#!/bin/sh
#
# Resource script for ndo2db daemon
#
# Description:  Manages ndo2db daemon as an OCF resource in 
#               an High Availability setup.
#
# Author:       Gerhard Lausser <gerhard.lausser@consol.de>
# License:      GNU General Public License (GPL) 
# Copyright:    (C) ConSol Software GmbH
#
# Changelog:
#
# 2009-11-13 1.0	initial release
#
#
#
#	usage: $0 {start|stop|status|monitor|validate-all|meta-data}
#
#	The "start" arg starts ndo2db.
#
#	The "stop" arg stops it.
#
# OCF parameters:
# OCF_RESKEY_binpath
# OCF_RESKEY_conffile
# OCF_RESKEY_pidfile
#
# Note:This RA requires that the ndo2db config files has a "lock_file" 
# entry so that it is able to act on the correct process
##########################################################################
# Initialization:

. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs

##########################################################################

DEFAULT_binpath=/usr/local/nagios/bin/ndo2db
DEFAULT_conffile=/usr/local/nagios/etc/ndo2db.cfg
DEFAULT_pidfile=/usr/local/nagios/var/ndo2db.lock

usage() {
  cat <<-!
usage: $0 {start|stop|status|monitor|validate-all|meta-data}

action:
        start   start the ndo2db daemon

        stop    stop the ndo2db daemon

        status  return the status of the ndo2db daemon, running or down

        methods return the set of commands we support

        monitor return TRUE if the ndo2db daemon appears to be working.
                There must be a process with the pid which can be found
                in the lockfile.

        meta-data       show meta data message

        validate-all    validate the instance parameters
	!
  exit $OCF_ERR_ARGS
}


meta_data() 
{
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="ndo2db">
<version>1.0</version>
<longdesc lang="en">
This script manages the ndo2db daemon
</longdesc>
<shortdesc lang="en">OCF Resource Agent compliant ndo2db daemon script.</shortdesc>

<parameters>

<parameter name="binpath">
<longdesc lang="en">
The ndo2db binary path.
</longdesc>
<shortdesc lang="en">Full path to the ndo2db binary</shortdesc>
<content type="string" default="$DEFAULT_binpath"/>
</parameter>

<parameter name="conffile">
<longdesc lang="en">
The ndo2db daemon configuration file name with full path. 
For example, "$DEFAULT_conffile"
</longdesc>
<shortdesc lang="en">Configuration file name with full path</shortdesc>
<content type="string" default="$DEFAULT_conffile" />
</parameter>

<parameter name="pidfile">
<longdesc lang="en">
The ndo2db daemon pid file name with full path. 
For example, "$DEFAULT_pidfile"
</longdesc>
<shortdesc lang="en">Pid file name with full path. </shortdesc>
<content type="string" default="$DEFAULT_pidfile" />
</parameter>

</parameters>

<actions>
<action name="start" timeout="90"/>
<action name="stop" timeout="100"/>
<action name="monitor" depth="10" timeout="30s" interval="60s" start-delay="1s" />
<action name="validate-all" timeout="30s"/>
<action name="meta-data"  timeout="5s"/>
</actions>
</resource-agent>
END
exit $OCF_SUCCESS
}

get_pid_and_bin_and_conf_file()
{
	if [ -n "$OCF_RESKEY_conffile" ]; then
		CONF_FILE=$OCF_RESKEY_conffile
	else
		CONF_FILE=$DEFAULT_conffile
	fi
	if [ -n "$OCF_RESKEY_binpath" ]; then
		BIN_FILE=$OCF_RESKEY_binpath
	else
		BIN_FILE=$DEFAULT_binpath
	fi
        if [ -f "$CONF_FILE" ]; then
                grep -v "^#" "$CONF_FILE" 2>/dev/null | grep "^lock_file" > /dev/null
                if [ $? -eq 0 ]; then
                        PID_FILE=`awk -F= '/^lock_file/ {print $2}' $CONF_FILE`
                fi
        else
                PID_FILE=
        fi

