podman: drop slirp4netns which has been replaced by passt

[SuperSandro2000]

see https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.20.0#podman_5.x

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[dawidd6]

slirp4netns function argument should be removed too, as it is not used anywhere anymore.

[dawidd6]

Not a maintainer of this package but lgtm

[SebTM]

Hey, currently it's possible due to it's still included to switch back through:

virtualisation.containers.containersConf.settings.network.default_rootless_network_cmd = "slirp4netns";

e.g. if you are experiencing issue with the switch as I did initially - so I would ask if it's viable to make it optional and/or add an option/check the option when building the config to include it?

[SuperSandro2000]

@SebTM can you check the latest commit?

[SebTM]

Result of nixpkgs-review pr 313670 run on x86_64-linux 1

2 packages blacklisted:

• nixos-install-tools
• tests.nixos-functions.nixos-test

5 packages built:

• apx
• apx-gui
• out-of-tree
• podman
• podman.man

[SebTM]

LGTM ✌🏻 (tested locally on top of unstable)

[SebTM]

@SuperSandro2000 you agree?

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/4543

[stratdev3]

Recently upgrade to nixos 24.11, anormal amount of bugs for a major release... And so bug with podman.

virtualisation.containers.containersConf.settings.network.default_rootless_network_cmd = "slirp4netns";

This is not working.

podman run --rm --name test --net=slirp4netns -it kroniak/ssh-client /bin/bash
Error: could not find slirp4netns, the network namespace can't be configured: exec: "slirp4netns": executable file not found in $PATH

To retrieve slirp4netns i have to add it to environment.systemPackages and then it's ok.

At last, i use slirp4netns only to connect to host from container.
I found a better way to do this in nixos 24.11 (podman v5.2.3) waiting for the podman v5.3 to be in the stable nixos repository

podman run --rm --name test -it --network pasta:--map-guest-addr,169.254.1.2 --add-host host.containers.internal:169.254.1.2 kroniak/ssh-client /bin/bash

• use the default pasta network but with a new parameter map-guest-addr which point to ip 169.254.1.2 (will be the default ip in v5.3)
• add host to map the famous host.containers.internal to ip.

Once inside the container, the host is reachable with host.containers.internal like it was in podman 4.x