blob: c1cf7709881551b55592fd57865b62a6fe9e01d0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
==========================
Block Device Quick Start
==========================
Ensure your :term:`Ceph Storage Cluster` is in an ``active + clean`` state
before working with the :term:`Ceph Block Device`.
.. note:: The Ceph Block Device is also known as :term:`RBD` or :term:`RADOS`
Block Device.
.. ditaa::
/------------------\ /----------------\
| Admin Node | | ceph-client |
| +-------->+ cCCC |
| ceph-deploy | | ceph |
\------------------/ \----------------/
You may use a virtual machine for your ``ceph-client`` node, but do not
execute the following procedures on the same physical node as your Ceph
Storage Cluster nodes (unless you use a VM). See `FAQ`_ for details.
Create a Block Device Pool
==========================
#. On the admin node, use the ``ceph`` tool to `create a pool`_
(we recommend the name 'rbd').
#. On the admin node, use the ``rbd`` tool to initialize the pool for use by RBD::
rbd pool init <pool-name>
Configure a Block Device
========================
#. On the ``ceph-client`` node, create a block device image. ::
rbd create foo --size 4096 --image-feature layering [-m {mon-IP}] [-k /path/to/ceph.client.admin.keyring] [-p {pool-name}]
#. On the ``ceph-client`` node, map the image to a block device. ::
sudo rbd map foo --name client.admin [-m {mon-IP}] [-k /path/to/ceph.client.admin.keyring] [-p {pool-name}]
#. Use the block device by creating a file system on the ``ceph-client``
node. ::
sudo mkfs.ext4 -m0 /dev/rbd/{pool-name}/foo
This may take a few moments.
#. Mount the file system on the ``ceph-client`` node. ::
sudo mkdir /mnt/ceph-block-device
sudo mount /dev/rbd/{pool-name}/foo /mnt/ceph-block-device
cd /mnt/ceph-block-device
#. Optionally configure the block device to be automatically mapped and mounted
at boot (and unmounted/unmapped at shutdown) - see the `rbdmap manpage`_.
See `block devices`_ for additional details.
.. _create a pool: ../../rados/operations/pools/#create-a-pool
.. _block devices: ../../rbd
.. _FAQ: http://wiki.ceph.com/How_Can_I_Give_Ceph_a_Try
.. _OS Recommendations: ../os-recommendations
.. _rbdmap manpage: ../../man/8/rbdmap
|
