Fixes backup with multiple volume backend
The backup service now keeps a dictionary of managers for each type of volume backend. If multi backend is not in use (and volume_type is None) the current volume_driver is used. Change-Id: I66e91f3ce2cffaf2e2d07edfddc08b1480e2a37c Fixes: bug 1228223
This commit is contained in:
Edward Hope-Morley
parent
0f7d937786
commit
bd5c3f5a0e
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@ -84,14 +84,14 @@ class API(base.Base):
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return backups
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def _is_backup_service_enabled(self, volume):
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def _is_backup_service_enabled(self, volume, volume_host):
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"""Check if there is an backup service available"""
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topic = CONF.backup_topic
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ctxt = context.get_admin_context()
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services = self.db.service_get_all_by_topic(ctxt, topic)
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for srv in services:
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if (srv['availability_zone'] == volume['availability_zone'] and
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srv['host'] == volume['host'] and not srv['disabled'] and
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srv['host'] == volume_host and not srv['disabled'] and
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utils.service_is_up(srv)):
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return True
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return False
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@ -104,7 +104,8 @@ class API(base.Base):
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if volume['status'] != "available":
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msg = _('Volume to be backed up must be available')
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raise exception.InvalidVolume(reason=msg)
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if not self._is_backup_service_enabled(volume):
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volume_host = volume['host'].partition('@')[0]
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if not self._is_backup_service_enabled(volume, volume_host):
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raise exception.ServiceNotFound(service_id='cinder-backup')
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self.db.volume_update(context, volume_id, {'status': 'backing-up'})
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@ -117,9 +118,7 @@ class API(base.Base):
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'status': 'creating',
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'container': container,
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'size': volume['size'],
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# TODO(DuncanT): This will need de-managling once
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# multi-backend lands
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'host': volume['host'], }
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'host': volume_host, }
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backup = self.db.backup_create(context, options)
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@ -43,7 +43,6 @@ from cinder.openstack.common import importutils
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from cinder.openstack.common import log as logging
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from cinder import utils
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LOG = logging.getLogger(__name__)
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backup_manager_opts = [
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@ -70,12 +69,10 @@ class BackupManager(manager.SchedulerDependentManager):
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def __init__(self, service_name=None, *args, **kwargs):
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self.service = importutils.import_module(self.driver_name)
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self.az = CONF.storage_availability_zone
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self.volume_manager = importutils.import_object(
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CONF.volume_manager)
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self.driver = self.volume_manager.driver
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self.volume_managers = {}
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self._setup_volume_drivers()
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super(BackupManager, self).__init__(service_name='backup',
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*args, **kwargs)
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self.driver.db = self.db
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@property
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def driver_name(self):
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@ -90,40 +87,114 @@ class BackupManager(manager.SchedulerDependentManager):
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return mapper[service]
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return service
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def init_host(self):
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"""Do any initialization that needs to be run if this is a
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standalone service.
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"""
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@property
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def driver(self):
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return self._get_driver()
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ctxt = context.get_admin_context()
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LOG.info(_("Starting volume driver %(driver_name)s (%(version)s)") %
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{'driver_name': self.driver.__class__.__name__,
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'version': self.driver.get_version()})
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def _get_volume_backend(self, host=None, allow_null_host=False):
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if host is None:
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if not allow_null_host:
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msg = _("NULL host not allowed for volume backend lookup.")
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raise exception.BackupFailedToGetVolumeBackend(msg)
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else:
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LOG.debug(_("Checking hostname '%s' for backend info.") % (host))
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part = host.partition('@')
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if (part[1] == '@') and (part[2] != ''):
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backend = part[2]
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LOG.debug("Got backend '%s'." % (backend))
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return backend
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LOG.info(_("Backend not found in hostname (%s) so using default.") %
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(host))
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if 'default' not in self.volume_managers:
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# For multi-backend we just pick the top of the list.
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return self.volume_managers.keys()[0]
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return 'default'
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def _get_manager(self, backend):
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LOG.debug(_("Manager requested for volume_backend '%s'.") %
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(backend))
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if backend is None:
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LOG.debug(_("Fetching default backend."))
