MicroK8s : Add Nodes2021/08/30

If you'd like to add more Nodes to your MicroK8s Cluster, Configure like follows.

[1]	Display 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 10.0.0.30:25000/695fca9d436fdee295792f85d3c2852b/e2906e671efc

If the node you are adding is not reachable through the default interface you can use one of the following:
 microk8s join 10.0.0.30:25000/695fca9d436fdee295792f85d3c2852b/e2906e671efc

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

root@node01:~#

apt -y install snapd sudo

root@node01:~#

echo 'export PATH=/snap/bin:$PATH' >> ~/.bashrc

root@node01:~#

source ~/.bashrc

root@node01:~#

snap install microk8s --classic

microk8s (1.21/stable) v1.21.3 from Canonical✓ installed

# run the command confirmed in [1]

root@node01:~#

microk8s join 10.0.0.30:25000/695fca9d436fdee295792f85d3c2852b/e2906e671efc

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>   27m   v1.21.3-3+90fd5f3d2aea0a
node01.srv.world   Ready    <none>   91s   v1.21.3-3+90fd5f3d2aea0a

[4]	To remove a Node, Set like follows.

# on removal target node, run like follows

root@node01:~#

microk8s leave

Generating new cluster certificates.
Waiting for node to start.

# on primary node, run like follows

# specify Node name and run [remove-node]

# if remove forcely, add [--force] option

root@dlp:~#

microk8s remove-node node01.srv.world

root@dlp:~#

microk8s kubectl get nodes

NAME            STATUS   ROLES    AGE   VERSION
dlp.srv.world   Ready    <none>   30m   v1.21.3-3+90fd5f3d2aea0a

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