391 lines
17 KiB
Python
391 lines
17 KiB
Python
# 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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from functools import partial
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from karbor.common import constants
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from karbor import exception
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from karbor.services.protection.client_factory import ClientFactory
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from karbor.services.protection import protection_plugin
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from karbor.services.protection.protection_plugins.image \
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import image_plugin_schemas as image_schemas
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from karbor.services.protection.protection_plugins import utils
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from oslo_config import cfg
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from oslo_log import log as logging
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image_backup_opts = [
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cfg.IntOpt('backup_image_object_size',
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default=65536*10,
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help='The size in bytes of instance image objects. '
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'The value must be a multiple of 65536('
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'the size of image\'s chunk).'),
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cfg.IntOpt('poll_interval', default=10,
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help='Poll interval for image status'),
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cfg.BoolOpt('enable_server_snapshot',
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default=True,
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help='Enable server snapshot when server is '
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'the parent resource of image')
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]
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LOG = logging.getLogger(__name__)
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def get_image_status(glance_client, image_id):
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LOG.debug('Polling image (image_id: %s)', image_id)
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try:
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image = glance_client.images.get(image_id)
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status = image.get('status')
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except exception.NotFound:
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status = 'not-found'
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LOG.debug('Polled image (image_id: %s) status: %s',
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image_id, status)
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return status
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def get_server_status(nova_client, server_id):
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LOG.debug('Polling server (server_id: %s)', server_id)
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try:
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server = nova_client.servers.get(server_id)
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status = server.status
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except exception.NotFound:
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status = 'not-found'
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LOG.debug('Polled server (server_id: %s) status: %s', server_id, status)
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return status
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class ProtectOperation(protection_plugin.Operation):
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def __init__(self, backup_image_object_size,
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poll_interval, enable_server_snapshot):
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super(ProtectOperation, self).__init__()
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self._data_block_size_bytes = backup_image_object_size
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self._interval = poll_interval
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self._enable_server_snapshot = enable_server_snapshot
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def on_main(self, checkpoint, resource, context, parameters, **kwargs):
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LOG.debug('Start creating image backup, resource info: %s',
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resource.to_dict())
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resource_id = resource.id
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bank_section = checkpoint.get_resource_bank_section(resource_id)
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glance_client = ClientFactory.create_client('glance', context)
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_PROTECTING)
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resource_definition = {'resource_id': resource_id}
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if resource.extra_info and self._enable_server_snapshot:
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image_id = self._create_server_snapshot(context, glance_client,
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parameters, resource,
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resource_definition,
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resource_id)
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need_delete_temp_image = True
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else:
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image_id = resource_id
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need_delete_temp_image = False
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LOG.info("Creating image backup, image_id: %s.", image_id)
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try:
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image_info = glance_client.images.get(image_id)
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if image_info.status != "active":
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is_success = utils.status_poll(
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partial(get_image_status, glance_client, image_info.id),
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interval=self._interval, success_statuses={'active'},
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ignore_statuses={'queued', 'saving'},
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failure_statuses={'killed', 'deleted', 'pending_delete',
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'deactivated', 'NotFound'}
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)
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if is_success is not True:
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LOG.error("The status of image (id: %s) is invalid.",
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image_id)
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason="The status of image is invalid.",
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resource_id=image_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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image_metadata = {
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"disk_format": image_info.disk_format,
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"container_format": image_info.container_format,
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"checksum": image_info.checksum,
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}
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resource_definition["image_metadata"] = image_metadata
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bank_section.update_object("metadata", resource_definition)
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except Exception as err:
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LOG.error("Create image backup failed, image_id: %s.", image_id)
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_ERROR)
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason=err,
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resource_id=image_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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self._create_backup(glance_client, bank_section, image_id)
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if need_delete_temp_image:
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try:
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glance_client.images.delete(image_id)
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except Exception as error:
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LOG.warning('Failed to delete temporary image: %s', error)
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else:
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LOG.debug('Delete temporary image(%s) success', image_id)
