helm: add dnsConfig (#10339)

**What this PR does / why we need it**:

Adds dnsConfig value to Helm deployments and statefulsets

**Which issue(s) this PR fixes**:

N/A

**Special notes for your reviewer**:

**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
- [ ] If the change is worth mentioning in the release notes, add
`add-to-release-notes` label
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/setup/upgrade/_index.md`
- [x] For Helm chart changes bump the Helm chart version in
`production/helm/loki/Chart.yaml` and update
`production/helm/loki/CHANGELOG.md` and
`production/helm/loki/README.md`. [Example
PR](d10549e3ec)

---------

Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>

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

@@ -103,6 +103,15 @@ false
 			<td><pre lang="json">
 null
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>backend.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for backend pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -972,6 +981,15 @@ null
 			<td><pre lang="json">
 "RollingUpdate"
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>gateway.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for gateway pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -2328,6 +2346,15 @@ null
 			<td><pre lang="json">
 {}
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>monitoring.lokiCanary.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for canary pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -3067,6 +3094,15 @@ false
 			<td><pre lang="json">
 null
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>read.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for read pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -3418,6 +3454,15 @@ false
 			<td><pre lang="json">
 null
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>singleBinary.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for single binary pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -3670,6 +3715,15 @@ Hard node and soft zone anti-affinity
 			<td><pre lang="json">
 null
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>tableManager.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config table-manager pods</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>
@@ -4086,6 +4140,15 @@ false
 			<td><pre lang="json">
 null
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>write.dnsConfig</td>
+			<td>object</td>
+			<td>DNS config for write pods</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.)
 
+## 5.16.0
+
+- [ENHANCEMENT] Add dnsConfig to values
+
 ## 5.15.0
 
 - [ENHANCEMENT] Add rbac.pspAnnotations to define PSP annotations

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.8.4
-version: 5.15.0
+version: 5.16.0
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.15.0](https://img.shields.io/badge/Version-5.15.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.4](https://img.shields.io/badge/AppVersion-2.8.4-informational?style=flat-square)
+![Version: 5.16.0](https://img.shields.io/badge/Version-5.16.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.4](https://img.shields.io/badge/AppVersion-2.8.4-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/backend/statefulset-backend.yaml

@@ -132,6 +132,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.backend.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.backend.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

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

@@ -98,6 +98,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.gateway.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.gateway.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/loki-canary/daemonset.yaml

@@ -95,6 +95,10 @@ spec:
           resources:
             {{- toYaml . | nindent 12 }}
           {{- end }}
+      {{- with .dnsConfig }}
+      dnsConfig:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
       {{- with .nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/read/deployment-read.yaml

@@ -117,6 +117,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.read.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.read.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/read/statefulset-read.yaml

@@ -123,6 +123,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.read.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.read.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/single-binary/statefulset.yaml

@@ -135,6 +135,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.singleBinary.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.singleBinary.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/table-manager/deployment-table-manager.yaml

@@ -92,6 +92,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.tableManager.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.tableManager.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/templates/write/statefulset-write.yaml

@@ -139,6 +139,10 @@ spec:
       affinity:
         {{- tpl . $ | nindent 8 }}
       {{- end }}
+      {{- with .Values.write.dnsConfig }}
+      dnsConfig:
+        {{- tpl . $ | nindent 8 }}
+      {{- end }}
       {{- with .Values.write.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

production/helm/loki/values.yaml

@@ -659,6 +659,8 @@ monitoring:
     extraEnvFrom: []
     # -- Resource requests and limits for the canary
     resources: {}
+    # -- DNS config for canary pods
+    dnsConfig: {}
     # -- Node selector for canary pods
     nodeSelector: {}
     # -- Tolerations for canary pods
@@ -768,6 +770,8 @@ write:
             matchLabels:
               {{- include "loki.writeSelectorLabels" . | nindent 10 }}
           topologyKey: kubernetes.io/hostname
+  # -- DNS config for write pods
+  dnsConfig: {}
   # -- Node selector for write pods
   nodeSelector: {}
   # -- Tolerations for write pods
@@ -842,6 +846,8 @@ tableManager:
               matchLabels:
                 {{- include "loki.tableManagerSelectorLabels" . | nindent 12 }}
             topologyKey: failure-domain.beta.kubernetes.io/zone
+  # -- DNS config table-manager pods
+  dnsConfig: {}
   # -- Node selector for table-manager pods
   nodeSelector: {}
   # -- Tolerations for table-manager pods
@@ -929,6 +935,8 @@ read:
             matchLabels:
               {{- include "loki.readSelectorLabels" . | nindent 10 }}
           topologyKey: kubernetes.io/hostname
+  # -- DNS config for read pods
+  dnsConfig: {}
   # -- Node selector for read pods
   nodeSelector: {}
   # -- Tolerations for read pods
@@ -1025,6 +1033,8 @@ backend:
             matchLabels:
               {{- include "loki.backendSelectorLabels" . | nindent 10 }}
           topologyKey: kubernetes.io/hostname
+  # -- DNS config for backend pods
+  dnsConfig: {}
   # -- Node selector for backend pods
   nodeSelector: {}
   # -- Tolerations for backend pods
@@ -1105,6 +1115,8 @@ singleBinary:
             matchLabels:
               {{- include "loki.singleBinarySelectorLabels" . | nindent 10 }}
           topologyKey: kubernetes.io/hostname
+  # -- DNS config for single binary pods
+  dnsConfig: {}
   # -- Node selector for single binary pods
   nodeSelector: {}
   # -- Tolerations for single binary pods
@@ -1267,6 +1279,8 @@ gateway:
             matchLabels:
               {{- include "loki.gatewaySelectorLabels" . | nindent 10 }}
           topologyKey: kubernetes.io/hostname
+  # -- DNS config for gateway pods
+  dnsConfig: {}
   # -- Node selector for gateway pods
   nodeSelector: {}
   # -- Tolerations for gateway pods