astriaorg / gke-auth-plugin

A GKE standalone auth plugin, with no dependencies on gcloud cli and python.

GKE Authentication Plugin

This plugin provides a standalone way to generate an ExecCredential for use by k8s.io/client-go applications.

Google already provides a gke-gcloud-auth-plugin; however, that plugin depends on the gcloud CLI, which is written in Python. This dependency graph is Large if you want to authenticate and interact with a GKE cluster from a go application.

The plugin is for use outside of a cluster; when running in the cluster, mount a service account and use that token to interact with the Kubernetes API.

Build

make

Or with Docker:

docker build -f Dockerfile.dev -t gke-auth-plugin-dev .

docker run -it --rm --name gke-auth-plugin-dev-container -v ${PWD}:/home/nonroot gke-auth-plugin-dev

make

Run

# generate ExecCredential
bin/gke-auth-plugin

# version
bin/gke-auth-plugin version

You can straight up replace the gke-gcloud-auth-plugin with this binary, or place on your path and update your kubeconfig exec command to run gke-auth-plugin.

Example Exec Section of Kubeconfig

users:
- name: user_id
  user:
    exec:
      apiVersion: client.authentication.k8s.io/v1beta1
      command: gke-auth-plugin
      provideClusterInfo: true
      interactiveMode: Never

TODO

• Add unit tests