I recommend the use of kubelogin.

Provides out of band OpenID Connect support. This project has only be tested with Dex

Download the binary from the release page

• k8s-auth NAME - Authenticates to the provider and writes out the kubernetes config

Create a file $HOME/.k8s-auth.yaml

Example for dex deployed at dex.dev.example.com with kops as the server located at api.internal.dev.example.com

dev:
  issuer: https://dex.dev.example.com
  server: https://api.internal.dev.example.com
  insecureSkipTLSVerify: true

Multiple configurations can be stored in a single file.

The work for this originally started from https://github.com/coreos/dex/tree/master/cmd/example-app