fix bug in master pipeline

openappstack/__main__.py

@@ -274,6 +274,7 @@ def create(clus, args):  # pylint: disable=too-many-branches
                        'characters'), MAX_DOMAIN_LENGTH)
             sys.exit(1)
 
+        subdomain = args.subdomain
         if len(args.domain) + len(args.subdomain) + 1 > MAX_DOMAIN_LENGTH:
             if args.truncate_subdomain:
                 half_required_length = floor((MAX_DOMAIN_LENGTH - len(args.domain) - 1)/2)