in one step.
""")
help_table["resource"] = ("resources management", """
Everything related to resources management is available at this
level. Most commands are implemented using the crm_resource(8)
program.
""")
help_table["node"] = ("nodes management", """
A few node related tasks such as node standby are implemented
here.
""")
help_table["options"] = ("user preferences", """
Several user preferences are available. Note that it is possible
to save the preferences to a startup file.
""")
help_table["configure"] = ("CRM cluster configuration", """
The configuration level.
Note that you can change the working CIB at the cib level. It is
advisable to configure shadow CIBs and then commit them to the
cluster.
""")
help_table["quit"] = ("exit the program", "")
help_table["help"] = ("show help", "")
help_table["end"] = ("go back one level", "")
cmd_aliases = global_aliases
def __init__(self):
self.cmd_table = {
'cib': CibShadow,
'resource': RscMgmt,
'configure': CibConfig,
'node': NodeMgmt,
'options': CliOptions,
'status': (self.status,(0,0),0),
'ra': RA,
'quit': (cmd_exit,(0,0),0),
'help': (self.help,(0,1),0),
'end': (cmd_end,(0,1),0),
}
setup_aliases(self)
def help(self,cmd,topic = ''):
cmd_help(self.help_table,topic)
def status(self,cmd):
return ext_cmd("crm_mon -1") == 0
class CompletionHelp(object):
'''
Print some help on whatever last word in the line.
'''
timeout = 60 # don't print again and again
def __init__(self):
self.laststamp = 0
self.lastitem = ''
def help(self,f,*args):
words = readline.get_line_buffer().split()
if not words:
return
key = words[-1]
if key.endswith('='):
key = key[0:-1]
if self.lastitem == key and \
time.time() - self.laststamp < self.timeout:
return
help_s = f(key,*args)
if help_s:
print "\n%s" % help_s
print "%s%s" % (prompt,readline.get_line_buffer()),
self.laststamp = time.time()
self.lastitem = key
def attr_cmds(idx,delimiter = False):
if delimiter:
return ' '
return ["delete","set","show"]
def listnodes():
if wcache.is_cached("listnodes"):
return wcache.retrieve("listnodes")
nodes = []
doc = xml2doc("%s -o nodes"%cib_dump)
if not doc:
return []
nodes_node = get_conf_elem(doc, "nodes")
if not nodes_node:
return []
for c in nodes_node.childNodes:
if not is_element(c):
continue
if c.tagName != "node":
continue
if c.getAttribute("type") == 'normal':
nodes.append(c.getAttribute("uname"))
return wcache.store("property_list",nodes)
def nodes_list(idx,delimiter = False):
if delimiter:
return ' '
return listnodes()
def shadows_list(idx,delimiter = False):
if delimiter:
return ' '
return listshadows()
def templates_list(idx,delimiter = False):
if delimiter:
return ' '
return listtemplates()
def config_list(idx,delimiter = False):
if delimiter:
return ' '
return listconfigs()
def shadows_live_list(idx,delimiter = False):
if delimiter:
return ' '
return listshadows() + ['live']
def rsc_list(idx,delimiter = False):
if delimiter:
return ' '
doc = resources_xml()
if not doc:
return []
nodes = get_interesting_nodes(doc,[])
return [x.getAttribute("id") for x in nodes if is_resource(x)]
def null_list(idx,delimiter = False):
if delimiter:
return ' '
return []
def loop(idx,delimiter = False):
"just a marker in a list"
pass
def id_xml_list(idx,delimiter = False):
if delimiter:
return ' '
return cib_factory.id_list() + ['xml','changed']
def id_list(idx,delimiter = False):
if delimiter:
return ' '
return cib_factory.id_list()
def f_prim_id_list(idx,delimiter = False):
