# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
-from image_creator.util import get_command
+from image_creator.util import get_command, warn, progress_generator
from image_creator import FatalError
-from clint.textui import progress
+from clint.textui import indent, puts, colored
import stat
import os
This instance is a snapshot of the original source media of
the Disk instance.
"""
+
+ puts("Examining source media `%s'..." % self.source, False)
sourcedev = self.source
mode = os.stat(self.source).st_mode
if stat.S_ISDIR(mode):
+ puts(colored.green('looks like a directory'))
return self._losetup(self._dir_to_disk())
elif stat.S_ISREG(mode):
+ puts(colored.green('looks like an image file'))
sourcedev = self._losetup(self.source)
elif not stat.S_ISBLK(mode):
- raise ValueError("Value for self.source is invalid")
+ raise ValueError("Invalid media source. Only block devices, "
+ "regular files and directories are supported.")
+ else:
+ puts(colored.green('looks like a block device'))
# Take a snapshot and return it to the user
+ puts("Snapshotting media source...", False)
size = blockdev('--getsize', sourcedev)
cowfd, cow = tempfile.mkstemp()
os.close(cowfd)
self._add_cleanup(os.unlink, cow)
# Create 1G cow sparse file
- dd('if=/dev/null', 'of=%s' % cow, 'bs=1k', 'seek=%d' % (1024 * 1024))
+ dd('if=/dev/null', 'of=%s' % cow, 'bs=1k', \
+ 'seek=%d' % (1024 * 1024))
cowdev = self._losetup(cow)
snapshot = uuid.uuid4().hex
(int(size), sourcedev, cowdev))
dmsetup('create', snapshot, table)
self._add_cleanup(dmsetup, 'remove', snapshot)
+ # Sometimes dmsetup remove fails with Device or resource busy,
+ # although everything is cleaned up and the snapshot is not
+ # used by anyone. Add a 2 seconds delay to be on the safe side.
+ self._add_cleanup(time.sleep, 2)
+
finally:
os.unlink(table)
+ puts(colored.green('done'))
new_device = DiskDevice("/dev/mapper/%s" % snapshot)
self._devices.append(new_device)
new_device.enable()
device.destroy()
-def progress_generator(label=''):
- position = 0
- for i in progress.bar(range(100), label):
- if i < position:
- continue
- position = yield
- yield # suppress the StopIteration exception
-
-
class DiskDevice(object):
"""This class represents a block device hosting an Operating System
as created by the device-mapper.
def enable(self):
"""Enable a newly created DiskDevice"""
-
- self.progressbar = progress_generator("VM lauch: ")
+ self.progressbar = progress_generator("Launching helper VM: ")
self.progressbar.next()
eh = self.g.set_event_callback(self.progress_callback,
- guestfs.EVENT_PROGRESS)
+ guestfs.EVENT_PROGRESS)
self.g.launch()
self.guestfs_enabled = True
self.g.delete_event_callback(eh)
self.progressbar.send(100)
self.progressbar = None
+ puts('Inspecting Operating System...', False)
roots = self.g.inspect_os()
if len(roots) == 0:
raise FatalError("No operating system found")
if len(roots) > 1:
- raise FatalError("Multiple operating systems found")
-
+ raise FatalError("Multiple operating systems found."
+ "We only support images with one filesystem.")
self.root = roots[0]
self.ostype = self.g.inspect_get_type(self.root)
self.distro = self.g.inspect_get_distro(self.root)
+ puts(colored.green('found a %s system' % self.distro))
def destroy(self):
"""Destroy this DiskDevice instance."""
disk and then updating the partition table. The new disk size
(in bytes) is returned.
"""
+ puts("Shrinking image (this may take a while)...", False)
+
dev = self.g.part_to_dev(self.root)
parttype = self.g.part_get_parttype(dev)
if parttype != 'msdos':
part_dev = "%s%d" % (dev, last_partition['part_num'])
fs_type = self.g.vfs_type(part_dev)
if not re.match("ext[234]", fs_type):
- print "Warning: Don't know how to resize %s partitions." % vfs_type
+ warn("Don't know how to resize %s partitions." % vfs_type)
return
self.g.e2fsck_f(part_dev)
self.g.resize2fs_M(part_dev)
+
output = self.g.tune2fs_l(part_dev)
- block_size = int(filter(lambda x: x[0] == 'Block size', output)[0][1])
- block_cnt = int(filter(lambda x: x[0] == 'Block count', output)[0][1])
+ block_size = int(
+ filter(lambda x: x[0] == 'Block size', output)[0][1])
+ block_cnt = int(
+ filter(lambda x: x[0] == 'Block count', output)[0][1])
sector_size = self.g.blockdev_getss(dev)
self.g.part_del(dev, last_partition['part_num'])
self.g.part_add(dev, 'p', start, end)
- return (end + 1) * sector_size
+ new_size = (end + 1) * sector_size
+ puts(colored.green("new image size is %dMB\n" % (new_size // 2 ** 20)))
+
+ return new_size
def size(self):
"""Returns the "payload" size of the device.
dev = self.g.part_to_dev(self.root)
last = self.g.part_list(dev)[-1]
- return last['part_end']
+ return last['part_end'] + 1
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :
projects / snf-image-creator / blobdiff