115 lines
3 KiB
Nix
115 lines
3 KiB
Nix
{
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lib,
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config,
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pkgs,
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self,
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...
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}:
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with lib; let
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bootstrap = pkgs.writeScript "bootstrap.sh" ''
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#!/usr/bin/env bash
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set -e
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apt update
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apt install --yes curl git sudo xz-utils
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adduser --system --uid 999 build
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chown build /nix
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sudo -u build curl -L https://nixos.org/nix/install > install
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sudo -u build sh install
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echo "export PATH=/nix/var/nix/profiles/per-user/build/profile/bin:''$PATH" >> /etc/profile
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mkdir /etc/nix
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echo 'experimental-features = nix-command flakes' >> /etc/nix/nix.conf
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export nix_user_config_file="/home/build/.local/share/nix/trusted-settings.json"
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mkdir -p $(dirname \\$nix_user_config_file)
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echo '{"extra-experimental-features":{"nix-command flakes":true}}' > \\$nix_user_config_file
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chown -R build /home/build/
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curl -L https://github.com/drone-runners/drone-runner-exec/releases/latest/download/drone_runner_exec_linux_amd64.tar.gz | tar xz
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sudo install -t /usr/local/bin drone-runner-exec
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if [ ! -f /run/vars ]; then
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exit 1
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fi
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cp -a /run/vars /run/runtime-vars
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env | grep "DRONE" >> /run/runtime-vars
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su - -s /bin/bash build sh -c "/usr/local/bin/drone-runner-exec daemon /run/runtime-vars"
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'';
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psCfg = config.pub-solar;
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cfg = config.pub-solar.docker-ci-runner;
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in {
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options.pub-solar.docker-ci-runner = {
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enable = lib.mkEnableOption "Enables a docker container running a drone exec runner as unprivileged user.";
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enableKvm = lib.mkOption {
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description = ''
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Enable kvm support.
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'';
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default = true;
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type = types.bool;
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};
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nixCacheLocation = lib.mkOption {
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description = ''
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Location of nix cache that is shared between builds
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'';
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default = "/var/lib/docker-ci-runner";
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type = types.path;
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};
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runnerEnvironment = lib.mkOption {
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description = ''
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Additional environment vars added to the vars file on container runtime
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'';
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default = {};
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};
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runnerVarsFile = lib.mkOption {
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description = ''
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Location of vars file passed to drone runner
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'';
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type = types.path;
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};
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};
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config = lib.mkIf cfg.enable {
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virtualisation = {
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docker = {
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enable = true; # sadly podman is not supported rightnow
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};
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oci-containers = {
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backend = "docker";
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containers."drone-exec-runner" = {
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image = "debian";
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autoStart = true;
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entrypoint = "bash";
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cmd = ["/bootstrap.sh"];
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volumes = [
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"${cfg.runnerVarsFile}:/run/vars"
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"${cfg.nixCacheLocation}:/nix"
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"${bootstrap}:/bootstrap.sh"
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];
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environment = cfg.runnerEnvironment;
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extraOptions = lib.mkIf cfg.enableKvm ["--device=/dev/kvm"];
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};
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};
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};
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# Fix container not stopping correctly and holding the system 120s upon
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# shutdown / reboot
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systemd.services.docker-drone-exec-runner.preStop = ''
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docker stop drone-exec-runner
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'';
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};
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}
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