Bug 1880902 - If the endpoint publishing strategy type is set to host…

… network then

we should automatically set the dnsPolicy with ClusterFirstWithHostNet.

pkg/operator/controller/ingress/deployment.go

@@ -386,6 +386,7 @@ func desiredRouterDeployment(ci *operatorv1.IngressController, ingressController
 		// problems or firewall restrictions.
 		deployment.Spec.Template.Spec.Containers[0].LivenessProbe.Handler.HTTPGet.Host = "localhost"
 		deployment.Spec.Template.Spec.Containers[0].ReadinessProbe.Handler.HTTPGet.Host = "localhost"
+		deployment.Spec.Template.Spec.DNSPolicy = "ClusterFirstWithHostNet"
 	}
 
 	// Fill in the default certificate secret name.
@@ -1007,6 +1008,7 @@ func deploymentConfigChanged(current, expected *appsv1.Deployment) (bool, *appsv
 	updated.Spec.Template.Spec.Containers = containers
 	updated.Spec.Template.Labels = expected.Spec.Template.Labels
 	updated.Spec.Strategy = expected.Spec.Strategy
+	updated.Spec.Template.Spec.DNSPolicy = expected.Spec.Template.Spec.DNSPolicy
 	volumes := make([]corev1.Volume, len(expected.Spec.Template.Spec.Volumes))
 	for i, vol := range expected.Spec.Template.Spec.Volumes {
 		volumes[i] = *vol.DeepCopy()