Ubuntu 22.04
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MicroK8s : Add Nodes
2022/09/02
 
If you'd like to add more Nodes to your MicroK8s Cluster, Configure like follows.
[1] Make sure commands to join in Cluster on primary Node.
root@dlp:~#
microk8s add-node

From the node you wish to join to this cluster, run the following:
microk8s join 10.0.0.30:25000/e604a9a0d1f6761fc9bc9aa6e1d19b99/6c4dceea330e

Use the '--worker' flag to join a node as a worker not running the control plane, eg:
microk8s join 10.0.0.30:25000/e604a9a0d1f6761fc9bc9aa6e1d19b99/6c4dceea330e --worker

If the node you are adding is not reachable through the default interface you can use one of the following:
microk8s join 10.0.0.30:25000/e604a9a0d1f6761fc9bc9aa6e1d19b99/6c4dceea330e
[2] On a new Node, Install MicroK8s and join in Cluster.
root@node01:~#
snap install microk8s --classic

microk8s (1.24/stable) v1.24.3 from Canonical✓ installed
# run the command confirmed in [1]

root@node01:~#
microk8s join 10.0.0.30:25000/e604a9a0d1f6761fc9bc9aa6e1d19b99/6c4dceea330e

Contacting cluster at 10.0.0.30
Waiting for this node to finish joining the cluster. .. .. .. ..
[3] On primary Node, Make sure a new Node has been added in Cluster.
root@dlp:~#
microk8s kubectl get nodes

NAME               STATUS   ROLES    AGE   VERSION
dlp.srv.world      Ready    <none>   22m   v1.24.3-2+63243a96d1c393
node01.srv.world   Ready    <none>   88s   v1.24.3-2+63243a96d1c393
[4] To remove a Node, Set like follows.
# leave from cluster on the target node first

root@node01:~#
microk8s leave

Generating new cluster certificates. Waiting for node to start.
# on primary node, remove the target node

root@dlp:~#
microk8s remove-node node01.srv.world
root@dlp:~#
microk8s kubectl get nodes

NAME               STATUS   ROLES    AGE    VERSION
dlp.srv.world      Ready    <none>   199m   v1.24.3-2+63243a96d1c393
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