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def _create_server_snapshot(self, context, glance_client, parameters,
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resource, resource_definition, resource_id):
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server_id = resource.extra_info.get('server_id')
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resource_definition['resource_id'] = resource_id
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resource_definition['server_id'] = server_id
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nova_client = ClientFactory.create_client('nova', context)
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is_success = utils.status_poll(
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partial(get_server_status, nova_client, server_id),
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interval=self._interval,
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success_statuses={'ACTIVE', 'STOPPED', 'SUSPENDED',
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'PAUSED'},
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failure_statuses={'DELETED', 'ERROR', 'RESIZED', 'SHELVED',
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'SHELVED_OFFLOADED', 'SOFT_DELETED',
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'RESCUED', 'not-found'},
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ignore_statuses={'BUILDING'},
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)
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if not is_success:
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason='The parent server of the image is not in valid'
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' status',
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resource_id=resource_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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temp_image_name = 'Temp_image_name_for_karbor' + server_id
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try:
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image_uuid = nova_client.servers.create_image(
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server_id, temp_image_name, parameters)
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except Exception as e:
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msg = "Failed to create the server snapshot: %s" % e
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LOG.exception(msg)
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason=msg,
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resource_id=resource_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE
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)
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else:
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is_success = utils.status_poll(
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partial(get_image_status, glance_client, image_uuid),
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interval=self._interval,
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success_statuses={'active'},
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failure_statuses={'killed', 'deleted', 'pending_delete',
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'deactivated'},
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ignore_statuses={'queued', 'saving', 'uploading'})
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if not is_success:
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msg = "Image has been created, but fail to become " \
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"active, so delete it and raise exception."
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LOG.error(msg)
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glance_client.images.delete(image_uuid)
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image_uuid = None
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if not image_uuid:
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason="Create parent server snapshot failed.",
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resource_id=resource_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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return image_uuid
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def _create_backup(self, glance_client, bank_section, image_id):
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try:
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chunks_num = utils.backup_image_to_bank(
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glance_client,
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image_id, bank_section,
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self._data_block_size_bytes
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)
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# Save the chunks_num to metadata
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resource_definition = bank_section.get_object("metadata")
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if resource_definition is not None:
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resource_definition["chunks_num"] = chunks_num
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bank_section.update_object("metadata", resource_definition)
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# Update resource_definition backup_status
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_AVAILABLE)
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LOG.info('Protecting image (id: %s) to bank completed '
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'successfully', image_id)
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except Exception as err:
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# update resource_definition backup_status
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LOG.exception('Protecting image (id: %s) to bank failed.',
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image_id)
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_ERROR)
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raise exception.CreateResourceFailed(
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name="Image Backup",
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reason=err,
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resource_id=image_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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class DeleteOperation(protection_plugin.Operation):
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def on_main(self, checkpoint, resource, context, parameters, **kwargs):
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image_id = resource.id
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bank_section = checkpoint.get_resource_bank_section(image_id)
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LOG.info("Deleting image backup, image_id: %s.", image_id)
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try:
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_DELETING)
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objects = bank_section.list_objects()
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for obj in objects:
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if obj == "status":
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continue
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bank_section.delete_object(obj)
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_DELETED)
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except Exception as err:
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LOG.error("delete image backup failed, image_id: %s.", image_id)
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bank_section.update_object("status",
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constants.RESOURCE_STATUS_ERROR)
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raise exception.DeleteResourceFailed(
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name="Image Backup",
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reason=err,
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resource_id=image_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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class RestoreOperation(protection_plugin.Operation):
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def __init__(self, poll_interval, enable_server_snapshot):
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super(RestoreOperation, self).__init__()
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self._interval = poll_interval
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self._enable_server_snapshot = enable_server_snapshot
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def on_main(self, checkpoint, resource, context, parameters, **kwargs):
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original_image_id = resource.id
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name = parameters.get("restore_name", "karbor-restore-image")
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LOG.info("Restoring image backup, image_id: %s.", original_image_id)
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glance_client = ClientFactory.create_client('glance', context)
