70978f2d43
blueprint snapshots-for-everyone Use simple qemu-img convert for raw snapshots. Polymorphically select snapshot behavior for raw and qcow2. Allow images to be constructed from actual device/file path. Change-Id: I6a57e43c6775c144c41a53382dcc7504ce6d4c43
61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Grid Dynamics
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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from nova.virt.libvirt import config
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from nova.virt.libvirt import imagebackend
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class Backend(object):
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def __init__(self, use_cow):
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pass
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def image(self, instance, name, image_type=''):
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class FakeImage(imagebackend.Image):
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def __init__(self, instance, name):
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self.path = os.path.join(instance, name)
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def create_image(self, prepare_template, base,
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size, *args, **kwargs):
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pass
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def cache(self, fetch_func, filename, size=None, *args, **kwargs):
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pass
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def snapshot(self, name):
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pass
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def libvirt_info(self, disk_bus, disk_dev, device_type,
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cache_mode):
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info = config.LibvirtConfigGuestDisk()
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info.source_type = 'file'
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info.source_device = device_type
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info.target_bus = disk_bus
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info.target_dev = disk_dev
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info.driver_cache = cache_mode
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info.driver_format = 'raw'
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info.source_path = self.path
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return info
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return FakeImage(instance, name)
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def snapshot(self, path, name, image_type=''):
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#NOTE(bfilippov): this is done in favor for
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# snapshot tests in test_libvirt.LibvirtConnTestCase
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return imagebackend.Backend(True).snapshot(path, name, image_type)
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