Evan：/* reference */

2022-07-13T03:50:59Z

reference

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

#!/bin/bash

Mycou=`ps -ef | grep data_from_ok:batch_clean | grep -v grep | wc -l`

if [ $Mycou -eq 0 ]
then
#echo 'run at' >>/data/betch-clean.log
date >>/data/betch-clean.log
你要执行的命令
fi
</pre>

===qcloud version 2022 ===
<pre>
详细请见最下面
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 ###
#前面这些全是检查func
check_user
check_alive

你运行的脚本的命令
ret=$?
if [ $ret -eq 0 ]
then
echo "xxxx run succ"
else
echo "xxxx run failed, errcode: $ret"
fi
exit $ret

#!/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@ ~]$ 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>

=reference=
[https://blog.csdn.net/sweeper_freedoman/article/details/103132999 Shell防止执行程序被多重启动]

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

[https://blog.csdn.net/yuki5233/article/details/83994843 Shell编程---监控检查进程是否存活]

[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）]

进程监控脚本并避免重复执行脚本 - 版本历史

Evan：​/* reference */

Evan：/* reference */