Expected Behavior

A port-forward that requires websockets should be able to successfully connect and forward traffic.

Doing the same port-forward with the kubectl port-forward command works as expected.

Current Behavior

Currently the connection fails with an "Upgrade connection request" error.

Steps to Reproduce

Context

tilt doctor Output

$ tilt doctor
...

About Your Use Case

We are running vcluster to have multiple clusters running on a single physical cluster. We have placed an Envoy proxy in-front of the vcluster API proxies to route traffic over L7. The kubectl port-forward command works without issue and upgrades to a websockets connection. The tilt code is still trying to use spdy which Envoyproxy doesn't support so the code needs to be updated to fix this issue.