Adding nodes to a cluster
After the cluster is created, we have to add additional nodes to complete the cluster role. A Proxmox cluster requires a minimum of three nodes for proper cluster creation. With three nodes, a quorum is possible, which allows clusters to be online and function properly. It is also possible to create a cluster with only two nodes, but it's not recommended. With only two nodes, a majority vote is not possible for cluster election. For learning purposes or for a very small virtual environment, a two node cluster is an option.
Getting ready
The task of adding nodes also needs to be accomplished through the CLI. As of Proxmox VE 3.4, it is not possible to add nodes to a cluster through the Proxmox GUI. Check to ensure that the time and date are synchronized between nodes. The process of cluster creation uses the cryptograph method, and it is important that all nodes have same time and date.
How to do it…
Use the following steps, to add nodes to a cluster:
Log in as the root...
