kubectl Please enter Username: error: EOF - kubernetes

Question

I started getting an error in my CI process Please enter Username: error: EOF when running kubectl commands.
The kubectl version matches the cluster version, and I can run the same commands fine from my machine with the same configuration shown by kubectl config view.
Here are the logs:
+ kubectl config view
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: DATA+OMITTED
server: REDACTED_FOR_QUESTION
name: REDACTED_FOR_QUESTION
contexts:
- context:
cluster: REDACTED_FOR_QUESTION
user: REDACTED_FOR_QUESTION
name: REDACTED_FOR_QUESTION
current-context: REDACTED_FOR_QUESTION
kind: Config
preferences: {}
users:
- name: REDACTED_FOR_QUESTION
user:
client-certificate-data: REDACTED
client-key-data: REDACTED
++ echo 'Starting Kube proxy - port is 8001'
++ set +e
++ echo 'using kubectl'
++ sleep 1
++ kubectl proxy --port=8001
error: EOF
++ cat backingfile
++ rm backingfile
++ set -e
+ echo Starting Kube proxy - port is 8001 using kubectl Please enter Username:
Starting Kube proxy - port is 8001 using kubectl Please enter Username:
+ kubectl version
Please enter Username: error: EOF
Exited with code 1
What I am doing in my script is the following:
echo "using kubectl"
kubectl proxy --port=${KUBECTL_PROXY_PORT} > backingfile &
sleep 1 && cat backingfile && rm backingfile
set -e
As this allowed me to launch kubectl in the background but still get the logs of the command.
What is causing this error and how can I run the command successfully again? Please enter Username: error: EOF

Answer 1

It looks like you are pointing to the different KUBECONFIG files:
1. You should verify your KUBECONFIG varaible,
2. You can add in your script --kubeconfig=absolute_path_to_the_KUBECONFIG_file flag
3 You combine those above with kubectl config --kubeconfig=XXXX use-context xxxx
Please follow Define clusters, users, and contexts
Hope this help.