Facing Container startup issue, when deploying Quart App in Azure APP service

Question

I'm trying to deploy a Quart application to Azure App Service using a Docker container, but I'm running into an issue where the Docker container fails to start on port 8000 and disconnects.

from quart import Quart

app = Quart(__name__)

@app.route('/')
async def hello():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run()

Startup command Used : hypercorn -b 0.0.0.0:8080 app:app

Other configurations

SCM_DO_BUILD_DURING_DEPLOYMENT=1

Deployment Type : Manual Deployment from VS Code

App service Plan : Basic - Linux

Error Faced: ERROR - Container for site has exited, failing site start ERROR - Container didn't respond to HTTP pings on port: 8080, failing site start. See container logs for debugging.

Expected Outcome:

Container needs to be started and need to also verify the startup command given was correct w.r.t to Quart

Answer 1

Based on the error message provided, the issue is related to the startup command.

I tried configuring the startup command that you've used, but I got the same error. So, I changed the startup command to

gunicorn -w 4 -k uvicorn.workers.UvicornWorker app:app

I created a simple Quart application and successfully deployed it to Azure App Service without any issues.

This is requirements.txt:

quart
hypercon
gunicorn
uvicorn

app .py:

import  os
from  quart  import  Quart
app  =  Quart(__name__ 
@app.route('/')
async  def  hello():
return  'Hello, World!'
if  __name__  ==  '__main__':
port  =  int(os.environ.get("PORT", 8080))
app.run(host='0.0.0.0', port=port)

I deployed the app successfully via visual studio code extension.

configure the below startup command to azure app service.

Here's the output after deployment: