{ config, pkgs, lib, ... }: with lib; let cfg = config.services.vmalert; format = pkgs.formats.yaml {}; confOpts = concatStringsSep " \\\n" (mapAttrsToList mkLine (filterAttrs (_: v: v != false) cfg.settings)); confType = with types; let valueType = oneOf [ bool int path str ]; in attrsOf (either valueType (listOf valueType)); mkLine = key: value: if value == true then "-${key}" else if isList value then concatMapStringsSep " " (v: "-${key}=${escapeShellArg (toString v)}") value else "-${key}=${escapeShellArg (toString value)}" ; in { # interface options.services.vmalert = { enable = mkEnableOption (mdDoc "vmalert"); package = mkOption { type = types.package; default = pkgs.victoriametrics; defaultText = "pkgs.victoriametrics"; description = mdDoc '' The VictoriaMetrics derivation to use. ''; }; settings = mkOption { type = types.submodule { freeformType = confType; options = { "datasource.url" = mkOption { type = types.nonEmptyStr; example = "http://localhost:8428"; description = mdDoc '' Datasource compatible with Prometheus HTTP API. ''; }; "notifier.url" = mkOption { type = with types; listOf nonEmptyStr; default = []; example = [ "http://127.0.0.1:9093" ]; description = mdDoc '' Prometheus Alertmanager URL. List all Alertmanager URLs if it runs in the cluster mode to ensure high availability. ''; }; "rule" = mkOption { type = with types; listOf path; description = mdDoc '' Path to the files with alerting and/or recording rules. ::: {.note} Consider using the {option}`services.vmalert.rules` option as a convenient alternative for declaring rules directly in the `nix` language. ::: ''; }; }; }; default = { }; example = { "datasource.url" = "http://localhost:8428"; "datasource.disableKeepAlive" = true; "datasource.showURL" = false; "rule" = [ "http:///path/to/rules" "dir/*.yaml" ]; }; description = mdDoc '' `vmalert` configuration, passed via command line flags. Refer to for details on supported values. ''; }; rules = mkOption { type = format.type; default = {}; example = { group = [ { name = "TestGroup"; rules = [ { alert = "ExampleAlertAlwaysFiring"; expr = '' sum by(job) (up == 1) ''; } ]; } ]; }; description = mdDoc '' A list of the given alerting or recording rules against configured `"datasource.url"` compatible with Prometheus HTTP API for `vmalert` to execute. Refer to for details on supported values. ''; }; }; # implementation config = mkIf cfg.enable { environment.etc."vmalert/rules.yml".source = format.generate "rules.yml" cfg.rules; services.vmalert.settings.rule = [ "/etc/vmalert/rules.yml" ]; systemd.services.vmalert = { description = "vmalert service"; wantedBy = [ "multi-user.target" ]; after = [ "network.target" ]; reloadTriggers = [ config.environment.etc."vmalert/rules.yml".source ]; serviceConfig = { DynamicUser = true; Restart = "on-failure"; ExecStart = "${cfg.package}/bin/vmalert ${confOpts}"; ExecReload = ''${pkgs.coreutils}/bin/kill -SIGHUP "$MAINPID"''; }; }; }; }