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Configuring the Kubernetes Client - Remote Access

Download and Install kubectl

OS X

wget https://storage.googleapis.com/kubernetes-release/release/v1.4.0/bin/darwin/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin

Linux

wget https://storage.googleapis.com/kubernetes-release/release/v1.4.0/bin/linux/amd64/kubectl
chmod +x kubectl
sudo mv kubectl /usr/local/bin

Configure Kubectl

In this section you will configure the kubectl client to point to the Kubernetes API Server Frontend Load Balancer.

GCE

KUBERNETES_PUBLIC_ADDRESS=$(gcloud compute addresses describe kubernetes \
  --format 'value(address)')

AWS

KUBERNETES_PUBLIC_ADDRESS=$(aws elb describe-load-balancers \
  --load-balancer-name kubernetes | \
  jq -r '.LoadBalancerDescriptions[].DNSName')

#OpenStack

KUBERNETES_PUBLIC_ADDRESS=$(openstack server show controller0 -f shell |grep addresses | awk '{print $2}'| sed 's/"$//')

Recall the token we setup for the admin user:

# /var/lib/kubernetes/token.csv on the controller nodes
chAng3m3,admin,admin

Also be sure to locate the CA certificate created earlier. Since we are using self-signed TLS certs we need to trust the CA certificate so we can verify the remote API Servers.

Build up the kubeconfig entry

The following commands will build up the default kubeconfig file used by kubectl.

kubectl config set-cluster kubernetes-the-hard-way \
  --certificate-authority=ca.pem \
  --embed-certs=true \
  --server=https://${KUBERNETES_PUBLIC_ADDRESS}:6443

kubectl config set-credentials admin --token chAng3m3

kubectl config set-context default-context \
  --cluster=kubernetes-the-hard-way \
  --user=admin

kubectl config use-context default-context

At this point you should be able to connect securly to the remote API server:

kubectl get componentstatuses

NAME                 STATUS    MESSAGE              ERROR
controller-manager   Healthy   ok                   
scheduler            Healthy   ok                   
etcd-2               Healthy   {"health": "true"}   
etcd-0               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}

kubectl get nodes

NAME      STATUS    AGE
worker0   Ready     7m
worker1   Ready     5m
worker2   Ready     2m

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