telemetry: added loki

system/services/default.nix

@@ -1,6 +1,8 @@
 { ... }:
 {
   imports = [
+    ./telemetry
+
     ./caddy.nix
     ./cockpit.nix
     ./forgejo.nix
@@ -15,6 +17,5 @@
     ./syncthing.nix
     ./wireguard.nix
     ./photoprism.nix
-    ./telemetry.nix
   ];
 }

system/services/telemetry/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  imports = [
+    ./grafana.nix
+    ./loki.nix
+  ];
+}

system/services/telemetry/grafana.nix

@@ -1,6 +1,6 @@
 { config, lib, pkgs, ... }:
 let
-  cfg = config.profile.services.telemetry;
+  cfg = config.profile.services.telemetry.grafana;
   inherit (lib) mkIf;
   grafanaDomain = "grafana.tigor.web.id";
 in
@@ -8,20 +8,23 @@ in
   config = mkIf cfg.enable {
     sops.secrets =
       let
-        opts = { sopsFile = ../../secrets/telemetry.yaml; owner = "grafana"; };
+        opts = {
+          sopsFile = ../../../secrets/telemetry.yaml;
+          owner = "grafana";
+        };
       in
-      mkIf cfg.grafana.enable {
+      {
         "grafana/admin_user" = opts;
         "grafana/admin_password" = opts;
         "grafana/admin_email" = opts;
         "grafana/secret_key" = opts;
       };
 
-    services.caddy.virtualHosts.${grafanaDomain}.extraConfig = mkIf cfg.grafana.enable ''
+    services.caddy.virtualHosts.${grafanaDomain}.extraConfig = ''
       reverse_proxy ${config.services.grafana.settings.server.http_addr}:${toString config.services.grafana.settings.server.http_port}
     '';
 
-    services.grafana = mkIf cfg.grafana.enable {
+    services.grafana = {
       enable = true;
       package = pkgs.grafana;
       settings = {

system/services/telemetry/loki.nix

@@ -0,0 +1,68 @@
+{ config, lib, ... }:
+let
+  cfg = config.profile.services.telemetry.loki;
+  inherit (lib) mkIf;
+in
+{
+  config = mkIf cfg.enable {
+    services.loki =
+      let
+        dataDir = config.services.loki.dataDir;
+      in
+      {
+        enable = true;
+        configuration = {
+          # https://grafana.com/docs/loki/latest/configure/examples/configuration-examples/
+          auth_enabled = false; # Loki will not be exposed to the public internet
+          server = {
+            http_listen_address = "0.0.0.0";
+            http_listen_port = 3100;
+            grpc_listen_port = 9095;
+          };
+
+          common = {
+            path_prefix = dataDir;
+            replication_factor = 1;
+            ring = {
+              instance_addr = "127.0.0.1";
+              kvstore.store = "inmemory";
+            };
+          };
+
+          schema_config = {
+            configs = [
+              {
+                from = "2024-08-29";
+                store = "tsdb";
+                object_store = "filesystem";
+                schema = "v13";
+                index = {
+                  prefix = "index_";
+                  period = "24h";
+                };
+              }
+            ];
+          };
+
+          storage_config = {
+            filesystem = {
+              directory = "${dataDir}/chunks";
+            };
+          };
+        };
+      };
+    # https://grafana.com/docs/grafana/latest/datasources/loki/
+    services.grafana.provision.datasources.settings.datasources = [
+      {
+        name = "Loki";
+        type = "loki";
+        access = "proxy";
+        url = "http://${config.services.loki.configuration.server.http_listen_address}:${toString config.services.loki.configuration.server.http_listen_port}";
+        jsonData = {
+          timeout = 60;
+          maxLines = 1000;
+        };
+      }
+    ];
+  };
+}