进程监控脚本并避免重复执行脚本

mysql进程监控脚本shell

#!/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."