shell 看门狗

应用是通过nohup java -jar xx.jar &
难免遇到unkown error 挂掉，所以有必要编写看门狗 保护一下
#!/bin/bash
now=date ‘+%Y-%m-%d %H:%M:%S’`

grepFlag=’datawarehouseLoader.jar’
thisLog=’/loader/watchDogLog.log’

baseDir=”/loader/”
sleepTime=60

if [ ! -f “$baseDir/datawarehouseLoader.jar” ]; then echo “$baseDir/datawarehouseLoader.jar file missing,check again" >> "$thisLog”
exit
fi

user=”root”
if [ “$user” != “root” ]; then
echo “this tool must run as root”
exit
fi

while [ 0 -eq 0 ]
do
now=date '+%Y-%m-%d %H:%M:%S'
ret=ps -ef | grep "$grepFlag" | grep -v grep | wc -l
if [ $ret -eq 0 ]; then cd$baseDir
echo “$now process not exists,restart process now... " >> "$thisLog”
nohup java -jar datawarehouseLoader.jar &
echo “$now restart done ..... " >> "$thisLog”
cd $curDir else echo “$now process exists,sleep $sleepTime seconds ” >> “$thisLog”
sleep $sleepTime
fi
done
`
臭不要脸的参考自：使用bash shell脚本编写简易的看门狗watch dog – https://www.chenyudong.com/archives/bash-shell-watch-dog-auto-restart-process.html

（编辑：李大同）

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