Add controller.dnsPolicy to the helm chart (#3136)

Author: wd

deployments/helm-chart/README.md

@@ -153,6 +153,7 @@ Parameter | Description | Default
 `controller.nginxplus` | Deploys the Ingress Controller for NGINX Plus. | false
 `controller.nginxReloadTimeout` | The timeout in milliseconds which the Ingress Controller will wait for a successful NGINX reload after a change or at the initial start. | 60000
 `controller.hostNetwork` | Enables the Ingress Controller pods to use the host's network namespace. | false
+`controller.dnsPolicy` | DNS policy for the Ingress Controller pods. | ClusterFirst
 `controller.nginxDebug` | Enables debugging for NGINX. Uses the `nginx-debug` binary. Requires `error-log-level: debug` in the ConfigMap via `controller.config.entries`. | false
 `controller.logLevel` | The log level of the Ingress Controller. | 1
 `controller.image.digest ` | The image digest of the Ingress Controller. | None

deployments/helm-chart/templates/controller-daemonset.yaml

@@ -68,6 +68,7 @@ spec:
       priorityClassName: {{ .Values.controller.priorityClassName }}
 {{- end }}
       hostNetwork: {{ .Values.controller.hostNetwork }}
+      dnsPolicy: {{ .Values.controller.dnsPolicy }}
       containers:
       - name: {{ include "nginx-ingress.name" . }}
         image: {{ include "nginx-ingress.image" . }}

deployments/helm-chart/templates/controller-deployment.yaml

@@ -73,6 +73,7 @@ spec:
       automountServiceAccountToken: true
       terminationGracePeriodSeconds: {{ .Values.controller.terminationGracePeriodSeconds }}
       hostNetwork: {{ .Values.controller.hostNetwork }}
+      dnsPolicy: {{ .Values.controller.dnsPolicy }}
       containers:
       - image: {{ include "nginx-ingress.image" . }}
         name: {{ include "nginx-ingress.name" . }}

deployments/helm-chart/values.yaml

@@ -35,6 +35,9 @@ controller:
   ## Enables the Ingress Controller pods to use the host's network namespace.
   hostNetwork: false
 
+  ## DNS policy for the Ingress Controller pods
+  dnsPolicy: ClusterFirst
+
   ## Enables debugging for NGINX. Uses the nginx-debug binary. Requires error-log-level: debug in the ConfigMap via `controller.config.entries`.
   nginxDebug: false