How to create a kubectl config file for serviceaccount
# your server name goes here
server=https://localhost:8443
# the name of the secret containing the service account token goes here
name=default-token-sg96k
ca=$(kubectl get secret/$name -o jsonpath='{.data.ca\.crt}')
token=$(kubectl get secret/$name -o jsonpath='{.data.token}' | base64 --decode)
namespace=$(kubectl get secret/$name -o jsonpath='{.data.namespace}' | base64 --decode)
echo "
apiVersion: v1
kind: Config
clusters:
- name: default-cluster
cluster:
certificate-authority-data: ${ca}
server: ${server}
contexts:
- name: default-context
context:
cluster: default-cluster
namespace: default
user: default-user
current-context: default-context
users:
- name: default-user
user:
token: ${token}
" > sa.kubeconfig
I cleaned up Jordan Liggitt's script a little.
Unfortunately I am not yet allowed to comment so this is an extra answer:
# The script returns a kubeconfig for the service account given
# you need to have kubectl on PATH with the context set to the cluster you want to create the config for
# Cosmetics for the created config
clusterName=some-cluster
# your server address goes here get it via `kubectl cluster-info`
server=https://157.90.17.72:6443
# the Namespace and ServiceAccount name that is used for the config
namespace=kube-system
serviceAccount=developer
######################
# actual script starts
set -o errexit
secretName=$(kubectl --namespace $namespace get serviceAccount $serviceAccount -o jsonpath='{.secrets[0].name}')
ca=$(kubectl --namespace $namespace get secret/$secretName -o jsonpath='{.data.ca\.crt}')
token=$(kubectl --namespace $namespace get secret/$secretName -o jsonpath='{.data.token}' | base64 --decode)
echo "
---
apiVersion: v1
kind: Config
clusters:
- name: ${clusterName}
cluster:
certificate-authority-data: ${ca}
server: ${server}
contexts:
- name: ${serviceAccount}@${clusterName}
context:
cluster: ${clusterName}
namespace: ${namespace}
user: ${serviceAccount}
users:
- name: ${serviceAccount}
user:
token: ${token}
current-context: ${serviceAccount}@${clusterName}
"