feat(helm): support templated loki.operational_config (#17045)

Signed-off-by: Dmitry Ponomaryov <me@halje.ru>
Signed-off-by: Dmitry Ponomaryov <iamhalje@gmail.com>
Co-authored-by: J Stickler <julie.stickler@grafana.com>

Author: iamhalje

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

@@ -6301,6 +6301,15 @@ null
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>loki.operational_config</td>
+			<td>object</td>
+			<td>Optional operational configuration</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<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.)
 
+- [FEATURE] Add support for templated `loki.operational_config` [#17045](https://github.com/grafana/loki/pull/17045)
 - [ENHANCEMENT] Allow specifying additional labels for memcached statefulsets volume claim templates [#15554](https://github.com/grafana/loki/pull/15554)
 - [BUGFIX] Gateway Ingester endpoints points to inexistent service when zone aware replication are enabled [#17362](https://github.com/grafana/loki/pull/17362)
 - [BUGFIX] add missing flush=true to preStop hook [#16063](https://github.com/grafana/loki/pull/16063)

production/helm/loki/values.yaml

@@ -331,6 +331,11 @@ loki:
     bloom_gateway:
       {{- tpl (. | toYaml) $ | nindent 4 }}
     {{- end }}
+
+    {{- with .Values.loki.operational_config }}
+    operational_config:
+      {{- tpl (. | toYaml) $ | nindent 4 }}
+    {{- end }}
   # Should authentication be enabled
   auth_enabled: true
   # -- memberlist configuration (overrides embedded default)
@@ -541,6 +546,8 @@ loki:
     enabled: false
     client:
       addresses: '{{ include "loki.bloomGatewayAddresses" . }}'
+  # -- Optional operational configuration
+  operational_config: {}
 ######################################################################################################################
 #
 # Enterprise Loki Configs