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Add the support for vLLM data parallel configuration in SwiftDeploy #6114

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Merged
merged 2 commits into from
Oct 14, 2025
Merged

Add the support for vLLM data parallel configuration in SwiftDeploy #6114

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1b12d0c
Add the support for vLLM data parallel configuration in SwiftDeploy
YushunXiang Oct 13, 2025
63608bf
Update swift/llm/infer/deploy.py
YushunXiang Oct 13, 2025
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14 changes: 13 additions & 1 deletion swift/llm/infer/deploy.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse, StreamingResponse

from swift.llm import AdapterRequest, DeployArguments
from swift.llm import AdapterRequest, DeployArguments, InferArguments
from swift.llm.infer.protocol import EmbeddingRequest, MultiModalRequestMixin
from swift.plugin import InferStats
from swift.utils import JsonlWriter, get_logger
Expand All @@ -30,6 +30,18 @@ class SwiftDeploy(SwiftInfer):
args_class = DeployArguments
args: args_class

@staticmethod
def get_infer_engine(args: InferArguments, template=None, **kwargs):
if isinstance(args, DeployArguments) and args.infer_backend == 'vllm' and args.vllm_data_parallel_size > 1:
if not args.vllm_use_async_engine:
raise ValueError('vLLM data parallel requires `vllm_use_async_engine=True` in deploy mode.')
engine_kwargs = kwargs.pop('engine_kwargs', None) or {}
engine_kwargs = dict(engine_kwargs)
engine_kwargs.setdefault('data_parallel_size', args.vllm_data_parallel_size)
kwargs['engine_kwargs'] = engine_kwargs
logger.info(f'Enable vLLM data parallel with size {args.vllm_data_parallel_size}.')
return SwiftInfer.get_infer_engine(args, template, **kwargs)

def _register_app(self):
self.app.get('/v1/models')(self.get_available_models)
self.app.post('/v1/chat/completions')(self.create_chat_completion)
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