nixos/applications/gitlab_runner.nix

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Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.skynet_gitlab_runner;
in {
imports = [
];
options.services.skynet_gitlab_runner = {
enable = mkEnableOption "Skynet Gitlab Runner";
runner = {
name = mkOption {
type = types.str;
};
gitlab = mkOption {
default = "https://gitlab.skynet.ie";
type = types.str;
};
description = mkOption {
default = cfg.runner.name;
type = types.str;
};
docker = {
image = mkOption {
default = "alpine:latest";
type = types.str;
};
cleanup_dates = mkOption {
# https://man.archlinux.org/man/systemd.time.7#CALENDAR_EVENTS
# it will use a lot of storage so clear it daily, may change to hourly if required
default = "daily";
type = types.str;
};
};
};
};
config = mkIf cfg.enable {
# https://search.nixos.org/options?from=0&size=50&sort=alpha_desc&type=packages&query=services.gitlab-runner.
environment.systemPackages = [
pkgs.gitlab-runner
];
age.secrets.runner_nix.file = ../secrets/gitlab/runners/runner01.age;
age.secrets.runner_general.file = ../secrets/gitlab/runners/runner01.age;
boot.kernel.sysctl."net.ipv4.ip_forward" = true; # 1
# taken from https://github.com/NixOS/nixpkgs/issues/245365#issuecomment-1663854128
virtualisation.docker.listenOptions = [ "/run/docker.sock" "127.0.0.1:2375" ];
services.gitlab-runner = {
enable = true;
clear-docker-cache = {
enable = true;
dates = cfg.runner.docker.cleanup_dates;
};
services = {
# might make a function later to have multiple runners, might never need it though
runner_nix = {
cloneUrl = cfg.runner.gitlab;
description = cfg.runner.description;
registrationFlags = [ "--docker-host" "tcp://127.0.0.1:2375" ];
registrationConfigFile = config.age.secrets.runner_nix.path;
dockerImage = cfg.runner.docker.image;
# from https://nixos.wiki/wiki/Gitlab_runner
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-daemon.sh
${pkgs.nix}/bin/nix-channel --add https://nixos.org/channels/nixos-23.05 nixpkgs # 3
${pkgs.nix}/bin/nix-channel --update nixpkgs
${pkgs.nix}/bin/nix-env -i ${concatStringsSep " " (with pkgs; [ nix cacert git openssh ])}
'';
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_general = {
cloneUrl = cfg.runner.gitlab;
description = cfg.runner.description;
registrationFlags = [ "--docker-host" "tcp://127.0.0.1:2375" ];
registrationConfigFile = config.age.secrets.runner_general.path;
dockerImage = cfg.runner.docker.image;
};
};
};
};
}