if delimiter:
return ' '
return cib_factory.f_prim_id_list()
def f_children_id_list(idx,delimiter = False):
if delimiter:
return ' '
return cib_factory.f_children_id_list()
def rsc_id_list(idx,delimiter = False):
if delimiter:
return ' '
return cib_factory.rsc_id_list()
def skills_list(idx,delimiter = False):
if delimiter:
return ' '
return CliOptions.skill_levels.keys()
def ra_classes_list(idx,delimiter = False):
if delimiter:
return ':'
return ra_classes()
def get_primitive_type(words):
try:
idx = words.index("primitive") + 2
type_word = words[idx]
except: type_word = ''
return type_word
def ra_type_list(toks,idx,delimiter):
if idx == 2:
if toks[0] == "ocf":
dchar = ':'
l = ra_providers_all()
else:
dchar = ' '
l = ra_types(toks[0])
elif idx == 3:
dchar = ' '
if toks[0] == "ocf":
l = ra_types(toks[0],toks[1])
else:
l = ra_types(toks[0])
if delimiter:
return dchar
return l
def prim_meta_attr_list():
return [\
"globally-unique", \
"is-managed", \
"migration-threshold", \
"priority", \
"multiple-active", \
"failure-timeout", \
"resource-stickiness", \
"target-role", \
]
def op_attr_list():
return op_attributes
def operations_list():
return ["start","stop","monitor"]
def prim_complete_meta(ra,delimiter):
if delimiter:
return '='
return prim_meta_attr_list()
def prim_complete_op(ra,delimiter):
words = split_buffer()
if (readline.get_line_buffer()[-1] == ' ' and words[-1] == "op") \
or (readline.get_line_buffer()[-1] != ' ' and words[-2] == "op"):
dchar = ' '
l = operations_list()
else:
if readline.get_line_buffer()[-1] == '=':
dchar = ' '
l = []
else:
dchar = '='
l = op_attr_list()
if delimiter:
return dchar
return l
def prim_complete_params(ra,delimiter):
if readline.get_line_buffer()[-1] == '=':
dchar = ' '
l = []
else:
dchar = '='
l = ra.params().keys()
if delimiter:
return dchar
return l
def prim_params_info(key,ra):
return ra.meta_parameter(key)
def meta_attr_info(key,ra):
pass
def op_attr_info(key,ra):
pass
def get_lastkeyw(words,keyw):
revwords = copy.copy(words)
revwords.reverse()
for w in revwords:
if w in keyw:
return w
def primitive_complete_complex(idx,delimiter = False):
'''
This completer depends on the content of the line, i.e. on
previous tokens, in particular on the type of the RA.
'''
completers_set = {
"params": (prim_complete_params, prim_params_info),
"meta": (prim_complete_meta, meta_attr_info),
"op": (prim_complete_op, op_attr_info),
}
# manage the resource type
words = readline.get_line_buffer().split()
type_word = get_primitive_type(words)
toks = type_word.split(':')
if toks[0] != "ocf":
idx += 1
if idx in (2,3):
return ra_type_list(toks,idx,delimiter)
# create an ra object
ra = None
ra_class,provider,rsc_type = disambiguate_ra_type(type_word)
if ra_type_validate(type_word,ra_class,provider,rsc_type):
ra = RAInfo(ra_class,rsc_type,provider)
keywords = completers_set.keys()
if idx == 4:
if delimiter:
return ' '
return keywords
lastkeyw = get_lastkeyw(words,keywords)
if '=' in words[-1] and readline.get_line_buffer()[-1] != ' ':
if not delimiter and lastkeyw and \
readline.get_line_buffer()[-1] == '=' and len(words[-1]) > 1:
compl_help.help(completers_set[lastkeyw][1],ra)
if delimiter:
return ' '
return ['*']
else:
if lastkeyw:
return completers_set[lastkeyw][0](ra,delimiter)
def property_complete(idx,delimiter = False):
'''
This completer depends on the content of the line, i.e. on
previous tokens, in particular on the type of the RA.
