151 lines
6.1 KiB
Python
151 lines
6.1 KiB
Python
# Copyright 2016 Intel.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from docker import errors
|
|
import six
|
|
|
|
from oslo_log import log as logging
|
|
from oslo_utils import excutils
|
|
|
|
from zun.common.docker_image import reference as docker_image
|
|
from zun.common import exception
|
|
from zun.common.i18n import _
|
|
from zun.common import utils
|
|
import zun.conf
|
|
from zun.container.docker import utils as docker_utils
|
|
from zun.image import driver
|
|
|
|
|
|
CONF = zun.conf.CONF
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class DockerDriver(driver.ContainerImageDriver):
|
|
def __init__(self):
|
|
super(DockerDriver, self).__init__()
|
|
|
|
def delete_image(self, context, img_id):
|
|
LOG.debug('Delete an image %s in docker', img_id)
|
|
with docker_utils.docker_client() as docker:
|
|
try:
|
|
docker.remove_image(img_id)
|
|
except errors.ImageNotFound:
|
|
return
|
|
except errors.APIError as api_error:
|
|
raise exception.ZunException(six.text_type(api_error))
|
|
except Exception as e:
|
|
LOG.exception('Unknown exception occurred while deleting '
|
|
'image %s in glance:%s',
|
|
img_id,
|
|
six.text_type(e))
|
|
raise exception.ZunException(six.text_type(e))
|
|
|
|
def _search_image_on_host(self, repo, tag):
|
|
with docker_utils.docker_client() as docker:
|
|
image = repo + ":" + tag
|
|
LOG.debug('Inspecting image locally %s', image)
|
|
try:
|
|
image_dict = docker.inspect_image(image)
|
|
if image_dict:
|
|
return {'image': repo, 'path': None}
|
|
except errors.NotFound:
|
|
LOG.debug('Image %s not found locally', image)
|
|
return None
|
|
|
|
def _pull_image(self, repo, tag, registry):
|
|
auth_config = None
|
|
image_ref = docker_image.Reference.parse(repo)
|
|
registry_domain, remainder = image_ref.split_hostname()
|
|
if registry and registry.username:
|
|
auth_config = {'username': registry.username,
|
|
'password': registry.password}
|
|
elif (registry_domain and
|
|
registry_domain == CONF.docker.default_registry and
|
|
CONF.docker.default_registry_username):
|
|
auth_config = {'username': CONF.docker.default_registry_username,
|
|
'password': CONF.docker.default_registry_password}
|
|
|
|
with docker_utils.docker_client() as docker:
|
|
try:
|
|
docker.pull(repo, tag=tag, auth_config=auth_config)
|
|
except errors.NotFound as e:
|
|
raise exception.ImageNotFound(message=six.text_type(e))
|
|
except errors.APIError as e:
|
|
LOG.exception('Error on pulling image')
|
|
message = _('Error on pulling image: %(repo)s:%(tag)s') % {
|
|
'repo': repo, 'tag': tag}
|
|
raise exception.ZunException(message)
|
|
|
|
def pull_image(self, context, repo, tag, image_pull_policy, registry):
|
|
image_loaded = True
|
|
image = self._search_image_on_host(repo, tag)
|
|
if not utils.should_pull_image(image_pull_policy, bool(image)):
|
|
if image:
|
|
LOG.debug('Image %s present locally', repo)
|
|
return image, image_loaded
|
|
else:
|
|
message = _('Image %s not present with pull policy of Never'
|
|
) % repo
|
|
raise exception.ImageNotFound(message)
|
|
|
|
try:
|
|
LOG.debug('Pulling image from docker %(repo)s,'
|
|
' context %(context)s',
|
|
{'repo': repo, 'context': context})
|
|
self._pull_image(repo, tag, registry)
|
|
return {'image': repo, 'path': None}, image_loaded
|
|
except exception.ImageNotFound:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error('Image %s was not found in docker repo', repo)
|
|
except exception.DockerError:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error('Docker API error occurred during downloading '
|
|
'image %s', repo)
|
|
except Exception as e:
|
|
msg = _('Cannot download image from docker: {0}')
|
|
raise exception.ZunException(msg.format(e))
|
|
|
|
def search_image(self, context, repo, tag, exact_match):
|
|
image_ref = docker_image.Reference.parse(repo)
|
|
registry, image_name = image_ref.split_hostname()
|
|
if registry and registry != 'docker.io':
|
|
# Images searching is only supported in DockerHub
|
|
msg = _('Image searching is not supported in registry: {0}')
|
|
raise exception.OperationNotSupported(msg.format(registry))
|
|
|
|
with docker_utils.docker_client() as docker:
|
|
try:
|
|
# TODO(hongbin): search image by both name and tag
|
|
images = docker.search(image_name)
|
|
except errors.APIError as api_error:
|
|
raise exception.ZunException(six.text_type(api_error))
|
|
except Exception as e:
|
|
msg = _('Cannot search image in docker: {0}')
|
|
raise exception.ZunException(msg.format(e))
|
|
|
|
if exact_match:
|
|
images = [i for i in images if i['name'] == image_name]
|
|
|
|
for image in images:
|
|
image['metadata'] = {}
|
|
for key in ('is_official', 'star_count'):
|
|
value = image.pop(key, None)
|
|
if value is not None:
|
|
image['metadata'][key] = value
|
|
|
|
# TODO(hongbin): convert images to a list of Zun Image object
|
|
return images
|