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AKS Downstream Cluster not Available with Websockets failing

This document (000020767) is provided subject to the disclaimer at the end of this document.


Rancher 2.6.x
AKS 1.22+


After upgrading AKS to version 1.22+ users may experience a situation where the Downstream clusters show as unavailable on Rancher.
Testing the Websocket using these instructions will show the following error:
Bad Request
{"baseType":"error","code":"ServerError","message":"websocket: the client is not using the websocket protocol: 'upgrade' token not found in 'Connection' header","status":400,"type":"error"}


Update the Kubernetes Ingress NGINX with the tag --set controller.watchIngressWithoutClass=true:
helm upgrade --install \
  ingress-nginx ingress-nginx/ingress-nginx \
  --namespace ingress-nginx \
  --set controller.service.type=LoadBalancer \
  --version 4.0.18 \
  --create-namespace \
  --set controller.watchIngressWithoutClass=true
Alternatively, on Rancher 2.6.7 onward, you can add the class name on the helm install/upgrade steps :
--set ingress.ingressClassName=nginx


Kubernetes version 1.22 deprecated versions of the Ingress APIs in favor of the stable API. That leads to this scenario, where we update the controller.watchIngressWithoutClass tag.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000020767
  • Creation Date: 16-Sep-2022
  • Modified Date:19-Mar-2024
    • SUSE Rancher

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