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backend = self._get_volume_backend(allow_null_host=True)
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if backend not in self.volume_managers:
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msg = (_("Volume manager for backend '%s' does not exist.") %
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(backend))
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raise exception.BackupFailedToGetVolumeBackend(msg)
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return self.volume_managers[backend]
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def _get_driver(self, backend=None):
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LOG.debug(_("Driver requested for volume_backend '%s'.") %
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(backend))
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if backend is None:
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LOG.debug(_("Fetching default backend."))
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backend = self._get_volume_backend(allow_null_host=True)
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mgr = self._get_manager(backend)
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mgr.driver.db = self.db
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return mgr.driver
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def _setup_volume_drivers(self):
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if CONF.enabled_backends:
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for backend in CONF.enabled_backends:
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host = "%s@%s" % (CONF.host, backend)
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mgr = importutils.import_object(CONF.volume_manager,
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host=host,
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service_name=backend)
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config = mgr.configuration
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backend_name = config.safe_get('volume_backend_name')
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LOG.debug(_("Registering backend %(backend)s (host=%(host)s "
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"backend_name=%(backend_name)s).") %
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{'backend': backend, 'host': host,
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'backend_name': backend_name})
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self.volume_managers[backend] = mgr
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else:
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default = importutils.import_object(CONF.volume_manager)
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LOG.debug(_("Registering default backend %s.") % (default))
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self.volume_managers['default'] = default
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def _init_volume_driver(self, ctxt, driver):
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LOG.info(_("Starting volume driver %(driver_name)s (%(version)s).") %
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{'driver_name': driver.__class__.__name__,
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'version': driver.get_version()})
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try:
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self.driver.do_setup(ctxt)
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self.driver.check_for_setup_error()
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driver.do_setup(ctxt)
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driver.check_for_setup_error()
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except Exception as ex:
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LOG.error(_("Error encountered during "
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"initialization of driver: %(name)s") %
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{'name': self.driver.__class__.__name__})
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LOG.error(_("Error encountered during initialization of driver: "
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"%(name)s.") %
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{'name': driver.__class__.__name__})
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LOG.exception(ex)
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# we don't want to continue since we failed
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# to initialize the driver correctly.
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return
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self.driver.set_initialized()
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driver.set_initialized()
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LOG.info(_("Cleaning up incomplete backup operations"))
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def init_host(self):
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"""Do any initialization that needs to be run if this is a
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standalone service.
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"""
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ctxt = context.get_admin_context()
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for mgr in self.volume_managers.itervalues():
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self._init_volume_driver(ctxt, mgr.driver)
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LOG.info(_("Cleaning up incomplete backup operations."))
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volumes = self.db.volume_get_all_by_host(ctxt, self.host)
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for volume in volumes:
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backend = self._get_volume_backend(host=volume['host'])
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if volume['status'] == 'backing-up':
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LOG.info(_('Resetting volume %s to available '
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'(was backing-up)') % volume['id'])
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self.volume_manager.detach_volume(ctxt, volume['id'])
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'(was backing-up).') % volume['id'])
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mgr = self._get_manager(backend)
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mgr.detach_volume(ctxt, volume['id'])
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if volume['status'] == 'restoring-backup':
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LOG.info(_('Resetting volume %s to error_restoring '
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'(was restoring-backup)') % volume['id'])
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self.volume_manager.detach_volume(ctxt, volume['id'])
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'(was restoring-backup).') % volume['id'])
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mgr = self._get_manager(backend)
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mgr.detach_volume(ctxt, volume['id'])
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self.db.volume_update(ctxt, volume['id'],
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{'status': 'error_restoring'})
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@ -132,18 +203,18 @@ class BackupManager(manager.SchedulerDependentManager):
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backups = self.db.backup_get_all_by_host(ctxt, self.host)
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for backup in backups:
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if backup['status'] == 'creating':
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LOG.info(_('Resetting backup %s to error '
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'(was creating)') % backup['id'])
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LOG.info(_('Resetting backup %s to error (was creating).')
