feat: allow setting dnsConfig (#4265)

* feat: allow setting dnsConfig

* update docs

* fix docs

* Update charts/external-dns/templates/deployment.yaml

Co-authored-by: Steve Hipwell <steve.hipwell@gmail.com>

---------

Co-authored-by: Steve Hipwell <steve.hipwell@gmail.com>

charts/external-dns/CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [UNRELEASED]
 
+- Added support for dnsConfig. ([#4265](https://github.com/kubernetes-sigs/external-dns/pull/4265)) [@davhdavh](https://github.com/davhdavh)
+
 ## [v1.14.3] - 2023-01-26
 
 ### Fixed

charts/external-dns/README.md

@@ -83,6 +83,7 @@ If `namespaced` is set to `true`, please ensure that `sources` my only contains
 | commonLabels | object | `{}` | Labels to add to all chart resources. |
 | deploymentAnnotations | object | `{}` | Annotations to add to the `Deployment`. |
 | deploymentStrategy | object | `{"type":"Recreate"}` | [Deployment Strategy](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy). |
+| dnsConfig | object | `nil` | [DNS config](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-dns-config) for the pod, if not set the default will be used. |
 | dnsPolicy | string | `nil` | [DNS policy](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy) for the pod, if not set the default will be used. |
 | domainFilters | list | `[]` |  |
 | env | list | `[]` | [Environment variables](https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/) for the `external-dns` container. |

charts/external-dns/templates/deployment.yaml

@@ -61,6 +61,10 @@ spec:
       {{- with .Values.dnsPolicy }}
       dnsPolicy: {{ . }}
       {{- end }}
+      {{- with .Values.dnsConfig }}
+      dnsConfig:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
       {{- with .Values.initContainers }}
       initContainers:
         {{- toYaml . | nindent 8 }}

charts/external-dns/values.yaml

@@ -89,6 +89,9 @@ terminationGracePeriodSeconds:
 # -- (string) [DNS policy](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy) for the pod, if not set the default will be used.
 dnsPolicy:
 
+# -- (object) [DNS config](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-dns-config) for the pod, if not set the default will be used.
+dnsConfig:
+
 # -- [Init containers](https://kubernetes.io/docs/concepts/workloads/pods/init-containers/) to add to the `Pod` definition.
 initContainers: []