Page MenuHomeClusterLabs Projects
Files F2825317

EvmsSCC
No OneTemporary
Actions

EvmsSCC
View Options

#!/bin/sh
#
# Support: linux-ha@lists.linux-ha.org
# License: GNU General Public License (GPL)
#
# EvmsSCC
# Description: Runs evms_activate in a heartbeat cluster to activate a
# EVMS shared cluster container in the cluster.
# Original Author: Jo De Baer (jdebaer@novell.com)
# Original Release: 06 Nov 2006
#
# usage: ./EvmsSCC {start|stop|status|monitor|meta-data}
#
# The goal of this resource agent is to provoke the creation of device file
# in /dev/emvs which correspond to EVMS2 volumes that reside in a EVMS2 shared
# cluster container. As such it should be run as a clone resource in the
# cluster. Logic inside the resource agent will make sure that "evms_activate"
# is run on only one node in the cluster, both at cluster startup time as well
# as when a node joins the cluster.
#
# Typically, resources that need to mount EVMS2 volumes should run after this
# resource agent has finished it's run. As such those resources should be made
# "dependent" on this resource agent by the cluster administrator. An example
# of resources that should depend on this resource agent are Filesystem resource
# agent that mount OCFS2 volumes that reside on EVMS2 volumes in a shared
# EVMS2 cluster container.
#
# For this resource agent to do it's job correctly, evmsd must be running on
# the node where the agent is started. Usually evmsd is started by the cluster
# software via a respawn statement in /etc/ha.d/ha.cf. If you encounter timing
# issues where evmsd is not yet started but where the cluster already starts
# the EvmsSCC clone, then you should comment out the evmsd respawn statement
# in /etc/ha.d/ha.cf and start evmsd on each node in the cluster via a separate
# clone resource agent. The EvmsSCC resource agent cloneset should then be made
# dependent to this evmsd cloneset. This will guarantee that emvsd is running
# before EvmsSCC is started, on each node in the cluster.
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
# Utilities used by this script
CUT=cut
EVMSACTIVATE=evms_activate
usage() {
cat <<-EOT
usage: $0 {start|stop|status|monitor|meta-data}
EOT
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="EvmsSCC">
<version>1.0</version>
<longdesc lang="en">
Deprecation warning: EVMS is no longer actively maintained and should not be used. This agent is deprecated and may be removed from a future release. --
Resource script for EVMS shared cluster container. It runs evms_activate on one node in the cluster.
</longdesc>
<shortdesc lang="en">Manages EVMS Shared Cluster Containers (SCCs) (deprecated)</shortdesc>
<parameters>
<parameter name="ignore_deprecation">
<longdesc lang="en">
If set to true, suppresses the deprecation warning for this agent.
</longdesc>
<shortdesc lang="en">Suppress deprecation warning</shortdesc>
<content type="boolean" default="false" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="60" />
<action name="stop" timeout="60" />
<action name="notify" timeout="60" />
<action name="status" depth="0" timeout="10" interval="10" />
<action name="monitor" depth="0" timeout="10" interval="10" />
<action name="meta-data" timeout="5" />
</actions>
</resource-agent>
END
}
EvmsSCC_status()
{
# At the moment we don't support monitoring EVMS activations. We just return "not running" to cope with the pre-start monitor call.
return $OCF_NOT_RUNNING
}
EvmsSCC_notify()
{
local n_type="$OCF_RESKEY_CRM_meta_notify_type"
local n_op="$OCF_RESKEY_CRM_meta_notify_operation"
local n_active="$OCF_RESKEY_CRM_meta_notify_active_uname"
local n_stop="$OCF_RESKEY_CRM_meta_notify_stop_uname"
local n_start="$OCF_RESKEY_CRM_meta_notify_start_uname"
case "$n_type" in
pre)
case "$n_op" in
start) ocf_log debug "EvmsSCC: Notify: Starting node(s): $n_start."
EvmsSCC_start_notify_common
;;
esac
;;
esac
return $OCF_SUCCESS
}
EvmsSCC_start()
{
local n_type="$OCF_RESKEY_CRM_meta_notify_type"
local n_op="$OCF_RESKEY_CRM_meta_notify_operation"
local n_active="$OCF_RESKEY_CRM_meta_notify_active_uname"
local n_stop="$OCF_RESKEY_CRM_meta_notify_stop_uname"
local n_start="$OCF_RESKEY_CRM_meta_notify_start_uname"
ocf_log debug "EvmsSCC: Start: starting node(s): $n_start."
EvmsSCC_start_notify_common
return $OCF_SUCCESS
}
EvmsSCC_stop()
{
return $OCF_SUCCESS
}
EvmsSCC_start_notify_common()
{
local n_myself=${HA_CURHOST:-$(uname -n | tr A-Z a-z)}
ocf_log debug "EvmsSCC: Start_Notify: I am node $n_myself."
n_active="$n_active $n_start"
case " $n_active " in
*" $n_myself "*) ;;
*) ocf_log err "EvmsSCC: $n_myself (local) not on active list!"
return $OCF_ERR_GENERIC
;;
esac
#pick the first node from the starting list
#when the cluster boots this will be one of the many booting nodes
#when a node later joins the cluster, this will be the joining node
local n_first=$(echo $n_start | cut -d ' ' -f 1)
ocf_log debug "EvmsSCC: Start_Notify: First node in starting list is $n_first."
if [ "$n_myself" = "$n_first" ] ; then
ocf_log debug "EvmsSCC: Start_Notify: I am running ${EVMSACTIVATE}."
while true ; do
if ! ${EVMSACTIVATE} -q 2> /dev/null ; then
SLEEP_TIME=$(($(ocf_maybe_random) % 40))
ocf_log info "EvmsSCC: Evms call failed - sleeping for $SLEEP_TIME seconds and then trying again."
sleep $SLEEP_TIME
else
break
fi
done
fi
return $OCF_SUCCESS
}
# Check the arguments passed to this script
if
[ $# -ne 1 ]
then
usage
exit $OCF_ERR_ARGS
fi
OP=$1
case $OP in
meta-data) meta_data
exit $OCF_SUCCESS
;;
usage) usage
exit $OCF_SUCCESS
;;
esac
# Be obnoxious, log deprecation warning on every invocation (unless
# suppressed by resource configuration).
ocf_deprecated
check_binary $CUT
check_binary $EVMSACTIVATE
case $OP in
start) EvmsSCC_start
;;
notify) EvmsSCC_notify
;;
stop) EvmsSCC_stop
;;
status|monitor) EvmsSCC_status
;;
*) usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
exit $?

File Metadata

Mime Type
text/x-shellscript
Expires
Sat, Jan 25, 12:09 PM (19 h, 55 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
1316275
Default Alt Text
EvmsSCC (6 KB)

Event Timeline