This example shows you how to configure a client with client-go to authenticate to the Kubernetes API from an application running outside the Kubernetes cluster.
You can use your kubeconfig file that contains the context information of your cluster to initialize a client. The kubeconfig file is also used by the kubectl
command to authenticate to the clusters.
Make sure your kubectl
is configured and pointed to a cluster. Run kubectl get nodes
to confirm.
Run this application with:
cd out-of-cluster-client-configuration go build -o app . ./app
Running this application will use the kubeconfig file and then authenticate to the cluster, and print the number of pods in the cluster every 10 seconds:
./app There are 3 pods in the cluster There are 3 pods in the cluster There are 3 pods in the cluster ...
Press Ctrl+C to quit this application.
Note: You can use the
-kubeconfig
option to use a different config file. By default this program picks up the default file used by kubectl (whenKUBECONFIG
environment variable is not set).