bundles/powerdns: rework zone file generation

bundles/powerdns/items.py

@@ -5,26 +5,12 @@ from subprocess import check_output
 
 zone_path = join(repo.path, 'data', 'powerdns', 'files', 'bind-zones')
 
-ZONE_HEADER = """
-;      _    ____ _   _ _____ _   _ _   _  ____
-;     / \\  / ___| | | |_   _| | | | \\ | |/ ___|
-;    / _ \\| |   | |_| | | | | | | |  \\| | |  _
-;   / ___ \\ |___|  _  | | | | |_| | |\\  | |_| |
-;  /_/   \\_\\____|_| |_| |_|  \\___/|_| \\_|\\____|
-;
-; --> Diese Datei wird von BundleWrap verwaltet! <--
-
-$TTL 60
-@       IN  SOA ns-1.kunbox.net.    hostmaster.kunbox.net. (
-        {serial}
-        3600
-        600
-        86400
-        300
-    )
-"""
+nameservers = set()
 for rnode in sorted(repo.nodes_in_group('dns')):
-    ZONE_HEADER += '@       IN  NS {}.\n'.format(rnode.metadata.get('powerdns/my_hostname', rnode.metadata.get('hostname')))
+    if not rnode.metadata.get('powerdns/is_secondary'):
+        # hide the primary nameserver from auto-generated nameserver lists
+        continue
+    nameservers.add(rnode.metadata.get('powerdns/my_hostname', rnode.metadata.get('hostname')))
 
 directories = {
     '/etc/powerdns/pdns.d': {
@@ -102,7 +88,8 @@ if node.metadata.get('powerdns/features/bind', False):
         files[f'/var/lib/powerdns/zones/{zone}'] = {
             'content_type': 'mako',
             'context': {
-                'header': ZONE_HEADER.format(serial=serial),
+                'NAMESERVERS': '\n'.join(sorted({f'@ IN NS {ns}.' for ns in nameservers})),
+                'SERIAL': serial,
                 'metadata_records': node.metadata.get(f'powerdns/bind-zones/{zone}/records', []),
             },
             'source': f'bind-zones/{zone}',

data/powerdns/files/bind-zones/kunbox.net

@@ -1,4 +1,14 @@
-${header}
+$TTL 60
+@       IN  SOA ns-primary.kunbox.net.    hostmaster.kunbox.net. (
+        ${SERIAL}
+        3600
+        600
+        86400
+        300
+    )
+
+
+${NAMESERVERS}
 
 $ORIGIN kunbox.net.