fix(helm): support global registry override for sidecar

Since grafana#19246 the sidecar image would
resolve to registry-mirror.example.com/docker.io/kiwigrid/k8s-sidecar
when a global registry mirror was defined.

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

Author: Scrumplex

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

@@ -12269,14 +12269,23 @@ false
 			<td><pre lang="json">
 "IfNotPresent"
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>sidecar.image.registry</td>
+			<td>string</td>
+			<td>The Docker registry for the k8s sidecar</td>
+			<td><pre lang="json">
+"docker.io"
+</pre>
 </td>
 		</tr>
 		<tr>
 			<td>sidecar.image.repository</td>
 			<td>string</td>
-			<td>The Docker registry and image for the k8s sidecar</td>
+			<td>Docker image repository for the k8s sidecar</td>
 			<td><pre lang="json">
-"docker.io/kiwigrid/k8s-sidecar"
+"kiwigrid/k8s-sidecar"
 </pre>
 </td>
 		</tr>

production/helm/loki/CHANGELOG.md

@@ -18,6 +18,7 @@ Entries should include a reference to the pull request that introduced the chang
 - [BUGFIX] Wrong context passed to loki.namespace helper from table manager servicemonitor. [#19461](https://github.com/grafana/loki/pull/19461)
 - [BUGFIX] Don't fail for missing bucket name, if local disk is used. [#19675](https://github.com/grafana/loki/pull/19675)
 - [FEATURE] Add load balancer port to query-frontend service. [#19462](https://github.com/grafana/loki/pull/19462)
+- [BUGFIX] Support global registry override for sidecar. [#19671](https://github.com/grafana/loki/pull/19671)
 
 ## 6.45.2
 

production/helm/loki/values.yaml

@@ -3997,8 +3997,10 @@ extraObjects: null
 
 sidecar:
   image:
-    # -- The Docker registry and image for the k8s sidecar
-    repository: docker.io/kiwigrid/k8s-sidecar
+    # -- The Docker registry for the k8s sidecar
+    registry: docker.io
+    # -- Docker image repository for the k8s sidecar
+    repository: kiwigrid/k8s-sidecar
     # -- Docker image tag
     tag: 1.30.10
     # -- Docker image sha. If empty, no sha will be used