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#!/bin/sh
#
# Description:  Manages a Tomcat Server as an OCF High-Availability
#               resource under Heartbeat/LinuxHA control
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
# 02110-1301, USA.
#
# Copyright (c) 2007 NIPPON TELEGRAPH AND TELEPHONE CORPORATION
#
#######################################################################
# OCF parameters:
#   OCF_RESKEY_tomcat_name - The name of the resource. Default is tomcat
#   OCF_RESKEY_script_log  - A destination of the log of this script. Default /var/log/OCF_RESKEY_tomcat_name.log
#   OCF_RESKEY_tomcat_stop_timeout  - Time-out at the time of the stop. Default is 5. DEPRECATED
#   OCF_RESKEY_tomcat_suspend_trialcount  - The re-try number of times awaiting a stop. Default is 10. DEPRECATED
#   OCF_RESKEY_tomcat_user  - A user name to start a resource. Default is root
#   OCF_RESKEY_statusurl - URL for state confirmation. Default is http://127.0.0.1:8080
#   OCF_RESKEY_java_home - Home directory of Java. Default is none
#   OCF_RESKEY_java_opts - Options to pass to Java JVM for start and stop. Default is none
#   OCF_RESKEY_catalina_home - Home directory of Tomcat. Default is none
#   OCF_RESKEY_catalina_base - Base directory of Tomcat. Default is OCF_RESKEY_catalina_home
#   OCF_RESKEY_catalina_pid  - A PID file name of Tomcat. Default is OCF_RESKEY_catalina_home/logs/catalina.pid
#   OCF_RESKEY_tomcat_start_opts - Start options of Tomcat. Default is none.
#   OCF_RESKEY_catalina_opts - CATALINA_OPTS environment variable. Default is none.
#   OCF_RESKEY_catalina_rotate_log - Control catalina.out logrotation flag. Default is NO.
#   OCF_RESKEY_catalina_rotatetime - catalina.out logrotation time span(seconds). Default is 86400.
###############################################################################


: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

############################################################################
# Usage
usage() 
{
	cat <<-!
usage: $0 action

action:
        start   start Tomcat

        stop    stop Tomcat

        status  return the status of Tomcat, up or down

        monitor  return TRUE if Tomcat appears to be working.
                 You have to have installed $WGETNAME for this to work.

        meta-data       show meta data message

        validate-all    validate the instance parameters
!
}

############################################################################
# Check tomcat service availability
isrunning_tomcat()
{
	if ! have_binary $WGET; then
		ocf_log err "Monitoring not supported by $OCF_RESOURCE_INSTANCE"
		ocf_log info "Please make sure that wget is available"
		return $OCF_ERR_CONFIGURED
	fi
	$WGET -O /dev/null $RESOURCE_STATUSURL >/dev/null 2>&1
}

############################################################################
# 
isalive_tomcat()
{
	pgrep -f "${SEARCH_STR}" > /dev/null 
}
############################################################################
# Check tomcat process and service availability
monitor_tomcat()
{
	isalive_tomcat ||
		return $OCF_NOT_RUNNING
	isrunning_tomcat ||
		return $OCF_NOT_RUNNING
	return $OCF_SUCCESS
}

############################################################################
# Execute catalina.out log rotation
rotate_catalina_out()
{
	# Look for rotatelogs/rotatelogs2
	if [ -x /usr/sbin/rotatelogs ]; then
		ROTATELOGS=/usr/sbin/rotatelogs
	elif [ -x /usr/sbin/rotatelogs2 ]; then
		ROTATELOGS=/usr/sbin/rotatelogs2
	else
		ocf_log warn "rotatelogs command not found."
		return 1
	fi

	# Clean up and set permissions on required files
	rm -rf "$CATALINA_HOME"/temp/* "$CATALINA_HOME/logs/catalina.out"
	mkfifo -m700 "$CATALINA_HOME/logs/catalina.out"
	chown --dereference "$RESOURCE_TOMCAT_USER" "$CATALINA_HOME/logs/catalina.out" || true

	# -s is required because tomcat5.5's login shell is /bin/false
	su - -s /bin/sh $RESOURCE_TOMCAT_USER \
        	-c "$ROTATELOGS -l \"$CATALINA_HOME/logs/catalina_%F.log\" $CATALINA_ROTATETIME" \
        	< "$CATALINA_HOME/logs/catalina.out" > /dev/null 2>&1 &
}

