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clvm
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#!/bin/bash
#
# Copyright (c) 2014 David Vossel <dvossel@redhat.com>
# 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.
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
. ${OCF_FUNCTIONS_DIR}/ocf-directories
#######################################################################
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="clvm" version="0.9">
<version>1.0</version>
<longdesc lang="en">
This agent manages the clvmd daemon.
</longdesc>
<shortdesc lang="en">clvmd</shortdesc>
<parameters>
<parameter name="with_cmirrord" unique="0" required="0">
<longdesc lang="en">
Start with cmirrord (cluster mirror log daemon).
</longdesc>
<shortdesc lang="en">activate cmirrord</shortdesc>
<content type="boolean" default="false" />
</parameter>
<parameter name="daemon_options" unique="0">
<longdesc lang="en">
Options to clvmd. Refer to clvmd.8 for detailed descriptions.
</longdesc>
<shortdesc lang="en">Daemon Options</shortdesc>
<content type="string" default="-d0"/>
</parameter>
</parameters>
<actions>
<action name="start" timeout="90" />
<action name="stop" timeout="90" />
<action name="monitor" timeout="90" interval="30" depth="0" />
<action name="reload" timeout="90" />
<action name="meta-data" timeout="10" />
<action name="validate-all" timeout="20" />
</actions>
</resource-agent>
END
}
#######################################################################
: ${OCF_RESKEY_daemon_options:="-d0"}
sbindir=$HA_SBIN_DIR
if [ -z $sbindir ]; then
sbindir=/usr/sbin
fi
DAEMON="clvmd"
CMIRROR="cmirrord"
DAEMON_PATH="${sbindir}/clvmd"
CMIRROR_PATH="${sbindir}/cmirrord"
LOCK_FILE="/var/lock/subsys/$DAEMON"
LVM_VGCHANGE=${sbindir}/vgchange
LVM_VGDISPLAY=${sbindir}/vgdisplay
LVM_VGSCAN=${sbindir}/vgscan
# Leaving this in for legacy. We do not want to advertize
# the abilty to set options in the systconfig exists, we want
# to expand the OCF style options as necessary instead.
[ -f /etc/sysconfig/cluster ] && . /etc/sysconfig/cluster
[ -f /etc/sysconfig/$DAEMON ] && . /etc/sysconfig/$DAEMON
CLVMD_TIMEOUT="90"
if [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then
CLVMD_TIMEOUT=$(($OCF_RESKEY_CRM_meta_timeout/1000))
fi
clvmd_usage()
{
cat <<END
usage: $0 {start|stop|monitor|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}
clvmd_validate()
{
# check_binary will exit with OCF_ERR_INSTALLED
# when binary is missing
check_binary "pgrep"
check_binary $DAEMON_PATH
if ocf_is_true $OCF_RESKEY_with_cmirrord; then
check_binary $CMIRROR_PATH
fi
if [ "$__OCF_ACTION" != "monitor" ]; then
check_binary "killall"
check_binary $LVM_VGCHANGE
check_binary $LVM_VGDISPLAY
check_binary $LVM_VGSCAN
fi
# Future validation checks here.
return $OCF_SUCCESS
}
check_process()
{
local binary=$1
local pidfile="${HA_RSCTMP}/${binary}-${OCF_RESOURCE_INSTANCE}.pid"
local pid
ocf_log debug "Checking status for ${binary}."
if [ -e "$pidfile" ]; then
cat /proc/$(cat $pidfile)/cmdline 2>/dev/null | grep -a "${binary}" > /dev/null 2>&1
if [ $? -eq 0 ];then
# shortcut without requiring pgrep to search through all procs
return $OCF_SUCCESS
fi
fi
pid=$(pgrep ${binary})
case $? in
0)
ocf_log info "PID file (pid:${pid} at $pidfile) created for ${binary}."
echo "$pid" > $pidfile
return $OCF_SUCCESS;;
1)
rm -f "$pidfile" > /dev/null 2>&1
ocf_log info "$binary is not running"
return $OCF_NOT_RUNNING;;
*)
rm -f "$pidfile" > /dev/null 2>&1
ocf_log err "Error encountered detecting pid status of $binary"
return $OCF_ERR_GENERIC;;
esac
}
clvmd_status()
{
local rc
local mirror_rc
clvmd_validate
if [ $? -ne $OCF_SUCCESS ]; then
ocf_log error "Unable to monitor, Environment validation failed."
return $?
fi
check_process $DAEMON
rc=$?
mirror_rc=$rc
if ocf_is_true $OCF_RESKEY_with_cmirrord; then
check_process $CMIRROR
mirror_rc=$?
