Join Nodes to a Cluster
Joining from Web GUI
If you haven’t already, to create a Cluster go to Datacenter → Cluster → Create Cluster from the master node (e.g.: pve01.local).
On a Peer node go to (Datacenter → Cluster → Join Cluster) with the data/key copied from the sub-menu “Join Information” on the Master Node and root password.
You can now login from any node on the Cluster, be sure to maintain quorum to keep VMs “alive”.
To manually join nodes to the cluster enter the following on a terminal:
$ pvecm add (target ring0 address)
It will ask for the password from the first node in the PVE Cluster.