Do we need Signal handling for containers?

[ArneTR]

Docker introduced a feature a bit ago that actually does not set the ENTRYPOINT process as PID 1, but an actual classic init process.

Thea advantage of this is that actual signals can be sent to the container.

ATM we do not use this feature really, but it might be the case that container providers are expecting this, because their containers need for instance a graceful shutdown with SIGTERM.

Having this here for backlog. If you need this feature, please comment and upvote!

Source: https://stackoverflow.com/questions/43122080/how-to-use-init-parameter-in-docker-run

[ArneTR]

A place where we actually used this internally is in our own host system containers. gunicorn was running through a bash entrypoint script and thus was always 10 seconds to shut down.

#605