Alternative approach to systemd inside docker container

[Jamesits]

FYI, there is no need to use systemd to bring up the atlas service. It runs fine (at least in my environment) without any init system. By masking all systemctl calls I can build a ~40MiB (compressed) docker image.

https://github.com/Jamesits/docker-ripe-atlas/blob/2392fe6d9af218239b32916bade739f460c19cd0/Dockerfile#L22

Should've raised a pull request, but I'm not familiar with CentOS and yum...

[Knight1]

Thanks for the hint!
Has this any caveats?

Besides that, afaik is CentOS just starting the minimum required system services. But haven't looked into this. I would like an Alpine Linux approach :) Did you tried that?

[Jamesits]

One caveat is that you need to manually mount a tmpfs to /var/atlasdata otherwise atlas will complain.

Well why do everyone try to use Alpine? Alpine causes problems and is not that small compare to a properly packaged normal distro. Plus someone reported not being able to start atlas program on Alpine (not sure if their build process or Alpine caused the problem).