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#!/bin/bash
#
#
# OCF Resource Agent compliant drbd resource script.
#
# Copyright (c) 2004 - 2007 SUSE LINUX Products GmbH, Lars Marowsky-Bree
# All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#
# OCF instance parameters
# OCF_RESKEY_drbd_resource
# OCF_RESKEY_drbdconf
#######################################################################
# Initialization:
if [ -n "$OCF_DEBUG_LIBRARY" ]; then
. $OCF_DEBUG_LIBRARY
else
. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs
fi
#######################################################################
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="drbd">
<version>1.1</version>
<longdesc lang="en">
Master/Slave OCF Resource Agent for DRBD
</longdesc>
<shortdesc lang="en">This resource agent manages a Distributed
Replicated Block Device (DRBD) object as a master/slave
resource. DRBD is a mechanism for replicating storage; please see the
documentation for setup details.</shortdesc>
<parameters>
<parameter name="drbd_resource" unique="1" required="1">
<longdesc lang="en">
The name of the drbd resource from the drbd.conf file.
</longdesc>
<shortdesc lang="en">drbd resource name</shortdesc>
<content type="string" default="drbd0" />
</parameter>
<parameter name="drbdconf">
<longdesc lang="en">
Full path to the drbd.conf file.
</longdesc>
<shortdesc lang="en">Path to drbd.conf</shortdesc>
<content type="string" default="/etc/drbd.conf"/>
</parameter>
<parameter name="clone_overrides_hostname">
<longdesc lang="en">
Whether or not to override the hostname with the clone number. This can
be used to create floating peer configurations; drbd will be told to
use node_&#60;cloneno&#62; as the hostname instead of the real uname,
which can then be used in drbd.conf.
</longdesc>
<shortdesc lang="en">Override drbd hostname</shortdesc>
<content type="boolean" default="no"/>
</parameter>
</parameters>
<actions>
<action name="start" timeout="240" />
<action name="promote" timeout="90" />
<action name="demote" timeout="90" />
<action name="notify" timeout="90" />
<action name="stop" timeout="100" />
<action name="monitor" depth="0" timeout="20" interval="20" start-delay="0" role="Slave" />
<action name="monitor" depth="0" timeout="20" interval="10" start-delay="0" role="Master" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="30" />
</actions>
</resource-agent>
END
exit $OCF_SUCCESS
}
do_cmd() {
local cmd="$*"
ocf_log debug "$RESOURCE: Calling $cmd"
local cmd_out
cmd_out=$($cmd 2>&1)
ret=$?
if [ $ret -ne 0 ]; then
ocf_log err "$RESOURCE: Called $cmd"
ocf_log err "$RESOURCE: Exit code $ret"
ocf_log err "$RESOURCE: Command output: $cmd_out"
else
ocf_log debug "$RESOURCE: Exit code $ret"
ocf_log debug "$RESOURCE: Command output: $cmd_out"
fi
echo $cmd_out
return $ret
}
do_drbdadm() {
local cmd="$DRBDADM -c $DRBDCONF $*"
ocf_log debug "$RESOURCE: Calling $cmd"
local cmd_out
cmd_out=$($cmd 2>&1)
ret=$?
# Trim the garbage drbdadm likes to print when using the node
# override feature:
local cmd_ret=$(echo $cmd_out | sed -e 's/found __DRBD_NODE__.*<<//;')
if [ $ret -ne 0 ]; then
ocf_log err "$RESOURCE: Called $cmd"
ocf_log err "$RESOURCE: Exit code $ret"
ocf_log err "$RESOURCE: Command output: $cmd_ret"
else
ocf_log debug "$RESOURCE: Exit code $ret"
ocf_log debug "$RESOURCE: Command output: $cmd_ret"
fi
echo $cmd_ret
return $ret
}
drbd_init() {
check_binary $DRBDADM
CRM_MASTER="${HA_SBIN_DIR}/crm_master -l reboot "
RESOURCE="$OCF_RESKEY_drbd_resource"
CLONE_NO="$OCF_RESKEY_CRM_meta_clone"
DRBDCONF="${OCF_RESKEY_drbdconf:=/etc/drbd.conf}"
if [ ! -f "$DRBDCONF" ]; then
ocf_log err "drbd.conf not installed."
