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simple_fastapi_celery's Introduction

Simple FastAPI & Celery

The project is to learn and demostrate how a FastAPI webapp communicate a remote (in a different machine) Celery worker.

Why FastAPI

it can do async more easyly as it can utilise ASGI framework instead of WSGI.

Why Remote Celery

Our goal is to decouple the webapp and the worker, in particular the work runs on a remote cluster with heavy duty programme.

Overview

  • web_app.main.py creates fastapi app and define two simple method to submit a task to redis and get task status from redis. ++ [post] send_task ++ [get] get_task
  • remote_worker.celery_app.py setups a celery app and define a task: ++ trigger_task

Both modules must have the same celery app config.

How to use

  1. you must have docker installed.
  2. git clone this repo.
  3. in project folder run docker-compose build && docker-compose up
  4. use docker dashboard to see four container in action.
  5. use localhost:8000 in browser to see hello world.
  6. use localhost:8000/doc in browser to see fastapi endpoint and to test them out.
  7. use http://localhost:5555 in browser to see flower monitoring the redis queue.

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