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I ditched Docker for Podman

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Re: I ditched Docker for Podman

#11

Post by Tajnymag »

I've wanted to migrate multiple times. Unfortunately, it failed on multiple places.

Firstly, podman had a much worse performance compared to docker on my small cloud vps. Can't really go into details though.

Secondly, the development ecosystem isn't really fully there yet. Many tools utilizing Docker via its socket, fail to work reliably with podman. Either because the API differs or because of permission limitations. Sure, the tools could probably work around those limitations, but they haven't and podman isn't a direct 1:1 drop in replacement.

Re: I ditched Docker for Podman

#14

Post by xrd »

I love podman, and, like others have said here, it does not always work with every container.

I often try to run something using podman, then find strange errors, then switch back to docker. Typically this is with some large container, like gitlab, which probably relies on the entirety of the history of docker and its quirks. When I build something myself, most of the time I can get it working under podman.

This situation where any random container does not work has forced me to spin up a VM under incus and run certain troublesome containers inside that. This isn't optimal, but keeps my sanity. I know incus now permits running docker containers and I wonder if you can swap in podman as a replacement. If I could run both at the same time, that would be magical and solve a lot of problems.

There definitely is no consistency regarding GPU access in the podman and docker commands and that is frustrating.

But, all in all, I would say I do prefer podman over docker and this article is worth reading. Rootless is a big deal.

Re: I ditched Docker for Podman

#19

Post by stingraycharles »

raquuk wrote: post #5

The "podman generate systemd" command from the article is deprecated. The alternative are Podman Quadlets, which are similar to (docker-)compose.yaml, but defined in systemd unit files.

Which actually makes a lot of sense, to hand over the orchestration / composing to systemd, since it’s not client server API calls (like with docker) anymore but actual userland processes.
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