The nova.virt.libvirt.imagebackend Module

class Backend(use_cow)

Bases: object

image(instance, name, suffix=None, image_type=None)

Constructs image for selected backend

Instance :Instance name. Name :Image name. Suffix :Suffix for image name (optional). Image_type :Image type.

Optional, is FLAGS.libvirt_images_type by default.

class Image(instance, name, suffix)

Bases: object

cache(fn, fname, size=None, *args, **kwargs)

Creates image from template.

Ensures that template and image not already exists. Ensures that base directory exists. Synchronizes on template fetching.

Fn :function, that creates template.

Should accept target argument. :fname: Template name :size: Size of created image in bytes (optional)

create_image(prepare_template, base, size, *args, **kwargs)

Create image from template.

Contains specific behavior for each image type.

Prepare_template :  function, that creates template.

Should accept target argument. :base: Template name :size: Size of created image in bytes

libvirt_info(device_type)

Get LibvirtConfigGuestDisk filled for this image.

Device_type :Device type for this image.

class Lvm(instance, name, suffix)

Bases: nova.virt.libvirt.imagebackend.Image

create_image(prepare_template, base, size, *args, **kwargs)

static escape(fname)

libvirt_info(device_type)

remove_volume_on_error(*args, **kwds)

class Qcow2(instance, name, suffix)

Bases: nova.virt.libvirt.imagebackend.Raw

create_image(prepare_template, base, size, *args, **kwargs)

libvirt_info(device_type)

class Raw(instance, name, suffix)

Bases: nova.virt.libvirt.imagebackend.Image

create_image(prepare_template, base, size, *args, **kwargs)

libvirt_info(device_type)