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nixos/hydra: add option for starman workers

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This is useful for small deployments which do not need 5 spare starman
workers taking 160 MB of RAM each.
This commit is contained in:
Sandro Jäckel 2024-02-26 00:46:41 +01:00
parent 5337ff6a80
commit 6cd7477733
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GPG Key ID: 3AF5A43A3EECC2E5
1 changed files with 31 additions and 3 deletions
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34
nixos/modules/services/continuous-integration/hydra/default.nix
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@ -178,6 +178,24 @@ in
description = lib.mdDoc "Whether to run the server in debug mode.";
};
maxServers = mkOption {
type = types.int;
default = 25;
description = lib.mdDoc "Maximum number of starman workers to spawn.";
};
minSpareServers = mkOption {
type = types.int;
default = 4;
description = lib.mdDoc "Minimum number of spare starman workers to keep.";
};
maxSpareServers = mkOption {
type = types.int;
default = 5;
description = lib.mdDoc "Maximum number of spare starman workers to keep.";
};
extraConfig = mkOption {
type = types.lines;
description = lib.mdDoc "Extra lines for the Hydra configuration.";
@ -224,6 +242,16 @@ in
###### implementation
config = mkIf cfg.enable {
assertions = [
{
assertion = cfg.maxServers != 0 && cfg.maxSpareServers != 0 && cfg.minSpareServers != 0;
message = "services.hydra.{minSpareServers,maxSpareServers,minSpareServers} cannot be 0";
}
{
assertion = cfg.minSpareServers < cfg.maxSpareServers;
message = "services.hydra.minSpareServers cannot be bigger than servives.hydra.maxSpareServers";
}
];
users.groups.hydra = {
gid = config.ids.gids.hydra;
@ -258,7 +286,7 @@ in
using_frontend_proxy = 1
base_uri = ${cfg.hydraURL}
notification_sender = ${cfg.notificationSender}
max_servers = 25
max_servers = ${toString cfg.maxServers}
${optionalString (cfg.logo != null) ''
hydra_logo = ${cfg.logo}
''}
@ -359,8 +387,8 @@ in
serviceConfig =
{ ExecStart =
"@${hydra-package}/bin/hydra-server hydra-server -f -h '${cfg.listenHost}' "
+ "-p ${toString cfg.port} --max_spare_servers 5 --max_servers 25 "
+ "--max_requests 100 ${optionalString cfg.debugServer "-d"}";
+ "-p ${toString cfg.port} --min_spare_servers ${toString cfg.minSpareServers} --max_spare_servers ${toString cfg.maxSpareServers} "
+ "--max_servers ${toString cfg.maxServers} --max_requests 100 ${optionalString cfg.debugServer "-d"}";
User = "hydra-www";
PermissionsStartOnly = true;
Restart = "always";