From a6c7870120569c58c119ff126edb18077078740a Mon Sep 17 00:00:00 2001 From: Rob Vermaas Date: Thu, 5 May 2011 06:27:38 +0000 Subject: [PATCH] --- hydra-module.nix | 218 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 hydra-module.nix diff --git a/hydra-module.nix b/hydra-module.nix new file mode 100644 index 00000000..20482d5e --- /dev/null +++ b/hydra-module.nix @@ -0,0 +1,218 @@ +{ config, pkgs, ... }: + +with pkgs.lib; + +let + cfg = config.services.hydra; + + hydraConf = pkgs.writeScript "hydra.conf" + '' + using_frontend_proxy 1 + base_uri ${cfg.hydraURL} + notification_sender ${cfg.notificationSender} + max_servers 25 + ''; + + env = ''export NIX_REMOTE=daemon '' + + ''HYDRA_DBI="${cfg.dbi}" '' + + ''HYDRA_CONFIG=${cfg.baseDir}/data/hydra.conf '' + + ''HYDRA_DATA=${cfg.baseDir}/data '' + + ''HYDRA_TRACKER="${cfg.tracker}" ;''; + +in + +{ + ###### interface + options = { + services.hydra = rec { + + enable = mkOption { + default = false; + description = '' + Whether to run Hydra services. + ''; + }; + + baseDir = mkOption { + default = "/home/${user.default}"; + description = '' + The directory holding configuration, logs and temporary files. + ''; + }; + + user = mkOption { + default = "hydra"; + description = '' + The user the Hydra services should run as. + ''; + }; + + dbi = mkOption { + default = "dbi:Pg:dbname=hydra;host=localhost;user=root;"; + description = '' + The DBI string for Hydra database connection + ''; + }; + + hydra = mkOption { + default = pkgs.hydra; + description = '' + Location of hydra + ''; + }; + + hydraURL = mkOption { + default = "http://hydra.nixos.org"; + description = '' + The base URL for the Hydra webserver instance. Used for links in emails. + ''; + }; + + minimumDiskFree = mkOption { + default = 5; + description = '' + Threshold of minimum disk space (G) to determine if queue runner should run or not. + ''; + }; + + minimumDiskFreeEvaluator = mkOption { + default = 2; + description = '' + Threshold of minimum disk space (G) to determine if evaluator should run or not. + ''; + }; + + notificationSender = mkOption { + default = "e.dolstra@tudelft.nl"; + description = '' + Sender email address used for email notifications. + ''; + }; + + tracker = mkOption { + default = ""; + description = '' + Piece of HTML that is included on all pages. + ''; + }; + + autoStart = mkOption { + default = true; + description = '' + If hydra upstart jobs should start automatically. + ''; + }; + + }; + + }; + + + ###### implementation + + config = mkIf cfg.enable { + environment.systemPackages = [ cfg.hydra ]; + + users.extraUsers = [ + { name = cfg.user; + description = "Hydra"; + home = cfg.baseDir; + createHome = true; + useDefaultShell = true; + } + ]; + + # Should these 3 really be here? + nix.maxJobs = 0; + nix.distributedBuilds = true; + nix.manualNixMachines = true; + + nix.useChroot = true; + nix.nrBuildUsers = 100; + + nix.gc.automatic = true; + # $3 / $4 don't always work depending on length of device name + nix.gc.options = ''--max-freed "$((200 * 1024**3 - 1024 * $(df /nix/store | tail -n 1 | awk '{ print $3 }')))"''; + + nix.extraOptions = '' + gc-keep-outputs = true + gc-keep-derivations = true + + # The default (`true') slows Nix down a lot since the build farm + # has so many GC roots. + gc-check-reachability = false + + # Hydra needs caching of build failures. + build-cache-failure = true + + build-poll-interval = 10 + + use-sqlite-wal = false + ''; + + jobs.hydra_init = + { description = "hydra-init"; + startOn = "started network-interfaces"; + preStart = '' + mkdir -p ${cfg.baseDir}/data + chown ${cfg.user} ${cfg.baseDir}/data + ln -sf ${hydraConf} ${cfg.baseDir}/data/hydra.conf + ''; + exec = '' + echo done + ''; + }; + + jobs.hydra_server = + { description = "hydra-server"; + startOn = if cfg.autoStart then "started network-interfaces hydra-init" else "never"; + exec = '' + ${pkgs.su}/bin/su - ${cfg.user} -c '${env} ${cfg.hydra}/bin/hydra_server.pl > ${cfg.baseDir}/data/server.log 2>&1' + ''; + }; + + jobs.hydra_queue_runner = + { description = "hydra-queue-runner"; + startOn = if cfg.autoStart then "started network-interfaces hydra-init" else "never"; + preStart = "${pkgs.su}/bin/su - ${cfg.user} -c '${env} ${cfg.hydra}/bin/hydra_queue_runner.pl --unlock'"; + exec = '' + ${pkgs.su}/bin/su - ${cfg.user} -c '${env} nice -n 8 ${cfg.hydra}/bin/hydra_queue_runner.pl > ${cfg.baseDir}/data/queue_runner.log 2>&1' + ''; + }; + + jobs.hydra_evaluator = + { description = "hydra-evaluator"; + startOn = if cfg.autoStart then "started network-interfaces hydra-init" else "never"; + exec = '' + ${pkgs.su}/bin/su - ${cfg.user} -c '${env} nice -n 5 ${cfg.hydra}/bin/hydra_evaluator.pl > ${cfg.baseDir}/data/evaluator.log 2>&1' + ''; + }; + + services.cron.systemCronJobs = + let + # If there is less than ... GiB of free disk space, stop the queue + # to prevent builds from failing or aborting. + checkSpace = pkgs.writeScript "hydra-check-space" + '' + #! /bin/sh + if [ $(($(stat -f -c '%a' /nix/store) * $(stat -f -c '%S' /nix/store))) -lt $((${toString cfg.minimumDiskFree} * 1024**3)) ]; then + stop hydra-queue-runner + fi + if [ $(($(stat -f -c '%a' /nix/store) * $(stat -f -c '%S' /nix/store))) -lt $((${toString cfg.minimumDiskFreeEvaluator} * 1024**3)) ]; then + stop hydra-evaluator + fi + ''; + compressLogs = pkgs.writeScript "compress-logs" '' + #! /bin/sh -e + touch -d 'last month' r + find /nix/var/log/nix/drvs -type f -a ! -newer r -name '*.drv' | xargs bzip2 -v + ''; + in + [ "*/5 * * * * root ${checkSpace} &> ${cfg.baseDir}/data/checkspace.log" + "15 5 * * * root ${compressLogs} &> ${cfg.baseDir}/data/compress.log" + "15 02 * * * ${cfg.user} ${env} ${cfg.hydra}/bin/hydra_update_gc_roots.pl &> ${cfg.baseDir}/data/gc-roots.log" + ]; + + }; +} +