forked from lix-project/hydra
Unify Hydra's NixOS module with the one used for hydra.nixos.org
In particular, the queue runner and web server now run under different UIDs.
This commit is contained in:
Eelco Dolstra
parent
3e0f5f664a
commit
dffb629b8a
124
hydra-module.nix
124
hydra-module.nix
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@ -3,6 +3,7 @@
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with lib;
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let
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cfg = config.services.hydra;
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baseDir = "/var/lib/hydra";
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@ -11,19 +12,25 @@ let
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hydraEnv =
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{ HYDRA_DBI = cfg.dbi;
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HYDRA_CONFIG = "${baseDir}/data/hydra.conf";
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HYDRA_DATA = "${baseDir}/data";
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HYDRA_CONFIG = "${baseDir}/hydra.conf";
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HYDRA_DATA = "${baseDir}";
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};
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env =
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{ NIX_REMOTE = "daemon";
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OPENSSL_X509_CERT_FILE = "/etc/ssl/certs/ca-bundle.crt";
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GIT_SSL_CAINFO = "/etc/ssl/certs/ca-bundle.crt";
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SSL_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt";
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PGPASSFILE = "${baseDir}/pgpass";
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} // hydraEnv // cfg.extraEnv;
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serverEnv = env //
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{ HYDRA_TRACKER = cfg.tracker;
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COLUMNS = "80";
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} // (optionalAttrs cfg.debugServer { DBIC_TRACE = 1; });
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localDB = "dbi:Pg:dbname=hydra;user=hydra;";
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haveLocalDB = cfg.dbi == localDB;
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in
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{
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@ -42,7 +49,7 @@ in
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dbi = mkOption {
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type = types.str;
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default = "dbi:Pg:dbname=hydra;user=hydra;";
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default = localDB;
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example = "dbi:Pg:dbname=hydra;host=postgres.example.org;user=foo;";
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description = ''
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The DBI string for Hydra database connection.
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@ -82,7 +89,7 @@ in
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minimumDiskFree = mkOption {
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type = types.int;
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default = 5;
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default = 0;
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description = ''
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Threshold of minimum disk space (GiB) to determine if queue runner should run or not.
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'';
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@ -90,7 +97,7 @@ in
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minimumDiskFreeEvaluator = mkOption {
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type = types.int;
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default = 2;
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default = 0;
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description = ''
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Threshold of minimum disk space (GiB) to determine if evaluator should run or not.
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'';
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@ -115,25 +122,25 @@ in
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type = types.nullOr types.path;
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default = null;
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description = ''
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File name of an alternate logo to be displayed on the web pages.
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Path to a file containing the logo of your Hydra instance.
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'';
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};
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debugServer = mkOption {
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type = types.bool;
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default = false;
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description = "Whether to run the server in debug mode";
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description = "Whether to run the server in debug mode.";
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};
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extraConfig = mkOption {
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type = types.lines;
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description = "Extra lines for the hydra config";
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description = "Extra lines for the Hydra configuration.";
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};
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extraEnv = mkOption {
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type = types.attrsOf types.str;
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default = {};
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description = "Extra environment variables for Hydra";
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description = "Extra environment variables for Hydra.";
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};
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};
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@ -144,6 +151,30 @@ in
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config = mkIf cfg.enable {
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users.extraGroups.hydra = { };
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users.extraUsers.hydra =
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{ description = "Hydra";
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group = "hydra";
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createHome = true;
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home = baseDir;
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useDefaultShell = true;
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};
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users.extraUsers.hydra-queue-runner =
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{ description = "Hydra queue runner";
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group = "hydra";
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useDefaultShell = true;
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};
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users.extraUsers.hydra-www =
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{ description = "Hydra web server";
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group = "hydra";
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useDefaultShell = true;
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};
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nix.trustedUsers = [ "hydra-queue-runner" ];
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services.hydra.package = mkDefault ((import ./release.nix {}).build.x86_64-linux);
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services.hydra.extraConfig =
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@ -161,13 +192,6 @@ in
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environment.variables = hydraEnv;
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users.extraUsers.hydra =
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{ description = "Hydra";
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home = baseDir;
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createHome = true;
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useDefaultShell = true;
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};
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nix.extraOptions = ''
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gc-keep-outputs = true
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gc-keep-derivations = true
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@ -177,18 +201,26 @@ in
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gc-check-reachability = false
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'';
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nix.trustedUsers = [ "hydra" ];
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systemd.services.hydra-init =
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{ wantedBy = [ "multi-user.target" ];
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requires = [ "postgresql.service" ];
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after = [ "postgresql.service" ];
