feat: allow to redefine dnsPolicy

charts/coredns/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: coredns
-version: 1.45.1
+version: 1.45.2
 appVersion: 1.13.1
 home: https://coredns.io
 icon: https://coredns.io/images/CoreDNS_Colour_Horizontal.png
@@ -20,8 +20,4 @@ type: application
 annotations:
   artifacthub.io/changes: |
     - kind: added
-      description: Support for customAnnotations on ClusterRole and ClusterRoleBinding
-    - kind: added
-      description: Support for dnsConfig in deployment
-    - kind: added
-      description: Support for podLabels
+      description: Add configurable dnsPolicy for deployment

charts/coredns/README.md

@@ -211,6 +211,8 @@ The command removes all the Kubernetes components associated with the chart and
 | `deployment.name`                              | Name of the deployment if `deployment.enabled` is true. Otherwise the name of an existing deployment for the autoscaler or HPA to target. | `""`                                                         |
 | `deployment.annotations`                       | Annotations to add to the main deployment                                                                                                 | `{}`                                                         |
 | `deployment.selector`                          | Pod selector                                                                                                                              | `{}`                                                         |
+| `deployment.dnsPolicy`                         | DNS policy for the pod (Default, ClusterFirst, ClusterFirstWithHostNet, None)                                                             | `"Default"`                                                  |
+| `deployment.dnsConfig`                         | Custom DNS configuration (nameservers, searches, options). Required when dnsPolicy is "None"                                              | `{}`                                                         |
 | `clusterRole.nameOverride`                     | ClusterRole name override                                                                                                                 |                                                              |
 
 See `values.yaml` for configuration notes. Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,

charts/coredns/templates/deployment.yaml

@@ -75,13 +75,15 @@ spec:
       {{- if .Values.priorityClassName }}
       priorityClassName: {{ .Values.priorityClassName | quote }}
       {{- end }}
-      {{- if .Values.dnsConfig }}
-      dnsPolicy: None
-      {{- else if .Values.isClusterService }}
-      dnsPolicy: Default
+      {{- if .Values.isClusterService }}
+      dnsPolicy: {{ .Values.deployment.dnsPolicy }}
+      {{- end }}
+      {{- if and (eq .Values.deployment.dnsPolicy "None") (not .Values.deployment.dnsConfig) }}
+      {{- fail "dnsConfig is required when dnsPolicy is set to None" }}
       {{- end }}
-      {{- if .Values.dnsConfig }}
-      dnsConfig: {{ toYaml .Values.dnsConfig | nindent 8 }}
+      {{- with .Values.deployment.dnsConfig }}
+      dnsConfig:
+        {{- toYaml . | nindent 8 }}
       {{- end }}
       {{- if .Values.affinity }}
       affinity:

charts/coredns/values.yaml

@@ -405,6 +405,23 @@ deployment:
   annotations: {}
   ## Pod selector
   selector: {}
+  # dnsPolicy determines how DNS resolution is handled for the pod.
+  # When isClusterService is true, this defaults to "Default" to avoid circular DNS resolution.
+  # Options: Default, ClusterFirst, ClusterFirstWithHostNet, None
+  # If set to "None", you must provide dnsConfig.
+  dnsPolicy: "Default"
+  # dnsConfig allows fine-grained DNS configuration for the pod.
+  # Only used when dnsPolicy is set to "None" or when custom DNS settings are needed.
+  # Example:
+  #   dnsConfig:
+  #     nameservers:
+  #       - 8.8.8.8
+  #     searches:
+  #       - my.dns.search.suffix
+  #     options:
+  #       - name: ndots
+  #         value: "2"
+  dnsConfig: {}
 
 # Configures initcontainers for the coredns deployment.
 initContainers: []