feat(metrics): Add victorialogs

configuration/services/metrics/default.nix

@@ -5,5 +5,6 @@
     ./exporters.nix
     ./grafana.nix
     ./victoriametrics.nix
+    ./victorialogs.nix
   ];
 }

configuration/services/metrics/grafana.nix

@@ -1,4 +1,9 @@
-{ pkgs, config, ... }:
+{
+  pkgs,
+  config,
+  flake-inputs,
+  ...
+}:
 let
   domain = "metrics.${config.services.nginx.domain}";
 in
@@ -30,6 +35,7 @@ in
 
     declarativePlugins = [
       pkgs.grafanaPlugins.victoriametrics-metrics-datasource
+      flake-inputs.nixpkgs-unstable.legacyPackages.${pkgs.system}.grafanaPlugins.victoriametrics-logs-datasource
     ];
 
     provision = {
@@ -43,6 +49,13 @@ in
           access = "proxy";
           isDefault = true;
         }
+
+        {
+          name = "Victorialogs - tlater.net";
+          url = "http://${config.services.victorialogs.bindAddress}";
+          type = "victoriametrics-logs-datasource";
+          access = "proxy";
+        }
       ];
     };
   };

configuration/services/metrics/victorialogs.nix

@@ -0,0 +1,110 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.services.victorialogs;
+  pkg = pkgs.victoriametrics;
+  dirname = "victorialogs";
+in
+{
+  options.services.victorialogs =
+    let
+      inherit (lib.types) str;
+    in
+    {
+      listenAddress = lib.mkOption {
+        default = ":9428";
+        type = str;
+      };
+
+      bindAddress = lib.mkOption {
+        readOnly = true;
+        type = str;
+        description = ''
+          Final address on which victorialogs listens.
+        '';
+      };
+    };
+
+  config = {
+    services.victorialogs.bindAddress =
+      (lib.optionalString (lib.hasPrefix ":" cfg.listenAddress) "127.0.0.1") + cfg.listenAddress;
+
+    services.journald.upload = {
+      enable = true;
+      settings.Upload = {
+        URL = "http://${cfg.bindAddress}/insert/journald";
+        NetworkTimeoutSec = "20s";
+      };
+    };
+
+    systemd.services."systemd-journal-upload".after = [ "victorialogs.service" ];
+
+    systemd.services.victorialogs = {
+      description = "VictoriaLogs log database";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      startLimitBurst = 5;
+
+      serviceConfig = {
+        ExecStart = lib.escapeShellArgs [
+          "${pkg}/bin/victoria-logs"
+          "-storageDataPath=/var/lib/${dirname}"
+          "-httpListenAddr=${cfg.listenAddress}"
+        ];
+
+        DynamicUser = true;
+        RestartSec = 1;
+        Restart = "on-failure";
+        RuntimeDirectory = dirname;
+        RuntimeDirectoryMode = "0700";
+        StateDirectory = dirname;
+        StateDirectoryMode = "0700";
+
+        LimitNOFILE = 1048576;
+
+        # Hardening
+        DeviceAllow = [ "/dev/null rw" ];
+        DevicePolicy = "strict";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        PrivateTmp = true;
+        PrivateUsers = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectProc = "invisible";
+        ProtectSystem = "full";
+        RemoveIPC = true;
+        RestrictAddressFamilies = [
+          "AF_INET"
+          "AF_INET6"
+          "AF_UNIX"
+        ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = [
+          "@system-service"
+          "~@privileged"
+        ];
+      };
+
+      postStart = lib.mkBefore ''
+        until ${lib.getBin pkgs.curl}/bin/curl -s -o /dev/null http://${cfg.bindAddress}/ping; do
+          sleep 1;
+        done
+      '';
+    };
+  };
+}