def download_image_files(self, image_id, destdir):
"""
Downloads the manifest.xml and all AMI parts for image_id to destdir
"""
if not os.path.isdir(destdir):
raise exception.BaseException(
"destination directory '%s' does not exist" % destdir)
widgets = [
'file: ',
progressbar.Percentage(), ' ',
progressbar.Bar(marker=progressbar.RotatingMarker()), ' ',
progressbar.ETA(), ' ',
progressbar.FileTransferSpeed()
]
files = self.get_image_files(image_id)
def _dl_progress_cb(trans, total):
pbar.update(trans)
log.info("Downloading image: %s" % image_id)
for file in files:
widgets[0] = "%s:" % file.name
pbar = progressbar.ProgressBar(widgets=widgets,
maxval=file.size).start()
file.get_contents_to_filename(os.path.join(destdir, file.name),
cb=_dl_progress_cb)
pbar.finish()
def progress_bar(self):
if not self._progress_bar:
widgets = ['FileTransfer: ', ' ', progressbar.Percentage(), ' ',
progressbar.Bar(marker=progressbar.RotatingMarker()),
' ', progressbar.ETA(), ' ',
progressbar.FileTransferSpeed()]
pbar = progressbar.ProgressBar(widgets=widgets,
maxval=1,
force_update=True)
self._progress_bar = pbar
return self._progress_bar
def wait_for_snapshot(self, snapshot, refresh_interval=30):
snap = snapshot
log.info("Waiting for snapshot to complete: %s" % snap.id)
widgets = ['%s: ' % snap.id, '',
progressbar.Bar(marker=progressbar.RotatingMarker()),
'', progressbar.Percentage(), ' ', progressbar.ETA()]
pbar = progressbar.ProgressBar(widgets=widgets, maxval=100).start()
while snap.status != 'completed':
try:
progress = int(snap.update().replace('%', ''))
pbar.update(progress)
except ValueError:
time.sleep(5)
continue
time.sleep(refresh_interval)
pbar.finish()
def migrate_image(self, image_id, destbucket, migrate_manifest=False,
kernel_id=None, ramdisk_id=None, region=None, cert=None,
private_key=None):
"""
Migrate image_id files to destbucket
"""
if migrate_manifest:
utils.check_required(['ec2-migrate-manifest'])
if not cert:
raise exception.BaseException("no cert specified")
if not private_key:
raise exception.BaseException("no private_key specified")
if not kernel_id:
raise exception.BaseException("no kernel_id specified")
if not ramdisk_id:
raise exception.BaseException("no ramdisk_id specified")
image = self.get_image(image_id)
if image.root_device_type == "ebs":
raise exception.AWSError(
"The image you wish to migrate is EBS-based. " +
"This method only works for instance-store images")
ibucket = self.get_image_bucket(image)
files = self._get_image_files(image, ibucket)
if not files:
log.info("No files found for image: %s" % image_id)
return
log.info("Migrating image: %s" % image_id)
widgets = [files[0].name, progressbar.Percentage(), ' ',
progressbar.Bar(marker=progressbar.RotatingMarker()), ' ',
progressbar.ETA(), ' ', ' ']
counter = 0
num_files = len(files)
pbar = progressbar.ProgressBar(widgets=widgets,
maxval=num_files).start()
for f in files:
widgets[0] = "%s: (%s/%s)" % (f.name, counter + 1, num_files)
# copy file to destination bucket with the same name
f.copy(destbucket, f.name)
pbar.update(counter)
counter += 1
pbar.finish()
if migrate_manifest:
dbucket = self.s3.get_bucket(destbucket)
manifest_key = dbucket.get_key(self.get_image_manifest(image))
f = tempfile.NamedTemporaryFile()
manifest_key.get_contents_to_file(f.file)
f.file.close()
cmd = ('ec2-migrate-manifest -c %s -k %s -m %s --kernel %s ' +
'--ramdisk %s --no-mapping ') % (cert, private_key,
f.name, kernel_id,
ramdisk_id)
register_cmd = "ec2-register %s/%s" % (destbucket,
manifest_key.name)
if region:
cmd += '--region %s' % region
register_cmd += " --region %s" % region
log.info("Migrating manifest file...")
retval = os.system(cmd)
if retval != 0:
raise exception.BaseException(
"ec2-migrate-manifest failed with status %s" % retval)
f.file = open(f.name, 'r')
manifest_key.set_contents_from_file(f.file)
# needed so that EC2 has permission to READ the manifest file
manifest_key.add_email_grant('READ', '*****@*****.**')
f.close()
os.unlink(f.name + '.bak')
log.info("Manifest migrated successfully. You can now run:\n" +
register_cmd + "\nto register your migrated image.")
