CODEWITHSUNDEEP
cluster-computingkubernetes
adyanthaya17
adyanthaya17

Reputation: 317

Adding node to existing cluster in Kubernetes

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.

Upvotes: 30

Views: 49356

Answers (3)

Alex
Alex

Reputation: 81

In my case the issue was due to an existing wront Route53 "A" record. Once it's been updated to point to internal IPs of API servers, kube-proxy was able to reach the masters and the node appeared in the list (kubectl get nodes).

Upvotes: 0

Tom Dierckx
Tom Dierckx

Reputation: 686

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

Upvotes: 41

Maxim Filatov
Maxim Filatov

Reputation: 952

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

Upvotes: 12

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