NGINX Ingress Controller Websocket error

[AnnapoornaKaradi]

Problem Description:

You are using Blazor Server and the Websocket-SignalR connection fails.

Environment:

Pre-Prod
Hosted in AKS
Using AKS ingress load balancer.

Summary:

• Tried testing with Postman and we saw 404's:
o
o
• We discussed 2 approaches:
o Use Azure SignalR which is managed connection proxy for SignalR:
 Azure SignalR Service internals | Microsoft Learn
 Tutorial: Build a Blazor Server chat app - Azure SignalR | Azure Docs
 With Azure SignalR, the connections are offloaded from App server, and the connection scaling is decoupled from business logic scaling.
o Further troubleshooting:
 SignalR Apps cannot be scaled horizontally without a backplane. So, if we have more than one server, the connection request can go to other node which doesn't know about the connectionId:
 ASP.NET Core SignalR production hosting and scaling | Microsoft Learn
 We can try with setting the number of servers to 1 to eliminate this situation.
 If this still doesn't help, we will have to understand whether the AKS ingress supports WebSocket's:

nginx.ingress.kubernetes.io/session-cookie-expires: "172800"
nginx.ingress.kubernetes.io/session-cookie-max-age: "172800"
nginx.ingress.kubernetes.io/affinity-mode: persistent
nginx.ingress.kubernetes.io/session-cookie-hash: sha1

#new changes for testing aks blazor websocket issue fix
nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
nginx.ingress.kubernetes.io/proxy-send-timeout: "3600"
nginx.ingress.kubernetes.io/proxy-request-buffering: "off"
# nginx.ingress.kubernetes.io/upgrade: "websocket"
# nginx.ingress.kubernetes.io/connection-proxy-header: "upgrade"

• Reference - Using Websockets with the Nginx Kubernetes Ingress Controller - Civo.com

[mkingst]

Hi! Thank you for bringing this up. It seems you are using the community Ingress Controller, which can be found here .

If you are using the official NGINX Ingress Controller by F5, we recommend raising this issue here .

Please note that this repository contains documentation for all NGINX products.

[JTorreG]

Hi @AnnapoornaKaradi

I am going to close this issue, assuming that @mkingst is correct and you followed the steps he suggested.

Don't hesitate to comment or open a new issue if you still need help with the NGINX Documentation.