bundles/bind: add node-dns-auto-generator

bundles/bind/metadata.py

@@ -31,3 +31,42 @@ def port_checks(metadata):
             },
         },
     }
+
+@metadata_reactor
+def generate_dns_entries_for_nodes(metadata):
+    results = set()
+
+    for rnode in repo.nodes:
+        node_name_split = rnode.name.split('.')
+        node_name_split.reverse()
+        dns_name = '.'.join(node_name_split)
+        ip4 = None
+        ip6 = None
+
+        # We only need this for GCE, because machines over there don't
+        # have a public ipv4 address.
+        if rnode.metadata.get('external_ipv4', None):
+            ip4 = rnode.metadata.get('external_ipv4')
+
+        for iface, config in sorted(rnode.metadata.get('interfaces', {}).items()):
+            if not ip4 and 'ipv4' in config:
+                ip4 = sorted(config['ipv4'])[0]
+
+            if not ip6 and 'ipv6' in config:
+                ip6 = sorted(config['ipv6'])[0]
+
+        if ip4:
+            results.add('{} IN A {}'.format(dns_name, ip4))
+
+        if ip6:
+            results.add('{} IN AAAA {}'.format(dns_name, ip6))
+
+    return {
+        'bind': {
+            'zones_primary': {
+                'kunbox.net': {
+                    'records': results,
+                },
+            },
+        },
+    }