Configuring a backup storage
All backups must be stored on a separate node configured for backup purposes only. If backups are stored on the same Proxmox node, during hardware failure, it will not be possible to restore VMs for a damaged node. There are different options to set up a backup node. The most popular option is to set up a node with an NFS share to store backups. In enterprise or a mission-critical environment, a backup node cluster is common with redundancy. In smaller environments, good redundancy can still be achieved by using options, such as Gluster or DRBD. With the addition of ZFS and Gluster in the Proxmox VE, it is also a viable option to turn a Proxmox node into a backup node by using Gluster with ZFS.
Refer to Chapter 6, Storage Configurations, for different storage options available and steps on how to set up these storages. The advantage of using a Proxmox node as a backup node is the ability to monitor the node along with rest of the nodes in the cluster.
