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# Copyright 2015, 2018 IBM Corp.
#
# All Rights Reserved.
#
# 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.
"""Utilities related to glance image management for the PowerVM driver."""
from nova import utils
def stream_blockdev_to_glance(context, image_api, image_id, metadata, devpath):
"""Stream the entire contents of a block device to a glance image.
:param context: Nova security context.
:param image_api: Handle to the glance image API.
:param image_id: UUID of the prepared glance image.
:param metadata: Dictionary of metadata for the image.
:param devpath: String path to device file of block device to be uploaded,
e.g. "/dev/sde".
"""
# Make the device file owned by the current user for the duration of the
# operation.
with utils.temporary_chown(devpath), open(devpath, 'rb') as stream:
# Stream it. This is synchronous.
image_api.update(context, image_id, metadata, stream)
def generate_snapshot_metadata(context, image_api, image_id, instance):
"""Generate a metadata dictionary for an instance snapshot.
:param context: Nova security context.
:param image_api: Handle to the glance image API.
:param image_id: UUID of the prepared glance image.
:param instance: The Nova instance whose disk is to be snapshotted.
:return: A dict of metadata suitable for image_api.update.
"""
image = image_api.get(context, image_id)
# TODO(esberglu): Update this to v2 metadata
metadata = {
'name': image['name'],
'status': 'active',
'disk_format': 'raw',
'container_format': 'bare',
'properties': {
'image_location': 'snapshot',
'image_state': 'available',
'owner_id': instance.project_id,
}
}
return metadata
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