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2.0 KiB
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73 lines
2.0 KiB
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=====================================
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Disk and container formats for images
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=====================================
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When you add an image to the Image service, you can specify
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its disk and container formats.
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Disk formats
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~~~~~~~~~~~~
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The disk format of a virtual machine image is the format of the
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underlying disk image.
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Virtual appliance vendors have different formats for laying out
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the information contained in a virtual machine disk image.
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Set the disk format for your image to one of the following values:
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aki
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An Amazon kernel image.
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ami
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An Amazon machine image.
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ari
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An Amazon ramdisk image.
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iso
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An archive format for the data contents of an optical disc,
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such as CD-ROM.
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qcow2
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Supported by the QEMU emulator that can expand dynamically
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and supports Copy on Write.
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raw
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An unstructured disk image format; if you have a file
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without an extension it is possibly a raw format.
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vdi
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Supported by VirtualBox virtual machine monitor and the QEMU emulator.
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vhd
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The VHD disk format, a common disk format used by virtual
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machine monitors from VMware, Xen, Microsoft, VirtualBox, and others.
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vhdx
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The VHDX disk format, an enhanced version of the VHD format, which
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supports larger disk sizes among other features.
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vmdk
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Common disk format supported by many common virtual machine monitors.
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Container formats
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~~~~~~~~~~~~~~~~~
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The container format indicates whether the virtual machine image is in
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a file format that also contains metadata about the actual virtual machine.
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.. note::
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The Image service and other OpenStack projects do not currently
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support the container format. It is safe to specify ``bare`` as
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the container format if you are unsure.
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You can set the container format for your image to one of the following
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values:
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aki
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An Amazon kernel image.
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ami
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An Amazon machine image.
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ari
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An Amazon ramdisk image.
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bare
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The image does not have a container or metadata envelope.
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docker
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A docker container format.
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ova
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An OVF package in a tarfile.
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ovf
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The OVF container format.
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