# Collocated Databases

The easiest way to gain higher availability is to use the **kubeadm** command and join at least two more cp servers to the cluster. The command is almost the same as a worker join except an additional **--control-plane** flag and a **certificate-key**. The key will probably need to be generated unless the other cp nodes are added within two hours of the cluster initialization.

Should a node fail, you would lose both a control plane and a database. As the database is the one object that cannot be rebuilt, this may not be an important issue.
