-#!/usr/bin/env python
-
-from image_creator.util import get_command
+# Copyright 2012 GRNET S.A. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or
+# without modification, are permitted provided that the following
+# conditions are met:
+#
+# 1. Redistributions of source code must retain the above
+# copyright notice, this list of conditions and the following
+# disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following
+# disclaimer in the documentation and/or other materials
+# provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# The views and conclusions contained in the software and
+# documentation are those of the authors and should not be
+# interpreted as representing official policies, either expressed
+# or implied, of GRNET S.A.
+
+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
def _losetup(self, fname):
loop = losetup('-f', '--show', fname)
- loop = loop.strip() # remove the new-line char
+ loop = loop.strip() # remove the new-line char
self._add_cleanup(losetup, '-d', loop)
return loop
This instance is a snapshot of the original source media of
the Disk instance.
"""
- sourcedev = self.source
- mode = os.stat(self.source).st_mode
- if stat.S_ISDIR(mode):
- return self._losetup(self._dir_to_disk())
- elif stat.S_ISREG(mode):
- sourcedev = self._losetup(self.source)
- elif not stat.S_ISBLK(mode):
- raise ValueError("Value for self.source is invalid")
+
+ puts("Examining source media `%s'" % self.source)
+ with indent(4):
+ 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("Invalid media source. Only block devices, "
+ "regular files and directories are supported.")
+ else:
+ puts(colored.green('Looks like a block device'))
+ #puts()
# Take a snapshot and return it to the user
- 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))
- cowdev = self._losetup(cow)
-
- snapshot = uuid.uuid4().hex
- tablefd, table = tempfile.mkstemp()
- try:
- os.write(tablefd, "0 %d snapshot %s %s n 8" % \
- (int(size), sourcedev, cowdev))
- dmsetup('create', snapshot, table)
- self._add_cleanup(dmsetup, 'remove', snapshot)
- finally:
- os.unlink(table)
+ puts("Snapshotting media source")
+ with indent(4):
+ 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))
+ cowdev = self._losetup(cow)
+
+ snapshot = uuid.uuid4().hex
+ tablefd, table = tempfile.mkstemp()
+ try:
+ os.write(tablefd, "0 %d snapshot %s %s n 8" % \
+ (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'))
+ # puts()
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.
#self.g.set_verbose(1)
self.guestfs_enabled = False
-
+
def enable(self):
"""Enable a newly created DiskDevice"""
-
- self.progressbar = progress_generator("VM lauch: ")
- self.progressbar.next()
- eh = self.g.set_event_callback(self.progress_callback, guestfs.EVENT_PROGRESS)
- self.g.launch()
- self.guestfs_enabled = True
- self.g.delete_event_callback(eh)
- if self.progressbar is not None:
- self.progressbar.send(100)
- self.progressbar = None
-
- 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")
-
- self.root = roots[0]
- self.ostype = self.g.inspect_get_type(self.root)
- self.distro = self.g.inspect_get_distro(self.root)
+ self.progressbar = progress_generator("Launching helper VM: ")
+ with indent(4):
+ self.progressbar.next()
+ eh = self.g.set_event_callback(self.progress_callback,
+ guestfs.EVENT_PROGRESS)
+ self.g.launch()
+ self.guestfs_enabled = True
+ self.g.delete_event_callback(eh)
+ if self.progressbar is not None:
+ self.progressbar.send(100)
+ self.progressbar = None
+ puts(colored.green('Done'))
+
+ puts('Inspecting Operating System')
+ with indent(4):
+ 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."
+ "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))
+ puts()
def destroy(self):
"""Destroy this DiskDevice instance."""
position = array[2]
total = array[3]
- assert self.progress_bar is not None
- print 'posisition/total: %s/%s' % (position, total)
- self.progress_bar.send((position * 100)//total)
+ self.progressbar.send((position * 100) // total)
if position == total:
- self.progress_bar = None
+ self.progressbar = None
def mount(self):
"""Mount all disk partitions in a correct order."""
disk and then updating the partition table. The new disk size
(in bytes) is returned.
"""
+ puts("Shrinking image (this may take a while)")
+
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])
+ with indent(4):
+ 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])
- sector_size = self.g.blockdev_getss(dev)
+ sector_size = self.g.blockdev_getss(dev)
- start = last_partition['part_start'] / sector_size
- end = start + (block_size * block_cnt) / sector_size - 1
+ start = last_partition['part_start'] / sector_size
+ end = start + (block_size * block_cnt) / sector_size - 1
- self.g.part_del(dev, last_partition['part_num'])
- self.g.part_add(dev, 'p', start, end)
+ 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(" New image size is %dMB\n" % (new_size // 2 ** 20))
+ return new_size
def size(self):
"""Returns the "payload" size of the device.
projects / snf-image-creator / blobdiff