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environment = env;
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preStart = ''
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mkdir -m 0700 -p ${baseDir}/data
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chown hydra ${baseDir}/data
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ln -sf ${hydraConf} ${baseDir}/data/hydra.conf
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${optionalString (cfg.dbi == "dbi:Pg:dbname=hydra;user=hydra;") ''
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mkdir -p ${baseDir}
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chown hydra.hydra ${baseDir}
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chmod 0750 ${baseDir}
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ln -sf ${hydraConf} ${baseDir}/hydra.conf
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mkdir -m 0700 -p /var/lib/hydra/www
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chown hydra-www.hydra /var/lib/hydra/www
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mkdir -m 0700 -p /var/lib/hydra/queue-runner
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mkdir -m 0750 -p /var/lib/hydra/build-logs
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chown hydra-queue-runner.hydra /var/lib/hydra/queue-runner /var/lib/hydra/build-logs
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${optionalString haveLocalDB ''
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if ! [ -e ${baseDir}/.db-created ]; then
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${config.services.postgresql.package}/bin/createuser hydra
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${config.services.postgresql.package}/bin/createdb -O hydra hydra
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@ -207,13 +239,14 @@ in
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{ wantedBy = [ "multi-user.target" ];
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requires = [ "hydra-init.service" ];
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after = [ "hydra-init.service" ];
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environment = serverEnv // { COLUMNS = "80"; };
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environment = serverEnv;
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serviceConfig =
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{ ExecStart =
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"@${cfg.package}/bin/hydra-server hydra-server -f -h '${cfg.listenHost}' "
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+ "-p ${toString cfg.port} --max_spare_servers 5 --max_servers 25 "
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+ "--max_requests 100 ${optionalString cfg.debugServer "-d"}";
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User = "hydra";
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User = "hydra-www";
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PermissionsStartOnly = true;
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Restart = "always";
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};
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};
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@ -225,9 +258,10 @@ in
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path = [ pkgs.nettools ];
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environment = env;
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serviceConfig =
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{ ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner";
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{ ExecStartPre = "${cfg.package}/bin/hydra-queue-runner --unlock";
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ExecStart = "@${cfg.package}/bin/hydra-queue-runner hydra-queue-runner";
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ExecStopPost = "${cfg.package}/bin/hydra-queue-runner --unlock";
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User = "hydra";
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User = "hydra-queue-runner";
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Restart = "always";
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};
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};
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@ -253,7 +287,7 @@ in
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{ ExecStart = "@${cfg.package}/bin/hydra-update-gc-roots hydra-update-gc-roots";
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User = "hydra";
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};
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startAt = "02:15";
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startAt = "2,14:15";
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};
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systemd.services.hydra-send-stats =
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@ -266,13 +300,11 @@ in
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};
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};
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services.cron.systemCronJobs =
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let
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# If there is less than ... GiB of free disk space, stop the queue
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# to prevent builds from failing or aborting.
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checkSpace = pkgs.writeScript "hydra-check-space"
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# If there is less than a certain amount of free disk space, stop
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# the queue/evaluator to prevent builds from failing or aborting.
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systemd.services.hydra-check-space =
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{ script =
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''
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#! ${pkgs.stdenv.shell}
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if [ $(($(stat -f -c '%a' /nix/store) * $(stat -f -c '%S' /nix/store))) -lt $((${toString cfg.minimumDiskFree} * 1024**3)) ]; then
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echo "stopping Hydra queue runner due to lack of free space..."
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systemctl stop hydra-queue-runner
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@ -282,8 +314,24 @@ in
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systemctl stop hydra-evaluator
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fi
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'';
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in
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[ "*/5 * * * * root ${checkSpace} &> ${baseDir}/data/checkspace.log"
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];
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startAt = "*:0/5";
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};
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services.postgresql.enable = mkIf haveLocalDB true;
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services.postgresql.identMap = optionalString haveLocalDB
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''
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hydra-users hydra hydra
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hydra-users hydra-queue-runner hydra
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hydra-users hydra-www hydra
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hydra-users root hydra
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'';
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services.postgresql.authentication = optionalString haveLocalDB
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''
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local hydra all ident map=hydra-users
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'';
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};
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}
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@ -1568,7 +1568,9 @@ void State::notificationSender()
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std::shared_ptr<PathLocks> State::acquireGlobalLock()
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{
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Path lockPath = hydraData + "/queue-runner";
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Path lockPath = hydraData + "/queue-runner/lock";
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createDirs(dirOf(lockPath));
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auto lock = std::make_shared<PathLocks>();
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if (!lock->lockPaths(PathSet({lockPath}), "", false)) return 0;
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@ -55,7 +55,7 @@ __PACKAGE__->config(
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},
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'Plugin::Session' => {
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expires => 3600 * 24 * 7,
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storage => ($ENV{'HYDRA_SERVER_DATA'} // Hydra::Model::DB::getHydraPath) . "/session_data",
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storage => Hydra::Model::DB::getHydraPath . "/www/session_data",
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unlink_on_exit => 0
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},
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'Plugin::AccessLog' => {
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