nrpe（nagios客戶端）系統開機自啓動腳本

1、nrpe（nagios客戶端）系統開機自啓動腳本：

#!/bin/bash
#chkconfig: - 60 98
#description: This shell script is used to control nrpe(nagios's client) service===>{start|stop|status|restart} the nrpe.
#scriptname: /etc/init.d/nrped
#explain: my nrpe's prefix path is "/usr/local/nagios"
#
#There are some commands below:
#chmod u+x /etc/init.d/nrped
#chkconfig --add nrped
#chkconfig nrped off
#
#cat >>/etc/rc.local<<EOF
#
##This shell script is used to control nrpe(nagios's client) service===>{start|stop|status|restart} the nrpe.
#/etc/init.d/nrped start
#
#EOF
#
#author:freeflybird
#blog:https://blog.csdn.net/CPPCPPCPPCPP

[ $UID -ne 0 ] && {
	echo "You must use the \"root\" user to operation nrpe!"
	exit 1
}
[ -f /etc/init.d/functions ] && . /etc/init.d/functions

workdirPrefix=/usr/local
if [ ! -d $workdirPrefix ];then
	mkdir -p $workdirPrefix || {
		echo "Unknown ERROR!Anyway,this directory \"$workdirPrefix\" does not exist!"
		exit 1
	}
fi

nrpeBin=$workdirPrefix/nagios/bin/nrpe
nrpeCfg=$workdirPrefix/nagios/etc/nrpe.cfg
statusnrpeCmd="ps -ef|grep 'nrpe.cfg'|grep -v grep"

#state value of return
RETVAL=0

actionInfo(){
	#arg1:execute status ago a statement
	#arg2:the infomation to print
	if [ "$1" = "0" ] ;then
		action "$2" /bin/true
	else
		action "$2" /bin/false
	fi
	return $1
}

getnrpePid(){
	result=$(eval $statusnrpeCmd)
	pid=$(echo $result|awk '{ if($3=1) print  $2}')
	echo $pid
}

start(){
	eval $statusnrpeCmd &>/tmp/nrpe.log
	RETVAL=$?
	if [ $RETVAL -eq 0 ];then
		echo "nrpe has been being already running until now."
		status
	else
		$nrpeBin -c $nrpeCfg -d
		RETVAL=$?
		actionInfo $RETVAL "Starting nrpe"
	fi
	return $RETVAL
}

stop(){
	eval $statusnrpeCmd &>/tmp/nrpe.log
	RETVAL=$?
	if [ $RETVAL -ne 0 ];then
		echo "nrpe has been being already stopped until now.Or nrpe has not been started ago."
		RETVAL=0
	else
		pid=$(getnrpePid)
		kill $pid
		eval $statusnrpeCmd &>/tmp/nrpe.log
		RETVAL=$?
		if [ $RETVAL -ne 0 ];then
			RETVAL=0
			actionInfo $RETVAL "Stopping nrpe"
		else
			RETVAL=1
			actionInfo $RETVAL "Stopping nrpe"
			pid=$(getnrpePid)
			kill $pid
			eval $statusnrpeCmd &>/tmp/nrpe.log
			RETVAL=$?
			if [ $RETVAL -ne 0 ];then
				RETVAL=0
				actionInfo $RETVAL "Retry stopping nrpe"
			else
				RETVAL=1
				actionInfo $RETVAL "Retry stopping nrpe"
			fi
		fi
	fi
	return $RETVAL
}

restart(){
	stop && sleep 3 && start
	return $?
}

status(){
	eval $statusnrpeCmd &>/tmp/nrpe.log
	RETVAL=$?	
	if [ $RETVAL -ne 0 ];then
		echo "nrpe is stopped"  
	else
		pid=$(getnrpePid)
		echo "nrpe (pid  $pid) is running..."
	fi
	return $RETVAL
}

main(){
	case "$1" in
		start)
			start
			RETVAL=$?
			;;
		stop)
			stop
			RETVAL=$?
			;;
		restart)
			restart
			RETVAL=$?
			;;
		status)
			status
			RETVAL=$?
			;;
		*)
			echo "Usage: $0 {start|stop|restart|status}"
			exit 1
			;;
	esac
	exit $RETVAL
}
main $*

2、執行效果：

[root@client init.d]# /etc/init.d/nrped status
nrpe is stopped
[root@client init.d]# /etc/init.d/nrped 
Usage: /etc/init.d/nrped {start|stop|restart|status}
[root@client init.d]# /etc/init.d/nrped start
Starting nrpe [  OK  ]
[root@client init.d]# /etc/init.d/nrped status
nrpe (pid  108610) is running...
[root@client init.d]# ps -ef|grep nrpe.cfg|grep -v grep
nagios   108610      1  0 23:10 ?        00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
[root@client init.d]# /etc/init.d/nrped 
Usage: /etc/init.d/nrped {start|stop|restart|status}
[root@client init.d]# /etc/init.d/nrped  status
nrpe (pid  108610) is running...
[root@client init.d]# /etc/init.d/nrped  stop
Stopping nrpe [  OK  ]
[root@client init.d]# /etc/init.d/nrped  status
nrpe is stopped
[root@client init.d]# /etc/init.d/nrped  restart
nrpe has been being already stopped until now.Or nrpe has not been started ago.
Starting nrpe [  OK  ]
[root@client init.d]# /etc/init.d/nrped  status
nrpe (pid  108703) is running...
[root@client init.d]# ps -ef|grep nrpe.cfg|grep -v grep
nagios   108703      1  0 23:12 ?        00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
[root@client init.d]# /etc/init.d/nrped  status
nrpe (pid  108703) is running...
[root@client init.d]# /etc/init.d/nrped  stop
Stopping nrpe [  OK  ]
[root@client init.d]# ps -ef|grep nrpe.cfg|grep -v grep
[root@client init.d]#