cinder's back-end LVM driver

Create the LVM physical volume /dev/sdb1:
# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created

Create the LVM volume group cinder-volumes:
# vgcreate cinder-volumes /dev/sdb1
Volume group "cinder-volumes" successfully created
show the physical volume
#pvdisplay


Only instances can access Block Storage volumes. However, the underlying operating
system manages the devices associated with the volumes. By default, the LVM volume
scanning tool scans the /dev directory for block storage devices that contain volumes.
If projects use LVM on their volumes, the scanning tool detects these volumes and attempts
to cache them which can cause a variety of problems with both the underlying
operating system and project volumes. You must reconfigure LVM to scan only
the devices that contain the cinder-volume volume group. Edit the /etc/lvm/
lvm.conf file and complete the following actions


In the devices section, add a filter that accepts the /dev/sdb device and rejects
all other devices:
devices {
...
filter = [ "a/sdb/", "r/.*/"]
Each item in the filter array begins with a for accept or r for reject and includes a
regular expression for the device name. The array must end with r/.*/ to reject
any remaining devices. You can use the vgs -vvvv command to test filters