Merge pull request #6 from runpod/FastAPI

Fast api

.github/workflows/ci_pylint.yml

@@ -34,4 +34,4 @@ jobs:
 
       - name: Pylint Source
         run: |
-          find . -type f -name '*.py' | xargs pylint
+          find . -type f -name '*.py' | xargs pylint --extension-pkg-whitelist='pydantic'

.gitignore

@@ -1,3 +1,6 @@
+env
+.env
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

docs/serverless/worker.md

@@ -15,6 +15,10 @@ RUNPOD_WEBHOOK_GET_JOB= # URL to get job work from
 RUNPOD_WEBHOOK_POST_OUTPUT= # URL to post output to
 RUNPOD_WEBHOOK_PING= # URL to ping
 RUNPOD_PING_INTERVAL= # Interval in milliseconds to ping the API (Default: 10000)
+
+# Realtime
+RUNPOD_REALTIME_PORT= # Port to listen on for realtime connections (Default: None)
+RUNPOD_REALTIME_CONCURRENCY= # Number of workers to spawn (Default: 1)
 ```
 
 ### Additional Variables

infer.py

@@ -5,6 +5,8 @@
 '''
 # pylint: disable=unused-argument,too-few-public-methods
 
+import runpod
+
 
 def validator():
     '''
@@ -38,3 +40,6 @@ def run(model_inputs):
             "seed": "1234"
         }
     ]
+
+
+runpod.serverless.start({"handler": run})

requirements.txt

@@ -3,3 +3,4 @@ python-dotenv >= 0.21.0
 requests >= 2.28.1
 boto3 >= 1.26.15
 aiohttp >= 3.8.3
+fastapi[all] >= 0.89.0

runpod/serverless/__init__.py

@@ -1,12 +1,22 @@
 ''' Allows serverless to recognized as a package.'''
 
+import os
 import asyncio
 
 from . import work_loop
+from .modules import rp_fastapi
 
 
 def start(config):
     '''
     Starts the serverless worker.
     '''
-    asyncio.run(work_loop.start_worker(config))
+    api_port = os.environ.get('RUNPOD_API_PORT', None)
+
+    if api_port:
+        api_server = rp_fastapi.WorkerAPI()
+        api_server.config = config
+
+        api_server.start_uvicorn(api_port)
+    else:
+        asyncio.run(work_loop.start_worker(config))

runpod/serverless/modules/logging.py

@@ -17,7 +17,7 @@ def log(message, level='INFO'):
     Log message to stdout if RUNPOD_DEBUG is true.
     '''
     if os.environ.get('RUNPOD_DEBUG', 'true') == 'true':
-        print(f'{level} | {message}')
+        print(f'{level} | {message}', flush=True)
 
 
 def log_secret(secret_name, secret, level='INFO'):

runpod/serverless/modules/rp_fastapi.py

@@ -0,0 +1,58 @@
+''' Used to launch the FastAPI web server when worker is running in API mode. '''
+
+import os
+import threading
+
+import uvicorn
+from fastapi import FastAPI
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+
+from .job import run_job
+from .worker_state import set_job_id
+from .heartbeat import start_heartbeat
+
+
+class Job(BaseModel):
+    ''' Represents a job. '''
+    id: str
+    input: dict
+
+
+class WorkerAPI:
+    ''' Used to launch the FastAPI web server when worker is running in API mode. '''
+
+    def __init__(self):
+        '''
+        Initializes the WorkerAPI class.
+        1. Starts the heartbeat thread.
+        2. Initializes the FastAPI web server.
+        '''
+        heartbeat_thread = threading.Thread(target=start_heartbeat)
+        heartbeat_thread.daemon = True
+        heartbeat_thread.start()
+
+        self.config = {"handler": None}
+        self.rp_app = FastAPI()
+        self.rp_app.add_api_route("/run", self.run, methods=["POST"])
+
+    def start_uvicorn(self, api_port):
+        '''
+        Starts the Uvicorn server.
+        '''
+        uvicorn.run(
+            self.rp_app, host='0.0.0.0', port=int(api_port),
+            workers=os.environ.get('RUNPOD_REALTIME_CONCURRENCY', 1)
+        )
+
+    async def run(self, job: Job):
+        '''
+        Performs model inference on the input data.
+        '''
+        set_job_id(job.id)
+
+        job_results = run_job(self.config["handler"], job.__dict__)
+
+        set_job_id(None)
+
+        return jsonable_encoder(job_results)

setup.cfg

@@ -31,3 +31,4 @@ install_requires =
     requests >= 2.28.1
     boto3 >= 1.26.15
     aiohttp >= 3.8.3
+    fastapi[all] >= 0.89.0