this post was submitted on 07 Sep 2023
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Programming

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Podman is a daemon-less alternative to Docker, but with Rootless containers, grouping containers in pods, and systemd integration. What do you think of it? (lemmy.ml)
submitted 1 year ago by [email protected] to c/programming
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Podman is a lot like Docker: a tool for running OCI containers. While it maintains backwards compatibility with Dockerfile and docker-compose syntax, it offers a lot of other benefits:

  • daemonless: it can run containers without a daemon process running in the background.
  • Rootless: can run containers without root privileges
  • pods: can group containers into secluded pods, which share resources and network namespace

Podman has other features I haven't explored yet, like compatibility with Kubernetes yaml file, and being able to run containers as systemd units.

Have you used podman before? What are your thoughts on it?

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[–] [email protected] 2 points 1 year ago (2 children)

We are trying to use podman as a way to run Testcontainers and build images on a kubernetes cluster using Gitlab CI. Building works, but running Testcontainers doesn't so far :(

[–] [email protected] 2 points 1 year ago (1 children)

Have you looked into kaniko?

[–] [email protected] 1 points 1 year ago (1 children)

Yes but imo it's easier and nicer to integrate Podman into an existing build, for example with maven

[–] [email protected] 1 points 1 year ago (1 children)

You typically don't use podman to build images and you would instead use something like buildah.

[–] [email protected] 1 points 1 year ago (1 children)

Doesn't podman use buildah under the hood?

[–] [email protected] 2 points 1 year ago

Somewhat, but just a few pieces of it. Podman build is mainly a way to be backwards compatible with the docker cli. Buildah has some more flexibility and the way it builds the images are slightly different. You can use podman to build, but it's probably better to move to buildah for the build step as time permits.