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CIB.py
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""" CIB generator for Pacemaker's Cluster Test Suite (CTS)
"""
# Pacemaker targets compatibility with Python 2.7 and 3.2+
from __future__ import print_function, unicode_literals, absolute_import, division
__copyright__ = "Copyright 2008-2019 the Pacemaker project contributors"
__license__ = "GNU General Public License version 2 or later (GPLv2+) WITHOUT ANY WARRANTY"
import os
import warnings
import tempfile
from cts.CTSvars import *
class CibBase(object):
def __init__(self, Factory, tag, _id, **kwargs):
self.tag = tag
self.name = _id
self.kwargs = kwargs
self.children = []
self.Factory = Factory
def __repr__(self):
return "%s-%s" % (self.tag, self.name)
def add_child(self, child):
self.children.append(child)
def __setitem__(self, key, value):
if value:
self.kwargs[key] = value
else:
self.kwargs.pop(key, None)
from cts.cib_xml import *
class ConfigBase(object):
cts_cib = None
version = "unknown"
Factory = None
def __init__(self, CM, factory, tmpfile=None):
self.CM = CM
self.Factory = factory
if not tmpfile:
warnings.filterwarnings("ignore")
f=tempfile.NamedTemporaryFile(delete=True)
f.close()
tmpfile = f.name
warnings.resetwarnings()
self.Factory.tmpfile = tmpfile
def version(self):
return self.version
def NextIP(self):
ip = self.CM.Env["IPBase"]
if ":" in ip:
(prefix, sep, suffix) = ip.rpartition(":")
suffix = str(hex(int(suffix, 16)+1)).lstrip("0x")
else:
(prefix, sep, suffix) = ip.rpartition(".")
suffix = str(int(suffix)+1)
ip = prefix + sep + suffix
self.CM.Env["IPBase"] = ip
return ip.strip()
class CIB12(ConfigBase):
version = "pacemaker-1.2"
counter = 1
def _show(self, command=""):
output = ""
(rc, result) = self.Factory.rsh(self.Factory.target, "HOME=/root CIB_file="+self.Factory.tmpfile+" cibadmin -Ql "+command, None, )
for line in result:
output += line
self.Factory.debug("Generated Config: "+line)
return output
def NewIP(self, name=None, standard="ocf"):
if self.CM.Env["IPagent"] == "IPaddr2":
ip = self.NextIP()
if not name:
if ":" in ip:
(prefix, sep, suffix) = ip.rpartition(":")
name = "r"+suffix
else:
name = "r"+ip
r = Resource(self.Factory, name, self.CM.Env["IPagent"], standard)
r["ip"] = ip
if ":" in ip:
r["cidr_netmask"] = "64"
r["nic"] = "eth0"
else:
r["cidr_netmask"] = "32"
else:
if not name:
name = "r%s%d" % (self.CM.Env["IPagent"], self.counter)
self.counter = self.counter + 1
r = Resource(self.Factory, name, self.CM.Env["IPagent"], standard)
r.add_op("monitor", "5s")
return r
def get_node_id(self, node_name):
""" Check the cluster configuration for a node ID. """
