2. Create the LVM physical volume ``/dev/sdc``: .. code-block:: console # pvcreate /dev/sdc Physical volume "/dev/sdc" successfully created #. Create the LVM volume group ``manila-volumes``: .. code-block:: console # vgcreate manila-volumes /dev/sdc Volume group "manila-volumes" successfully created The Shared File Systems service creates logical volumes in this volume group. #. Only instances can access Shared File Systems service 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`` and ``manila-volumes`` volume groups. Edit the ``/etc/lvm/lvm.conf`` file and complete the following actions: * In the ``devices`` section, add a filter that accepts the ``/dev/sdb`` and ``/dev/sdc`` devices and rejects all other devices: .. code-block:: ini devices { ... filter = [ "a/sdb/", "a/sdc", "r/.*/"] .. warning:: If your storage nodes use LVM on the operating system disk, you must also add the associated device to the filter. For example, if the ``/dev/sda`` device contains the operating system: .. code-block:: ini filter = [ "a/sda/", "a/sdb/", "a/sdc", "r/.*/"] Similarly, if your compute nodes use LVM on the operating system disk, you must also modify the filter in the ``/etc/lvm/lvm.conf`` file on those nodes to include only the operating system disk. For example, if the ``/dev/sda`` device contains the operating system: .. code-block:: ini filter = [ "a/sda/", "r/.*/"] Configure components -------------------- #. Edit the ``/etc/manila/manila.conf`` file and complete the following actions: * In the ``[DEFAULT]`` section, enable the LVM driver and the NFS protocol: .. code-block:: ini [DEFAULT] ... enabled_share_backends = lvm enabled_share_protocols = NFS .. note:: Back end names are arbitrary. As an example, this guide uses the name of the driver. * In the ``[lvm]`` section, configure the LVM driver: .. code-block:: ini [lvm] share_backend_name = LVM share_driver = manila.share.drivers.lvm.LVMShareDriver driver_handles_share_servers = False lvm_share_volume_group = manila-volumes lvm_share_export_ip = MANAGEMENT_INTERFACE_IP_ADDRESS Replace ``MANAGEMENT_INTERFACE_IP_ADDRESS`` with the IP address of the management network interface on your storage node, typically 10.0.0.41 for the first node in the example architecture shown below: .. figure:: figures/hwreqs.png :alt: Hardware requirements **Hardware requirements**.