2023-02-16

Last updated Feb 23, 2023 Edit Source

• Journal

Because I can’t make a statically linked binary, I will stick with an alpine container for now. Post on stackoverflow: https://stackoverflow.com/questions/75459376/statically-link-devmapper-when-using-cgo

About ENTRYPOINT vs CMD in a Dockerfile/Containerfile:

The shell form prevents any CMD or run command line arguments from being used, but has the disadvantage that your ENTRYPOINT will be started as a subcommand of /bin/sh -c, which does not pass signals. This means that the executable will not be the container’s PID 1 - and will not receive Unix signals - so your executable will not receive a SIGTERM from docker stop <container>. -> https://docs.docker.com/engine/reference/builder/#entrypoint

I’m starting to write the basic for spawning a container, listing them etc. I use labels to store a container info.

I’m also getting to know podman’s pod, which I think would become handy for grouping containers of only one project (e.g. apache + php + mysql): https://www.cloudreach.com/en/technical-blog/containerize-this-how-to-use-php-apache-mysql-within-docker-containers/. I originally wanted to have one container per project, but that require to build a containerfile that launch (in this case) 3 containers. It doesn’t scale well, takes time, and the commendation for containers is to have a single process as PID 1, to handle graceful shutdown.