103 lines
4.2 KiB
XML
103 lines
4.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="image-formats">
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<title>Disk and container formats for images</title>
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<?dbhtml stop-chunking?>
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<para>When you add an image to the Image service, you can specify
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its disk and container formats.</para>
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<section xml:id="disk-format">
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<title>Disk formats</title>
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<para>The disk format of a virtual machine image is the format
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of the underlying disk image. Virtual appliance vendors
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have different formats for laying out the information
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contained in a virtual machine disk image.</para>
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<para>Set the disk format for your image to one of the
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following values:</para>
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<itemizedlist>
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<listitem>
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<para><literal>raw</literal>: An unstructured disk
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image format; if you have a file without an
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extension it is possibly a raw format.</para>
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</listitem>
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<listitem>
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<para><literal>vhd</literal>: The VHD disk format, a
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common disk format used by virtual machine
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monitors from VMware, Xen, Microsoft, VirtualBox,
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and others.</para>
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</listitem>
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<listitem>
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<para><literal>vmdk</literal>: Common disk format
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supported by many common virtual machine
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monitors.</para>
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</listitem>
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<listitem>
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<para><literal>vdi</literal>: Supported by VirtualBox
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virtual machine monitor and the QEMU
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emulator.</para>
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</listitem>
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<listitem>
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<para><literal>iso</literal>: An archive format for
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the data contents of an optical disc, such as
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CD-ROM.</para>
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</listitem>
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<listitem>
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<para><literal>qcow2</literal>: Supported by the QEMU
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emulator that can expand dynamically and supports
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Copy on Write.</para>
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</listitem>
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<listitem>
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<para><literal>aki</literal>: An Amazon kernel
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image.</para>
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</listitem>
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<listitem>
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<para><literal>ari</literal>: An Amazon ramdisk
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image.</para>
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</listitem>
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<listitem>
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<para><literal>ami</literal>: An Amazon machine
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image.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section xml:id="container-format">
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<title>Container formats</title>
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<para>The container format indicates whether the virtual
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machine image is in a file format that also contains
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metadata about the actual virtual machine.</para>
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<note>
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<para>The Image service and other OpenStack projects do
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not currently support the container format. It is safe
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to specify <literal>bare</literal> as the container
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format if you are unsure.</para>
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</note>
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<para>You can set the container format for your image to one
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of the following values:</para>
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<itemizedlist>
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<listitem>
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<para><literal>bare</literal>. The image does not have
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a container or metadata envelope.</para>
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</listitem>
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<listitem>
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<para><literal>ovf</literal>. The OVF container
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format.</para>
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</listitem>
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<listitem>
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<para><literal>aki</literal>. An Amazon kernel image.
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</para>
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</listitem>
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<listitem>
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<para><literal>ari</literal>. An Amazon ramdisk
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image.</para>
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</listitem>
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<listitem>
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<para><literal>ami</literal>. An Amazon machine
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image.</para>
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</listitem>
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</itemizedlist>
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</section>
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</section>
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