multiple command in postStart hook of a container

Question

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

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"] 

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

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.

thanks

Answer 1

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 

Answer 2

You also can create a bash or make script to group all those commands.