'''
words = readline.get_line_buffer().split()
ra = RAInfo("pengine","metadata")
if '=' in words[-1] and readline.get_line_buffer()[-1] != ' ':
if not delimiter and \
readline.get_line_buffer()[-1] == '=' and len(words[-1]) > 1:
compl_help.help(prim_params_info,ra)
if delimiter:
return ' '
return ['*']
else:
return prim_complete_params(ra,delimiter)
def topics_dict(help_tab):
topics = {}
for topic in help_tab:
if topic != '.':
topics[topic] = None
return topics
def mk_completion_tab(cmd_class,ctab):
obj = cmd_class()
cmd_table = obj.cmd_table
for key,value in cmd_table.items():
if key.startswith("_"):
continue
if type(value) == type(object):
ctab[key] = {}
mk_completion_tab(value,ctab[key])
elif key == "help":
ctab[key] = topics_dict(obj.help_table)
else:
ctab[key] = None
try: ctab[key] = value[3]
except: pass
def lookup_dynamic(fun_list,idx,f_idx,words):
if not fun_list:
return []
if fun_list[f_idx] == loop:
f_idx -= 1
f = fun_list[f_idx]
w = words[0]
wordlist = f(idx)
delimiter = f(idx,1)
if len(wordlist) == 1 and wordlist[0] == '*':
return lookup_dynamic(fun_list,idx+1,f_idx+1,words[1:])
elif len(words) == 1:
return [x+delimiter for x in wordlist if x.startswith(w)]
return lookup_dynamic(fun_list,idx+1,f_idx+1,words[1:])
def lookup_words(ctab,words):
if not ctab:
return []
if type(ctab) == type(()):
return lookup_dynamic(ctab,0,0,words)
if len(words) == 1:
return [x+' ' for x in ctab if x.startswith(words[0])]
elif words[0] in ctab.keys():
return lookup_words(ctab[words[0]],words[1:])
return []
def split_buffer():
p = readline.get_line_buffer()
p = p.replace(':',' ').replace('=',' ')
return p.split()
def completer(txt,state):
words = split_buffer()
if readline.get_begidx() == readline.get_endidx():
words.append('')
matched = lookup_words(levels.completion_tab,words)
matched.append(None)
return matched[state]
termctrl = TerminalController()
wcache = WCache()
err_buf = ErrorBuffer()
user_prefs = UserPrefs()
id_store = IdMgmt()
cib_factory = CibFactory()
cli_display = CliDisplay()
tmpfiles = []
def load_rc(rcfile):
try: f = open(rcfile)
except: return
save_stdin = sys.stdin
sys.stdin = f
while True:
inp = multi_input()
if inp == None:
break
try: parse_line(levels,shlex.split(inp))
except ValueError, msg:
common_err(msg)
f.close()
sys.stdin = save_stdin
def multi_input(prompt = ''):
"""
Get input from user
Allow multiple lines using a continuation character
"""
global lineno
line = []
while True:
try:
text = raw_input(prompt)
except EOFError:
return None
if lineno >= 0:
lineno += 1
if regression_tests:
print ".INP:",text
sys.stdout.flush()
sys.stderr.flush()
stripped = text.strip()
if stripped.endswith('\\'):
stripped = stripped.rstrip('\\')
line.append(stripped)
if prompt:
prompt = '> '
else:
line.append(stripped)
break
return ''.join(line)
class Levels(object):
'''
Keep track of levels and prompts.
'''
def __init__(self,start_level):
self._marker = 0
self._in_transit = False
self.level_stack = []
self.comp_stack = []
self.current_level = start_level()
self.parse_root = self.current_level.cmd_table
self.prompts = []
self.completion_tab = {}
mk_completion_tab(start_level,self.completion_tab)
def getprompt(self):
return ' '.join(self.prompts)
def mark(self):
self._marker = len(self.level_stack)
self._in_transit = False
def release(self):
while len(self.level_stack) > self._marker:
self.droplevel()
def new_level(self,level_obj,token):
self.level_stack.append(self.current_level)
self.comp_stack.append(self.completion_tab)
self.prompts.append(token)
self.current_level = level_obj()
self.parse_root = self.current_level.cmd_table
self.completion_tab = self.completion_tab[token]
self._in_transit = True
def previous(self):
if self.level_stack:
return self.level_stack[-1]
def droplevel(self):
if self.level_stack:
try: self.current_level.end_game(self._in_transit)
except: pass
self.current_level = self.level_stack.pop()
self.completion_tab = self.comp_stack.pop()
self.parse_root = self.current_level.cmd_table
self.prompts.pop()
def check_args(args,argsdim):
if not argsdim: return True
if len(argsdim) == 1:
minargs = argsdim[0]
return len(args) >= minargs
else:
