openstack/manila
Code Issues Proposed changes
c36c8a5e62
manila/doc/source/configuration/shared-file-systems/drivers/lvm-driver.rst
Tom Barron fae499cb73 doc migration: configuration reference 
In accord with the OpenStack documentation migration spec [1],
this patch pulls over material from the centralized Configuration
Reference so that it will not be lost.  As indicated in the spec,
dynamic generation of this material will be left for later work.

[1] https://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html

Closes-Bug: #1706181
Depends-On: Ib0fca0c16e14c05307bfc31ae50c65271b7402f1
Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454

Change-Id: I7f3b584ac9907da1f07dedd26324cf4703bc7e6c
2017-08-25 13:21:08 +00:00

2.3 KiB
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LVM share driver

The Shared File Systems service can be configured to use LVM share driver. LVM share driver relies solely on LVM running on the same host with manila-share service. It does not require any services not related to the Shared File Systems service to be present to work.

Prerequisites

The following packages must be installed on the same host with manila-share service:

  • NFS server
  • Samba server >= 3.2.0
  • LVM2 >= 2.02.66

Services must be up and running, ports used by the services must not be blocked. A node with manila-share service should be accessible to share service users.

LVM should be preconfigured. By default, LVM driver expects to find a volume group named lvm-shares. This volume group will be used by the driver for share provisioning. It should be managed by node administrator separately.

Shared File Systems service driver configuration setting

To use the driver, one should set up a corresponding back end. A driver must be explicitly specified as well as export IP address. A minimal back-end specification that will enable LVM share driver is presented below:

[LVM_sample_backend]
driver_handles_share_servers = False
share_driver = manila.share.drivers.lvm.LVMShareDriver
lvm_share_export_ip = 1.2.3.4

In the example above, lvm_share_export_ip is the address to be used by clients for accessing shares. In the simplest case, it should be the same as host's address.

Supported shared file systems and operations

The driver supports CIFS and NFS shares.

The following operations are supported:

  • Create a share.

  • Delete a share.

  • Allow share access.

    Note the following limitations:

    • Only IP access type is supported for NFS.

  • Deny share access.

  • Create a snapshot.

  • Delete a snapshot.

  • Create a share from a snapshot.

  • Extend a share.

Known restrictions

  • LVM driver should not be used on a host running Neutron agents, simultaneous usage might cause issues with share deletion (shares will not get deleted from volume groups).

Driver options

The following table contains the configuration options specific to this driver.