defiant: add uptime-kuma, rename metrics->monitoring

hosts/defiant/services/monitoring/loki.nix

@@ -0,0 +1,78 @@
+{ config, pkgs, ... }:
+let
+  cfg = config.services.loki;
+  saveDirectory = "/tank/services/metrics/loki";
+in {
+  services.loki = {
+    enable = true;
+    dataDir = saveDirectory;
+    configuration = {
+      auth_enabled = false;
+      server = {
+        http_listen_port = 3100;
+        http_listen_address = "0.0.0.0";
+        grpc_listen_port = 9096;
+      };
+
+      ingester = {
+        wal = {
+          enabled = true;
+          dir = "${saveDirectory}/wal";
+        };
+        lifecycler = {
+          address = "127.0.0.1";
+          ring = {
+            kvstore = {
+              store = "inmemory";
+            };
+            replication_factor = 1;
+          };
+          final_sleep = "0s";
+        };
+        chunk_idle_period = "1h";
+      };
+
+      schema_config = {
+        configs = [
+          {
+            from = "2022-12-01";
+            store = "boltdb-shipper";
+            object_store = "filesystem";
+            schema = "v11";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }
+        ];
+      };
+
+      storage_config = {
+        boltdb_shipper = {
+          active_index_directory = "${saveDirectory}/boltdb-shipper-index";
+          cache_location = "${saveDirectory}/boltdb-shipper-cache";
+          shared_store = "filesystem";
+          cache_ttl = "24h";
+        };
+        filesystem = {
+          directory = "${saveDirectory}/chunks";
+        };
+      };
+
+      limits_config = {
+        enforce_metric_name = false;
+        reject_old_samples = true;
+        reject_old_samples_max_age = "72h";
+      };
+
+      compactor = {
+        working_directory = "${saveDirectory}/compactor";
+        shared_store = "filesystem";
+      };
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [
+    cfg.configuration.server.http_listen_port
+  ];
+}