Merge pull request 'loki: add best practices' (#89) from develop into master

Reviewed-on: #89

modules/nixos/loki/default.nix

@@ -3,7 +3,12 @@
     enable = true;
     configuration = {
       auth_enabled = false;
-      server.http_listen_port = 3100;
+
+      server = {
+        http_listen_address = "0.0.0.0";
+        http_listen_port = 3100;
+        grpc_listen_port = 9096;
+      };
 
       common = {
         ring = {
@@ -14,10 +19,32 @@
         path_prefix = "/var/lib/loki";
       };
 
+      ingester = {
+        wal = {
+          enabled = true;
+          dir = "/var/lib/loki/wal";
+        };
+        chunk_encoding = "snappy";
+        chunk_idle_period = "30m";
+        max_chunk_age = "2h";
+        chunk_target_size = 1572864;
+        chunk_block_size = 262144;
+      };
+
+      limits_config = {
+        reject_old_samples = true;
+        reject_old_samples_max_age = "168h";
+        ingestion_rate_mb = 10;
+        ingestion_burst_size_mb = 20;
+        per_stream_rate_limit = "3MB";
+        per_stream_rate_limit_burst = "15MB";
+        max_line_size = "256KB";
+      };
+
       schema_config = {
         configs = [
           {
-            from = "2020-10-24";
+            from = "2026-01-01";
             store = "tsdb";
             object_store = "filesystem";
             schema = "v13";
@@ -34,6 +61,15 @@
           directory = "/var/lib/loki/chunks";
         };
       };
+
+      compactor = {
+        working_directory = "/var/lib/loki/compactor";
+        compaction_interval = "10m";
+        retention_enabled = true;
+        retention_delete_delay = "2h";
+        retention_delete_worker_count = 150;
+        delete_request_store = "filesystem";
+      };
     };
   };
 
@@ -71,4 +107,6 @@
       ];
     };
   };
+
+  networking.firewall.allowedTCPPorts = [ 3100 ];
 }