}

ndo2db_status()
{
        
	if [ -n "$PID_FILE" ] && [ -f $PID_FILE ]; then
		# ndo2db is probably running
		PID=`cat $PID_FILE`
		if [ -n "$PID" ]; then
			if ps -p $PID | grep ndo2db >/dev/null ; then
				ocf_log info "ndo2db running"
				return $OCF_SUCCESS
			else
				rm $PID_FILE 2>/dev/null
				ocf_log info "orphan pid file removed"
				return $OCF_SUCCES
			fi
		else
			ocf_log err "PID file empty!"
			return $OCF_ERR_GENERIC
		fi
	fi
		
	# ndo2db is not running
	ocf_log info "ndo2db is not running"
	return $OCF_NOT_RUNNING
}

ndo2db_start()
{
	# if ndo2db is running return success
	ndo2db_status
	retVal=$?
	if [ $retVal -eq $OCF_SUCCESS ]; then
		exit $OCF_SUCCESS
	elif [ $retVal -ne $OCF_NOT_RUNNING ]; then
		ocf_log err "Error. Unknown status."
		exit $OCF_ERR_GENERIC
	fi

	COMMAND="$BIN_FILE -c $CONF_FILE"

        if [ -x "$BIN_FILE" -a -f "$CONF_FILE" ]; then
                if  grep -v "^#" "$CONF_FILE" | grep "lock_file" > /dev/null ; then
                        $COMMAND;
                        if [ $? -ne 0 ]; then
                                ocf_log err "Error. ndo2db returned error $?."
                                exit $OCF_ERR_GENERIC
                        fi
                else
                        ocf_log err "Error. \"lock_file\" entry required in the ndo2db config file by ndo2db OCF RA."
                        return $OCF_ERR_GENERIC
                fi
        
        	ocf_log info "Started ndo2db daemon."
        	exit $OCF_SUCCESS
        else
                ocf_log err "Error. Cannot start without $BIN_FILE and $CONF_FILE"
                exit $OCF_ERR_CONFIGURED
        fi
}


ndo2db_stop()
{
	if ndo2db_status ; then
		PID=`cat $PID_FILE`
		if [ -n "$PID" ] ; then
			kill $PID
			if [ $? -ne 0 ]; then
				kill -SIGKILL $PID
				if [ $? -ne 0 ]; then
					ocf_log err "Error. Could not stop ndo2db."
					return $OCF_ERR_GENERIC
				fi
			fi
			rm $PID_FILE 2>/dev/null
		else
			ocf_log err "Error. Don't know which pid to kill."
			exit $OCF_ERR_GENERIC
		fi
	fi
	ocf_log info "Stopped ndo2db."
	exit $OCF_SUCCESS
}

ndo2db_monitor()
{
	ndo2db_status
}

ndo2db_validate_all()
{
	if [ -n "$BIN_FILE" -a ! -x "$BIN_FILE" ]; then
		ocf_log err "Binary path $BIN_FILE does not exist."
		exit $OCF_ERR_ARGS
	fi
	if [ -n "$CONF_FILE" -a ! -f "$CONF_FILE" ]; then
		ocf_log err "Config file $CONF_FILE does not exist."
		exit $OCF_ERR_ARGS
	fi
        if  grep -v "^#" "$CONF_FILE" | grep "^lock_file" > /dev/null ; then 
                :
        else
                ocf_log err "Error. \"lock_file\" entry required in the ndo2db config file by ndo2db OCF RA."
                return $OCF_ERR_GENERIC
        fi

	return $OCF_SUCCESS
}


#
# Main
#
 
if [ $# -ne 1 ]; then
	usage
	exit $OCF_ERR_ARGS
fi

case $1 in
	start)	get_pid_and_bin_and_conf_file
		ndo2db_start
		;;
	
	stop)	get_pid_and_bin_and_conf_file
		ndo2db_stop
		;;

	status)	get_pid_and_bin_and_conf_file
		ndo2db_status
		;;

	monitor)get_pid_and_bin_and_conf_file
		ndo2db_monitor
		;;

	validate-all)	get_pid_and_bin_and_conf_file
			ndo2db_validate_all
			;;

	meta-data)	meta_data
			;;

	usage)	usage
		exit $OCF_SUCCESS
		;;

	*)	usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac