nixpkgs/nixos/tests/containers-names.nix

import ./make-test-python.nix ({ pkgs, lib, ... }: {
  name = "containers-names";
  meta = {
    maintainers = with lib.maintainers; [ patryk27 ];
  };

  nodes.machine = { ... }: {
    # We're using the newest kernel, so that we can test containers with long names.
    # Please see https://github.com/NixOS/nixpkgs/issues/38509 for details.
    boot.kernelPackages = pkgs.linuxPackages_latest;

    containers = let
      container = subnet: {
        autoStart = true;
        privateNetwork = true;
        hostAddress = "192.168.${subnet}.1";
        localAddress = "192.168.${subnet}.2";
        config = { };
      };

     in {
      first = container "1";
      second = container "2";
      really-long-name = container "3";
      really-long-long-name-2 = container "4";
    };
  };

  testScript = ''
    machine.wait_for_unit("default.target")

    machine.succeed("ip link show | grep ve-first")
    machine.succeed("ip link show | grep ve-second")
    machine.succeed("ip link show | grep ve-really-lFYWO")
    machine.succeed("ip link show | grep ve-really-l3QgY")
  '';
})