use proxy for websocket/upgrade requests
use proxy for websocket/upgrade requests

Problem:
If rancher is configured to only use proxy for outgoing requests,
kubectl exec shell or view logs fail for cloud drivers because
they directly talk to k8s api.

Solution:
Use custom upgrade proxy

rancherio/rancher,rancherio/rancher,rancher/rancher,rancher/rancher,rancher/rancher,rancher/rancher