def _host_find(context, session, src, dst):
"""Return the host from the xenapi host reference.
:param src: the compute host being put in maintenance (source of VMs)
:param dst: the hypervisor host reference (destination of VMs)
:return: the compute host that manages dst
"""
# NOTE: this would be a lot simpler if nova-compute stored
# FLAGS.host in the XenServer host's other-config map.
# TODO(armando-migliaccio): improve according the note above
aggregate = db.aggregate_get_by_host(context,
src,
key=pool_states.POOL_FLAG)[0]
if not aggregate:
raise exception.AggregateHostNotFound(host=src)
uuid = session.call_xenapi('host.get_record', dst)['uuid']
for compute_host, host_uuid in aggregate.metadetails.iteritems():
if host_uuid == uuid:
return compute_host
raise exception.NoValidHost(reason='Host %(host_uuid)s could not be found '
'from aggregate metadata: %(metadata)s.' % {
'host_uuid': uuid,
'metadata': aggregate.metadetails
})
def test_remove_host_with_host_not_in_aggregate(self):
side_effect = exception.AggregateHostNotFound(aggregate_id="1",
host="host1")
with mock.patch.object(self.controller.api,
'remove_host_from_aggregate',
side_effect=side_effect) as mock_rem:
self.assertRaises(exc.HTTPNotFound, eval(self.remove_host),
self.req, "1",
body={"remove_host": {"host": "host1"}})
mock_rem.assert_called_once_with(self.context, "1", "host1")
def _get_host_uuid(self):
if self.is_slave:
aggr = db.aggregate_get_by_host(context.get_admin_context(),
FLAGS.host, key=pool_states.POOL_FLAG)[0]
if not aggr:
LOG.error(_('Host is member of a pool, but DB '
'says otherwise'))
raise exception.AggregateHostNotFound()
return aggr.metadetails[FLAGS.host]
else:
with self._get_session() as session:
host_ref = session.xenapi.session.get_this_host(session.handle)
return session.xenapi.host.get_uuid(host_ref)
def _host_delete_from_db(context, aggregate_id, host):
count = 0
with db_api.api_context_manager.writer.using(context):
# Check to see if the aggregate exists
_aggregate_get_from_db(context, aggregate_id)
query = context.session.query(api_models.AggregateHost)
query = query.filter(
api_models.AggregateHost.aggregate_id == aggregate_id)
count = query.filter_by(host=host).delete()
if count == 0:
raise exception.AggregateHostNotFound(aggregate_id=aggregate_id,
host=host)
def stub_remove_host_from_aggregate(context, aggregate, host):
raise exception.AggregateHostNotFound(aggregate_id=aggregate,
host=host)