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Networking
Our cluster will need a networking layer for the pods to communicate on. Note that kubeadm requires a CNI compatible network fabric. The list of plugins currently available can be found here:
http://kubernetes.io/docs/admin/addons/
For our example, we will use calico. We will need to create the calico components on our cluster using the following yaml. For convenience you can download it here:
Once you have this file on your master, create the components with the following command:
$ kubectl apply -f calico.yaml
Give this a minute to run setup and then list the kube-system nodes to check:
$ kubectl get pods --namespace=kube-system
You should get a listing similar to the following one with three new calico pods and one completed job that is not shown:
Calico setup