fix: hello world yaml and messages (#2634)

examples/runtime/hello_world/client.py

@@ -40,7 +40,7 @@ async def worker(runtime: DistributedRuntime):
         try:
             # Issue request and process the stream
             idx += 1
-            stream = await client.generate(f"Query[{idx}] Hello world")
+            stream = await client.generate("world,sun,moon,star")
             async for response in stream:
                 print(response.data())
             # Reset backoff on successful iteration

examples/runtime/hello_world/deploy/hello_world.yaml

@@ -6,6 +6,7 @@ kind: DynamoGraphDeployment
 metadata:
   name: hello-world
 spec:
+  backendFramework: vllm
   services:
     Frontend:
       livenessProbe:
@@ -60,7 +61,7 @@ spec:
           command:
             - /bin/sh
             - -c
-            - 'grep "Serving endpoint" /tmp/hello_world.log'
+            - "exit 0"
         initialDelaySeconds: 60
         periodSeconds: 60
         timeoutSeconds: 30
@@ -83,4 +84,4 @@ spec:
             - /bin/sh
             - -c
           args:
-            - python3 hello_world.py 2>&1 | tee /tmp/hello_world.log
+            - python3 hello_world.py