1 files changed, 18 insertions, 8 deletions
diff --git a/ext/http/00_serve.ts b/ext/http/00_serve.ts
index 8ed1a1d04..9c6f80552 100644
--- a/ext/http/00_serve.ts
+++ b/ext/http/00_serve.ts
@@ -579,6 +579,8 @@ type RawServeOptions = {
   handler?: RawHandler;
 };
 
+const kLoadBalanced = Symbol("kLoadBalanced");
+
 function serve(arg1, arg2) {
   let options: RawServeOptions | undefined;
   let handler: RawHandler | undefined;
@@ -634,6 +636,7 @@ function serve(arg1, arg2) {
     hostname: options.hostname ?? "0.0.0.0",
     port: options.port ?? 8000,
     reusePort: options.reusePort ?? false,
+    loadBalanced: options[kLoadBalanced] ?? false,
   };
 
   if (options.certFile || options.keyFile) {
@@ -842,18 +845,25 @@ function registerDeclarativeServer(exports) {
         "Invalid type for fetch: must be a function with a single or no parameter",
       );
     }
-    return ({ servePort, serveHost }) => {
+    return ({ servePort, serveHost, serveIsMain, serveWorkerCount }) => {
       Deno.serve({
         port: servePort,
         hostname: serveHost,
+        [kLoadBalanced]: (serveIsMain && serveWorkerCount > 1) ||
+          (serveWorkerCount !== null),
         onListen: ({ port, hostname }) => {
-          console.debug(
-            `%cdeno serve%c: Listening on %chttp://${hostname}:${port}/%c`,
-            "color: green",
-            "color: inherit",
-            "color: yellow",
-            "color: inherit",
-          );
+          if (serveIsMain) {
+            const nThreads = serveWorkerCount > 1
+              ? ` with ${serveWorkerCount} threads`
+              : "";
+            console.debug(
+              `%cdeno serve%c: Listening on %chttp://${hostname}:${port}/%c${nThreads}`,
+              "color: green",
+              "color: inherit",
+              "color: yellow",
+              "color: inherit",
+            );
+          }
         },
         handler: (req) => {
           return exports.fetch(req);