96 lines
3.0 KiB
Python
96 lines
3.0 KiB
Python
# Copyright 2016 Intel.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import six
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import sys
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from oslo_log import log as logging
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import stevedore
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from zun.common.i18n import _
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import zun.conf
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CONF = zun.conf.CONF
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LOG = logging.getLogger(__name__)
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def load_image_driver(image_driver=None):
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"""Load an image driver module.
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Load the container image driver module specified by the image_driver
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configuration option or, if supplied, the driver name supplied as an
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argument.
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:param image_driver: container image driver name to override config opt
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:returns: a ContainerImageDriver instance
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"""
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if not image_driver:
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image_driver = CONF.default_image_driver
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if not image_driver:
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LOG.error("Container image driver option required, "
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"but not specified")
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sys.exit(1)
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LOG.info("Loading container image driver '%s'", image_driver)
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try:
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driver = stevedore.driver.DriverManager(
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"zun.image.driver",
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image_driver,
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invoke_on_load=True).driver
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if not isinstance(driver, ContainerImageDriver):
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raise Exception(_('Expected driver of type: %s') %
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six.text_type(ContainerImageDriver))
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return driver
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except Exception:
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LOG.exception("Unable to load the container image driver")
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sys.exit(1)
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class ContainerImageDriver(object):
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"""Base class for container image driver."""
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def pull_image(self, context, repo, tag, image_pull_policy):
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"""Pull an image."""
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raise NotImplementedError()
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def search_image(self, context, repo, tag, exact_match):
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"""Search an image."""
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raise NotImplementedError()
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def create_image(self, context, image_name):
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"""Create an image."""
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raise NotImplementedError()
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def update_image(self, context, img_id, container_fmt=None,
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disk_fmt=None, tag=None):
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"""Update an image."""
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raise NotImplementedError()
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def upload_image_data(self, context, img_id, data):
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"""Upload an image."""
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raise NotImplementedError()
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def delete_image(self, context, img_id):
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"""Delete an image."""
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raise NotImplementedError()
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def delete_committed_image(self, context, img_id, image_driver):
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"""Delete a committed image."""
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raise NotImplementedError()
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def delete_image_tar(self, context, image):
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"""Delete an image."""
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raise NotImplementedError()
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