Explicitly defines the --kubelet-preferred-address-types parameter

to the API server configuration.

This solves the problem where if you have non-resolvable node names,
and try to scale the server by adding new nodes, kubectl commands
start to fail for newly added nodes, giving a TCP timeout error when
trying to resolve the node hostname against a public DNS.

roles/kubernetes/master/templates/manifests/kube-apiserver.manifest.j2

@@ -36,6 +36,7 @@ spec:
     - --admission-control={{ kube_apiserver_admission_control | join(',') }}
     - --service-cluster-ip-range={{ kube_service_addresses }}
     - --service-node-port-range={{ kube_apiserver_node_port_range }}
+    - --kubelet-preferred-address-types=InternalDNS,InternalIP,Hostname,ExternalDNS,ExternalIP
     - --client-ca-file={{ kube_cert_dir }}/ca.pem
 {% if kube_basic_auth|default(true) %}
     - --basic-auth-file={{ kube_users_dir }}/known_users.csv