add log collector config

hosts/notice-me-senpai/grafana.nix

@@ -68,6 +68,79 @@ in
       };
 
     # log collector
+    loki = {
+      enable = true;
+      configuration = {
+        server.http_listen_port = 3100;
+        auth_enabled = false;
+
+        ingester = {
+          lifecycler = {
+            address = "127.0.0.1";
+            ring = {
+              kvstore = {
+                store = "inmemory";
+              };
+              replication_factor = 1;
+            };
+          };
+          chunk_idle_period = "1h";
+          max_chunk_age = "1h";
+          chunk_target_size = 1048576;
+          chunk_retain_period = "30s";
+          max_transfer_retries = 0;
+        };
+
+        schema_config = {
+          configs = [{
+            from = "2022-05-05";
+            store = "boltdb-shipper";
+            object_store = "filesystem";
+            schema = "v11";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }];
+        };
+
+        storage_config = {
+          boltdb_shipper = {
+            active_index_directory = "/var/lib/loki/boltdb-shipper-active";
+            cache_location = "/var/lib/loki/boltdb-shipper-cache";
+            cache_ttl = "48h";
+            shared_store = "filesystem";
+          };
+          filesystem = {
+            directory = "/var/lib/loki/chunks";
+          };
+        };
+
+        limits_config = {
+          reject_old_samples = true;
+          reject_old_samples_max_age = "168h";
+        };
+
+        chunk_store_config = {
+          max_look_back_period = "0s";
+        };
+
+        table_manager = {
+          retention_deletes_enabled = false;
+          retention_period = "0s";
+        };
+
+        compactor = {
+          working_directory = "/var/lib/loki";
+          shared_store = "filesystem";
+          compactor_ring = {
+            kvstore = {
+              store = "inmemory";
+            };
+          };
+        };
+      };
+    };
 
     # visualizer/alerting
     grafana = {