✨ Support `--log-config` option by 07pepa · Pull Request #36 · fastapi/fastapi-cli

Following up on my previous comment saying that after some studies I will suggest for production service to avoid fastapi-cli installing fastapi and uvicorn without fastapi[standard] or other versions.

You can create the main.py file with explicit uvicorn configuration:

import uvicorn

uvicorn.run(
    "app_folder.app_creator:app",
    host=<host>,  # example: "0.0.0.0"
    port=<port>,  # example: 8080
    workers=<workers>,  # example: 3
    reload=<reload>,  # false in production
    log_config=<logging_config dict> # Optional
)

• I suggest to use pydantic-settings to create a configuration object containing all the parameters in order to be flexible with different configuration sources having a type validation
• logging_config dict follow the python logging standard configuration that can be found here. In this way you can have a clean cli that is much readable server-side and you can set up other handlers like jsonl file or more fancy handlers. In my case I set up a clean and minimal cli log without fancy lines and similar stuff, plus a jsonl like handler that split the file by level and rotate them, all the handlers managed by a queue handler that process them in a separated thread in order to avoid api performance issues.

In app_creator.py create your FastAPI app with all necessary components like lifespan, routers, middleware etc.
Something similar to:

from fastapi import FastAPI

app = FastAPI(
    title="Your API",
    # all needed parameters and configurations
)

# Add routers, middleware, exception handlers, etc.
app.include_router(your_router)