[root@xgto01n010243186070 ~]# virsh domblklist instance-

Target     Source

------------------------------------------------

vda        /os_instance/026deca9-64a9-4cb4-830d-6806356be1bb/disk

[root@xgto01n010243186070 ~]# vgdisplay

  --- Volume group ---

  VG Name               vg_os

  System ID

  Format                lvm2

  Metadata Areas

  Metadata Sequence No

  VG Access             read/write

  VG Status             resizable

  MAX LV

  Cur LV

  Open LV

  Max PV

  Cur PV

  Act PV

  VG Size               4.04 TiB

  PE Size               4.00 MiB

  Total PE

  Alloc PE / Size        / 3.24 TiB

  Free  PE / Size        / 813.12 GiB

  VG UUID               Dgvra8-axy2-H6iR-KQKN-t1hL-L89y-6ONv6l 

[root@xgto01n010243186070 ~]# lvcreate -n test36 -L 1.5 vg_os

  Rounding up size to full physical extent 4.00 MiB

  Logical volume "test36" created.

[root@xgto01n010243186070 ~]# lvdisplay |grep test36

  LV Path                /dev/vg_os/test36

  LV Name                test36

virsh attach-disk instance- /dev/vg_os/test36 vdb --driver qemu --mode shareable

[root@xgto01n010243186070 ~]# virsh domblklist instance-

Target     Source

------------------------------------------------

vda        /os_instance/026deca9-64a9-4cb4-830d-6806356be1bb/disk

vdb        /dev/vg_os/test36

virsh detach-disk <domain> <target> [--persistent] [--config] [--live] [--current]

virsh detach-disk  instance-  vdb

[root@xgto01n010243186070 ~]# virsh detach-disk  instance-  vdb

Disk detached successfully

[root@xgto01n010243186070 ~]# virsh domblklist instance-

Target     Source

------------------------------------------------

vda        /os_instance/026deca9-64a9-4cb4-830d-6806356be1bb/disk

[root@xgto01n010243186070 ~]# lvremove /dev/vg_os/test36

Do you really want to remove active logical volume vg_os/test36? [y/n]: y

  Logical volume "test36" successfully removed

[root@xgto01n010243186070 ~]# lvdisplay |grep test36