Trapping signals in Docker containers

Have you ever stopped a Docker container?

There are essentially two commands: `docker stop` and `docker kill` that can be used to stop it. Behind the scenes, `docker stop` stops a running container by sending it SIGTERM signal, let the main process process it, and after a grace period uses SIGKILL to terminate the application.

Running applications in Docker, you could use signals to communicate with an application from the host machine, reload configuration, do some cleanup on program termination or coordinate more than one executable.

Let’s see the way signals can be used in the Docker environment.


Signals in Docker



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