The RGM calls the Update method to notify a running resource that its properties have been changed.
Example 14 dns_update Method#!/bin/ksh
# Update method for HA-DNS.
# The actual updates to properties are done by the RGM. Updates affect only
# the fault monitor so this method must restart the fault monitor.
#pragma ident “@(#)dns_update 1.1 12/01/24”
###############################################################################
# Parse program arguments.
#
function parse_args # [args ...]
{
typeset opt
while getopts `R:G:T:' opt
do
case “$opt” in
R)
# Name of the DNS resource.
RESOURCE_NAME=$OPTARG
;;
G)
# Name of the resource group in which the resource is
# configured.
RESOURCEGROUP_NAME=$OPTARG
;;
T)
# Name of the resource type.
RESOURCETYPE_NAME=$OPTARG
;;
*)
logger -p ${SYSLOG_FACILITY}.err \
-t [$RESOURCETYPE_NAME,$RESOURCEGROUP_NAME,$RESOURCE_NAME] \
“ERROR: Option $OPTARG unknown”
exit 1
;;
esac
done
}
###############################################################################
# MAIN
###############################################################################
export PATH=/bin:/usr/bin:/usr/cluster/bin:/usr/sbin:/usr/proc/bin:$PATH
# Obtain the syslog facility to use to log messages.
SYSLOG_FACILITY=`scha_cluster_get -O SYSLOG_FACILITY`
# Parse the arguments that have been passed to this method
parse_args “$@”
PMF_TAG=$RESOURCE_NAME.monitor
SYSLOG_TAG=$RESOURCETYPE_NAME,$RESOURCEGROUP_NAME,$RESOURCE_NAME
# Find where the probe method resides by obtaining the value of the
# RT_basedir property of the resource.
RT_BASEDIR=`scha_resource_get -O RT_basedir -R $RESOURCE_NAME \
-G $RESOURCEGROUP_NAMÈ
# When the Update method is called, the RGM updates the value of the property
# being updated. This method must check if the fault monitor (probe)
# is running, and if so, kill it and then restart it.
if pmfadm -q $PMF_TAG.monitor; then
# Kill the monitor that is running already
pmfadm -s $PMF_TAG.monitor TERM
if [ $? -ne 0 ]; then
logger -p ${SYSLOG_FACILITY}.err -t [$SYSLOG_TAG] \
“${ARGV0} Could not stop the monitor”
exit 1
else
# Could successfully stop DNS. Log a message.
logger -p ${SYSLOG_FACILITY}.info -t [$SYSLOG_TAG] \
“Monitor for HA-DNS successfully stopped”
fi
# Restart the monitor.
pmfadm -c $PMF_TAG.monitor -n -1 -t -1 $RT_BASEDIR/dns_probe \
-R $RESOURCE_NAME -G $RESOURCEGROUP_NAME -T $RESOURCETYPE_NAME
if [ $? -ne 0 ]; then
logger -p ${SYSLOG_FACILITY}.err -t [$SYSLOG_TAG] \
“${ARGV0} Could not restart monitor for HA-DNS “
exit 1
else
logger -p ${SYSLOG_FACILITY}.info -t [$SYSLOG_TAG] \
“Monitor for HA-DNS successfully restarted”
fi
fi
exit 0