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bank_section = checkpoint.get_resource_bank_section(original_image_id)
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image_info = None
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try:
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image_info = utils.restore_image_from_bank(
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glance_client, bank_section, name)
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if image_info.status != "active":
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is_success = utils.status_poll(
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partial(get_image_status, glance_client, image_info.id),
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interval=self._interval, success_statuses={'active'},
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ignore_statuses={'queued', 'saving'},
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failure_statuses={'killed', 'deleted', 'pending_delete',
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'deactivated', 'not-found'}
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)
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if is_success is not True:
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LOG.error('The status of image is invalid. status:%s',
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image_info.status)
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raise exception.RestoreResourceFailed(
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name="Image Backup",
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resource_id=image_info.id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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kwargs.get("new_resources")[original_image_id] = image_info.id
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except Exception as e:
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LOG.error("Restore image backup failed, image_id: %s.",
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original_image_id)
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if image_info is not None and hasattr(image_info, 'id'):
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LOG.info("Delete the failed image, image_id: %s.",
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image_info.id)
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glance_client.images.delete(image_info.id)
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raise exception.RestoreResourceFailed(
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name="Image Backup",
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reason=e, resource_id=original_image_id,
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resource_type=constants.IMAGE_RESOURCE_TYPE)
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LOG.info("Finish restoring image backup, image_id: %s.",
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original_image_id)
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class VerifyOperation(protection_plugin.Operation):
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def __init__(self):
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super(VerifyOperation, self).__init__()
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def on_main(self, checkpoint, resource, context, parameters, **kwargs):
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original_image_id = resource.id
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bank_section = checkpoint.get_resource_bank_section(
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original_image_id)
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LOG.info('Verifying the image backup, server_id: %s',
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original_image_id)
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update_method = partial(
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utils.update_resource_verify_result,
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kwargs.get('verify'), resource.type, original_image_id)
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backup_status = bank_section.get_object("status")
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if backup_status == constants.RESOURCE_STATUS_AVAILABLE:
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update_method(constants.RESOURCE_STATUS_AVAILABLE)
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else:
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reason = ('The status of image backup status is %s.'
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% backup_status)
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update_method(backup_status, reason)
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raise exception.VerifyResourceFailed(
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name="Image backup",
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reason=reason,
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resource_id=original_image_id,
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resource_type=resource.type)
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class GlanceProtectionPlugin(protection_plugin.ProtectionPlugin):
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_SUPPORT_RESOURCE_TYPES = [constants.IMAGE_RESOURCE_TYPE]
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def __init__(self, config=None):
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super(GlanceProtectionPlugin, self).__init__(config)
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self._config.register_opts(image_backup_opts,
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'image_backup_plugin')
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self._plugin_config = self._config.image_backup_plugin
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self._data_block_size_bytes = (
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self._plugin_config.backup_image_object_size)
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self._poll_interval = self._plugin_config.poll_interval
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self._enable_server_snapshot = (
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self._plugin_config.enable_server_snapshot)
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if self._data_block_size_bytes % 65536 != 0 or (
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self._data_block_size_bytes <= 0):
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raise exception.InvalidParameterValue(
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err="The value of CONF.backup_image_object_size "
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"is invalid!")
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@classmethod
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def get_supported_resources_types(cls):
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return cls._SUPPORT_RESOURCE_TYPES
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@classmethod
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def get_options_schema(cls, resources_type):
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return image_schemas.OPTIONS_SCHEMA
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@classmethod
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def get_restore_schema(cls, resources_type):
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return image_schemas.RESTORE_SCHEMA
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@classmethod
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def get_verify_schema(cls, resources_type):
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return image_schemas.VERIFY_SCHEMA
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@classmethod
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def get_saved_info_schema(cls, resources_type):
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return image_schemas.SAVED_INFO_SCHEMA
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@classmethod
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def get_saved_info(cls, metadata_store, resource):
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pass
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def get_protect_operation(self, resource):
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return ProtectOperation(self._data_block_size_bytes,
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self._poll_interval,
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self._enable_server_snapshot)
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def get_restore_operation(self, resource):
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return RestoreOperation(self._poll_interval,
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self._enable_server_snapshot)
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def get_verify_operation(self, resource):
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return VerifyOperation()
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def get_delete_operation(self, resource):
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return DeleteOperation()
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