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this post was submitted on 10 Jun 2023
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Related to this: can podman completely replace Docker? I.e., can it pull containers and build containers in addition to running them?
It can pull and build containers fine but last time I tried there were some differences. Mounts were not usable because user uid/gid behave quite differently. Tools like portainer dont work on podman containers. I havent tried out any networking or advanced stuff yet.
But i found that the considerations to write docker files are quite different for podman.
Differences you find could be related to containers being run rootless, or the host system having SELinux enforcesd. Both problems could be intended behavior and can be soled simply by using by adding correct labels to mount points like :z or :Z. This SELinux feature also affects Docker when setup.
Portaiers tries to connect to a docker sock path that is not the same with Podman. While podman is rootless and does not need a daemon, socks and stuff, it has support for them nevertheless. So you can simply adjust Portainer config to work with podman. I havnt tried it yet but I managed to do similar things for other software.
Podman supports dockerfile, right?
Yes.
Unlike docker, podman doesn't try to do everything on it's own. There's a separate tool known as
buildahwhich builds containers from dockerfiles just fine.Ps. More generally, they're called containerfiles.
I believe it can but don't take my word for it