Change kubeadm config to run etcd by kubeadm.

roles/kubernetes/master/templates/kubeadm-config.v1alpha1.yaml.j2

@@ -1,4 +1,4 @@
-apiVersion: kubeadm.k8s.io/v1alpha1
+apiVersion: kubeadm.k8s.io/v1alpha2
 kind: MasterConfiguration
 api:
   advertiseAddress: {{ ip | default(ansible_default_ipv4.address) }}
@@ -7,13 +7,14 @@ api:
   controlPlaneEndpoint: {{ kubeadm_config_api_fqdn }}
 {% endif %}
 etcd:
-  endpoints:
+  external:
+      endpoints:
 {% for endpoint in etcd_access_addresses.split(',') %}
-  - {{ endpoint }}
+      - {{ endpoint }}
 {% endfor %}
-  caFile: {{ kube_config_dir }}/ssl/etcd/ca.pem
-  certFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}.pem
-  keyFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}-key.pem
+      caFile: {{ kube_config_dir }}/ssl/etcd/ca.pem
+      certFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}.pem
+      keyFile: {{ kube_config_dir }}/ssl/etcd/node-{{ inventory_hostname }}-key.pem
 networking:
   dnsDomain: {{ dns_domain }}
   serviceSubnet: {{ kube_service_addresses }}