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% backup['id'])
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err = 'incomplete backup reset on manager restart'
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self.db.backup_update(ctxt, backup['id'], {'status': 'error',
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'fail_reason': err})
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if backup['status'] == 'restoring':
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LOG.info(_('Resetting backup %s to available '
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'(was restoring)') % backup['id'])
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LOG.info(_('Resetting backup %s to available (was restoring).')
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% backup['id'])
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self.db.backup_update(ctxt, backup['id'],
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{'status': 'available'})
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if backup['status'] == 'deleting':
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LOG.info(_('Resuming delete on backup: %s') % backup['id'])
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LOG.info(_('Resuming delete on backup: %s.') % backup['id'])
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self.delete_backup(ctxt, backup['id'])
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@utils.require_driver_initialized
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@ -152,9 +223,11 @@ class BackupManager(manager.SchedulerDependentManager):
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backup = self.db.backup_get(context, backup_id)
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volume_id = backup['volume_id']
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volume = self.db.volume_get(context, volume_id)
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LOG.info(_('create_backup started, backup: %(backup_id)s for '
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'volume: %(volume_id)s') %
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LOG.info(_('Create backup started, backup: %(backup_id)s '
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'volume: %(volume_id)s.') %
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{'backup_id': backup_id, 'volume_id': volume_id})
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backend = self._get_volume_backend(host=volume['host'])
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self.db.backup_update(context, backup_id, {'host': self.host,
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'service':
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self.driver_name})
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@ -162,8 +235,8 @@ class BackupManager(manager.SchedulerDependentManager):
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expected_status = 'backing-up'
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actual_status = volume['status']
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if actual_status != expected_status:
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err = _('create_backup aborted, expected volume status '
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'%(expected_status)s but got %(actual_status)s') % {
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err = _('Create backup aborted, expected volume status '
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'%(expected_status)s but got %(actual_status)s.') % {
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'expected_status': expected_status,
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'actual_status': actual_status,
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}
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@ -174,8 +247,8 @@ class BackupManager(manager.SchedulerDependentManager):
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expected_status = 'creating'
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actual_status = backup['status']
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if actual_status != expected_status:
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err = _('create_backup aborted, expected backup status '
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'%(expected_status)s but got %(actual_status)s') % {
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err = _('Create backup aborted, expected backup status '
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'%(expected_status)s but got %(actual_status)s.') % {
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'expected_status': expected_status,
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'actual_status': actual_status,
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}
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@ -186,7 +259,8 @@ class BackupManager(manager.SchedulerDependentManager):
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try:
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backup_service = self.service.get_backup_driver(context)
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self.driver.backup_volume(context, backup, backup_service)
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self._get_driver(backend).backup_volume(context, backup,
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backup_service)
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except Exception as err:
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with excutils.save_and_reraise_exception():
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self.db.volume_update(context, volume_id,
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@ -200,24 +274,26 @@ class BackupManager(manager.SchedulerDependentManager):
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'size': volume['size'],
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'availability_zone':
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self.az})
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LOG.info(_('create_backup finished. backup: %s'), backup_id)
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LOG.info(_('Create backup finished. backup: %s.'), backup_id)
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@utils.require_driver_initialized
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def restore_backup(self, context, backup_id, volume_id):
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"""Restore volume backups from configured backup service."""