############################################################################
# Start Tomcat
start_tomcat()
{
	cd "$CATALINA_HOME/bin"

	monitor_tomcat
	if [ $? = $OCF_SUCCESS ]; then
		return $OCF_SUCCESS
	fi

	#ocf_log debug "catalina.out rotation FLG = ${CATALINA_ROTATE_LOG}"
	if [ ${CATALINA_ROTATE_LOG} = "YES" ]; then
		rotate_catalina_out
		if [ $? = 0 ]; then
			ocf_log debug "Rotate catalina.out succeeded."
		else
			ocf_log warn "Rotate catalina.out failed. Starting tomcat without catalina.out rotation."
		fi
	fi
	
	echo "`date "+%Y/%m/%d %T"`: start ===========================" >> "$TOMCAT_CONSOLE"

	ocf_log debug "CATALINA_OPTS value = ${CATALINA_OPTS}"
	if [ "$RESOURCE_TOMCAT_USER" = RUNASIS ]; then
		"$CATALINA_HOME/bin/catalina.sh" start $TOMCAT_START_OPTS \
			>> "$TOMCAT_CONSOLE" 2>&1 &
	else
		cat<<-END_TOMCAT_START | su - -s /bin/sh "$RESOURCE_TOMCAT_USER" >> "$TOMCAT_CONSOLE" 2>&1 &
			export JAVA_HOME=${JAVA_HOME}
			export JAVA_OPTS="${JAVA_OPTS}"
			export CATALINA_HOME=${CATALINA_HOME}
			export CATALINA_BASE=${CATALINA_BASE}
			export CATALINA_PID=${CATALINA_PID}
			export CATALINA_OPTS="${CATALINA_OPTS}"
			$CATALINA_HOME/bin/catalina.sh start ${TOMCAT_START_OPTS}
END_TOMCAT_START
	fi

	while true; do
		monitor_tomcat
		if [ $? = $OCF_SUCCESS ]; then
			break
		fi
		ocf_log debug "start_tomcat[$TOMCAT_NAME]: retry monitor_tomcat"
		sleep 3
	done

	return $OCF_SUCCESS
}

############################################################################
# Stop Tomcat
stop_tomcat()
{
	STOP_TIMEOUT=$((OCF_RESKEY_CRM_meta_timeout/1000-1))

	cd "$CATALINA_HOME/bin"

	echo "`date "+%Y/%m/%d %T"`: stop  ###########################" >> "$TOMCAT_CONSOLE"

	if [ "$RESOURCE_TOMCAT_USER" = RUNASIS ]; then
		"$CATALINA_HOME/bin/catalina.sh" stop $STOP_TIMEOUT -force \
			>> "$TOMCAT_CONSOLE" 2>&1
	else
		cat<<-END_TOMCAT_STOP | su - -s /bin/sh "$RESOURCE_TOMCAT_USER" >> "$TOMCAT_CONSOLE" 2>&1
			export JAVA_HOME=${JAVA_HOME}
			export JAVA_OPTS="${JAVA_OPTS}"
			export CATALINA_HOME=${CATALINA_HOME}
			export CATALINA_BASE=${CATALINA_BASE}
			export CATALINA_PID=${CATALINA_PID}
			$CATALINA_HOME/bin/catalina.sh stop $STOP_TIMEOUT -force
END_TOMCAT_STOP
	fi

	lapse_sec=0
	while isalive_tomcat; do
		sleep 1
		lapse_sec=`expr $lapse_sec + 1`
		ocf_log debug "stop_tomcat[$TOMCAT_NAME]: stop failed, killing with SIGKILL ($lapse_sec)"
		pkill -KILL -f "${SEARCH_STR}"
	done

	if [ ${CATALINA_ROTATE_LOG} = "YES" ]; then
		rm -f "$CATALINA_PID" "${CATALINA_HOME}/logs/catalina.out"
	else
		rm -f "$CATALINA_PID"
	fi
	return $OCF_SUCCESS
}

status_tomcat()
{
	return $OCF_SUCCESS
}


metadata_tomcat()
{
    cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="tomcat">
<version>1.0</version>

<longdesc lang="en">
Resource script for Tomcat. It manages a Tomcat instance as a cluster resource.
</longdesc>
<shortdesc lang="en">Manages a Tomcat servlet environment instance</shortdesc>

<parameters>

<parameter name="tomcat_name" unique="1" >
<longdesc lang="en"><![CDATA[
The name of the resource, added as a Java parameter in JAVA_OPTS:
-Dname=<tomcat_name> to Tomcat process on start. Used to ensure
process is still running and must be unique.
]]></longdesc>
<shortdesc>The name of the resource</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="script_log" unique="1">
<longdesc lang="en">
Log file, used during start and stop operations.
</longdesc>
<shortdesc>Log file</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="tomcat_stop_timeout" unique="0">
<longdesc lang="en">
Time-out for stop operation. DEPRECATED
</longdesc>
<shortdesc>Time-out for the stop operation. DEPRECATED</shortdesc>
<content type="integer" default="" />
</parameter>

<parameter name="tomcat_suspend_trialcount" unique="0">
<longdesc lang="en">
Maximum number of times to retry stop operation before suspending
and killing Tomcat. DEPRECATED. Does not retry.
</longdesc>
<shortdesc>Max retry count for stop operation. DEPRECATED</shortdesc>
<content type="integer" default="" />
</parameter>

