fix

tasks/resolve.yaml

@@ -8,9 +8,15 @@
       # nameserver {{ br.address | regex_replace("/\d+$", "") }}
       {% endif %}
       {% endfor %}
+      {% if smartdns.external is defined and smartdns.external %}
+      {% for dns in smartdns.external %}
+      nameserver {{ dns }}
+      {% endfor %}
+      {% else %}
       {% for dns in smartdns.china_dns %}
       nameserver {{dns}}
       {% endfor %}
+      {% endif %}
 
     dest: /etc/resolv.conf
 #- name: read docker daemon