def pull_image(self, context, repo, tag, image_pull_policy):
# TODO(shubhams): glance driver does not handle tags
# once metadata is stored in db then handle tags
image_loaded = False
image = self._search_image_on_host(context, repo)
if image:
image_path = image['path']
image_checksum = image['checksum']
md5sum = hashlib.md5()
with open(image_path, 'rb') as fd:
while True:
# read 10MB of data each time
data = fd.read(10 * 1024 * 1024)
if not data:
break
md5sum.update(data)
md5sum = md5sum.hexdigest()
if md5sum == image_checksum:
image_loaded = True
return image, image_loaded
if not common_utils.should_pull_image(image_pull_policy, bool(image)):
if image:
LOG.debug('Image %s present locally', repo)
image_loaded = True
return image, image_loaded
else:
message = _(
'Image %s not present with pull policy of Never') % repo
raise exception.ImageNotFound(message)
LOG.debug('Pulling image from glance %s', repo)
try:
image_meta = utils.find_image(context, repo)
LOG.debug('Image %s was found in glance, downloading now...', repo)
image_chunks = utils.download_image_in_chunks(
context, image_meta.id)
except exception.ImageNotFound:
LOG.error('Image %s was not found in glance', repo)
raise
except Exception as e:
msg = _('Cannot download image from glance: {0}')
raise exception.ZunException(msg.format(e))
try:
images_directory = CONF.glance.images_directory
fileutils.ensure_tree(images_directory)
out_path = os.path.join(images_directory, image_meta.id + '.tar')
with open(out_path, 'wb') as fd:
for chunk in image_chunks:
fd.write(chunk)
except Exception as e:
msg = _('Error occurred while writing image: {0}')
raise exception.ZunException(msg.format(e))
LOG.debug('Image %(repo)s was downloaded to path : %(path)s', {
'repo': repo,
'path': out_path
})
return {'image': repo, 'path': out_path}, image_loaded
def pull_image(self, context, repo, tag, image_pull_policy, registry):
image_loaded = False
image = self._search_image_on_host(context, repo, tag)
if not common_utils.should_pull_image(image_pull_policy, bool(image)):
if image:
if self._verify_md5sum_for_image(image):
image_loaded = True
return image, image_loaded
else:
message = _(
'Image %s not present with pull policy of Never') % repo
raise exception.ImageNotFound(message)
LOG.debug('Pulling image from glance %s', repo)
try:
image_meta = utils.find_image(context, repo, tag)
LOG.debug('Image %s was found in glance, downloading now...', repo)
image_chunks = utils.download_image_in_chunks(
context, image_meta.id)
except exception.ImageNotFound:
LOG.error('Image %s was not found in glance', repo)
raise
except Exception as e:
msg = _('Cannot download image from glance: {0}')
raise exception.ZunException(msg.format(e))
try:
images_directory = CONF.glance.images_directory
fileutils.ensure_tree(images_directory)
out_path = os.path.join(images_directory, image_meta.id + '.tar')
with open(out_path, 'wb') as fd:
for chunk in image_chunks:
fd.write(chunk)
except Exception as e:
msg = _('Error occurred while writing image: {0}')
raise exception.ZunException(msg.format(e))
LOG.debug('Image %(repo)s was downloaded to path : %(path)s', {
'repo': repo,
'path': out_path
})
image = {
'image': image_meta.name,
'tags': image_meta.tags,
'path': out_path
}
return image, image_loaded
def pull_image(self, context, repo, tag, image_pull_policy, registry):
image_loaded = False
image = self._search_image_on_host(context, repo, tag)
if not common_utils.should_pull_image(image_pull_policy, bool(image)):
if image:
if self._verify_md5sum_for_image(image):
image_loaded = True
return image, image_loaded
else:
message = _('Image %s not present with pull policy of Never'
) % repo
raise exception.ImageNotFound(message)
LOG.debug('Pulling image from glance %s', repo)
try:
image_meta = utils.find_image(context, repo, tag)
LOG.debug('Image %s was found in glance, downloading now...', repo)
image_chunks = utils.download_image_in_chunks(context,
image_meta.id)
except exception.ImageNotFound:
LOG.error('Image %s was not found in glance', repo)
raise
except Exception as e:
msg = _('Cannot download image from glance: {0}')
raise exception.ZunException(msg.format(e))
try:
images_directory = CONF.glance.images_directory
fileutils.ensure_tree(images_directory)
out_path = os.path.join(images_directory, image_meta.id + '.tar')
with open(out_path, 'wb') as fd:
for chunk in image_chunks:
fd.write(chunk)
except Exception as e:
msg = _('Error occurred while writing image: {0}')
raise exception.ZunException(msg.format(e))
LOG.debug('Image %(repo)s was downloaded to path : %(path)s',
{'repo': repo, 'path': out_path})
image = {'image': image_meta.name, 'tags': image_meta.tags,
'path': out_path}
return image, image_loaded