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LOG.info(_('restore_backup started, restoring backup: %(backup_id)s'
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' to volume: %(volume_id)s') %
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LOG.info(_('Restore backup started, backup: %(backup_id)s '
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'volume: %(volume_id)s.') %
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{'backup_id': backup_id, 'volume_id': volume_id})
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backup = self.db.backup_get(context, backup_id)
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volume = self.db.volume_get(context, volume_id)
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backend = self._get_volume_backend(host=volume['host'])
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self.db.backup_update(context, backup_id, {'host': self.host})
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expected_status = 'restoring-backup'
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actual_status = volume['status']
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if actual_status != expected_status:
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err = _('restore_backup aborted, expected volume status '
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'%(expected_status)s but got %(actual_status)s') % {
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err = _('Restore backup aborted: expected volume status '
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'%(expected_status)s but got %(actual_status)s.') % {
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'expected_status': expected_status,
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'actual_status': actual_status
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}
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@ -227,8 +303,8 @@ class BackupManager(manager.SchedulerDependentManager):
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expected_status = 'restoring'
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actual_status = backup['status']
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if actual_status != expected_status:
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err = _('restore_backup aborted, expected backup status '
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'%(expected_status)s but got %(actual_status)s') % {
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err = _('Restore backup aborted: expected backup status '
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'%(expected_status)s but got %(actual_status)s.') % {
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'expected_status': expected_status,
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'actual_status': actual_status
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}
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@ -238,18 +314,18 @@ class BackupManager(manager.SchedulerDependentManager):
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raise exception.InvalidBackup(reason=err)
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if volume['size'] > backup['size']:
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LOG.warn('volume: %s, size: %d is larger than backup: %s, '
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'size: %d, continuing with restore',
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LOG.warn('Volume: %s, size: %d is larger than backup: %s, '
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'size: %d, continuing with restore.',
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volume['id'], volume['size'],
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backup['id'], backup['size'])
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backup_service = self._map_service_to_driver(backup['service'])
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configured_service = self.driver_name
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if backup_service != configured_service:
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err = _('restore_backup aborted, the backup service currently'
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err = _('Restore backup aborted, the backup service currently'
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' configured [%(configured_service)s] is not the'
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' backup service that was used to create this'
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' backup [%(backup_service)s]') % {
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' backup [%(backup_service)s].') % {
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'configured_service': configured_service,
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'backup_service': backup_service,
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}
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@ -259,8 +335,9 @@ class BackupManager(manager.SchedulerDependentManager):
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try:
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backup_service = self.service.get_backup_driver(context)
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self.driver.restore_backup(context, backup, volume,
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backup_service)
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self._get_driver(backend).restore_backup(context, backup,
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volume,
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backup_service)
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except Exception as err:
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with excutils.save_and_reraise_exception():
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self.db.volume_update(context, volume_id,
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@ -270,22 +347,22 @@ class BackupManager(manager.SchedulerDependentManager):
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self.db.volume_update(context, volume_id, {'status': 'available'})
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self.db.backup_update(context, backup_id, {'status': 'available'})
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LOG.info(_('restore_backup finished, backup: %(backup_id)s restored'
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' to volume: %(volume_id)s') %
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LOG.info(_('Restore backup finished, backup %(backup_id)s restored'
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' to volume %(volume_id)s.') %
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{'backup_id': backup_id, 'volume_id': volume_id})
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@utils.require_driver_initialized
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def delete_backup(self, context, backup_id):
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"""Delete volume backup from configured backup service."""
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LOG.info(_('delete_backup started, backup: %s'), backup_id)
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LOG.info(_('Delete backup started, backup: %s.'), backup_id)
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backup = self.db.backup_get(context, backup_id)
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self.db.backup_update(context, backup_id, {'host': self.host})
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expected_status = 'deleting'
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actual_status = backup['status']
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if actual_status != expected_status:
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err = _('delete_backup aborted, expected backup status '
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'%(expected_status)s but got %(actual_status)s') % {
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err = _('Delete_backup aborted, expected backup status '
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'%(expected_status)s but got %(actual_status)s.') % {
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'expected_status': expected_status,
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'actual_status': actual_status,
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}
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@ -297,10 +374,10 @@ class BackupManager(manager.SchedulerDependentManager):
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if backup_service is not None:
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configured_service = self.driver_name
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if backup_service != configured_service:
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err = _('delete_backup aborted, the backup service currently'
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err = _('Delete backup aborted, the backup service currently'
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' configured [%(configured_service)s] is not the'
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' backup service that was used to create this'
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' backup [%(backup_service)s]') % {
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' backup [%(backup_service)s].') % {
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'configured_service': configured_service,
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'backup_service': backup_service,
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}
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@ -320,4 +397,4 @@ class BackupManager(manager.SchedulerDependentManager):
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context = context.elevated()
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self.db.backup_destroy(context, backup_id)
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LOG.info(_('delete_backup finished, backup %s deleted'), backup_id)
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LOG.info(_('Delete backup finished, backup %s deleted.'), backup_id)
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@ -546,6 +546,10 @@ class BackupNotFound(NotFound):
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message = _("Backup %(backup_id)s could not be found.")