<parameter name="tomcat_user" unique="0">
<longdesc lang="en">
The user who starts Tomcat.
</longdesc>
<shortdesc>The user who starts Tomcat</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="statusurl" unique="0">
<longdesc lang="en">
URL for state confirmation.
</longdesc>
<shortdesc>URL for state confirmation</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="java_home" unique="0" required="1">
<longdesc lang="en">
Home directory of Java.
</longdesc>
<shortdesc>Home directory of Java</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="java_opts" unique="0">
<longdesc lang="en">
Java JVM options used on start and stop.
</longdesc>
<shortdesc>Java options parsed to JVM, used on start and stop.</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_home" unique="1" required="1">
<longdesc lang="en">
Home directory of Tomcat.
</longdesc>
<shortdesc>Home directory of Tomcat</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_base" unique="1">
<longdesc lang="en">
Instance directory of Tomcat
</longdesc>
<shortdesc>Instance directory of Tomcat, defaults to catalina_home</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_pid" unique="1">
<longdesc lang="en">
A PID file name for Tomcat.
</longdesc>
<shortdesc>A PID file name for Tomcat</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="tomcat_start_opts" unique="0">
<longdesc lang="en">
Tomcat start options.
</longdesc>
<shortdesc>Tomcat start options</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_opts" unique="0">
<longdesc lang="en">
Catalina options, for the start operation only.
</longdesc>
<shortdesc>Catalina options</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_rotate_log" unique="0">
<longdesc lang="en">
Rotate catalina.out flag.
</longdesc>
<shortdesc>Rotate catalina.out flag</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="catalina_rotatetime" unique="0">
<longdesc lang="en">
catalina.out rotation interval (seconds).
</longdesc>
<shortdesc>catalina.out rotation interval (seconds)</shortdesc>
<content type="integer" default="" />
</parameter>

</parameters>

<actions>
<action name="start" timeout="60s" />
<action name="stop" timeout="120s" />
<action name="status" timeout="60" />
<action name="monitor" depth="0" timeout="30s" interval="10s" />
<action name="meta-data" timeout="5s" />
<action name="validate-all"  timeout="5"/>
</actions>
</resource-agent>
END
	return $OCF_SUCCESS
}

validate_all_tomcat()
{
	ocf_log info "validate_all_tomcat[$TOMCAT_NAME]"
	return $OCF_SUCCESS
}

#
### tomcat RA environment variables
#

TOMCAT_NAME="${OCF_RESKEY_tomcat_name-tomcat}"
TOMCAT_CONSOLE="${OCF_RESKEY_script_log-/var/log/$TOMCAT_NAME.log}"
RESOURCE_TOMCAT_USER="${OCF_RESKEY_tomcat_user-RUNASIS}"
RESOURCE_STATUSURL="${OCF_RESKEY_statusurl-http://127.0.0.1:8080}"

JAVA_HOME="${OCF_RESKEY_java_home}"
JAVA_OPTS="${OCF_RESKEY_java_opts}"
CATALINA_HOME="${OCF_RESKEY_catalina_home}"
CATALINA_BASE="${OCF_RESKEY_catalina_base-${OCF_RESKEY_catalina_home}}"
CATALINA_PID="${OCF_RESKEY_catalina_pid-$CATALINA_HOME/logs/catalina.pid}"

TOMCAT_START_OPTS="${OCF_RESKEY_tomcat_start_opts}"
CATALINA_OPTS="-Dname=$TOMCAT_NAME ${OCF_RESKEY_catalina_opts}"
CATALINA_ROTATE_LOG="${OCF_RESKEY_catalina_rotate_log-NO}"
CATALINA_ROTATETIME="${OCF_RESKEY_catalina_rotatetime-86400}"
SEARCH_STR="\\""${CATALINA_OPTS}"

export JAVA_HOME JAVA_OPTS CATALINA_HOME CATALINA_BASE CATALINA_PID CATALINA_OPTS

JAVA=${JAVA_HOME}/bin/java

#
# ------------------
# the main script
# ------------------
# 

COMMAND=$1

case "$COMMAND" in
	start)
		ocf_log debug  "[$TOMCAT_NAME] Enter tomcat start"
		start_tomcat
		func_status=$?
		ocf_log debug  "[$TOMCAT_NAME] Leave tomcat start $func_status"
		exit $func_status
		;;
	stop)
		ocf_log debug  "[$TOMCAT_NAME] Enter tomcat stop"
		stop_tomcat
		func_status=$?
		ocf_log debug  "[$TOMCAT_NAME] Leave tomcat stop $func_status"
		exit $func_status
		;;
	status)
		status_tomcat
		exit $?
		;;
	monitor)
		#ocf_log debug  "[$TOMCAT_NAME] Enter tomcat monitor"
		monitor_tomcat
		func_status=$?
		#ocf_log debug  "[$TOMCAT_NAME] Leave tomcat monitor $func_status"
		exit $func_status
		;;
	meta-data)
		metadata_tomcat
		exit $?
		;;
	validate-all)
		validate_all_tomcat
		exit $?
		;;
        usage|help)
                usage
                exit $OCF_SUCCESS
                ;;
	*)
		usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac