WebSocket subscription not working while using multiple Application Load Balancer

Hi,

We are Using Application Load Balancer for our website, We have configured it as below,

Two Client instances ( client-A and client-B ) for Front-End
Two Server instances ( server-A and server-B ) for Back-end

If we use 2 instances for the client & single instance for the server, then every WebSocket **Subscription is working fine **But if we switch it to 2 instances for clients & 2 instances for the server, then the **WebSocket subscriptions are not working **at all.

Kindly let us know, Is there any methods available to handle web-socket using Load Balancer on AWS, If yes, then kindly guide us to sort out this issue.

We also want to know, To which instance the WebSocket request is entering and from which instance the response is coming out. So kindly help us.

Thanks in Advance...

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アプリケーションロードバランサー

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English

AWS-User-1055940

質問済み 2年前761ビュー

1回答

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Hi.

Do you have two ALBs for the front end and ALB for the back end? What are the roles of front-end and back-end applications?

When a user accesses the backend ALB from a client, the first thing that comes to mind is a session. WebSocket is stateful. Try ALB's Sticky Session first.

https://docs.aws.amazon.com/elasticloadbalancing/latest/application/sticky-sessions.html

エキスパート

iwasa

回答済み 2年前

AWS-User-1055940
2年前
hi, We have two front facing ALB and another two back-end server facing ALB this how its work all back end will be in private facing only ALB in public so this ALB will connect front end server and front end ALB will in the DNS pointed

so i need sticky-sessions which not working for this issues
iwasa エキスパート
2年前
If you are using multiple ALBs, can you have a minimal architectural diagram?
AWS-User-1055940
2年前
yes We have architectural diagram but we can not revel here so if there any question which help you to understand the issues kindly let me know

WebSocket subscription not working while using multiple Application Load Balancer

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