fabe341771
Since this is apparently not getting into Nova it needs to be renamed so the package name won't conflict. Change-Id: Ib449e99c2a7756e46e4626a84ddb246265476bd3
119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2013 Rackspace
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# All Rights Reserved.
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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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"""
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A driver specific to OpenVz as the support for Ovz in libvirt
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is sketchy at best.
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"""
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import json
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from nova.openstack.common import log as logging
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from ovznovadriver.localization import _
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from ovznovadriver.openvz import file as ovzfile
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import os
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from oslo.config import cfg
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CONF = cfg.CONF
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LOG = logging.getLogger('ovznovadriver.openvz.file_ext.ext_storage')
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class OVZExtStorage(object):
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"""
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Local store for volume information needing to be persisted to the local
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host.
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"""
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def __init__(self, instance_id):
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"""
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:param instance_id: CTID of the container
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:return: None
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"""
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filename = '%s/%s.ext_storage' % (CONF.ovz_config_dir, instance_id)
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filename = os.path.abspath(filename)
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self.instance_id = instance_id
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self.local_store = ovzfile.OVZFile(filename, 600)
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# read the local store for the CTID or create it if it doesn't already
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# exist.
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with self.local_store:
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self.local_store.read()
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# preload volume info
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self.load_volumes()
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def load_volumes(self):
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"""
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return the contents of self.contents *after* converting it from json
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to python objects.
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:return: list
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"""
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try:
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self._volumes = json.loads(self.local_store.contents[0])
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except (ValueError, IndexError):
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self._volumes = dict()
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def add_volume(self, device, volume_info):
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"""
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Add a volume to local storage so volumes can be reconnected to in
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emergencies without nova services if need be.
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:param device: Device name
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:param volume_info: Nova volume information from block_device_map
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:return: None
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"""
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self._volumes[device] = volume_info
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def remove_volume(self, device):
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"""
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removes a volume from the volume store.
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:param device:
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:return: None
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"""
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try:
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self._volumes.pop(device)
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LOG.debug(
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_('Removed volume %(device)s from instance %(instance_id)s') %
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{'device': device, 'instance_id': self.instance_id})
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except KeyError:
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LOG.error(
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_('Volume %(device)s was not in local store for '
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'instance %(instance_id)s') %
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{'device': device, 'instance_id': self.instance_id})
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def save(self):
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"""
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Flushes contents of self._volumes to disk for persistance
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:return: None
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"""
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self.local_store.set_contents(json.dumps(self._volumes))
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with self.local_store:
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self.local_store.write()
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def volumes(self):
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"""
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Simple generator to give back the volumes in an iterable and
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adventurous way.
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:return: device name, connection info
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"""
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for key in self._volumes.keys():
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yield key, self._volumes[key]
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