Mastering Kubernetes - Second Edition

Registering Kubernetes clusters with the federation

To register a cluster with the federation, we need a secret to talk to the cluster. Let's create the secret in the host Kubernetes cluster. Suppose kubeconfig of the target cluster is at |cluster-1|kubeconfig. You can run the following command to create the secret:

> kubectl create secret generic cluster-1 --namespace=federation    
--from-file=/cluster-1/kubeconfig  

The configuration for the cluster looks the same as this:

apiVersion: federation/v1beta1 
kind: Cluster 
metadata: 
  name: cluster1 
spec: 
  serverAddressByClientCIDRs: 
  - clientCIDR: <client-cidr> 
    serverAddress: <apiserver-address> 
  secretRef: 
    name: <secret-name> 

We need to set <client-cidr>, <apiserver-address>, and <secret-name>.