With you can backup VMs or container to the Proxmox Backup Server and restore them from there if needed. Additionally, you can use the proxmox-backup-client
, a CLI utility to backup/restore arbitrary directories from a node.
There is no possibility yet to backup a whole Proxmox VE host including its configuration (although you could use the backup client to regularly backup the /etc/pve directory, which is arguably the most important part of a PVE host to back up)