MicroK8s : Add Nodes2023/06/22

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/f99f1625c1b0d0ca7601a63cf9d6fba5/ff0519fe1876

Use the '--worker' flag to join a node as a worker not running the control plane, eg:
microk8s join 10.0.0.30:25000/f99f1625c1b0d0ca7601a63cf9d6fba5/ff0519fe1876 --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/f99f1625c1b0d0ca7601a63cf9d6fba5/ff0519fe1876

[2]	On a new Node, Install MicroK8s and join in Cluster.

root@node01:~#

snap install microk8s --classic

microk8s (1.27/stable) v1.27.2 from Canonical✓ installed

# run the command confirmed in [1]

root@node01:~#

microk8s join 10.0.0.30:25000/f99f1625c1b0d0ca7601a63cf9d6fba5/ff0519fe1876

Contacting cluster at 10.0.0.30
Waiting for this node to finish joining the cluster. .. .. .. ..

[3]	After a few minutes on primary Node, Make sure a new Node has been added in Cluster.

root@dlp:~#

microk8s kubectl get nodes

NAME               STATUS   ROLES    AGE   VERSION
node01.srv.world   Ready    <none>   86s   v1.27.2
dlp.srv.world      Ready    <none>   18m   v1.27.2

[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>   20m   v1.27.2

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