diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix index 3b67a857493..12077b4e4bf 100644 --- a/nixos/modules/module-list.nix +++ b/nixos/modules/module-list.nix @@ -537,6 +537,7 @@ ./services/monitoring/do-agent.nix ./services/monitoring/fusion-inventory.nix ./services/monitoring/grafana.nix + ./services/monitoring/grafana-image-renderer.nix ./services/monitoring/grafana-reporter.nix ./services/monitoring/graphite.nix ./services/monitoring/hdaps.nix diff --git a/nixos/modules/services/monitoring/grafana-image-renderer.nix b/nixos/modules/services/monitoring/grafana-image-renderer.nix new file mode 100644 index 00000000000..a010a5316ba --- /dev/null +++ b/nixos/modules/services/monitoring/grafana-image-renderer.nix @@ -0,0 +1,150 @@ +{ lib, pkgs, config, ... }: + +with lib; + +let + cfg = config.services.grafana-image-renderer; + + format = pkgs.formats.json { }; + + configFile = format.generate "grafana-image-renderer-config.json" cfg.settings; +in { + options.services.grafana-image-renderer = { + enable = mkEnableOption "grafana-image-renderer"; + + chromium = mkOption { + type = types.package; + description = '' + The chromium to use for image rendering. + ''; + }; + + verbose = mkEnableOption "verbosity for the service"; + + provisionGrafana = mkEnableOption "Grafana configuration for grafana-image-renderer"; + + settings = mkOption { + type = types.submodule { + freeformType = format.type; + + options = { + service = { + port = mkOption { + type = types.port; + default = 8081; + description = '' + The TCP port to use for the rendering server. + ''; + }; + logging.level = mkOption { + type = types.enum [ "error" "warning" "info" "debug" ]; + default = "info"; + description = '' + The log-level of the grafana-image-renderer.service-unit. + ''; + }; + }; + rendering = { + width = mkOption { + default = 1000; + type = types.ints.positive; + description = '' + Width of the PNG used to display the alerting graph. + ''; + }; + height = mkOption { + default = 500; + type = types.ints.positive; + description = '' + Height of the PNG used to display the alerting graph. + ''; + }; + mode = mkOption { + default = "default"; + type = types.enum [ "default" "reusable" "clustered" ]; + description = '' + Rendering mode of grafana-image-renderer: + + default: Creates on browser-instance + per rendering request. + reusable: One browser instance + will be started and reused for each rendering request. + clustered: allows to precisely + configure how many browser-instances are supposed to be used. The values + for that mode can be declared in rendering.clustering. + + + ''; + }; + args = mkOption { + type = types.listOf types.str; + default = [ "--no-sandbox" ]; + description = '' + List of CLI flags passed to chromium. + ''; + }; + }; + }; + }; + + default = {}; + + description = '' + Configuration attributes for grafana-image-renderer. + + See + for supported values. + ''; + }; + }; + + config = mkIf cfg.enable { + assertions = [ + { assertion = cfg.provisionGrafana -> config.services.grafana.enable; + message = '' + To provision a Grafana instance to use grafana-image-renderer, + `services.grafana.enable` must be set to `true`! + ''; + } + ]; + + services.grafana.extraOptions = mkIf cfg.provisionGrafana { + RENDERING_SERVER_URL = "http://localhost:${toString cfg.settings.service.port}/render"; + RENDERING_CALLBACK_URL = "http://localhost:${toString config.services.grafana.port}"; + }; + + services.grafana-image-renderer.chromium = mkDefault pkgs.chromium; + + services.grafana-image-renderer.settings = { + rendering = mapAttrs (const mkDefault) { + chromeBin = "${cfg.chromium}/bin/chromium"; + verboseLogging = cfg.verbose; + timezone = config.time.timeZone; + }; + + services = { + logging.level = mkIf cfg.verbose (mkDefault "debug"); + metrics.enabled = mkDefault false; + }; + }; + + systemd.services.grafana-image-renderer = { + wantedBy = [ "multi-user.target" ]; + after = [ "network.target" ]; + description = " A Grafana backend plugin that handles rendering of panels & dashboards to PNGs using headless browser (Chromium/Chrome)"; + + environment = { + PUPPETEER_SKIP_CHROMIUM_DOWNLOAD = "true"; + }; + + serviceConfig = { + DynamicUser = true; + PrivateTmp = true; + ExecStart = "${pkgs.grafana-image-renderer}/bin/grafana-image-renderer server --config=${configFile}"; + Restart = "always"; + }; + }; + }; + + meta.maintainers = with maintainers; [ ma27 ]; +}