add panopticon

Signed-off-by: gwg313 <gwg313@pm.me>

hosts/panopticon/loki.nix

@@ -0,0 +1,53 @@
+_: {
+  services.loki = {
+    enable = true;
+    configuration = {
+      auth_enabled = false;
+      server.http_listen_port = 3100;
+
+      ingester = {
+        lifecycler = {
+          ring = {
+            kvstore = {
+              store = "inmemory";
+            };
+          };
+          final_sleep = "0s";
+        };
+        chunk_idle_period = "5m";
+        max_chunk_age = "1h";
+        chunk_target_size = 1048576;
+      };
+
+      schema_config = {
+        configs = [
+          {
+            from = "2024-01-01";
+            store = "boltdb-shipper";
+            object_store = "filesystem";
+            schema = "v11";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }
+        ];
+      };
+
+      storage_config = {
+        boltdb_shipper = {
+          active_index_directory = "/var/lib/loki/index";
+          cache_location = "/var/lib/loki/cache";
+          shared_store = "filesystem";
+        };
+        filesystem = {
+          directory = "/var/lib/loki/chunks";
+        };
+      };
+
+      limits_config = {
+        retention_period = "168h";
+      };
+    };
+  };
+}