I’ve been trying to configure access to multiple Kubernetes clusters by merging multiple kubeconfig files, as explained in the (site.kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/). While the individual files seem to work fine, I’m facing issues when merging them and switching between contexts.
Here’s what I did:
- Created two kubeconfig files (
config-demo
andconfig-demo-2
) with the following contexts:
config-demo
contains contexts fordev-frontend
,dev-storage
, andexp-test
.config-demo-2
contains a new context,dev-ramp-up
.
Merged the two files by setting the KUBECONFIG
environment variable:
export KUBECONFIG="config-demo:config-demo-2"
Ran kubectl config view
to verify the merged configuration, and the contexts appeared as expected.
Here’s the problem:
- When I switch to the
dev-ramp-up
context using:
kubectl config use-context dev-ramp-up
and try running any command, I get errors like Error from server (Unauthorized): the server does not allow this request for this user on the current namespace
.
- On further investigation using:
kubectl auth whoami
it shows incorrect or missing user attributes for the context, even though the user credentials are properly defined in the kubeconfig file.
Questions:
- Are there specific merging rules that could cause user credentials to be overwritten or ignored when combining multiple kubeconfig files?
- How can I ensure that the correct user attributes are retained for all contexts when switching?
- Is there a way to debug or validate the merged kubeconfig file to pinpoint where the issue is occurring?
If anyone has encountered a similar problem or has insights into resolving this, your help would be greatly appreciated!