fi
# If these ever don't match, return error to force recovery
if [ $mirror_rc -ne $rc ]; then
return $OCF_ERR_GENERIC
fi
return $rc
}
# NOTE: replace this with vgs, once display filter per attr is implemented.
clustered_vgs() {
${LVM_VGDISPLAY} 2>/dev/null | awk 'BEGIN {RS="VG Name"} {if (/Clustered/) print $1;}'
}
wait_for_process()
{
local binary=$1
local timeout=$2
local count=0
ocf_log info "Waiting for $binary to exit"
usleep 500000
while [ $count -le $timeout ]; do
check_process $binary
if [ $? -eq $OCF_NOT_RUNNING ]; then
ocf_log info "$binary terminated"
return $OCF_SUCCESS
fi
sleep 1
count=$((count+1))
done
return $OCF_ERR_GENERIC
}
time_left()
{
local end=$1
local default=$2
local now=$SECONDS
local result=0
result=$(( $end - $now ))
if [ $result -lt $default ]; then
return $default
fi
return $result
}
clvmd_stop()
{
local LVM_VGS
local rc=$OCF_SUCCESS
local end=$(( $SECONDS + $CLVMD_TIMEOUT ))
clvmd_status
if [ $? -eq $OCF_NOT_RUNNING ]; then
return $OCF_SUCCESS
fi
check_process $DAEMON
if [ $? -ne $OCF_NOT_RUNNING ]; then
LVM_VGS="$(clustered_vgs)"
if [ -n "$LVM_VGS" ]; then
ocf_log info "Deactivating clustered VG(s):"
ocf_run ${LVM_VGCHANGE} -anl $LVM_VGS
if [ $? -ne 0 ]; then
ocf_log error "Failed to deactivate volume groups, cluster vglist = $LVM_VGS"
return $OCF_ERR_GENERIC
fi
fi
ocf_log info "Signaling $DAEMON to exit"
killall -TERM $DAEMON
if [ $? != 0 ]; then
ocf_log error "Failed to signal -TERM to $DAEMON"
return $OCF_ERR_GENERIC
fi
wait_for_process $DAEMON $CLVMD_TIMEOUT
rc=$?
if [ $rc -ne $OCF_SUCCESS ]; then
ocf_log error "$DAEMON failed to exit"
return $rc
fi
rm -f $LOCK_FILE
fi
check_process $CMIRROR
if [ $? -ne $OCF_NOT_RUNNING ] && ocf_is_true $OCF_RESKEY_with_cmirrord; then
local timeout
ocf_log info "Signaling $CMIRROR to exit"
killall -INT $CMIRROR
time_left $end 10; timeout=$?
wait_for_process $CMIRROR $timeout
rc=$?
if [ $rc -ne $OCF_SUCCESS ]; then
killall -KILL $CMIRROR
time_left $end 10; timeout=$?
wait_for_process $CMIRROR $(time_left $end 10)
rc=$?
fi
fi
return $rc
}
start_process()
{
local binary_path=$1
local opts=$2
check_process "$(basename $binary_path)"
if [ $? -ne $OCF_SUCCESS ]; then
ocf_log info "Starting $binary_path: "
ocf_run $binary_path $opts
rc=$?
if [ $rc -ne 0 ]; then
ocf_log error "Failed to launch $binary_path, exit code $rc"
exit $OCF_ERR_GENERIC
fi
fi
return $OCF_SUCCESS
}
clvmd_activate_all()
{
# Activate all volume groups by leaving the
# "volume group name" parameter empty
ocf_run ${LVM_VGCHANGE} -aay
if [ $? -ne 0 ]; then
ocf_log info "Failed to activate VG(s):"
clvmd_stop
return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
clvmd_start()
{
local rc=0
local CLVMDOPTS="-T${CLVMD_TIMEOUT} $OCF_RESKEY_daemon_options"
clvmd_validate
if [ $? -ne $OCF_SUCCESS ]; then
ocf_log error "Unable to start, Environment validation failed."
return $?
fi
clvmd_status
if [ $? -eq $OCF_SUCCESS ]; then
ocf_log debug "$DAEMON already started"
clvmd_activate_all
return $?;
fi
# if either of these fail, script will exit OCF_ERR_GENERIC
if ocf_is_true $OCF_RESKEY_with_cmirrord; then
start_process $CMIRROR_PATH
fi
start_process $DAEMON_PATH $CLVMDOPTS
# Refresh local cache.
#
# It's possible that new PVs were added to this, or other VGs
# while this node was down. So we run vgscan here to avoid
# any potential "Missing UUID" messages with subsequent
# LVM commands.
# The following step would be better and more informative to the user:
# 'action "Refreshing VG(s) local cache:" ${LVM_VGSCAN}'
# but it could show warnings such as:
# 'clvmd not running on node x-y-z Unable to obtain global lock.'
# and the action would be shown as FAILED when in reality it didn't.
# Ideally vgscan should have a startup mode that would not print
# unnecessary warnings.
${LVM_VGSCAN} > /dev/null 2>&1
touch $LOCK_FILE
clvmd_activate_all
clvmd_status
return $?
}
case $__OCF_ACTION in
meta-data) meta_data
exit $OCF_SUCCESS;;
start) clvmd_start;;
stop) clvmd_stop;;
monitor) clvmd_status;;
validate-all) clvmd_validate;;
usage|help) clvmd_usage;;
*) clvmd_usage
exit $OCF_ERR_UNIMPLEMENTED;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc
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Sun, Jul 20, 7:38 PM (3 h, 8 m)
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