Fix the Loki config

nix-system-configs/modules/system/gramethus.nix

@@ -139,12 +139,71 @@ in {
 
     services.loki = {
       enable = true;
-
       configuration = {
         auth_enabled = false;
-        server.http_listen_port = 3100;
 
-        # etc.
+        server = {
+          http_listen_port = 3100;
+        };
+
+        ingester = {
+          lifecycler = {
+            address = "0.0.0.0";
+            ring = {
+              kvstore = {
+                store = "inmemory";
+              };
+              replication_factor = 1;
+            };
+            final_sleep = "0s";
+          };
+          chunk_idle_period = "1h";
+          max_chunk_age = "1h";
+          chunk_target_size = 1048576;
+          chunk_retain_period = "30s";
+          max_transfer_retries = 0;
+        };
+
+        schema_config = {
+          configs = [
+            {
+              from = "2020-10-24";
+              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 = "24h";
+            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";
+        };
       };
     };