if [ "$ACTION" = 'monitor' ]; then
exit $OCF_NOT_RUNNING
else
exit $OCF_ERR_INSTALLED
fi
fi
case "$OCF_RESKEY_clone_overrides_hostname" in
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
__DRBD_NODE__="node_${CLONE_NO}"
export __DRBD_NODE__
ocf_log info "$RESOURCE: Using hostname $__DRBD_NODE__"
;;
esac
}
#######################################################################
drbd_usage() {
cat <<END
usage: $0 {start|stop|monitor|validate-all|promote|demote|notify|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}
is_drbd_enabled () {
if [ -f /proc/drbd ]; then
return 0
fi
return 1
}
get_drbd_ver() {
# returns 2 for unsupported (not 0.7.x or < 8.x)
# returns 1 for versions prior to 8.3.x
# returns 0 otherwise
drbdadm | grep Version | awk '{print $2}' |
awk -F. '
{
if( $1 == "0" ) # 0.7.x
{ v1 = $2; v2 = $3; }
else
{ v1 = $1; v2 = $2; }
}
v1 < 7 { exit 2; }
v1 == 7 || (v1 == 8 && v2 < 3) { exit 1; } # use state
# otherwise use role
'
}
get_status_cmd() {
get_drbd_ver
rc=$?
if [ $rc -ge 2 ]; then
ocf_log err "Cannot parse output of 'drbdadm | grep Version'"
exit $OCF_ERR_GENERIC
elif [ $rc -eq 1 ]; then
echo state
else
echo role
fi
}
drbd_get_status() {
cmd=`get_status_cmd`
DRBD_STATE=$(do_drbdadm "$cmd" $RESOURCE)
DRBD_STATE_LOCAL=$(echo $DRBD_STATE | sed -e 's#/.*##')
DRBD_STATE_REMOTE=$(echo $DRBD_STATE | sed -e 's#.*/##')
DRBD_CSTATE=$(do_drbdadm cstate $RESOURCE)
# Sanitize the various states, drbdadm is quite annoying; so if it
# outputs something which doesn't make sense, translate it into
# a harmless state:
case "$DRBD_STATE_LOCAL" in
"Not configured"|"Primary"|"Secondary") ;;
*) DRBD_STATE_LOCAL="Not configured" ;;
esac
case "$DRBD_STATE_REMOTE" in
"Primary"|"Secondary"|"Unknown") ;;
*) DRBD_STATE_REMOTE="Not configured" ;;
esac
case "$DRBD_CSTATE" in
Unconfigured|StandAlone|Unconnected|Timeout|BrokenPipe) ;;
NetworkFailure|WFConnection|WFReportParams|Connected|SkippedSyncS) ;;
SkippedSyncT|WFBitMapS|WFBitMapT|SyncSource|SyncTarget) ;;
PausedSyncS|PausedSyncT) ;;
*) DRBD_CSTATE="Unconfigured" ;;
esac
ocf_log debug "$RESOURCE status: $DRBD_STATE $DRBD_STATE_LOCAL $DRBD_STATE_REMOTE $DRBD_CSTATE"
}
drbd_start() {
if is_drbd_enabled; then
: OK
else
do_cmd modprobe -s drbd `$DRBDADM sh-mod-parms` || {
ocf_log err "Cannot load the drbd module."$'\n';
return $OCF_ERR_GENERIC
}
ocf_log debug "$RESOURCE start: Module loaded."
fi
drbd_get_status
if [ "$DRBD_STATE_LOCAL" != "Not configured" ]; then
ocf_log debug "$RESOURCE start: already configured."
return $OCF_SUCCESS
fi
if do_drbdadm up $RESOURCE ; then
drbd_get_status
if [ "$DRBD_STATE_LOCAL" != "Secondary" ]; then
ocf_log err "$RESOURCE start: not in Secondary mode after start."
return $OCF_ERR_GENERIC
fi
ocf_log debug "$RESOURCE start: succeeded."
return $OCF_SUCCESS
else
ocf_log err "$RESOURCE: Failed to start up."
