fix(loki): update config for Loki 3.x compatibility (#292)

Loki config was written for 2.x and fails on 3.6.7 with:
- max_transfer_retries: removed in 3.0
- enforce_metric_name: removed in 3.0
- max_look_back_period: removed in 3.0

Updated to Loki 3.x config: tsdb store, v13 schema, common
block, compactor for retention. Volume path changed from
/opt/loki to /loki (3.x runs as non-root UID 10001).

Author: apham0001

compose-debug.yml

@@ -36,7 +36,7 @@ services:
     command: -config.file=/etc/loki/loki.yml
     volumes:
       - ./loki/loki.yml:/etc/loki/loki.yml
-      - ./data/loki:/opt/loki
+      - ./data/loki:/loki
     restart: unless-stopped
 
   charon:

compose-monitoring.yml

@@ -43,7 +43,7 @@ services:
     command: -config.file=/etc/loki/loki.yml
     volumes:
       - ./loki/loki.yml:/etc/loki/loki.yml
-      - ./data/loki:/opt/loki
+      - ./data/loki:/loki
     restart: unless-stopped
 
   alloy:

docker-compose.yml

@@ -220,7 +220,7 @@ services:
     command: -config.file=/etc/loki/loki.yml
     volumes:
       - ./loki/loki.yml:/etc/loki/loki.yml
-      - ./data/loki:/opt/loki
+      - ./data/loki:/loki
     restart: unless-stopped
 
   #             _ _     _       _                        _           _

loki/loki.yml

@@ -3,45 +3,39 @@ auth_enabled: false
 server:
   http_listen_port: 3100
 
-ingester:
-  lifecycler:
-    address: 127.0.0.1
-    ring:
-      kvstore:
-        store: inmemory
-      replication_factor: 1
-    final_sleep: 0s
-  wal:
-    enabled: false
-  chunk_idle_period: 5m
-  chunk_retain_period: 30s
-  max_transfer_retries: 0
+common:
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
 
 schema_config:
   configs:
-    - from: 2022-01-01
-      store: boltdb
+    - from: 2020-10-24
+      store: tsdb
       object_store: filesystem
-      schema: v11
+      schema: v13
       index:
         prefix: index_
-        period: 168h
-
-storage_config:
-  boltdb:
-    directory: /opt/loki/index
-
-  filesystem:
-    directory: /opt/loki/chunks
+        period: 24h
 
 limits_config:
-  enforce_metric_name: false
   reject_old_samples: true
   reject_old_samples_max_age: 168h
+  allow_structured_metadata: false
 
-chunk_store_config:
-  max_look_back_period: 0s
+ingester:
+  chunk_idle_period: 1h
+  max_chunk_age: 1h
+  chunk_retain_period: 30s
 
-table_manager:
-  retention_deletes_enabled: false
-  retention_period: 0s
+compactor:
+  working_directory: /loki/compactor
+  retention_enabled: true
+  retention_delete_delay: 2h
+  delete_request_store: filesystem