[platform] add ray_device_key (#11948)

Signed-off-by: youkaichao <youkaichao@gmail.com>

vllm/v1/executor/ray_utils.py

@@ -41,7 +41,12 @@ try:
 
         def get_node_and_gpu_ids(self) -> Tuple[str, List[int]]:
             node_id = ray.get_runtime_context().get_node_id()
-            gpu_ids = ray.get_gpu_ids()
+            device_key = current_platform.ray_device_key
+            if not device_key:
+                raise RuntimeError("current platform %s does not support ray.",
+                                   current_platform.device_name)
+            gpu_ids = ray.get_runtime_context().get_accelerator_ids(
+            )[device_key]
             return node_id, gpu_ids
 
         def setup_device_if_necessary(self):
@@ -211,7 +216,11 @@ def initialize_ray_cluster(
         # Placement group is already set.
         return
 
-    device_str = "GPU" if not current_platform.is_tpu() else "TPU"
+    device_str = current_platform.ray_device_key
+    if not device_str:
+        raise ValueError(
+            f"current platform {current_platform.device_name} does not "
+            "support ray.")
     # Create placement group for worker processes
     current_placement_group = ray.util.get_current_placement_group()
     if current_placement_group: