[Web] Unable to get all cluster pods when using kube-scheduler-simulator to demonstrate the K8s scheduler in a real cluster

[Lan-ce-lot]

Description:

I am trying to integrate kube-scheduler-simulator with a real Kubernetes cluster.

Steps to Reproduce:

1. Build the kube-scheduler-simulator frontend image using make docker_build_front.
2. Configure apiserver with --cors-allowed-origins=http://*.
3. Run kubectl proxy --port=3131 to serve the Kubernetes API on http://127.0.0.1:3131.
4. Start the kube-scheduler-simulator frontend container using docker-compose up -d simulator-frontend.
   Issue a curl request to http://localhost:3131/api/v1/namespaces//pods.

Actual Behavior:

However, this is not a cross -domain problem.

Additional Information:

kube-apiserver version: v1.22.17
The API that should return all pods is accessed using api/v1/namespaces//pods. But:

$ curl http://localhost:3131/api/v1/namespaces//pods
<a href="/api/v1/namespaces/pods">Moved Permanently</a>.

I found api/v1/pods can do this well.

Solution:

Based on my understanding, the correct API to retrieve all pods is api/v1/pods instead of api/v1/namespaces//pods in some versions of Kube-Apiserver. It seems that the issue may be related to the incorrect API path being used.