bundles/powerdns: also try to use node.hostname for dns generation

bundles/powerdns/metadata.py

@@ -1,4 +1,4 @@
-from ipaddress import ip_address, IPv4Address
+from ipaddress import ip_address, IPv4Address, IPv6Address
 
 from bundlewrap.metadata import atomic
 
@@ -159,6 +159,18 @@ def generate_dns_entries_for_nodes(metadata):
                     if not ip4 and isinstance(addr, IPv4Address):
                         ip4 = addr
 
+        if not ip4:
+            try:
+                ip4 = IPv4Address(rnode.hostname)
+            except ValueError:
+                pass
+
+        if not ip6:
+            try:
+                ip6 = IPv6Address(rnode.hostname)
+            except ValueError:
+                pass
+
         if ip4:
             results.add('{} IN A {}'.format(dns_name, ip4))