Proxmox: resize disk in LXC container

  1. Shutdown container.
  2. Resize disk with GUI:
    select machine, click Resources, select Disk and click Resize Disk
    or
  3. Resize disk with console:
    pct resize <vmid> <disk> <size> [OPTIONS]
  4. On Proxmox machine in console:
    e2fsck -fy /dev/pve/vm-<vmid>-disk-x
    resize2fs /dev/pve/vm-<vmid>-disk-x
  5. Sometimes you will need to:
    tune2fs -f -E clear_mmp /dev/pve/vm-<vmid>-disk-x