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|
#!/bin/sh
#
#
# Example of a stateful OCF Resource Agent.
#
# Copyright (c) 2006 Andrew Beekhof
#
# 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.
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
# Parameter defaults
OCF_RESKEY_state_default="${HA_RSCTMP}/Stateful-${OCF_RESOURCE_INSTANCE}.state"
: ${OCF_RESKEY_state=${OCF_RESKEY_state_default}}
#######################################################################
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="Stateful" version="1.0">
<version>1.0</version>
<longdesc lang="en">
This is an example resource agent that implements two states
</longdesc>
<shortdesc lang="en">Example stateful resource agent</shortdesc>
<parameters>
<parameter name="state" unique="1">
<longdesc lang="en">
Location to store the resource state in
</longdesc>
<shortdesc lang="en">State file</shortdesc>
<content type="string" default="${OCF_RESKEY_state_default}" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="20s" />
<action name="stop" timeout="20s" />
<action name="promote" timeout="20s" />
<action name="demote" timeout="20s" />
<action name="monitor" depth="0" timeout="20s" interval="10s"/>
<action name="meta-data" timeout="5s" />
<action name="validate-all" timeout="20s" />
</actions>
</resource-agent>
END
exit $OCF_SUCCESS
}
#######################################################################
stateful_usage() {
cat <<END
usage: $0 {start|stop|promote|demote|monitor|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
exit $1
}
stateful_update() {
echo $1 > ${OCF_RESKEY_state}
}
stateful_check_state() {
target=$1
if [ -f ${OCF_RESKEY_state} ]; then
state=`cat ${OCF_RESKEY_state}`
if [ "x$target" = "x$state" ]; then
return $OCF_SUCCESS
fi
else
if [ "x$target" = "x" ]; then
return $OCF_SUCCESS
fi
fi
return $OCF_ERR_GENERIC
}
stateful_start() {
stateful_check_state master
if [ $? = 0 ]; then
# CRM Error - Should never happen
return $OCF_RUNNING_MASTER
fi
stateful_update slave
ocf_promotion_score -v 5
return $OCF_SUCCESS
}
stateful_demote() {
stateful_check_state
if [ $? = 0 ]; then
# CRM Error - Should never happen
return $OCF_NOT_RUNNING
fi
stateful_update slave
ocf_promotion_score -v 5
return $OCF_SUCCESS
}
stateful_promote() {
stateful_check_state
if [ $? = 0 ]; then
return $OCF_NOT_RUNNING
fi
stateful_update master
ocf_promotion_score -v 10
return $OCF_SUCCESS
}
stateful_stop() {
ocf_promotion_score -D
stateful_check_state master
if [ $? = 0 ]; then
# CRM Error - Should never happen
return $OCF_RUNNING_MASTER
fi
if [ -f ${OCF_RESKEY_state} ]; then
rm ${OCF_RESKEY_state}
fi
return $OCF_SUCCESS
}
stateful_monitor() {
stateful_check_state "master"
if [ $? = 0 ]; then
return $OCF_RUNNING_MASTER
fi
stateful_check_state "slave"
if [ $? = 0 ]; then
return $OCF_SUCCESS
fi
if [ -f ${OCF_RESKEY_state} ]; then
echo "File '${OCF_RESKEY_state}' exists but contains unexpected contents"
cat ${OCF_RESKEY_state}
return $OCF_ERR_GENERIC
fi
return $OCF_NOT_RUNNING
}
stateful_validate() {
exit $OCF_SUCCESS
}
case $__OCF_ACTION in
meta-data) meta_data;;
start) stateful_start;;
promote) stateful_promote;;
demote) stateful_demote;;
stop) stateful_stop;;
monitor) stateful_monitor;;
validate-all) stateful_validate;;
usage|help) stateful_usage $OCF_SUCCESS;;
*) stateful_usage $OCF_ERR_UNIMPLEMENTED;;
esac
exit $?
|
