Loki helm: Add Ingress labels for Loki gateway helm chart (#9395)

Hello! I have small change suggestion. 
I think its too small to add documentation/changelog note, but if I
should then just say and I can add. :)

**What this PR does / why we need it**: it adds possibility to set
labels for Loki gateway Ingress.

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [x] Documentation added
- [ ] Tests updated
- [x] `CHANGELOG.md` updated
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/upgrading/_index.md`

docs/sources/installation/helm/reference.md

@@ -1114,6 +1114,15 @@ false
 			<td><pre lang="json">
 ""
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>gateway.ingress.labels</td>
+			<td>object</td>
+			<td>Labels for the gateway ingress</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,10 @@ 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.)
 
+## 5.6.0
+
+- [ENHANCEMENT] Add `gateway.ingress.labels` to values and ingress-gateway in helm chart.
+
 ## 5.5.12
 
 - [BUGFIX] Fix checksum annotation for config in single binary

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.8.2
-version: 5.5.12
+version: 5.6.0
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.5.12](https://img.shields.io/badge/Version-5.5.12-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
+![Version: 5.6.0](https://img.shields.io/badge/Version-5.6.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/gateway/ingress-gateway.yaml

@@ -10,6 +10,9 @@ metadata:
   namespace: {{ $.Release.Namespace }}
   labels:
     {{- include "loki.gatewayLabels" . | nindent 4 }}
+    {{- range $labelKey, $labelValue := .Values.gateway.ingress.labels }}
+    {{ $labelKey }}: {{ $labelValue | toYaml }}
+    {{- end }}
   {{- with .Values.gateway.ingress.annotations }}
   annotations:
     {{- toYaml . | nindent 4 }}

production/helm/loki/values.yaml

@@ -1254,6 +1254,8 @@ gateway:
     ingressClassName: ""
     # -- Annotations for the gateway ingress
     annotations: {}
+    # -- Labels for the gateway ingress
+    labels: {}
     # -- Hosts configuration for the gateway ingress
     hosts:
       - host: gateway.loki.example.com