def create(self, lock=None):
db.update_instance_state(self.db_entry['uuid'], 'creating')
# Ensure we have state on disk
if not os.path.exists(self.instance_path):
LOG.withObj(self).debug('Creating instance storage at %s' %
self.instance_path)
os.makedirs(self.instance_path)
# Generate a config drive
with util.RecordedOperation('make config drive', self):
self._make_config_drive(
os.path.join(
self.instance_path,
self.db_entry['block_devices']['devices'][1]['path']))
# Prepare disks
if not self.db_entry['block_devices']['finalized']:
modified_disks = []
for disk in self.db_entry['block_devices']['devices']:
if disk.get('base'):
img = images.Image.from_url(disk['base'])
hashed_image_path = img.version_image_path()
with util.RecordedOperation('detect cdrom images', self):
try:
cd = pycdlib.PyCdlib()
cd.open(hashed_image_path)
disk['present_as'] = 'cdrom'
except Exception:
pass
if disk.get('present_as', 'cdrom') == 'cdrom':
# There is no point in resizing or COW'ing a cdrom
disk['path'] = disk['path'].replace('.qcow2', '.raw')
disk['type'] = 'raw'
disk['snapshot_ignores'] = True
try:
os.link(hashed_image_path, disk['path'])
except OSError:
# Different filesystems
util.execute([lock], 'cp %s %s' %
(hashed_image_path, disk['path']))
# Due to limitations in some installers, cdroms are always on IDE
disk['device'] = 'hd%s' % disk['device'][-1]
disk['bus'] = 'ide'
else:
if config.parsed.get('DISK_FORMAT') == 'qcow':
with util.RecordedOperation(
'create copy on write layer', self):
images.create_cow([lock], hashed_image_path,
disk['path'], disk['size'])
# Record the backing store for modern libvirts
disk['backing'] = (
'<backingStore type=\'file\'>\n'
' <format type=\'qcow2\'/>\n'
' <source file=\'%s\'/>\n'
' </backingStore>\n' %
(hashed_image_path))
elif config.parsed.get('DISK_FORMAT') == 'qcow_flat':
with util.RecordedOperation('resize image', self):
resized_image_path = img.resize([lock],
disk['size'])
with util.RecordedOperation(
'create flat layer', self):
images.create_flat([lock], resized_image_path,
disk['path'])
elif config.parsed.get('DISK_FORMAT') == 'flat':
with util.RecordedOperation('resize image', self):
resized_image_path = img.resize([lock],
disk['size'])
with util.RecordedOperation(
'create raw disk', self):
images.create_raw([lock], resized_image_path,
disk['path'])
else:
raise Exception('Unknown disk format')
elif not os.path.exists(disk['path']):
util.execute(
None, 'qemu-img create -f qcow2 %s %sG' %
(disk['path'], disk['size']))
modified_disks.append(disk)
self.db_entry['block_devices']['devices'] = modified_disks
self.db_entry['block_devices']['finalized'] = True
db.persist_block_devices(self.db_entry['uuid'],
self.db_entry['block_devices'])
# Create the actual instance
with util.RecordedOperation('create domain XML', self):
self._create_domain_xml()
# Sometimes on Ubuntu 20.04 we need to wait for port binding to work.
# Revisiting this is tracked by issue 320 on github.
with util.RecordedOperation('create domain', self):
if not self.power_on():
attempts = 0
while not self.power_on() and attempts < 100:
LOG.withObj(self).warning(
'Instance required an additional attempt to power on')
time.sleep(5)
attempts += 1
if self.is_powered_on():
LOG.withObj(self).info('Instance now powered on')
else:
LOG.withObj(self).info('Instance failed to power on')
db.update_instance_state(self.db_entry['uuid'], 'created')
def test_create_cow(self, mock_exists, mock_execute):
images.create_cow(None, '/a/b/c/base', '/a/b/c/cow', 10)
mock_execute.assert_called_with(
None, 'qemu-img create -b /a/b/c/base -f qcow2 /a/b/c/cow 10G')
def create(self, lock=None):
# Ensure we have state on disk
if not os.path.exists(self.instance_path):
LOG.debug('%s: Creating instance storage at %s' %
(self, self.instance_path))
os.makedirs(self.instance_path)
# Generate a config drive
with util.RecordedOperation('make config drive', self) as _:
self._make_config_drive(
os.path.join(
self.instance_path,
self.db_entry['block_devices']['devices'][1]['path']))
# Prepare disks
if not self.db_entry['block_devices']['finalized']:
modified_disks = []
for disk in self.db_entry['block_devices']['devices']:
if disk.get('base'):
with util.RecordedOperation('fetch image', self) as _:
image_url = images.resolve(disk['base'])
hashed_image_path, info, image_dirty, resp = \
images.requires_fetch(image_url)
if image_dirty:
hashed_image_path = images.fetch(hashed_image_path,
info,
resp,
lock=lock)
else:
hashed_image_path = '%s.v%03d' % (
hashed_image_path, info['version'])
try:
cd = pycdlib.PyCdlib()
cd.open(hashed_image_path)
disk['present_as'] = 'cdrom'
except Exception:
pass
if disk.get('present_as', 'cdrom') == 'cdrom':
# There is no point in resizing or COW'ing a cdrom
disk['path'] = disk['path'].replace('.qcow2', '.raw')
disk['type'] = 'raw'
disk['snapshot_ignores'] = True
try:
os.link(hashed_image_path, disk['path'])
except OSError:
# Different filesystems
if lock:
lock.refresh()
shutil.copyfile(hashed_image_path, disk['path'])
if lock:
lock.refresh()
# Due to limitations in some installers, cdroms are always on IDE
disk['device'] = 'hd%s' % disk['device'][-1]
disk['bus'] = 'ide'
else:
with util.RecordedOperation('transcode image',
self) as _:
if lock:
lock.refresh()
images.transcode(hashed_image_path)
with util.RecordedOperation('resize image', self) as _:
if lock:
lock.refresh()
resized_image_path = images.resize(
hashed_image_path, disk['size'])
with util.RecordedOperation(
'create copy on write layer', self) as _:
if lock:
lock.refresh
images.create_cow(resized_image_path, disk['path'])
elif not os.path.exists(disk['path']):
processutils.execute('qemu-img create -f qcow2 %s %sG' %
(disk['path'], disk['size']),
shell=True)
modified_disks.append(disk)
self.db_entry['block_devices']['devices'] = modified_disks
self.db_entry['block_devices']['finalized'] = True
db.persist_block_devices(self.db_entry['uuid'],
self.db_entry['block_devices'])
# Create the actual instance
with util.RecordedOperation('create domain XML', self) as _:
self._create_domain_xml()
with util.RecordedOperation('create domain', self) as _:
self.power_on()
db.update_instance_state(self.db_entry['uuid'], 'created')
def test_create_cow(self, mock_exists, mock_execute):
images.create_cow('/a/b/c/base', '/a/b/c/cow')
mock_execute.assert_called_with(
'qemu-img create -b /a/b/c/base -f qcow2 /a/b/c/cow', shell=True)
