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57 lines
2.2 KiB
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===================
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RBD and OpenStack
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===================
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You may utilize RBD with OpenStack. To use RBD with OpenStack, you must install
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QEMU, ``libvirt``, and OpenStack first. We recommend using a separate physical
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host for your OpenStack installation. OpenStack recommends a minimum of
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8GB of RAM and a quad-core processor. If you have not already installed
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OpenStack, install it now. See `Installing OpenStack`_ for details.
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.. _Installing OpenStack: ../../install/openstack
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.. important:: To use RBD with OpenStack, you must have a running Ceph cluster.
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.. tip: To get started quickly, turn off cephx authentication.
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Create a Pool
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-------------
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By default, RBD uses the ``data`` pool. You may use any available RBD pool.
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We recommend creating a pool for Nova. Ensure your Ceph cluster is running,
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then create a pool. ::
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sudo rados mkpool nova
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Install Ceph Common on the OpenStack Host
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-----------------------------------------
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OpenStack operates as a Ceph client. You must install Ceph common on the
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OpenStack host, and copy your Ceph cluster's ``ceph.conf`` file to the
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``/etc/ceph`` directory. If you have installed Ceph on the host, Ceph common
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is already included. ::
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sudo apt-get install ceph-common
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cd /etc/ceph
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ssh your-openstack-server sudo tee /etc/ceph/ceph.conf <ceph.conf
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Add the RBD Driver and the Pool Name to ``nova.conf``
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-----------------------------------------------------
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OpenStack requires a driver to interact with RADOS block devices. You must also
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specify the pool name for the block device. On your OpenStack host, navigate to
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the ``/etc/conf`` directory. Open the ``nova.conf`` file in a text editor using
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sudo privileges and add the following lines to the file::
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volume_driver=nova.volume.driver.RBDDriver
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rbd_pool=nova
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Restart OpenStack
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-----------------
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To activate the RBD driver and load the RBD pool name into the configuration,
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you must restart OpenStack. Navigate the directory where you installed
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OpenStack, and execute the following::
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./rejoin-stack.sh
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If you have OpenStack configured as a service, you can also execute::
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sudo service nova-volume restart
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Once OpenStack is up and running, you should be able to create a volume with
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OpenStack on a Ceph RADOS block device. |