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69 lines
2.0 KiB
ReStructuredText
69 lines
2.0 KiB
ReStructuredText
==============
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QEMU and RBD
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==============
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Ceph integrates with the QEMU virtual machine. For details on QEMU, see
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`QEMU Open Source Processor Emulator`_. For QEMU documentation, see
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`QEMU Manual`_.
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.. important:: To use RBD with QEMU, you must have a running Ceph cluster.
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Installing QEMU on Ubuntu 12.04 Precise
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---------------------------------------
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QEMU packages are incorporated into the Ubuntu 12.04 precise distribution. To
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install QEMU on precise, execute the following::
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sudo apt-get install qemu
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Installing QEMU on Earlier Versions of Ubuntu
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---------------------------------------------
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For Ubuntu distributions 11.10 oneiric and earlier, you must install
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the 0.15 version of QEMU or later. To build QEMU from source, use the
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following procedure::
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cd {your-development-directory}
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git clone git://git.qemu.org/qemu.git
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cd qemu
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./configure --enable-rbd
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make; make install
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Creating RBD Images with QEMU
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-----------------------------
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You can create an RBD image from QEMU. You must specify ``rbd``,
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the pool name, and the name of the image you wish to create. You must also
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specify the size of the image. ::
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qemu-img create -f rbd rbd:{pool-name}/{image-name} {size}
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For example::
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qemu-img create -f rbd rbd:data/foo 10G
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Resizing RBD Images with QEMU
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-----------------------------
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You can resize an RBD image from QEMU. You must specify ``rbd``,
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the pool name, and the name of the image you wish to resize. You must also
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specify the size of the image. ::
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qemu-img resize -f rbd rbd:{pool-name}/{image-name} {size}
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For example::
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qemu-img resize -f rbd rbd:data/foo 10G
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Retrieving RBD Image Information with QEMU
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------------------------------------------
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You can retrieve RBD image information from QEMU. You must
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specify ``rbd``, the pool name, and the name of the image. ::
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qemu-img info -f rbd rbd:{pool-name}/{image-name}
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For example::
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qemu-img info -f rbd rbd:data/foo
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.. _QEMU Open Source Processor Emulator: http://wiki.qemu.org/Main_Page
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.. _QEMU Manual: http://wiki.qemu.org/Manual
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