# We can't account for every possible configuration,
# so we only return a node ID if:
# * The node is specified in /etc/corosync/corosync.conf
# with "ring0_addr:" equal to node_name and "nodeid:"
# explicitly specified.
# In all other cases, we return 0.
node_id = 0
# awkward command: use } as record separator
# so each corosync.conf "object" is one record;
# match the "node {" record that has "ring0_addr: node_name";
# then print the substring of that record after "nodeid:"
(rc, output) = self.Factory.rsh(self.Factory.target,
r"""awk -v RS="}" """
r"""'/^(\s*nodelist\s*{)?\s*node\s*{.*(ring0_addr|name):\s*%s(\s+|$)/"""
r"""{gsub(/.*nodeid:\s*/,"");gsub(/\s+.*$/,"");print}'"""
r""" /etc/corosync/corosync.conf""" % node_name, None)
if rc == 0 and len(output) == 1:
try:
node_id = int(output[0])
except ValueError:
node_id = 0
return node_id
def install(self, target):
old = self.Factory.tmpfile
# Force a rebuild
self.cts_cib = None
self.Factory.tmpfile = CTSvars.CRM_CONFIG_DIR+"/cib.xml"
self.contents(target)
self.Factory.rsh(self.Factory.target, "chown "+CTSvars.CRM_DAEMON_USER+" "+self.Factory.tmpfile)
self.Factory.tmpfile = old
def contents(self, target=None):
# fencing resource
if self.cts_cib:
return self.cts_cib
if target:
self.Factory.target = target
self.Factory.rsh(self.Factory.target, "HOME=/root cibadmin --empty %s > %s" % (self.version, self.Factory.tmpfile))
self.num_nodes = len(self.CM.Env["nodes"])
no_quorum = "stop"
if self.num_nodes < 3:
no_quorum = "ignore"
self.Factory.log("Cluster only has %d nodes, configuring: no-quorum-policy=ignore" % self.num_nodes)
# We don't need a nodes section unless we add attributes
stn = None
# Fencing resource
# Define first so that the shell doesn't reject every update
if self.CM.Env["DoFencing"]:
# Define the "real" fencing device
st = Resource(self.Factory, "Fencing", ""+self.CM.Env["stonith-type"], "stonith")
# Set a threshold for unreliable stonith devices such as the vmware one
st.add_meta("migration-threshold", "5")
st.add_op("monitor", "120s", timeout="120s")
st.add_op("stop", "0", timeout="60s")
st.add_op("start", "0", timeout="60s")
# For remote node tests, a cluster node is stopped and brought back up
# as a remote node with the name "remote-OLDNAME". To allow fencing
# devices to fence these nodes, create a list of all possible node names.
all_node_names = [ prefix+n for n in self.CM.Env["nodes"] for prefix in ('', 'remote-') ]
# Add all parameters specified by user
entries = self.CM.Env["stonith-params"].split(',')
for entry in entries:
try:
(name, value) = entry.split('=', 1)
except ValueError:
print("Warning: skipping invalid fencing parameter: %s" % entry)
continue
# Allow user to specify "all" as the node list, and expand it here
if name in [ "hostlist", "pcmk_host_list" ] and value == "all":
value = ' '.join(all_node_names)
st[name] = value
st.commit()
# Test advanced fencing logic
if True:
stf_nodes = []
stt_nodes = []
attr_nodes = {}
# Create the levels
stl = FencingTopology(self.Factory)
for node in self.CM.Env["nodes"]:
# Remote node tests will rename the node
remote_node = "remote-" + node
# Randomly assign node to a fencing method
ftype = self.CM.Env.RandomGen.choice(["levels-and", "levels-or ", "broadcast "])
# For levels-and, randomly choose targeting by node name or attribute
by = ""
if ftype == "levels-and":
node_id = self.get_node_id(node)
if node_id == 0 or self.CM.Env.RandomGen.choice([True, False]):
by = " (by name)"
else:
attr_nodes[node] = node_id
by = " (by attribute)"
self.CM.log(" - Using %s fencing for node: %s%s" % (ftype, node, by))
if ftype == "levels-and":
# If targeting by name, add a topology level for this node
if node not in attr_nodes:
stl.level(1, node, "FencingPass,Fencing")
# Always target remote nodes by name, otherwise we would need to add
# an attribute to the remote node only during remote tests (we don't
# want nonexistent remote nodes showing up in the non-remote tests).
# That complexity is not worth the effort.
stl.level(1, remote_node, "FencingPass,Fencing")
# Add the node (and its remote equivalent) to the list of levels-and nodes.
stt_nodes.extend([node, remote_node])
elif ftype == "levels-or ":
for n in [ node, remote_node ]:
stl.level(1, n, "FencingFail")
stl.level(2, n, "Fencing")
stf_nodes.extend([node, remote_node])
