NixOS Podman LogDriver issues

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1

Hello. This issue has some overlap with this topic.

When the log driver is set to journald, podman logs produces no output.

This is my Podman configuration:

virtualisation.containers.enable = true;

virtualisation.containers.containersConf.settings = {
  containers.log_driver = "k8s-file";
};

virtualisation.podman = {
  enable = true;
  extraPackages = with pkgs; [ podman-compose ];
  defaultNetwork.settings.dns_enabled = true;
};

As a workaround, I configure the log driver to k8s-file, which restores expected behavior for podman logs.

To reproduce the issue, I ran:

podman run --replace -d --name logger --log-driver journald docker.io/library/busybox \
  sh -c 'while true; do echo tick; sleep 1; done'

Running podman logs logger produces no output, even though the logs are visible via journalctl --user -f.

2

Same happens in my setup.

I can access the logs via journalctl --user CONTAINER_NAME=<container_name> but not via podman logs <container_name>.

3

I have same issue, after joining systemd-journal group, fixed it

4

This fix doesn’t work for me (I logged out and then in to make sure the group membership applied)

5

It seems like the commit podman: use `systemdMinimal` · NixOS/nixpkgs@d060dee · GitHub broke podman logs. I have changed virtualisation.podman.package = pkgs.podman.override { systemdMinimal = pkgs.systemd; }; and the logs started showing again.

6

Going to investigate this asap

2 Likes
7

I tried locally and it seems that it works.

Do you have the issue on NixOS? or on another OS (where podman would be available through Nix)?

8

It’s on NixOS. I saw that testcontainers couldn’t get logs which are used to check if a database is started. It’s configured dotfiles-nix/nixos/work/configuration.nix at 723f3bed1c217e2310f5924e6f4a79e55b846d20 · adomixaszvers/dotfiles-nix · GitHub and dotfiles-nix/nixos/pi/configuration.nix at 723f3bed1c217e2310f5924e6f4a79e55b846d20 · adomixaszvers/dotfiles-nix · GitHub and I do run podman in rootless mode with my users.

9

Thanks @adomixaszvers !
@drupol I saw you were the author of the commit, I created an issue to track this regression here fyi!

10

Hello,

It has been fixed in https://github.com/NixOS/nixpkgs/pull/471084 already!

Going to close the issue.