bundles/nginx: add deployment of vhost configs

bundles/nginx/metadata.py

@@ -24,3 +24,16 @@ def defaults(metadata):
             'worker_connections': 1000,
         },
     }, DEFAULTS, DONE
+
+
+@metadata_processor
+def letsencrypt(metadata):
+    if not node.has_bundle('letsencrypt'):
+        return metadata, DONE
+
+    le = metadata.setdefault('letsencrypt', {}).setdefault('domains', {})
+
+    for domain in metadata.get('nginx', {}).get('vhosts', {}).keys():
+        le[domain] = set()
+
+    return metadata, RUN_ME_AGAIN