Merge pull request #763 from bogdando/resolver_fallback

Fallback to default resolver if no nameservers

roles/kubernetes/preinstall/tasks/set_resolv_facts.yml

@@ -70,7 +70,7 @@
       {%- if skip_dnsmasq|bool and not dns_early|bool -%}
         {{ [ skydns_server ] + upstream_dns_servers|default([]) }}
       {%- elif dns_early|bool -%}
-        {{ upstream_dns_servers|default([default_resolver]) }}
+        {{ upstream_dns_servers|default([]) }}
       {%- else -%}
         {{ [ dns_server ] }}
       {%- endif -%}
@@ -78,6 +78,6 @@
 - name: generate nameservers to resolvconf
   set_fact:
     nameserverentries:
-      nameserver {{( dnsmasq_server + nameservers|default([])) | join(',nameserver ')}}
+      nameserver {{( dnsmasq_server + nameservers|default([default_resolver])) | join(',nameserver ')}}
     supersede_nameserver:
-      supersede domain-name-servers {{( dnsmasq_server + nameservers|default([])) | join(', ') }};
+      supersede domain-name-servers {{( dnsmasq_server + nameservers|default([default_resolver])) | join(', ') }};