Please don't hate me, here's another update. Some more -ne instead of !=
Dominik
#!/bin/bash
#
#
# An OCF RA for conntrackd
# http://conntrack-tools.netfilter.org/
#
# Copyright (c) 2010 Dominik Klein
#
# 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_ROOT}/resource.d/heartbeat/.ocf-shellfuncs
export LANG=C LANGUAGE=C LC_ALL=C
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="conntrackd">
<version>1.1</version>
<longdesc lang="en">
Master/Slave OCF Resource Agent for conntrackd
</longdesc>
<shortdesc lang="en">This resource agent manages conntrackd</shortdesc>
<parameters>
<parameter name="conntrackd">
<longdesc lang="en">Full path to conntrackd executable</longdesc>
<shortdesc lang="en">Full path to conntrackd executable</shortdesc>
<content type="string" default="/usr/sbin/conntrackd"/>
</parameter>
<parameter name="conntrackdconf">
<longdesc lang="en">Full path to the conntrackd.conf file.</longdesc>
<shortdesc lang="en">Path to conntrackd.conf</shortdesc>
<content type="string" default="/etc/conntrackd/conntrackd.conf"/>
</parameter>
<parameter name="statefile">
<longdesc lang="en">Full path to the state file you wish to use.</longdesc>
<shortdesc lang="en">Full path to the state file you wish to use.</shortdesc>
<content type="string" default="/var/run/conntrackd.master"/>
</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" role="Slave" />
<action name="monitor" depth="0" timeout="20" interval="10" role="Master" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="30" />
</actions>
</resource-agent>
END
}
meta_expect()
{
local what=$1 whatvar=OCF_RESKEY_CRM_meta_${1//-/_} op=$2 expect=$3
local val=${!whatvar}
if [[ -n $val ]]; then
# [, not [[, or it won't work ;)
[ $val $op $expect ] && return
fi
ocf_log err "meta parameter misconfigured, expected $what $op $expect,
but found ${val:-unset}."
exit $OCF_ERR_CONFIGURED
}
conntrackd_is_master() {
# You can't query conntrackd whether it is master or slave. It can be
both at the same time.
# This RA creates a statefile during promote and enforces master-max=1
and clone-node-max=1
if [ -e $STATEFILE ]; then
return $OCF_SUCCESS
else
return $OCF_ERR_GENERIC
fi
}
conntrackd_set_master_score() {
${HA_SBIN_DIR}/crm_master -Q -l reboot -v $1
}
conntrackd_monitor() {
rc=$OCF_NOT_RUNNING
# It does not write a PID file, so check with pgrep
pgrep -f $CONNTRACKD && rc=$OCF_SUCCESS
if [ "$rc" -eq "$OCF_SUCCESS" ]; then
# conntrackd is running
# now see if it acceppts queries
if ! $CONNTRACKD -C $CONNTRACKD_CONF -s > /dev/null 2>&1; then
rc=$OCF_ERR_GENERIC
ocf_log err "conntrackd is running but not responding
to queries"
fi
if conntrackd_is_master; then
rc=$OCF_RUNNING_MASTER
# Restore master setting on probes
if [ $OCF_RESKEY_CRM_meta_interval -eq 0 ]; then
conntrackd_set_master_score $master_score
fi
else
# Restore master setting on probes
if [ $OCF_RESKEY_CRM_meta_interval -eq 0 ]; then
conntrackd_set_master_score $slave_score
fi
fi
fi
return $rc
}
conntrackd_start() {
rc=$OCF_ERR_GENERIC
# Keep trying to start the resource;
# wait for the CRM to time us out if this fails
while :; do
conntrackd_monitor
status=$?
case "$status" in
$OCF_SUCCESS)
rc=$OCF_SUCCESS
conntrackd_set_master_score 100
break
;;
$OCF_NOT_RUNNING)
ocf_log info "Starting conntrackd"
$CONNTRACKD -C $CONNTRACKD_CONF -d
;;
$OCF_RUNNING_MASTER)
ocf_log warn "conntrackd already in master mode,
demoting."
rm -f $statefile
;;
$OCF_ERR_GENERIC)
ocf_log err "conntrackd start failed"
rc=$OCF_ERR_GENERIC
break
;;
esac
done
return $rc
}
conntrackd_stop() {
rc=$OCF_ERR_GENERIC
# Keep trying to bring down the resource;
# wait for the CRM to time us out if this fails
while :; do
conntrackd_monitor
status=$?
