参考

1、shell脚本start、stop、restart_爱学习 爱分享博客-CSDN博客

2、echo 拼接字符串：https://www.csdn.net/tags/OtTacg1sMTc5MS1ibG9n.html

三、字符串判空：

shell判断字符串空的方法-linux运维-PHP中文网

1、学一下while read line

这个命令对于批量关闭某些过程的遍历非常有用

[root@lhy-05 prometheus]# docker ps | awk '{print $1}' CONTAINER 44b52fb4239d 6c167d8bf4e0 5ab159dab98c [root@lhy-05 prometheus]# 

找到操作容器并输出容器id

str="-test" docker ps | awk '{print $1}' | while read pid do tmp=${pid}${str} echo ${tmp} done

[root@lhy-05 prometheus]# sh test.sh  CONTAINER-test 44b52fb4239d-test 6c167d8bf4e0-test 5ab159dab98c-test [root@lhy-05 prometheus]# 

2.学会找出某个过程是否存在

查看Prometheus是否存在启动容器

[root@lhy-05 prometheus]# cat test.sh  container_id=`docker ps | grep prometheus |  awk '{print $1}'` if [ -n "${container_id}" ];then   echo ${container_id} else   echo "prometheus进程不存在" fi

3、stop|start|restart

需求：写个shell只允许脚本输入start，stop和restart参数，实现Prometheus docker启动、停止和重启容器的功能

[root@lhy-05 prometheus]# cat run.sh  #!/bin/bash start(){  docker start prometheus }   stop(){    container_id=`docker ps | grep prometheus | awk '{print $1}'`  if [ -z "${container_id}" ];then     echo "dockerprometheus is not running"  else     docker stop ${container_id}  fi }   case "$1" in   start)   start   ;;   stop)   stop   ;;     restart)   stop   start   ;;   *)   echo 'Only param {start|stop|restart} is supported' exit 1   ;;   esac