minargs,maxargs = argsdim
return len(args) >= minargs and len(args) <= maxargs
#
# Note on parsing
#
# Parsing tables are python dictionaries.
#
# Keywords are used as keys and the corresponding values are
# lists (actually tuples, since they should be read-only) or
# classes. In the former case, the keyword is a terminal and
# in the latter, a new object for the class is created. The class
# must have the cmd_table variable.
#
# The list has the following content:
#
# function: a function to handle this command
# numargs_list: number of minimum/maximum arguments; for example,
# (0,1) means one optional argument, (1,1) one required; if the
# list is empty then the function will parse arguments itself
# required minimum skill level: operator, administrator, expert
# (encoded as a small integer from 0 to 2)
# list of completer functions (optional)
#
def show_usage(cmd):
p = None
try: p = cmd.__doc__
except: pass
if p:
print >> sys.stderr, p
else:
syntax_err(cmd.__name__)
def parse_line(lvl,s):
if not s: return True
if s[0].startswith('#'): return True
lvl.mark()
pt = lvl.parse_root
cmd = None
i = 0
for i in range(len(s)):
token = s[i]
if token in pt:
if type(pt[token]) == type(object):
lvl.new_level(pt[token],token)
pt = lvl.parse_root # move to the next level
else:
cmd = pt[token] # terminal symbol
break # and stop parsing
else:
syntax_err(s[i:])
lvl.release()
return False
if cmd: # found a terminal symbol
if not user_prefs.check_skill_level(cmd[2]):
lvl.release()
skill_err(s[i])
return False
args = s[i+1:]
if not check_args(args,cmd[1]):
lvl.release()
show_usage(cmd[0])
return False
args = s[i:]
d = lambda: cmd[0](*args)
rv = d() # execute the command
lvl.release()
return rv != False
# three modes: interactive (no args supplied), batch (input from
# a file), half-interactive (args supplied, but not batch)
interactive = True
batch = False
inp_file = ''
prompt = ''
cib_in_use = os.getenv(CibShadow().envvar)
def cib_prompt():
return cib_in_use or "live"
def usage():
print >> sys.stderr, """
usage:
crm [-D display_type]
crm [-D display_type] args
crm [-D display_type] [-f file]
Use crm without arguments for an interactive session.
Supply one or more arguments for a "single-shot" use.
Specify with -f a file which contains a script. Use '-' for
standard input or use pipe/redirection.
crm displays cli format configurations using a color scheme.
It is disabled by "-D plain" and enabled by "-D color". The
default may be set in preferences (options).
Examples:
# crm -f stopapp2.cli
# crm < stopapp2.cli
# crm resource stop global_www
# crm status
"""
sys.exit(1)
def prereqs():
proglist = "cibadmin crm_resource crm_attribute crm_mon crm_standby crm_failcount"
for prog in proglist.split():
if not is_program(prog):
no_prog_err(prog)
sys.exit(1)
prereqs()
hist_file = os.environ.get('HOME')+"/.crm_history"
rc_file = os.environ.get('HOME')+"/.crm.rc"
readline.set_history_length(100)
readline.parse_and_bind("tab: complete")
readline.set_completer(completer)
readline.set_completer_delims(\
readline.get_completer_delims().replace('-','').replace('/','').replace('=',''))
try: readline.read_history_file(hist_file)
except: pass
build_completions = True
levels = Levels(TopLevel)
compl_help = CompletionHelp()
build_completions = False
this_node = os.uname()[1]
load_rc(rc_file)
if not sys.stdin.isatty():
lineno = 0
interactive = False
batch = True
import getopt
try:
opts, args = getopt.getopt(sys.argv[1:], \
'hf:RD:', ("help","file=","regression-tests","display="))
for o,p in opts:
if o in ("-h","--help"):
usage()
elif o == "-R":
regression_tests = True
elif o in ("-D","--display"):
if p not in CliOptions.output_types:
usage()
user_prefs.output = p
elif o in ("-f","--file"):
if args:
usage()
batch = True
interactive = False
lineno = 0
inp_file = p
except getopt.GetoptError,msg:
print msg
usage()
if len(args) == 1 and args[0].startswith("conf"):
parse_line(levels,["configure"])
elif len(args) > 0:
interactive = False
lineno = 0
if parse_line(levels,shlex.split(' '.join(args))):
sys.exit(0)
else:
sys.exit(1)
if inp_file == "-":
pass
elif inp_file:
try:
f = open(inp_file)
except IOError, msg:
common_err(msg)
usage()
sys.stdin = f
while True:
if interactive:
prompt = "crm(%s)%s# " % (cib_prompt(),levels.getprompt())
inp = multi_input(prompt)
if inp == None:
cmd_exit("eof")
try: parse_line(levels,shlex.split(inp))
except ValueError, msg:
common_err(msg)
# vim:ts=4:sw=4:et:

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