fix(helm): add default wal dir to ruler config (#14920)

Signed-off-by: Krzysztof Łuczak <krzysztof.luczak.pro@gmail.com>

Author: thevops

docs/sources/setup/install/helm/reference.md

@@ -6247,7 +6247,11 @@ null
 			<td>object</td>
 			<td>Check https://grafana.com/docs/loki/latest/configuration/#ruler for more info on configuring ruler</td>
 			<td><pre lang="json">
-{}
+{
+  "wal": {
+    "dir": "/var/loki/ruler-wal"
+  }
+}
 </pre>
 </td>
 		</tr>

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,7 @@ Entries should include a reference to the pull request that introduced the chang
 
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
+- [BUGFIX] Add default wal dir to ruler config ([#14920](https://github.com/grafana/loki/pull/14920))
 ## 6.22.0
 
 ## 6.20.0

production/helm/loki/values.yaml

@@ -412,7 +412,9 @@ loki:
           prefix: index_
           period: 24h
   # -- Check https://grafana.com/docs/loki/latest/configuration/#ruler for more info on configuring ruler
-  rulerConfig: {}
+  rulerConfig:
+    wal:
+      dir: /var/loki/ruler-wal
   # -- Structured loki configuration, takes precedence over `loki.config`, `loki.schemaConfig`, `loki.storageConfig`
   structuredConfig: {}
   # -- Additional query scheduler config