Sync from v0.13

examples/online_serving/elastic_ep/scale.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import argparse
+import json
+import sys
+
+import requests
+
+
+def scale(host, port, new_dp_size):
+    url = f"http://{host}:{port}/scale_elastic_ep"
+    payload = {"new_data_parallel_size": new_dp_size}
+    headers = {"Content-Type": "application/json"}
+
+    print(f"Sending scale request to {url}")
+    print(f"Payload: {json.dumps(payload, indent=2)}")
+
+    try:
+        response = requests.post(url, json=payload, headers=headers, timeout=300)
+
+        print(f"Status Code: {response.status_code}")
+        print(f"Response: {response.text}")
+
+        if response.status_code == 200:
+            print("Scale up/down request successful!")
+            return True
+        else:
+            print("Scale up/down request failed!")
+            return False
+
+    except requests.exceptions.RequestException as e:
+        print(f"Request failed: {e}")
+        return False
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Test scale up/down functionality")
+    parser.add_argument("--host", default="localhost", help="API server host")
+    parser.add_argument("--port", type=int, default=8006, help="API server port")
+    parser.add_argument(
+        "--new-dp-size", type=int, default=2, help="New data parallel size"
+    )
+
+    args = parser.parse_args()
+
+    success = scale(args.host, args.port, args.new_dp_size)
+    sys.exit(0 if success else 1)
+
+
+if __name__ == "__main__":
+    main()