查看“进程监控脚本并避免重复执行脚本”的源代码

[[category:shell]] [[category:devops]]  
==mysql进程监控脚本shell==
<pre>
cndw version 

CPID=$$   #$$ 是脚本运行的当前进程ID号
RUN="`ps -ef | grep "$0" | grep -v "grep" | grep -v "$CPID" | wc -l`"  #$0 是脚本本身>的名字
[ "$RUN" -gt 1 ] && exit


qcloud version  2022 
详细请见最下面
agent_name="$installPath/bin/sgagent"
check_alive()
{
    status=`ps ax | grep "$agent_name" | grep -v "grep" |wc -l`

    if [ $status -ne 0 ]; then
        # process exist
        echo "stargate agent already exist"
        exit 1
    fi
}

### Main Begin ###

check_user
check_alive






#!/bin/bash
# 请放到crontab中运行，如（注意要以后台方式运行，因为脚本是常驻不退出的）：
# Usage */20 * * * *   /home/mon/proce-moin.sh   > /dev/null 2>&1 &

LOCK_FILE="/tmp/my.lock"
if [[ -e $LOCK_FILE ]] ; then
echo "re-entry, exiting"
exit 1
fi

### Placing lock file
touch $LOCK_FILE
echo -n "Started..."


 #ps -ef | grep  proce-moin
#if [ $? -eq 0 ]
#then 
#	exit 0
#fi
#checkmyself 
#mypn=`ps -ef | grep proce-moin | grep -v grep | wc -l`
##if  [ $mypn -gt 1 ]
#if  [ -n "$myupn" ]
#then 
#    exit 0
#fi
#


 ps -ef | grep mysqld | grep -v grep
 if  [ $? -eq 0 ]
 then 
	 echo  "mysqlok"
        #exit 1
 else
	 systemctl  start  mysqld.service

 fi
 sleep  500
### Removing lock
rm -f $LOCK_FILE

echo "Done."












[evan@prod-insurance-core ~]$ cat /usr/local/qcloud/stargate/admin/start.sh 
#!/bin/bash

umask 0022
unset IFS
unset OFS
unset LD_PRELOAD
unset LD_LIBRARY_PATH
export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'

if [ -w '/usr' ]; then
    installPath="/usr/local/qcloud/stargate"
else
    installPath="/var/lib/qcloud/stargate"
fi
agent_name="$installPath/bin/sgagent"

check_user()
{
    if [ "root" != "`whoami`" ]; then
        echo "Only root can execute this script"
        exit 2
    fi
}

check_alive()
{
    status=`ps ax | grep "$agent_name" | grep -v "grep" |wc -l`

    if [ $status -ne 0 ]; then
        # process exist
        echo "stargate agent already exist"
        exit 1
    fi
}

### Main Begin ###

check_user
check_alive
cd $(dirname $0)
export LD_LIBRARY_PATH=$installPath/lib:$LD_LIBRARY_PATH
$agent_name -d

ret=$?
if [ $ret -eq 0 ]
then
    echo "stargate agent run succ"
else
    echo "stargate agent run failed, errcode: $ret"
fi
exit $ret

### Main End ###

</pre>

=R=
https://github.com/eyjian/mooon/tree/master/mooon

[https://cloud.tencent.com/developer/article/1179668 通用的进程监控重拉起bash脚本process_monitor.sh]

[https://blog.csdn.net/Primeprime/article/details/78538757  shell脚本监控进程]


[https://blog.csdn.net/weixin_44100850/article/details/94588412  Shell脚本监控程序运行情况（重启程序）]

[https://segmentfault.com/a/1190000019444629 实现简单的监控脚本（Bash的执行和异常捕获）]