LXC

pct set <VMID> --hostname <newname>

# pveam - Proxmox VE Appliance Manager
pveam update

It is not supported. Command

pct resize <VMID> rootfs <newsize>

cannot be used.

Workaround 1:

• Stop container
• Edit <vmid>conf and set new disk size
• Perform backup
• Restore LXC from backup

Workaround 2:

• Change ZFS volume size

  zfs set refquota=8G rpool/data/subvol-810-disk-0

• Adjust LXC config:
  • Edit <vmid>conf and set new disk size, OR
  • pct rescan