# If any levels-and nodes were targeted by attribute,
# create the attributes and a level for the attribute.
if attr_nodes:
stn = Nodes(self.Factory)
for (node_name, node_id) in list(attr_nodes.items()):
stn.add_node(node_name, node_id, { "cts-fencing" : "levels-and" })
stl.level(1, None, "FencingPass,Fencing", "cts-fencing", "levels-and")
# Create a Dummy agent that always passes for levels-and
if len(stt_nodes):
stt = Resource(self.Factory, "FencingPass", "fence_dummy", "stonith")
stt["pcmk_host_list"] = " ".join(stt_nodes)
# Wait this many seconds before doing anything, handy for letting disks get flushed too
stt["random_sleep_range"] = "30"
stt["mode"] = "pass"
stt.commit()
# Create a Dummy agent that always fails for levels-or
if len(stf_nodes):
stf = Resource(self.Factory, "FencingFail", "fence_dummy", "stonith")
stf["pcmk_host_list"] = " ".join(stf_nodes)
# Wait this many seconds before doing anything, handy for letting disks get flushed too
stf["random_sleep_range"] = "30"
stf["mode"] = "fail"
stf.commit()
# Now commit the levels themselves
stl.commit()
o = Option(self.Factory)
o["stonith-enabled"] = self.CM.Env["DoFencing"]
o["start-failure-is-fatal"] = "false"
o["pe-input-series-max"] = "5000"
o["shutdown-escalation"] = "5min"
o["batch-limit"] = "10"
o["dc-deadtime"] = "5s"
o["no-quorum-policy"] = no_quorum
if self.CM.Env["DoBSC"] == 1:
o["ident-string"] = "Linux-HA TEST configuration file - REMOVEME!!"
o.commit()
o = OpDefaults(self.Factory)
o["timeout"] = "90s"
o.commit()
# Commit the nodes section if we defined one
if stn is not None:
stn.commit()
# Add an alerts section if possible
if self.Factory.rsh.exists_on_all(self.CM.Env["notification-agent"], self.CM.Env["nodes"]):
alerts = Alerts(self.Factory)
alerts.add_alert(self.CM.Env["notification-agent"],
self.CM.Env["notification-recipient"])
alerts.commit()
# Add resources?
if self.CM.Env["CIBResource"] == 1:
self.add_resources()
if self.CM.cluster_monitor == 1:
mon = Resource(self.Factory, "cluster_mon", "ocf", "ClusterMon", "pacemaker")
mon.add_op("start", "0", requires="nothing")
mon.add_op("monitor", "5s", requires="nothing")
mon["update"] = "10"
mon["extra_options"] = "-r -n"
mon["user"] = "abeekhof"
mon["htmlfile"] = "/suse/abeekhof/Export/cluster.html"
mon.commit()
#self._create('''location prefer-dc cluster_mon rule -INFINITY: \#is_dc eq false''')
# generate cib
self.cts_cib = self._show()
if self.Factory.tmpfile != CTSvars.CRM_CONFIG_DIR+"/cib.xml":
self.Factory.rsh(self.Factory.target, "rm -f "+self.Factory.tmpfile)
return self.cts_cib
def add_resources(self):
# Per-node resources
for node in self.CM.Env["nodes"]:
name = "rsc_"+node
r = self.NewIP(name)
r.prefer(node, "100")
r.commit()
# Migrator
# Make this slightly sticky (since we have no other location constraints) to avoid relocation during Reattach
m = Resource(self.Factory, "migrator","Dummy", "ocf", "pacemaker")
m["passwd"] = "whatever"
m.add_meta("resource-stickiness","1")
m.add_meta("allow-migrate", "1")
m.add_op("monitor", "P10S")
m.commit()
# Ping the test master
p = Resource(self.Factory, "ping-1","ping", "ocf", "pacemaker")
p.add_op("monitor", "60s")
p["host_list"] = self.CM.Env["cts-master"]
p["name"] = "connected"
p["debug"] = "true"
c = Clone(self.Factory, "Connectivity", p)
c["globally-unique"] = "false"
c.commit()
# promotable clone resource
s = Resource(self.Factory, "stateful-1", "Stateful", "ocf", "pacemaker")
s.add_op("monitor", "15s", timeout="60s")
s.add_op("monitor", "16s", timeout="60s", role="Master")
ms = Clone(self.Factory, "promotable-1", s)
ms["promotable"] = "true"
ms["clone-max"] = self.num_nodes
ms["clone-node-max"] = 1
ms["promoted-max"] = 1
ms["promoted-node-max"] = 1