case "$status" in
$OCF_SUCCESS)
ocf_log info "Stopping conntrackd"
$CONNTRACKD -C $CONNTRACKD_CONF -k
;;
$OCF_NOT_RUNNING)
rc=$OCF_SUCCESS
break
;;
$OCF_RUNNING_MASTER)
ocf_log warn "conntrackd still master"
;;
esac
done
return $rc
}
conntrackd_validate_all() {
check_binary "$CONNTRACKD"
if ! [ -e "$CONNTRACKD_CONF" ]; then
ocf_log err "Config FILE $CONNTRACKD_CONF does not exist"
return $OCF_ERR_INSTALLED
fi
statedir=$(dirname $STATEFILE)
if [ -d "$statedir" ]; then
if ! [ -w "$statedir" ]; then
ocf_log err "Directory $statedir for statefile
$STATEFILE is not writable."
return $OCF_ERR_PERM
fi
else
ocf_log err "Directory $statedir for statefile $STATEFILE does
not exist."
return $OCF_ERR_INSTALLED
fi
meta_expect master-node-max = 1
meta_expect master-max = 1
meta_expect clone-node-max = 1
meta_expect clone-max = 2
return $OCF_SUCCESS
}
conntrackd_promote() {
rc=$OCF_SUCCESS
if ! conntrackd_is_master; then
# -c = Commit the external cache to the kernel
# -f = Flush internal and external cache
# -R = resync with the kernel table
# -B = send a bulk update on the line
for parm in c f R B; do
if ! $CONNTRACKD -C $CONNTRACKD_CONF -$parm; then
ocf_log err "$CONNTRACKD -C $CONNTRACKD_CONF
-$parm failed during promote."
rc=$OCF_ERR_GENERIC
break
fi
done
touch $STATEFILE
conntrackd_set_master_score $master_score
fi
return $rc
}
conntrackd_demote() {
rc=$OCF_SUCCESS
if conntrackd_is_master; then
# -t = shorten kernel timers to remove zombies
# -n = request a resync from the others
for parm in t n; do
if ! $CONNTRACKD -C $CONNTRACKD_CONF -$parm; then
ocf_log err "$CONNTRACKD -C $CONNTRACKD_CONF
-$parm failed during demote."
rc=$OCF_ERR_GENERIC
break
fi
done
rm -f $STATEFILE
conntrackd_set_master_score $slave_score
fi
return $rc
}
conntrackd_notify() {
hostname=$(hostname)
# OCF_RESKEY_CRM_meta_notify_master_uname is a whitespace separated
list of master hostnames
for master in $OCF_RESKEY_CRM_meta_notify_master_uname; do
# if we are the master and an instance was just started on
another node:
# send a bulk update to allow failback
if [ "$hostname" = "$master" -a
"$OCF_RESKEY_CRM_meta_notify_type" = "post" -a
"$OCF_RESKEY_CRM_meta_notify_operation" = "start" -a
"$OCF_RESKEY_CRM_meta_notify_start_uname" != "$hostname" ]; then
ocf_log info "Sending bulk update in post start to
peers to allow failback"
$CONNTRACKD -C $CONNTRACKD_CONF -B
fi
done
for tobepromoted in $OCF_RESKEY_CRM_meta_notify_promote_uname; do
# if there is a promote action to be executed on another node:
# send a bulk update to allow failback
if [ "$hostname" != "$tobepromoted" -a
"$OCF_RESKEY_CRM_meta_notify_type" = "pre" -a
"$OCF_RESKEY_CRM_meta_notify_operation" = "promote" ]; then
ocf_log info "Sending bulk update in pre promote to
peers to allow failback"
$CONNTRACKD -C $CONNTRACKD_CONF -B
fi
done
}
conntrackd_usage() {
cat <<EOF
usage: $0 {start|stop|promote|demote|monitor|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
EOF
}
CONNTRACKD=$OCF_RESKEY_conntrackd
if [ -z "$CONNTRACKD" ]; then
CONNTRACKD=/usr/sbin/conntrackd
fi
CONNTRACKD_CONF=$OCF_RESKEY_configfile
if [ -z "$CONNTRACKD_CONF" ]; then
CONNTRACKD_CONF=/etc/conntrackd/conntrackd.conf
fi
STATEFILE=$OCF_RESKEY_statefile
if [ -z "$STATEFILE" ]; then
STATEFILE=/var/run/conntrackd.master
fi
master_score=1000
slave_score=100
#######################################################################
if [ $# -ne 1 ]; then
conntrackd_usage
exit $OCF_ERR_ARGS
fi
case $__OCF_ACTION in
meta-data)
meta_data
exit $OCF_SUCCESS
;;
usage)
conntrackd_usage
exit $OCF_SUCCESS
esac
# Everything except usage and meta-data must pass the validate test
conntrackd_validate_all || exit
case $__OCF_ACTION in
start)
conntrackd_start
;;
stop)
conntrackd_stop
;;
promote)
conntrackd_promote
;;
demote)
conntrackd_demote
;;
status|monitor)
conntrackd_monitor
;;
notify)
conntrackd_notify
;;
validate-all)
;;
*)
conntrackd_usage
exit $OCF_ERR_UNIMPLEMENTED
esac
# exit code is the exit code (return code) of the last command (shell function)
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