What happened (please include outputs or screenshots):

#2298 /#2303 implemented theprovideClusterInfo.

It misses this part (fromhttps://kubernetes.io/docs/reference/config-api/client-authentication.v1/#client-authentication-k8s-io-v1-Cluster):

Config holds additional config data that is specific to the exec plugin with regards to the cluster being authenticated to.

This data is sourced from the clientcmd Cluster object's extensions[client.authentication.k8s.io/exec] field:
...
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What you expected to happen:

client.authentication.k8s.io/exec extension is set toExecCredentialSpec.Cluster.config so thatgardenlogin can use it

How to reproduce it (as minimally and precisely as possible):

Unfortunately I only know how to reproduce it with aGardener Kubernetes setup.

Setup the KUBECONFIG environment:

• gardenctl target --garden xxx --project xxx --shoot xxx
• eval $(gardenctl kubectl-env zsh) -> this sets KUBECONFIG to a file, that looks like this:https://github.com/gardener/gardenlogin/blob/42df32af80451062f81c015c5e89a109c821e463/README.md?plain=1#L86-L99

Then run following script:

fromkubernetesimportclient,config# Configs can be set in Configuration class directly or using helper utilityconfig.load_kube_config()v1=client.CoreV1Api()print("Listing pods with their IPs:")ret=v1.list_namespaced_pod(namespace="default",watch=False)foriinret.items:print("%s\t%s\t%s"% (i.status.pod_ip,i.metadata.namespace,i.metadata.name))

You'll get an error:

'ERROR:root:exec: process returned 1. Error: name must be specified. Hint: update kubectl in case you are using a version older than v1.20.0Usage:  gardenlogin get-client-certificate [flags]Flags:...

Anything else we need to know?:

Environment:

• Kubernetes version (kubectl version):
• OS (e.g., MacOS 10.13.6):
• Python version (python --version)
• Python client version (pip list | grep kubernetes)