Remove nodes

You may want to remove master, worker, or etcd nodes from your existing cluster. This can be done by running the remove-node.yml playbook. First, all specified nodes will be drained, then stop some kubernetes services and delete some certificates, and finally execute the kubectl command to delete these nodes. Use --extra-vars flag to select the node(s) you want to delete

# If you don't remember them, find the node names in the inventory/mycluster/hosts.yml file
$ ansible-playbook -i inventory/mycluster/hosts.yaml -b remove-node.yml --extra-vars "node=<node1>,<node2>"

Once the deletion process is finished, remember to delete the node from the inventory file.

Cleanup

You can reset your nodes and wipe out all components installed with Kubespray via the reset.yml playbook. In general, it is recommended that you have a look at the inventory file before launching a playbook. It is possible that there are nodes left inside it, but no longer part of the cluster because, for example, they were previously deleted. In other words, the nodes belonging to the cluster must match those present in the inventory.

Adding nodes

You may want to add worker, master or etcd nodes to your existing cluster. This can be done by re-running the cluster.yml playbook, after adding a new node in the inventory file.