[0.11.0][Bugfix] Remove the ZMQ communication setup on the D node (#4916)

In the PD separation scenario, the D node does not need to perform get
operations, and therefore does not need to create ZeroMQ (ZMQ)
communication.
---------

Signed-off-by: SlightwindSec <[email protected]>

Author: SlightwindSec

vllm_ascend/distributed/mooncake/mooncake_store_connector_v1.py

@@ -45,7 +45,7 @@ def __init__(self, vllm_config: VllmConfig, role: KVConnectorRole):
             )
 
             assert self.connector_worker is not None
-            if vllm_config.parallel_config.rank == 0:
+            if vllm_config.parallel_config.rank == 0 and self.kv_role != "kv_consumer":
                 self.lookup_server = MooncakeLookupServer(
                     self.connector_worker, vllm_config, self.use_layerwise)
 
@@ -160,9 +160,10 @@ def get_zmq_rpc_path_mooncake(
 class MooncakeStoreConnectorV1Scheduler:
 
     def __init__(self, vllm_config: "VllmConfig", use_layerwise):
-        self.client = MooncakeLookupClient(vllm_config)
         self.use_layerwise = use_layerwise
         self.kv_role = vllm_config.kv_transfer_config.kv_role
+        self.client = MooncakeLookupClient(
+            vllm_config) if self.kv_role != "kv_consumer" else None
         self.consumer_is_to_load = vllm_config.kv_transfer_config.kv_connector_extra_config.get(
             "consumer_is_to_load", False)
         self.load_async = vllm_config.kv_transfer_config.kv_connector_extra_config.get(
@@ -207,7 +208,8 @@ def get_num_new_matched_tokens(
         else:
             token_ids = torch.tensor(request.prompt_token_ids)
 
-        num_external_hit_tokens = self.client.lookup(token_ids)
+        num_external_hit_tokens = self.client.lookup(  # type: ignore[union-attr]
+            token_ids)
 
         if num_external_hit_tokens == request.num_tokens:
             num_external_hit_tokens -= 1