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Fix support for API concurrency > 1 by updating Uvicorn launch logic #408

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Fix support for API concurrency > 1 by updating Uvicorn launch logic #408

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447d6d3
Update rp_fastapi.py
DifferentialityDevelopment Apr 10, 2025
5503416
Update rp_fastapi.py
DifferentialityDevelopment Apr 10, 2025
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31 changes: 23 additions & 8 deletions runpod/serverless/modules/rp_fastapi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -271,14 +271,29 @@ def start_uvicorn(self, api_host="localhost", api_port=8000, api_concurrency=1):
"""
Starts the Uvicorn server.
"""
uvicorn.run(
self.rp_app,
host=api_host,
port=int(api_port),
workers=int(api_concurrency),
log_level=os.environ.get("UVICORN_LOG_LEVEL", "info"),
access_log=False,
)
if api_concurrency > 1:
# For multiple workers, we need to use the module:app format
import uvicorn.workers
uvicorn.run(
"runpod.serverless.modules.rp_fastapi:app",
host=api_host,
port=int(api_port),
workers=int(api_concurrency),
log_level=os.environ.get("UVICORN_LOG_LEVEL", "info"),
access_log=False,
factory=True
)
else:
# For single worker, we can use the app instance directly
import uvicorn.workers
uvicorn.run(
self.rp_app,
host=api_host,
port=int(api_port),
workers=1,
log_level=os.environ.get("UVICORN_LOG_LEVEL", "info"),
access_log=False
)

# ----------------------------- Realtime Endpoint ---------------------------- #
async def _realtime(self, job: Job):
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