容器的postStart挂钩中的多个命令 [英] multiple command in postStart hook of a container

问题描述

在kubernetes部署yaml文件中，是否有一种简单的方法可以在容器的postStart挂钩中运行多个命令?

in a kubernetes Deployment yaml file is there a simple way to run multiple commands in the postStart hook of a container?

我正在尝试做这样的事情:

I'm trying to do something like this:

lifecycle:
  postStart:
    exec:
      command: ["/bin/cp", "/webapps/myapp.war", "/apps/"]
      command: ["/bin/mkdir", "-p", "/conf/myapp"]
      command: ["touch", "/conf/myapp/ready.txt"]

但是它不起作用. (看起来只执行了最后一条命令)

But it doesn't work. (looks like only the last command is executed)

我知道我可以在容器映像中嵌入脚本并在其中调用它...但是我希望能够在yaml文件中自定义这些命令，而无需触及容器映像.

I know I could embed a script in the container image and simply call it there... But I would like to be able to customize those commands in the yaml file without touching the container image.

谢谢

推荐答案

只允许一个command，但是您可以像这样使用sh -c

Only one command allowed, but you can use sh -c like this

  lifecycle:
    postStart:
      exec:
        command:
          - "sh"
          - "-c"
          - >
            if [ -s /var/www/mybb/inc/config.php ]; then
            rm -rf /var/www/mybb/install;
            fi;
            if [ ! -f /var/www/mybb/index.php ]; then
            cp -rp /originroot/var/www/mybb/. /var/www/mybb/;
            fi

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