note/4.shell/3.看门狗脚本.md

# 看门狗脚本

## 已注册service程序看门狗

配置简单,但不够灵活

- 脚本程序

  ```shell
  #!/bin/sh
  
  while [ 1 ]
  do
  	while read line
  	do
  		if [ -n "$line" ] && [ ${line:0:1} != "#" ]
  		then
  			pm=$(service $line status)
  
  			if [[ ${pm} =~ 'Not running' ]]
  			then
  				echo "service $line start"
  				service $line start
  			fi
  
  		fi
  
  	done < /home/work/mengyxu/watchdog/service.cfg
  
  	sleep 10
  
  done
  ```

- 配置文件
  ```txt
  #monitor
  whims
  location
  ```

## 可执行jar程序看门狗

可配置启动参数

- 脚本程序

  ```shell
  #!/bin/sh
  
  while [ 1 ]
  do
          while read line
          do
                  if [ -n "$line" ] && [ ${line:0:1} != "#" ]
                  then
                          path=${line%/*}
                          pro=${line%% *}
                          par=${line#*.jar}
                          pm=$(ps -ef | grep java)
  
                          if [[ !($pm =~ $pro) ]]
                          then
                                  cd $path
                                  nohup java -server $par -jar $pro > /dev/null 2>&1 &
                                  echo "start $pro"
                          fi
  
                  fi
  
          done < /home/work/mengyxu/watchdog/jar.cfg
  
          sleep 10
  
  done
  
  
  ```
  
  
  
- 配置文件

  ```txt
  #/home/work/mengyxu/monitor/monitor.jar
  /home/work/mengyxu/whims/whims.jar -Xms32m -Xmx128m
  /home/work/mengyxu/location/location.jar -Xms32m -Xmx64m
  ```

## 开机启动看门狗脚本

```shell
vim /etc/profile
```

在文件末尾添加

```tex
nohup /home/work/mengyxu/watchdog/jarWatch.sh > /dev/null 2>&1 &
```