nixos/pgscv: init

  ./services/monitoring/opentelemetry-collector.nix

  ./services/monitoring/osquery.nix

  ./services/monitoring/parsedmarc.nix

  ./services/monitoring/pgscv.nix

  ./services/monitoring/prometheus/alertmanager-gotify-bridge.nix

  ./services/monitoring/prometheus/alertmanager-irc-relay.nix

  ./services/monitoring/prometheus/alertmanager-webhook-logger.nix

{

  config,

  lib,

  pkgs,

  utils,

  ...

}:

let

  inherit (lib)

    mkEnableOption

    mkIf

    mkOption

    mkPackageOption

    types

    ;

  cfg = config.services.pgscv;

  settingsFormat = pkgs.formats.yaml { };

  configFile = settingsFormat.generate "config.yaml" cfg.settings;

in

{

  options.services.pgscv = {

    enable = mkEnableOption "pgSCV, a PostgreSQL ecosystem metrics collector";

    package = mkPackageOption pkgs "pgscv" { };

    logLevel = mkOption {

      type = types.enum [

        "debug"

        "info"

        "warn"

        "error"

      ];

      default = "info";

      description = "Log level for pgSCV.";

    };

    settings = mkOption {

      type = settingsFormat.type;

      default = { };

      description = ''

        Configuration for pgSCV, in YAML format.

        See [configuration reference](https://github.com/cherts/pgscv/wiki/Configuration-settings-reference).

      '';

    };

  };

  config = mkIf cfg.enable {

    systemd.services.pgscv = {

      description = "pgSCV - PostgreSQL ecosystem metrics collector";

      wantedBy = [ "multi-user.target" ];

      requires = [ "network-online.target" ];

      after = [ "network-online.target" ];

      path = [ pkgs.glibc ]; # shells out to getconf

      serviceConfig = {

        User = "postgres";

        Group = "postgres";

        ExecStart = utils.escapeSystemdExecArgs [

          (lib.getExe cfg.package)

          "--log-level=${cfg.logLevel}"

          "--config-file=${configFile}"

        ];

        KillMode = "control-group";

        TimeoutSec = 5;

        Restart = "on-failure";

        RestartSec = 10;

        OOMScoreAdjust = 1000;

      };

    };

  };

}