Admin: Created page with "This page describes one the very basic way to use a Ceph storage: you create a RBD pool in which you can create images, and these images can then be mounted on a client machin..."

2021-04-06T10:20:27Z

Created page with "This page describes one the very basic way to use a Ceph storage: you create a RBD pool in which you can create images, and these images can then be mounted on a client machin..."

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This page describes one the very basic way to use a Ceph storage: you create a RBD pool in which you can create images, and these images can then be mounted on a client machine.

== Creation of RBD pool ==
<pre>
# ceph osd pool create test1
# ceph osd pool application enable test1 rbd
</pre>

== Creation of a user with rights on the pool ==
<pre>
# ceph auth add client.toto mon 'profile rbd' osd 'profile rbd pool=test1' mgr 'profile rbd'
</pre>

== Configuration of the client machine ==
* add the repo Ceph Octopus x86_64
* install the package ceph-common
* create files ''/etc/ceph/ceph.conf'' and ''/etc/ceph/ceph.keyring''
You'll need to issue the following commands on the cephadm machine to get the content of these files:
<pre>
# ceph config generate-minimal-conf
# ceph auth get client.toto
</pre>

== Mount the block device on the client ==
* create an image:
<pre>
# rbd -n client.toto -p test1 create foo --size 1024 --image-feature layering
</pre>
* map the image on a local device:
<pre>
# rbd -n client.toto map foo -p test1
</pre>
As a result of the previous command, you've got the name of the device.
* format the device:
<pre>
# mkfs.ext4 -m0 /dev/rbd/test1/foo
</pre>
* mount the device:
<pre>
# mkdir /mnt/cephmount
# mount /dev/rbd/test1/foo /mnt/ceph
</pre>

Mounting a RBD on a client machine - Revision history

Admin: Created page with "This page describes one the very basic way to use a Ceph storage: you create a RBD pool in which you can create images, and these images can then be mounted on a client machin..."