[model server] add multi node args check

tests/model_serving/model_server/multi_node/conftest.py

@@ -144,15 +144,15 @@ def patched_multi_node_isvc_external_route(
 
 
 @pytest.fixture(scope="function")
-def patched_multi_node_worker_spec(
+def patched_multi_node_spec(
     request: FixtureRequest,
     multi_node_inference_service: InferenceService,
 ) -> Generator[InferenceService, Any, Any]:
     with ResourceEditor(
         patches={
             multi_node_inference_service: {
                 "spec": {
-                    "predictor": {"workerSpec": request.param["worker-spec"]},
+                    "predictor": request.param["spec"],
                 },
             }
         }

tests/model_serving/model_server/multi_node/test_nvidia_multi_node.py

@@ -9,6 +9,7 @@
 )
 from tests.model_serving.model_server.multi_node.utils import (
     get_pods_by_isvc_generation,
+    is_arg_in_model_spec,
     verify_nvidia_gpu_status,
     verify_ray_status,
 )
@@ -23,6 +24,7 @@
 
 
 LOGGER = get_logger(name=__name__)
+MAX_NUM_BATCHED_TOKENS_ARG: str = "--max-num-batched-tokens=256"
 
 
 @pytest.mark.parametrize(
@@ -168,17 +170,26 @@ def test_multi_node_basic_external_inference(self, patched_multi_node_isvc_exter
         )
 
     @pytest.mark.parametrize(
-        "patched_multi_node_worker_spec",
-        [pytest.param({"worker-spec": {"pipelineParallelSize": 2, "tensorParallelSize": 4}})],
+        "patched_multi_node_spec",
+        [
+            pytest.param({
+                "spec": {
+                    "workerSpec": {
+                        "pipelineParallelSize": 2,
+                        "tensorParallelSize": 4,
+                    }
+                }
+            })
+        ],
         indirect=True,
     )
-    def test_multi_node_tensor_parallel_size_propagation(self, admin_client, patched_multi_node_worker_spec):
+    def test_multi_node_tensor_parallel_size_propagation(self, admin_client, patched_multi_node_spec):
         """Test multi node tensor parallel size (number of GPUs per pod) propagation to pod config"""
-        isvc_parallel_size = str(patched_multi_node_worker_spec.instance.spec.predictor.workerSpec.tensorParallelSize)
+        isvc_parallel_size = str(patched_multi_node_spec.instance.spec.predictor.workerSpec.tensorParallelSize)
 
         failed_pods: list[dict[str, Any]] = []
 
-        for pod in get_pods_by_isvc_generation(client=admin_client, isvc=patched_multi_node_worker_spec):
+        for pod in get_pods_by_isvc_generation(client=admin_client, isvc=patched_multi_node_spec):
             pod_resources = pod.instance.spec.containers[0].resources
             if not (
                 isvc_parallel_size
@@ -191,17 +202,43 @@ def test_multi_node_tensor_parallel_size_propagation(self, admin_client, patched
             pytest.fail(f"Failed pods resources : {failed_pods}, expected tesnor parallel size {isvc_parallel_size}")
 
     @pytest.mark.parametrize(
-        "patched_multi_node_worker_spec",
-        [pytest.param({"worker-spec": {"pipelineParallelSize": 2, "tensorParallelSize": 1}})],
+        "patched_multi_node_spec",
+        [
+            pytest.param({
+                "spec": {
+                    "workerSpec": {
+                        "pipelineParallelSize": 2,
+                        "tensorParallelSize": 1,
+                    }
+                }
+            })
+        ],
         indirect=True,
     )
-    def test_multi_node_pipeline_parallel_size_propagation(self, admin_client, patched_multi_node_worker_spec):
+    def test_multi_node_pipeline_parallel_size_propagation(self, admin_client, patched_multi_node_spec):
         """Test multi node pipeline parallel size (number of pods) propagation to pod config"""
-        isvc_parallel_size = patched_multi_node_worker_spec.instance.spec.predictor.workerSpec.pipelineParallelSize
-        isvc_num_pods = get_pods_by_isvc_generation(client=admin_client, isvc=patched_multi_node_worker_spec)
+        isvc_parallel_size = patched_multi_node_spec.instance.spec.predictor.workerSpec.pipelineParallelSize
+        isvc_num_pods = get_pods_by_isvc_generation(client=admin_client, isvc=patched_multi_node_spec)
 
         if isvc_parallel_size != len(isvc_num_pods):
             pytest.fail(
                 f"Expected pipeline parallel size {isvc_parallel_size} "
                 f"does not match number of pods {len(isvc_num_pods)}"
             )
+
+    @pytest.mark.parametrize(
+        "patched_multi_node_spec",
+        [pytest.param({"spec": {"model": {"args": [MAX_NUM_BATCHED_TOKENS_ARG]}}})],
+        indirect=True,
+    )
+    @pytest.mark.dependency(name="test_model_args_added_to_vllm_command")
+    def test_model_args_added_to_model_spec(self, admin_client, patched_multi_node_spec):
+        """Test model args added to vllm command"""
+        if not is_arg_in_model_spec(client=admin_client, isvc=patched_multi_node_spec, arg=MAX_NUM_BATCHED_TOKENS_ARG):
+            pytest.fail(f"{MAX_NUM_BATCHED_TOKENS_ARG} model args is not set in spec")
+
+    @pytest.mark.dependency(depends=["test_model_args_added_to_vllm_command"])
+    def test_model_args_removed_from_model_spec(self, admin_client, multi_node_inference_service):
+        """Test model args removed from vllm command"""
+        if is_arg_in_model_spec(client=admin_client, isvc=multi_node_inference_service, arg=MAX_NUM_BATCHED_TOKENS_ARG):
+            pytest.fail(f"{MAX_NUM_BATCHED_TOKENS_ARG} model args is not removed from spec")

tests/model_serving/model_server/multi_node/utils.py

@@ -90,10 +90,10 @@ def delete_multi_node_pod_by_role(client: DynamicClient, isvc: InferenceService,
 
     for pod in pods:
         if role == WORKER_POD_ROLE and WORKER_POD_ROLE in pod.name:
-            pod.delete()
+            pod.delete(wait=True)
 
         elif role == HEAD_POD_ROLE and WORKER_POD_ROLE not in pod.name:
-            pod.delete()
+            pod.delete(wait=True)
 
 
 @retry(wait_timeout=Timeout.TIMEOUT_2MIN, sleep=5)
@@ -122,3 +122,26 @@ def get_pods_by_isvc_generation(client: DynamicClient, isvc: InferenceService) -
         return pods
 
     raise ResourceNotFoundError(f"InferenceService {isvc.name} generation {isvc_generation} has no pods")
+
+
+def is_arg_in_model_spec(client: DynamicClient, isvc: InferenceService, arg: str) -> bool:
+    """
+    Check if arg is in model spec; spec.model.args are only added to head pod
+
+    Args:
+        client (DynamicClient): OCP Client to use.
+        isvc (InferenceService): InferenceService object.
+        arg (str): arg to check
+
+    Returns:
+        bool: True if arg is in model spec, False otherwise
+
+    Raises:
+        ResourceNotFoundError if no head pod found.
+
+    """
+    for pod in get_pods_by_isvc_generation(client=client, isvc=isvc):
+        if WORKER_POD_ROLE not in pod.name:
+            return arg in pod.instance.spec.containers[0].args
+
+    raise ResourceNotFoundError(f"InferenceService {isvc.name} has no head pod")