To reproduce, do this follow K8s Anywhere setup and deploy scope like this:

kubectl create -f https://gist.github.com/errordeveloper/9d9a995df05064ea3f600a0378de3aaf/raw/scope.json --validate=false

You should be able to access the app on the following URL and observe error 400 occurring for all of WebSocket requests.

http://localhost:8001/api/v1/proxy/namespaces/default/services/weavescope-app:app/

xref kubernetes/kubernetes#25126

@2opremio and I discussed this offline, and it looks like it’s not something we can fix soon, but I’d like to keep it open unless we would like to explicitly document the fact that Scope doesn't work with kubectl proxy.

I think there's little point in keeping this issue open when there's an upstream ticket already tracking it.

That's true, I created this in the process of figuring it out. However, if
we close it now, we should consider that it's referenced in Kubernetes
repo, closing it would indicate as if it's no longer a problem for us,
while still really is a problem.

On Wed, 4 May 2016, 15:53 Alfonso Acosta, notifications@github.com wrote:

I think there's little point on keeping this issue open when there's an
upstream ticket already tracking it.

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#1427 (comment)

Hi all, I am getting the same problem. I am not able to access the weave-scope live mode (communicates using web sockets). However, I am able to access pause mode (Plain http).
I am trying to access weave-scope using /api/v1/namespaces/weave/services/weave-scope-app/proxy/

Is this issue resolved yet? If not, then please provide me some pointers so that I can try to work on it.

@satyamz the issue has been fixed in Kubernetes 1.8 (see kubernetes/kubernetes#49534). If you are using an older version of Kubernetes, please use kubectl port-foward (as describe in the docs).