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53845714nF / EventTom

The project is part of the subject Software Architecture and Quality Assurance. A subject from the first semester of the Master's in Computer Science.

Repository from Github https://github.com53845714nF/EventTomRepository from Github https://github.com53845714nF/EventTom

Use of websockets when backend is running on multiple EC2 instances

LuchsHub opened this issue · comments

commented

Currently, all active websocket connections are tracked by the ConnectionManager manager in the backend.

https://github.com/53845714nF/EventTom/blob/main/backend/app/api/websockets.py

For Cloud Computing, an ALB with multiple EC2 instances has been suggested. If some websocket connections are established with one, some with another, then neither instance will know all websocket connections. This is problematic, because update messages should be sent to all websockets.

commented

Do you have an idea of how to solve this yet?

commented

I don't think we've even got to that problem yet.
I would set it up like this for the time being as it works 90% of the time.

It's also a nice error that you can pack into a presentation. To finally solve this, we would probably have to write a database function that the backend listens to.