How to create a storage pool#
LXD creates a storage pool during initialization. You can add more storage pools later, using the same driver or different drivers.
To create a storage pool, use the following command:
lxc storage create <pool_name> <driver> [configuration_options...]
See the Storage drivers documentation for a list of available configuration options for each driver.
Examples#
See the following examples for how to create a storage pool using different storage drivers.
Create a directory pool named pool1
:
lxc storage create pool1 dir
Use the existing directory /data/lxd
for pool2
:
lxc storage create pool2 dir source=/data/lxd
Create a loop-backed pool named pool1
:
lxc storage create pool1 btrfs
Use the existing Btrfs file system at /some/path
for pool2
:
lxc storage create pool2 btrfs source=/some/path
Create a pool named pool3
on /dev/sdX
:
lxc storage create pool3 btrfs source=/dev/sdX
Create a loop-backed pool named pool1
(the LVM volume group will also be called pool1
):
lxc storage create pool1 lvm
Use the existing LVM volume group called my-pool
for pool2
:
lxc storage create pool2 lvm source=my-pool
Use the existing LVM thin pool called my-pool
in volume group my-vg
for pool3
:
lxc storage create pool3 lvm source=my-vg lvm.thinpool_name=my-pool
Create a pool named pool4
on /dev/sdX
(the LVM volume group will also be called pool4
):
lxc storage create pool4 lvm source=/dev/sdX
Create a pool named pool5
on /dev/sdX
with the LVM volume group name my-pool
:
lxc storage create pool5 lvm source=/dev/sdX lvm.vg_name=my-pool
Create a loop-backed pool named pool1
(the ZFS zpool will also be called pool1
):
lxc storage create pool1 zfs
Create a loop-backed pool named pool2
with the ZFS zpool name my-tank
:
lxc storage create pool2 zfs zfs.pool_name=my-tank
Use the existing ZFS zpool my-tank
for pool3
:
lxc storage create pool3 zfs source=my-tank
Use the existing ZFS data set my-tank/slice
for pool4
:
lxc storage create pool4 zfs source=my-tank/slice
Create a pool named pool5
on /dev/sdX
(the ZFS zpool will also be called pool5
):
lxc storage create pool1 zfs source=/dev/sdX
Create a pool named pool6
on /dev/sdX
with the ZFS zpool name my-tank
:
lxc storage create pool6 zfs source=/dev/sdX zfs.pool_name=my-tank
Create an OSD storage pool named pool1
in the default Ceph cluster (named ceph
):
lxc storage create pool1 ceph
Create an OSD storage pool named pool2
in the Ceph cluster my-cluster
:
lxc storage create pool2 ceph ceph.cluster_name=my-cluster
Create an OSD storage pool named pool3
with the on-disk name my-osd
in the default Ceph cluster:
lxc storage create pool3 ceph ceph.osd.pool_name=my-osd
Use the existing OSD storage pool my-already-existing-osd
for pool4
:
lxc storage create pool4 ceph source=my-already-existing-osd
Use the existing OSD erasure-coded pool ecpool
and the OSD replicated pool rpl-pool
for pool5
:
lxc storage create pool5 ceph source=rpl-pool ceph.osd.data_pool_name=ecpool
Create a storage pool named pool1
in the default Ceph cluster (named ceph
):
lxc storage create pool1 cephfs
Create a storage pool named pool2
in the Ceph cluster my-cluster
:
lxc storage create pool2 cephfs cephfs.cluster_name=my-cluster
Use the existing storage pool my-filesystem
for pool3
:
lxc storage create pool3 cephfs source=my-filesystem
Use the sub-directory my-directory
from the my-filesystem
pool for pool4
:
lxc storage create pool4 cephfs source=my-filesystem/my-directory
Create a storage pool in a cluster#
If you are running a LXD cluster and want to add a storage pool, you must create the storage pool for each cluster member separately. The reason for this is that the configuration, for example, the storage location or the size of the pool, might be different between cluster members.
Therefore, you must first create a pending storage pool on each member with the --target=<cluster_member>
flag and the appropriate configuration for the member.
Make sure to use the same storage pool name for all members.
Then create the storage pool without specifying the --target
flag to actually set it up.
For example, the following series of commands sets up a storage pool with the name my-pool
at different locations and with different sizes on three cluster members:
lxc storage create my-pool zfs source=/dev/sdX size=10GB --target=vm01
lxc storage create my-pool zfs source=/dev/sdX size=15GB --target=vm02
lxc storage create my-pool zfs source=/dev/sdY size=10GB --target=vm03
lxc storage create my-pool zfs
Note
For most storage drivers, the storage pools exist locally on each cluster member. That means that if you create a storage volume in a storage pool on one member, it will not be available on other cluster members.
This behavior is different for Ceph-based storage pools (ceph
and cephfs
) where each storage pool exists in one central location and therefore, all cluster members access the same storage pool with the same storage volumes.