# Require connectivity to run the promotable clone
r = Rule(self.Factory, "connected", "-INFINITY", op="or")
r.add_child(Expression(self.Factory, "m1-connected-1", "connected", "lt", "1"))
r.add_child(Expression(self.Factory, "m1-connected-2", "connected", "not_defined", None))
ms.prefer("connected", rule=r)
ms.commit()
# Group Resource
g = Group(self.Factory, "group-1")
g.add_child(self.NewIP())
if self.CM.Env["have_systemd"]:
sysd = Resource(self.Factory, "petulant",
"pacemaker-cts-dummyd@10", "service")
sysd.add_op("monitor", "P10S")
g.add_child(sysd)
else:
g.add_child(self.NewIP())
g.add_child(self.NewIP())
# Make group depend on the promotable clone
g.after("promotable-1", first="promote", then="start")
g.colocate("promotable-1", "INFINITY", withrole="Master")
g.commit()
# LSB resource
lsb = Resource(self.Factory, "lsb-dummy", "LSBDummy", "lsb")
lsb.add_op("monitor", "5s")
# LSB with group
lsb.after("group-1")
lsb.colocate("group-1")
lsb.commit()
class CIB20(CIB12):
version = "pacemaker-2.5"
class CIB30(CIB12):
version = "pacemaker-3.0"
#class HASI(CIB10):
# def add_resources(self):
# # DLM resource
# self._create('''primitive dlm ocf:pacemaker:controld op monitor interval=120s''')
# self._create('''clone dlm-clone dlm meta globally-unique=false interleave=true''')
# O2CB resource
# self._create('''primitive o2cb ocf:ocfs2:o2cb op monitor interval=120s''')
# self._create('''clone o2cb-clone o2cb meta globally-unique=false interleave=true''')
# self._create('''colocation o2cb-with-dlm INFINITY: o2cb-clone dlm-clone''')
# self._create('''order start-o2cb-after-dlm mandatory: dlm-clone o2cb-clone''')
class ConfigFactory(object):
def __init__(self, CM):
self.CM = CM
self.rsh = self.CM.rsh
self.register("pacemaker12", CIB12, CM, self)
self.register("pacemaker20", CIB20, CM, self)
self.register("pacemaker30", CIB30, CM, self)
# self.register("hae", HASI, CM, self)
if self.CM.Env["ListTests"] == 0:
self.target = self.CM.Env["nodes"][0]
self.tmpfile = None
def log(self, args):
self.CM.log("cib: %s" % args)
def debug(self, args):
self.CM.debug("cib: %s" % args)
def register(self, methodName, constructor, *args, **kargs):
"""register a constructor"""
_args = [constructor]
_args.extend(args)
setattr(self, methodName, ConfigFactoryItem(*_args, **kargs))
def unregister(self, methodName):
"""unregister a constructor"""
delattr(self, methodName)
def createConfig(self, name="pacemaker-1.0"):
if name == "pacemaker-1.0":
name = "pacemaker10";
elif name == "pacemaker-1.2":
name = "pacemaker12";
elif name == "pacemaker-2.0":
name = "pacemaker20";
elif name == "pacemaker-3.0":
name = "pacemaker30";
elif name == "hasi":
name = "hae";
if hasattr(self, name):
return getattr(self, name)()
else:
self.CM.log("Configuration variant '%s' is unknown. Defaulting to latest config" % name)
return self.pacemaker30()
class ConfigFactoryItem(object):
def __init__(self, function, *args, **kargs):
self._function = function
self._args = args
self._kargs = kargs
def __call__(self, *args, **kargs):
"""call function"""
_args = list(self._args)
_args.extend(args)
_kargs = self._kargs.copy()
_kargs.update(kargs)
return self._function(*_args,**_kargs)
if __name__ == '__main__':
""" Unit test (pass cluster node names as command line arguments) """
import cts.CTS
import cts.CM_corosync
import sys
if len(sys.argv) < 2:
print("Usage: %s <node> ..." % sys.argv[0])
sys.exit(1)
args = [
"--nodes", " ".join(sys.argv[1:]),
"--clobber-cib",
"--populate-resources",
"--stack", "corosync",
"--test-ip-base", "fe80::1234:56:7890:1000",
"--stonith", "rhcs",
]
env = CTS.CtsLab(args)
cm = CM_corosync.crm_corosync(env)
CibFactory = ConfigFactory(cm)
cib = CibFactory.createConfig("pacemaker-2.0")
print(cib.contents())

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