Adding node to existing cluster in Kubernetes

Question

I have a kubernetes cluster running on 2 machines (master-minion node and minion node). I want to add a new minion node without disrupting the current set up, is there a way to do it?

I have seen that when I try to add the new node, the services on the other nodes stops it, due to which I have to stop the services before deploying the new node to the existing cluster.

Answer 1

To do this in the latest version (tested on 1.10.0) you can issue following command on the masternode:

kubeadm token create --print-join-command

It will then print out a new join command (like the one you got after kubeadmn init):

kubeadm join 192.168.1.101:6443 --token tokentoken.lalalalaqyd3kavez --discovery-token-ca-cert-hash sha256:complexshaoverhere

Answer 2

You need to run kubelet and kube-proxy on a new minion indicating api address in params.

Example:

kubelet --api_servers=http://<API_SERVER_IP>:8080 --v=2 --enable_server --allow-privileged
kube-proxy --master=http://<API_SERVER_IP>:8080 --v=2

After this you should see new node in

kubectl get no