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12.4.3. Creating an LVM-based Storage Pool with virsh
This section outlines the steps required to create an LVM-based storage pool with the
virsh command. It uses the example of a pool named guest_images_lvm from a single drive (/dev/sdc). This is only an example and your settings should be substituted as appropriate.
Procedure 12.3. Creating an LVM-based storage pool with virsh
- Define the pool name guest_images_lvm.
# virsh pool-define-as guest_images_lvm logical - - /dev/sdc libvirt_lvm \ /dev/libvirt_lvm Pool guest_images_lvm defined
- Build the pool according to the specified name. If you are using an already existing volume group, skip this step.
# virsh pool-build guest_images_lvm Pool guest_images_lvm built
- Initialize the new pool.
# virsh pool-start guest_images_lvm Pool guest_images_lvm started
- Show the volume group information with the
vgscommand.# vgs VG #PV #LV #SN Attr VSize VFree libvirt_lvm 1 0 0 wz--n- 465.76g 465.76g
- Set the pool to start automatically.
# virsh pool-autostart guest_images_lvm Pool guest_images_lvm marked as autostarted
- List the available pools with the
virshcommand.# virsh pool-list --all Name State Autostart ----------------------------------------- default active yes guest_images_lvm active yes
- The following commands demonstrate the creation of three volumes (volume1, volume2 and volume3) within this pool.
# virsh vol-create-as guest_images_lvm volume1 8G Vol volume1 created # virsh vol-create-as guest_images_lvm volume2 8G Vol volume2 created # virsh vol-create-as guest_images_lvm volume3 8G Vol volume3 created
- List the available volumes in this pool with the
virshcommand.# virsh vol-list guest_images_lvm Name Path ----------------------------------------- volume1 /dev/libvirt_lvm/volume1 volume2 /dev/libvirt_lvm/volume2 volume3 /dev/libvirt_lvm/volume3
- The following two commands (
lvscanandlvs) display further information about the newly created volumes.# lvscan ACTIVE '/dev/libvirt_lvm/volume1' [8.00 GiB] inherit ACTIVE '/dev/libvirt_lvm/volume2' [8.00 GiB] inherit ACTIVE '/dev/libvirt_lvm/volume3' [8.00 GiB] inherit # lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert volume1 libvirt_lvm -wi-a- 8.00g volume2 libvirt_lvm -wi-a- 8.00g volume3 libvirt_lvm -wi-a- 8.00g
