cherry-picked from: https://review.openstack.org/#/c/592336/2
- pods with host network can not reach coredns or any svc or resolve their own hostname
- If webhooks are deployed in the cluster, the apiserver needs to contact them, which means kube-proxy is required in the master node with the cluster-cidr set.
Change-Id: Icb8e7c3b8c75a3ab087c818c8580c0c8a9111d30 story: 2003460 task: 24719
Conflicts: magnum/drivers/common/templates/kubernetes/fragments/configure-kubernetes-master.sh magnum/drivers/common/templates/kubernetes/fragments/enable-services-master.sh