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class BackupFailedToGetVolumeBackend(NotFound):
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message = _("Failed to identify volume backend.")
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class InvalidBackup(Invalid):
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message = _("Invalid backup: %(reason)s")
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@ -503,64 +503,74 @@ class BackupsAPITestCase(test.TestCase):
|
|||
def empty_service(ctxt, topic):
|
||||
return []
|
||||
|
||||
test_host = 'test_host'
|
||||
alt_host = 'strange_host'
|
||||
|
||||
#service host not match with volume's host
|
||||
def host_not_match(context, topic):
|
||||
return [{'availability_zone': "fake_az", 'host': 'strange_host',
|
||||
return [{'availability_zone': "fake_az", 'host': alt_host,
|
||||
'disabled': 0, 'updated_at': timeutils.utcnow()}]
|
||||
|
||||
#service az not match with volume's az
|
||||
def az_not_match(context, topic):
|
||||
return [{'availability_zone': "strange_az", 'host': 'test_host',
|
||||
return [{'availability_zone': "strange_az", 'host': test_host,
|
||||
'disabled': 0, 'updated_at': timeutils.utcnow()}]
|
||||
|
||||
#service disabled
|
||||
def disabled_service(context, topic):
|
||||
return [{'availability_zone': "fake_az", 'host': 'test_host',
|
||||
return [{'availability_zone': "fake_az", 'host': test_host,
|
||||
'disabled': 1, 'updated_at': timeutils.utcnow()}]
|
||||
|
||||
#dead service that last reported at 20th centry
|
||||
def dead_service(context, topic):
|
||||
return [{'availability_zone': "fake_az", 'host': 'strange_host',
|
||||
return [{'availability_zone': "fake_az", 'host': alt_host,
|
||||
'disabled': 0, 'updated_at': '1989-04-16 02:55:44'}]
|
||||
|
||||
#first service's host not match but second one works.
|
||||
def multi_services(context, topic):
|
||||
return [{'availability_zone': "fake_az", 'host': 'strange_host',
|
||||
return [{'availability_zone': "fake_az", 'host': alt_host,
|
||||
'disabled': 0, 'updated_at': timeutils.utcnow()},
|
||||
{'availability_zone': "fake_az", 'host': 'test_host',
|
||||
{'availability_zone': "fake_az", 'host': test_host,
|
||||
'disabled': 0, 'updated_at': timeutils.utcnow()}]
|
||||
|
||||
volume_id = utils.create_volume(self.context, size=2)['id']
|
||||
volume_id = utils.create_volume(self.context, size=2,
|
||||
host=test_host)['id']
|
||||
volume = self.volume_api.get(context.get_admin_context(), volume_id)
|
||||
|
||||
#test empty service
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', empty_service)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
False)
|
||||
|
||||
#test host not match service
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', host_not_match)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
False)
|
||||
|
||||
#test az not match service
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', az_not_match)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
False)
|
||||
|
||||
#test disabled service
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', disabled_service)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
False)
|
||||
|
||||
#test dead service
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', dead_service)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
False)
|
||||
|
||||
#test multi services and the last service matches
|
||||
self.stubs.Set(cinder.db, 'service_get_all_by_topic', multi_services)
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume),
|
||||
self.assertEqual(self.backup_api._is_backup_service_enabled(volume,
|
||||
test_host),
|
||||
True)
|
||||
|
||||
def test_delete_backup_available(self):
|
||||
|
|
|
|||
Loading…
Reference in New Issue