mirror of
https://github.com/ceph/ceph
synced 2024-12-22 03:22:00 +00:00
60 lines
1.6 KiB
ReStructuredText
60 lines
1.6 KiB
ReStructuredText
==============================
|
|
RBD Kernel Object Operations
|
|
==============================
|
|
|
|
.. important:: To use kernel object operations, you must have a running Ceph cluster.
|
|
|
|
Load the Ceph RBD Module
|
|
========================
|
|
|
|
To map an RBD image to a kernel object, first load the Ceph RBD module::
|
|
|
|
modprobe rbd
|
|
|
|
Get a List of RBD Images
|
|
========================
|
|
|
|
To mount an RBD image, first return a list of the images. ::
|
|
|
|
rbd list
|
|
|
|
Map a Block Device
|
|
==================
|
|
|
|
Use ``rbd`` to map an image name to a kernel object. You must specify the
|
|
image name, the pool name, and the client name. If you use ``cephx``
|
|
authentication, you must also specify a secret. ::
|
|
|
|
sudo rbd map {image-name} --pool {pool-name} --name {client-name}
|
|
|
|
For example::
|
|
|
|
sudo rbd map foo --pool rbd myimage --name client.admin
|
|
|
|
If you use ``cephx`` authentication, you must also specify a secret. It may come from a keyring, a file containing the secret, or be specified explicitly on the command line. ::
|
|
|
|
sudo rbd map foo --pool rbd myimage --name client.foo --keyring /path/to/keyring
|
|
sudo rbd map foo --pool rbd myimage --name client.foo --keyfile /path/to/file
|
|
|
|
|
|
Show Mapped Block Devices
|
|
=========================
|
|
|
|
To show RBD images mapped to kernel block devices with the ``rbd`` command,
|
|
specify the ``showmapped`` option. ::
|
|
|
|
sudo rbd showmapped
|
|
|
|
|
|
Unmapping a Block Device
|
|
========================
|
|
|
|
To unmap an RBD image with the ``rbd`` command, specify the ``rm`` option
|
|
and the device name (i.e., by convention the same as the RBD image name). ::
|
|
|
|
sudo rbd unmap /dev/rbd/{poolname}/{imagename}
|
|
|
|
For example::
|
|
|
|
sudo rbd unmap /dev/rbd/rbd/foo
|