I want to run some script inside the container when I execute the
docker stop ${ContainerName}
Is there any way of achieving that?
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1 Answer
That's a great question man.
First of all, docker stop sends a kind SIGTERM to the root process inside your container. And by default, your process has ten seconds before Docker send a no-mercy SIGKILL, killing it. [1]
Second, a robust application shouldn't corrupt data if the process was unexpectedly killed. For example, Nginx has well documented way to handle system signals. [2]
But in case your're making your onw application, and that might be even a Shell script, you'll need to implement your own signal handling. Just a few lines of code and you're done. Here's a nice tutorial. [3]
Have a nice day.