change the way of getting etcd_member_name

roles/kubespray-defaults/defaults/main.yaml

@@ -338,13 +338,13 @@ etcd_events_access_addresses: |-
 # user should set etcd_member_name in inventory/mycluster/hosts.ini
 etcd_member_name: |-
   {% for host in groups['etcd'] %}
-  {%   if inventory_hostname == host %}{{ hostvars[host].etcd_member_name }}{% endif %}
+  {%   if inventory_hostname == host %}{{ hostvars[host].etcd_member_name | default("etcd" + loop.index|string) }}{% endif %}
   {% endfor %}
 etcd_peer_addresses: |-
   {% for item in groups['etcd'] -%}
-    {{ hostvars[item].etcd_member_name }}=https://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2380{% if not loop.last %},{% endif %}
+    {{ hostvars[item].etcd_member_name | default("etcd" + loop.index|string) }}=https://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2380{% if not loop.last %},{% endif %}
   {%- endfor %}
 etcd_events_peer_addresses: |-
   {% for item in groups['etcd'] -%}
-    {{ hostvars[item].etcd_member_name }}-events=https://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2382{% if not loop.last %},{% endif %}
+    {{ hostvars[item].etcd_member_name | default("etcd" + loop.index|string) }}-events=https://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2382{% if not loop.last %},{% endif %}
   {%- endfor %}