generate key

openssl genrsa -out developer.key 2048

generate csr

openssl req -new -key developer.key -out developer.csr -subj "/CN=developer/O=developer"

generate certificate developer.crt

openssl x509 -req -in developer.csr -CA /var/snap/microk8s/current/certs/ca.crt -CAkey /var/snap/microk8s/current/certs/ca.key -CAcreateserial -out developer.crt -days 500

set credential

kubectl config set-credentials developer
--client-certificate=developer.crt
--client-key=developer.key

list config

kubectl config view kubectl config current-context

create contex

kubectl config set-context developer --cluster=microk8s-cluster --user=developer

switch user / contex

kubectl config use-context developer