{ config, pkgs, lib, ... }: let cfg = config.services.victoriametrics; in { options.services.victoriametrics = with lib; { enable = mkEnableOption "VictoriaMetrics, a time series database, long-term remote storage for Prometheus"; package = mkPackageOption pkgs "victoriametrics" { }; listenAddress = mkOption { default = ":8428"; type = types.str; description = '' The listen address for the http interface. ''; }; retentionPeriod = mkOption { type = types.int; default = 1; description = '' Retention period in months. ''; }; extraOptions = mkOption { type = types.listOf types.str; default = []; description = '' Extra options to pass to VictoriaMetrics. See the README: or {command}`victoriametrics -help` for more information. ''; }; }; config = lib.mkIf cfg.enable { systemd.services.victoriametrics = { description = "VictoriaMetrics time series database"; after = [ "network.target" ]; startLimitBurst = 5; serviceConfig = { Restart = "on-failure"; RestartSec = 1; StateDirectory = "victoriametrics"; DynamicUser = true; ExecStart = '' ${cfg.package}/bin/victoria-metrics \ -storageDataPath=/var/lib/victoriametrics \ -httpListenAddr ${cfg.listenAddress} \ -retentionPeriod ${toString cfg.retentionPeriod} \ ${lib.escapeShellArgs cfg.extraOptions} ''; # victoriametrics 1.59 with ~7GB of data seems to eventually panic when merging files and then # begins restart-looping forever. Set LimitNOFILE= to a large number to work around this issue. # # panic: FATAL: unrecoverable error when merging small parts in the partition "/var/lib/victoriametrics/data/small/2021_08": # cannot open source part for merging: cannot open values file in stream mode: # cannot open file "/var/lib/victoriametrics/data/small/2021_08/[...]/values.bin": # open /var/lib/victoriametrics/data/small/2021_08/[...]/values.bin: too many open files LimitNOFILE = 1048576; }; wantedBy = [ "multi-user.target" ]; postStart = let bindAddr = (lib.optionalString (lib.hasPrefix ":" cfg.listenAddress) "127.0.0.1") + cfg.listenAddress; in lib.mkBefore '' until ${lib.getBin pkgs.curl}/bin/curl -s -o /dev/null http://${bindAddr}/ping; do sleep 1; done ''; }; }; }