code cleanup

Author: neerfri

rootfs/etc/nginx/lua/balancer.lua

@@ -73,6 +73,10 @@ local function get_implementation(backend)
 end
 
 local function resolve_external_names(original_backend)
+  if not original_backend.endpoints or
+     #original_backend.endpoints == 0 then
+    return original_backend
+  end
   local backend = util.deepcopy(original_backend)
   local endpoints = {}
   for _, endpoint in ipairs(backend.endpoints) do
@@ -106,11 +110,6 @@ local function is_backend_with_external_name(backend)
 end
 
 local function sync_backend(backend)
-  if not backend.endpoints or #backend.endpoints == 0 then
-    balancers[backend.name] = nil
-    return
-  end
-
   if is_backend_with_external_name(backend) then
     backend = resolve_external_names(backend)
   end
@@ -123,7 +122,6 @@ local function sync_backend(backend)
     balancers[backend.name] = nil
     return
   end
-  print("\nSyncing backend: ", backend.name, "with endpoints: ", cjson.encode(backend.endpoints))
 
   backend.endpoints = format_ipv6_endpoints(backend.endpoints)