Libvirt blockresize¶

host: # lvresize -L +44g mirror/kvm602-guest-storage

Using stripesize of last segment 64.00 KiB
Extending logical volume kvm602-guest-storage to 92.00 GiB
Logical volume kvm602-guest-storage successfully resized

host: # lvs --units k mirror/kvm602-guest-storage

  LV                       VG     Attr   LSize
  kvm602-guest-storage     mirror -wi-ao 96468992.00k

host:~# virsh

Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # list

virsh # list
 Id    Name                           State
----------------------------------------------------
...
 7     kvm602-guest                   running
...

virsh # domblklist kvm602-guest

Target     Source
------------------------------------------------
vda        /dev/mirror/kvm602-guest-root
vdb        /dev/mirror/kvm602-guest-storage

virsh # blockresize kvm602-work-backup --path /dev/mirror/kvm602-guest-storage --size 96468992

Block device '/dev/mirror/kvm602-work-storage' is resized

Смотрим, чтобы ядро было старше 3.0

guest # uname -r

3.2.0-0.bpo.4-amd64

guest # dmesg |tail

[838729.810179] vdb: detected capacity change from 51539607552 to 98784247808

guest # blockdev --rereadpt /dev/vdb

guest # pvresize /dev/vdb

  Physical volume "/dev/vdb" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized