Change Hostnames

CHANGE KUBERNETES

Warning: Whenever you teardown the cluster be sure to back up your data first.

To change a node's hostname, you must teardown your Kubernetes cluster.

sevone-cli cluster down

Run the following command on every node to change their hostname.
Example
```
sudo hostnamectl set-hostname "sdi-node01"
```
On the control plane node, update /etc/ansible/hosts with your new hostname.
Example
```
[server]
sdi-node01 ansible_connection=local
```

If you have agent nodes, update their hostnames as well.
Example

[server]
sdi-node01 ansible_connection=local

[agent]
sdi-node02 ansible_host=10.123.45.68
sdi-node03 ansible_host=10.123.45.69

Warning: If you have torn down a running cluster, after executing the command below, you must restore your data first.

sevone-cli cluster up