--- /usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py	2017-06-28 06:55:03.000000000 +0800
+++ sysconfig.py	2017-07-22 12:19:20.924882813 +0800
@@ -204,6 +204,7 @@
 
     @classmethod
     def _render_iface_shared(cls, iface, iface_cfg):
+        print("XXA:", iface, iface_cfg)
         for k, v in cls.iface_defaults:
             iface_cfg[k] = v
 
@@ -212,6 +213,28 @@
             if old_value is not None:
                 iface_cfg[new_key] = old_value
 
+        if 'subnets' in iface:
+            for subnet in iface['subnets']:
+                if 'dns_search' in subnet:
+                    search_str = ""
+                    for i, k in enumerate(subnet['dns_search']):
+                        if i > 3:
+                            break
+                        if i > 0:
+                            search_str = search_str + " "
+                        search_str = search_str + k
+                    iface_cfg['SEARCH'] = search_str
+
+                if 'dns_nameservers' in subnet:
+                    ns_str = ""
+                    for i, k in enumerate(subnet['dns_nameservers']):
+                        if i == 3:
+                            break
+                        iface_cfg['DNS'+str(i+1)] = k
+        
+                if 'gateway' in subnet:
+                    iface_cfg['GATEWAY'] = subnet['gateway']
+        
     @classmethod
     def _render_subnet(cls, iface_cfg, route_cfg, subnet):
         subnet_type = subnet.get('type')