return $OCF_ERR_GENERIC
fi
}
drbd_update_prefs() {
drbd_get_status
# TODO: This is probably way too complex.
case $DRBD_CSTATE in
Connected)
do_cmd $CRM_MASTER -v 75
;;
SyncSource|PausedSyncS|WFBitMapS|SkippedSyncS)
do_cmd $CRM_MASTER -v 100
;;
# TODO:
# (Inconsistent || Diskless && WFConnection) should be -infinity
# This one implies we'll try to promote even on disconnected
# nodes, but that might not work.
WFConnection)
do_cmd $CRM_MASTER -v 10
;;
*)
do_cmd $CRM_MASTER -v 5
;;
esac
return $OCF_SUCCESS
}
drbd_stop() {
# Do not bother if drbd is not enabled
if is_drbd_enabled; then
drbd_get_status
# Clear preference for becoming master
do_cmd $CRM_MASTER -D
if [ "$DRBD_STATE_LOCAL" = "Not configured" ]; then
ocf_log debug "$RESOURCE stop: already unconfigured."
return $OCF_SUCCESS
fi
# TODO: this is a _force_ operation. we may need to kill higher
# levels to be able to down drbd. figure out how...
if do_drbdadm down $RESOURCE ; then
ocf_log debug "$RESOURCE stop: drbdadm down succeeded."
# TODO: If drbdadm propagated error codes, this
# wouldn't be needed.
drbd_get_status
if [ "$DRBD_STATE_LOCAL" = "Not configured" ]; then
return $OCF_SUCCESS
else
ocf_log err "$RESOURCE stop: Not stopped."
fi
else
ocf_log err "$RESOURCE stop: Failed with exit code: $?"
fi
return $OCF_ERR_GENERIC
else
ocf_log debug "$RESOURCE stop: drbd not loaded."
fi
return $OCF_SUCCESS
}
drbd_monitor() {
# TODO: Think about how to monitor drbd and what constitutes
# failure cases...
# diskless etc?
# A secondary node which is supposed to be primary?
# TODO: we ought to update the preferences here occasionally,
# but that causes transitions right now ...
if is_drbd_enabled; then
: OK
else
ocf_log warn "$RESOURCE monitor: drbd module not loaded"
return $OCF_NOT_RUNNING
fi
drbd_get_status
if [ "$DRBD_STATE_LOCAL" = "Not configured" ]; then
ocf_log debug "$RESOURCE monitor: resource not configured"
return $OCF_NOT_RUNNING
elif [ "$DRBD_STATE_LOCAL" = "Primary" ]; then
if [ "$OCF_RESKEY_CRM_meta_interval" -eq 0 ]; then
# Restore the master setting during probes
ocf_log debug "$RESOURCE monitor: restoring master setting during probe"
drbd_update_prefs
fi
return $OCF_RUNNING_MASTER
elif [ "$DRBD_STATE_LOCAL" = "Secondary" ]; then
# drbd_update_prefs
return $OCF_SUCCESS
else
ocf_log err "$RESOURCE monitor: unexpected local state: $DRBD_STATE_LOCAL"
fi
return $OCF_ERR_GENERIC
}
drbd_promote() {
if is_drbd_enabled; then
: OK
else
ocf_log err "drbd is not enabled"
return $OCF_ERR_GENERIC
fi
drbd_get_status
if [ "$DRBD_STATE_LOCAL" = "Primary" ]; then
ocf_log info "$RESOURCE promote: already primary"
return $OCF_SUCCESS
fi
if [ "$DRBD_STATE_LOCAL" != "Secondary" ]; then
ocf_log warn "$RESOURCE promote: Not secondary to start with."
return $OCF_ERR_GENERIC
fi
if do_drbdadm primary $RESOURCE ; then
# TODO: WORK AROUND because drbdadm has a bug and
# reports success even if it failed :-(
drbd_get_status
if [ "$DRBD_STATE_LOCAL" = "Primary" ]; then
ocf_log info "$RESOURCE promote: primary succeeded"
return $OCF_SUCCESS
else
ocf_log err "$RESOURCE promote: Not primary despite drbdadm call."
fi
else
ocf_log err "$RESOURCE promote: Failed with exit code $?."
fi
return $OCF_ERR_GENERIC
}
drbd_demote() {
if is_drbd_enabled; then
: OK
else
# A stopped resource also is demoted.
ocf_log debug "$RESOURCE demote: module not loaded"
return $OCF_SUCCESS
fi
if [ "$DRBD_STATE_LOCAL" = "Secondary" ]; then
ocf_log debug "$RESOURCE demote: already secondary"
return $OCF_SUCCESS
fi
if [ "$DRBD_STATE_LOCAL" = "Not configured" ]; then
ocf_log debug "$RESOURCE demote: already stopped"
return $OCF_NOT_RUNNING
fi
# TODO: this is a _force_ operation. we may need to kill higher
# levels (or switch them to r/o) to be able to demote drbd.
# figure out how...
if do_drbdadm secondary $RESOURCE ; then
if [ "$DRBD_STATE_LOCAL" = "Primary" ]; then
ocf_log err "$RESOURCE demote: still primary!"
