def get_image(self, media, **kwargs):
"""Returns a newly created Image instance."""
info = image_info(media)
image = Image(media, self.out, format=info['format'], **kwargs)
self._images.append(image)
image.enable()
return image
def get_image(self, media, **kwargs):
"""Returns a newly created Image instance."""
info = image_info(media)
image = Image(media, self.out, format=info['format'], **kwargs)
self._images.append(image)
image.enable()
return image
def snapshot(self):
"""Creates a snapshot of the original source media of the Disk
instance.
"""
if self.source == '/':
self.out.warn("Snapshotting ignored for host bundling mode.")
return self.file
# Examine media file
info = image_info(self.file)
self.out.info("Snapshotting media source ...", False)
# Create a qcow2 snapshot for image files that are not raw
if info['format'] != 'raw':
snapshot = create_snapshot(self.file, self.tmp)
self._add_cleanup(os.unlink, snapshot)
self.out.success('done')
return snapshot
# Create a device-mapper snapshot for raw image files and block devices
mode = os.stat(self.file).st_mode
device = self.file if stat.S_ISBLK(mode) else self._losetup(self.file)
size = int(blockdev('--getsz', device))
cowfd, cow = tempfile.mkstemp(dir=self.tmp)
os.close(cowfd)
self._add_cleanup(os.unlink, cow)
# Create cow sparse file
dd('if=/dev/null', 'of=%s' % cow, 'bs=512', 'seek=%d' % size)
cowdev = self._losetup(cow)
snapshot = 'snf-image-creator-snapshot-%s' % uuid.uuid4().hex
tablefd, table = tempfile.mkstemp()
try:
try:
os.write(tablefd, "0 %d snapshot %s %s n 8\n" %
(size, device, cowdev))
finally:
os.close(tablefd)
dmsetup('create', snapshot, table)
self._add_cleanup(try_fail_repeat, dmsetup, 'remove', snapshot)
finally:
os.unlink(table)
self.out.success('done')
return "/dev/mapper/%s" % snapshot
def snapshot(self):
"""Creates a snapshot of the original source media of the Disk
instance.
"""
if self.source == '/':
self.out.warn("Snapshotting ignored for host bundling mode.")
return self.file
# Examine media file
info = image_info(self.file)
self.out.info("Snapshotting media source ...", False)
# Create a qcow2 snapshot for image files that are not raw
if info['format'] != 'raw':
snapshot = create_snapshot(self.file, self.tmp)
self._add_cleanup(os.unlink, snapshot)
self.out.success('done')
return snapshot
# Create a device-mapper snapshot for raw image files and block devices
mode = os.stat(self.file).st_mode
device = self.file if stat.S_ISBLK(mode) else self._losetup(self.file)
size = int(blockdev('--getsz', device))
cowfd, cow = tempfile.mkstemp(dir=self.tmp)
os.close(cowfd)
self._add_cleanup(os.unlink, cow)
# Create cow sparse file
dd('if=/dev/null', 'of=%s' % cow, 'bs=512', 'seek=%d' % size)
cowdev = self._losetup(cow)
snapshot = 'snf-image-creator-snapshot-%s' % uuid.uuid4().hex
tablefd, table = tempfile.mkstemp()
try:
try:
os.write(tablefd,
"0 %d snapshot %s %s n 8\n" % (size, device, cowdev))
finally:
os.close(tablefd)
dmsetup('create', snapshot, table)
self._add_cleanup(try_fail_repeat, dmsetup, 'remove', snapshot)
finally:
os.unlink(table)
self.out.success('done')
return "/dev/mapper/%s" % snapshot
