services.gitlab-runner.services

attribute set of (submodule)

{ }

{
  # runner for building in docker via host's nix-daemon
  # nix store will be readable in runner, might be insecure
  nix = {
    # File should contain at least these two variables:
    # - `CI_SERVER_URL`
    # - `REGISTRATION_TOKEN`
    #
    # NOTE: Support for runner registration tokens will be removed in GitLab 18.0.
    # Please migrate to runner authentication tokens soon. For reference, the example
    # runners below this one are configured with authentication tokens instead.
    registrationConfigFile = "/run/secrets/gitlab-runner-registration";

    dockerImage = "alpine";
    dockerVolumes = [
      "/nix/store:/nix/store:ro"
      "/nix/var/nix/db:/nix/var/nix/db:ro"
      "/nix/var/nix/daemon-socket:/nix/var/nix/daemon-socket:ro"
    ];
    dockerDisableCache = true;
    preBuildScript = pkgs.writeScript "setup-container" ''
      mkdir -p -m 0755 /nix/var/log/nix/drvs
      mkdir -p -m 0755 /nix/var/nix/gcroots
      mkdir -p -m 0755 /nix/var/nix/profiles
      mkdir -p -m 0755 /nix/var/nix/temproots
      mkdir -p -m 0755 /nix/var/nix/userpool
      mkdir -p -m 1777 /nix/var/nix/gcroots/per-user
      mkdir -p -m 1777 /nix/var/nix/profiles/per-user
      mkdir -p -m 0755 /nix/var/nix/profiles/per-user/root
      mkdir -p -m 0700 "$HOME/.nix-defexpr"

      . ${pkgs.nix}/etc/profile.d/nix.sh

      ${pkgs.nix}/bin/nix-env -i ${concatStringsSep " " (with pkgs; [ nix cacert git openssh ])}

      ${pkgs.nix}/bin/nix-channel --add https://nixos.org/channels/nixpkgs-unstable
      ${pkgs.nix}/bin/nix-channel --update nixpkgs
    '';
    environmentVariables = {
      ENV = "/etc/profile";
      USER = "root";
      NIX_REMOTE = "daemon";
      PATH = "/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/default/sbin:/bin:/sbin:/usr/bin:/usr/sbin";
      NIX_SSL_CERT_FILE = "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt";
    };
    tagList = [ "nix" ];
  };
  # runner for building docker images
  docker-images = {
    # File should contain at least these two variables:
    # `CI_SERVER_URL`
    # `CI_SERVER_TOKEN`
    authenticationTokenConfigFile = "/run/secrets/gitlab-runner-docker-images-token-env";

    dockerImage = "docker:stable";
    dockerVolumes = [
      "/var/run/docker.sock:/var/run/docker.sock"
    ];
    tagList = [ "docker-images" ];
  };
  # runner for executing stuff on host system (very insecure!)
  # make sure to add required packages (including git!)
  # to `environment.systemPackages`
  shell = {
    # File should contain at least these two variables:
    # `CI_SERVER_URL`
    # `CI_SERVER_TOKEN`
    authenticationTokenConfigFile = "/run/secrets/gitlab-runner-shell-token-env";

    executor = "shell";
    tagList = [ "shell" ];
  };
  # runner for everything else
  default = {
    # File should contain at least these two variables:
    # `CI_SERVER_URL`
    # `CI_SERVER_TOKEN`
    authenticationTokenConfigFile = "/run/secrets/gitlab-runner-default-token-env";
    dockerImage = "debian:stable";
  };
}