问题
I can't quite get Flask-SocketIO working with my instance on AWS Elastic Beanstalk (ELB), with the requirement of running Flask-SocketIO with socketio.run(application), ELB appears to make the calls to the global application object itself.
The ELB documentation states Using application.py as the filename and providing a callable application object (the Flask object, in this case) allows Elastic Beanstalk to easily find your application's code.
My ELB instance logs show the error RuntimeError: You need to use the eventlet server. See the Deployment section of the documentation for more information.
Is there any way to approach this problem assuming that AWS calls application.run()?
Thanks in advance
回答1:
Flask-SocketIO has very specific requirements on the load balancer and the web server. I think you can configure the ELB load balancer with sticky sessions and that would make it work, but the part that I think does not work is using the eventlet or gevent web servers, since AWS invokes the callable in its own way. What you need is a way to use socketio.run() or an equivalent procedure that starts the eventlet/gevent web server.
来源：https://stackoverflow.com/questions/52756046/deploy-flask-socketio-on-beanstalk