return $OCF_ERR_GENERIC
fi
ocf_log debug "$RESOURCE demote: succeeded"
return $OCF_SUCCESS
else
ocf_log err "$RESOURCE demote: Failed with exit code $?."
return $OCF_ERR_GENERIC
fi
}
drbd_notify() {
local n_type="$OCF_RESKEY_CRM_meta_notify_type"
local n_op="$OCF_RESKEY_CRM_meta_notify_operation"
set -- $OCF_RESKEY_CRM_meta_notify_active_resource
local n_active="$#"
set -- $OCF_RESKEY_CRM_meta_notify_stop_resource
local n_stop="$#"
set -- $OCF_RESKEY_CRM_meta_notify_start_resource
local n_start="$#"
ocf_log debug "$RESOURCE notify: $n_type for $n_op - counts: active $n_active - starting $n_start - stopping $n_stop"
case $n_type in
pre)
case $n_op in
promote) # TODO:
# Resist promotion of the other side in case we
# are already primary - though the CRM should
# not even attempt that.
;;
esac
;;
post) # TODO: Entire case statement which follows redundant?
case $n_op in
start)
if [ "$n_active" -eq 2 ]; then
# The other side is running, so we ought
# to connect and wait for that.
do_drbdadm connect $RESOURCE
do_drbdadm wait_connect $RESOURCE
# TODO: If this can cause a hang if the
# other side isn't connected or goes
# away during that, maybe just sleep
# here for 5-10s or take out the entire
# case statement
fi
;;
stop)
# TODO BUG: disconnect seems to force
# non-primary mode?!?
#### do_drbdadm disconnect $RESOURCE
# TODO: If we are secondary, do we need to do
# anything about a stopped primary in case we
# had an outdated flag...?
;;
esac
# After something has been done is a good time to
# recheck our status:
drbd_update_prefs
;;
esac
return $OCF_SUCCESS
}
drbd_validate_all () {
# First check the configuration file
if [ -n "$DRBDCONF" ] && [ ! -f "$DRBDCONF" ]; then
ocf_log err "Configuration file does not exist: $DRBDCONF"
return $OCF_ERR_CONFIGURED
fi
# Check the resource name, it should appear in DRBDCONF
if [ -z "$RESOURCE" ]; then
ocf_log err "No resource name specified!"
return $OCF_ERR_ARGS
fi
if do_drbdadm dump $RESOURCE 2>/dev/null ; then
:
else
ocf_log err "Invalid configuration file $DRBDCONF"
return $OCF_ERR_CONFIGURED
fi
if [ "$OCF_RESKEY_CRM_meta_clone_max" -ne 2 ] \
|| [ "$OCF_RESKEY_CRM_meta_clone_node_max" -ne 1 ] \
|| [ "$OCF_RESKEY_CRM_meta_master_node_max" -ne 1 ] \
|| [ "$OCF_RESKEY_CRM_meta_master_max" -ne 1 ] ; then
ocf_log err "Clone options misconfigured."
exit $OCF_ERR_CONFIGURED
fi
return $OCF_SUCCESS
}
if [ $# -ne 1 ]; then
echo "Incorrect parameter count."
drbd_usage
exit $OCF_ERR_ARGS
fi
: ${OCF_RESKEY_CRM_meta_interval=0}
ACTION=$1
case $ACTION in
meta-data) meta_data
;;
validate-all) drbd_init
drbd_validate_all
;;
start|stop|monitor|promote|demote|notify)
if ocf_is_root ; then : ; else
ocf_log err "You must be root to perform this operation."
exit $OCF_ERR_PERM
fi
drbd_init
drbd_$ACTION
exit $?
;;
usage|help) drbd_usage
exit $OCF_SUCCESS
;;
*) drbd_usage
exit $OCF_ERR_ARGS
;;
esac

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Sat, Jan 25, 6:47 AM (1 d, 10 h)
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drbd (14 KB)

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