Configure kubectl Credentials to Access the Kubernetes APIs

The credentials for kubectl are located in the admin configuration file on all non-compute node (NCN) master and worker nodes. They can be found at /etc/kubernetes/admin.conf for the root user. Use kubectl to access the Kubernetes cluster from a device outside the cluster.

For more information, refer to the Kubernetes home page.

Prerequisites

This procedure requires administrative privileges and assumes that the device being used has:

  • kubectl is installed
  • Access to the site admin network

Procedure

  1. Access the credentials file used by kubectl at /etc/kubernetes/admin.conf on any one of the master or worker NCNs.

    If copying this file to another system, be sure to set the environmental variable KUBECONFIG to the new location on that system.

  2. Verify access by executing the following command:

    ncn# kubectl get nodes

    Successful output will resemble the following:

    NAME       STATUS   ROLES    AGE   VERSION
ncn-m001   Ready    master   23h   v1.14.3
ncn-m002   Ready    master   23h   v1.14.3
ncn-m003   Ready    master   23h   v1.14.3
ncn-w001   Ready    <none>   23h   v1.14.3
ncn-w002   Ready    <none>   23h   v1.14.3
ncn-w003   Ready    <none>   23h   v1.14.3