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# Copyright 2011 OpenStack Foundation
# Copyright 2013 IBM Corp.
#
# 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.
from oslo_log import log as logging
from oslo_utils import excutils
from oslo_utils import strutils
from webob import exc
from nova.api.openstack import api_version_request
from nova.api.openstack import common
from nova.api.openstack.compute.schemas import migrate_server
from nova.api.openstack import wsgi
from nova.api import validation
from nova import compute
from nova import exception
from nova.i18n import _
from nova import network
from nova.policies import migrate_server as ms_policies
LOG = logging.getLogger(__name__)
class MigrateServerController(wsgi.Controller):
def __init__(self, *args, **kwargs):
super(MigrateServerController, self).__init__(*args, **kwargs)
self.compute_api = compute.API()
self.network_api = network.API()
@wsgi.response(202)
@wsgi.expected_errors((400, 403, 404, 409))
@wsgi.action('migrate')
@validation.schema(migrate_server.migrate_v2_56, "2.56")
def _migrate(self, req, id, body):
"""Permit admins to migrate a server to a new host."""
context = req.environ['nova.context']
context.can(ms_policies.POLICY_ROOT % 'migrate')
host_name = None
if (api_version_request.is_supported(req, min_version='2.56') and
body['migrate'] is not None):
host_name = body['migrate'].get('host')
instance = common.get_instance(self.compute_api, context, id,
expected_attrs=['flavor'])
# We could potentially move this check to conductor and avoid the
# extra API call to neutron when we support move operations with ports
# having resource requests.
if (common.instance_has_port_with_resource_request(
instance.uuid, self.network_api) and not
common.supports_port_resource_request_during_move(req)):
msg = _("The migrate action on a server with ports having "
"resource requests, like a port with a QoS minimum "
"bandwidth policy, is not supported with this "
"microversion")
raise exc.HTTPBadRequest(explanation=msg)
try:
self.compute_api.resize(req.environ['nova.context'], instance,
host_name=host_name)
except (exception.TooManyInstances, exception.QuotaError) as e:
raise exc.HTTPForbidden(explanation=e.format_message())
except (exception.InstanceIsLocked,
exception.CannotMigrateWithTargetHost,
exception.AllocationMoveFailed) as e:
raise exc.HTTPConflict(explanation=e.format_message())
except exception.InstanceInvalidState as state_error:
common.raise_http_conflict_for_instance_invalid_state(state_error,
'migrate', id)
except exception.InstanceNotFound as e:
raise exc.HTTPNotFound(explanation=e.format_message())
except (exception.NoValidHost, exception.ComputeHostNotFound,
exception.CannotMigrateToSameHost) as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
@wsgi.response(202)
@wsgi.expected_errors((400, 404, 409))
@wsgi.action('os-migrateLive')
@validation.schema(migrate_server.migrate_live, "2.0", "2.24")
@validation.schema(migrate_server.migrate_live_v2_25, "2.25", "2.29")
@validation.schema(migrate_server.migrate_live_v2_30, "2.30", "2.67")
@validation.schema(migrate_server.migrate_live_v2_68, "2.68")
def _migrate_live(self, req, id, body):
"""Permit admins to (live) migrate a server to a new host."""
context = req.environ["nova.context"]
context.can(ms_policies.POLICY_ROOT % 'migrate_live')
host = body["os-migrateLive"]["host"]
block_migration = body["os-migrateLive"]["block_migration"]
force = None
async_ = api_version_request.is_supported(req, min_version='2.34')
if api_version_request.is_supported(req, min_version='2.30'):
force = self._get_force_param_for_live_migration(body, host)
if api_version_request.is_supported(req, min_version='2.25'):
if block_migration == 'auto':
block_migration = None
else:
block_migration = strutils.bool_from_string(block_migration,
strict=True)
disk_over_commit = None
else:
disk_over_commit = body["os-migrateLive"]["disk_over_commit"]
block_migration = strutils.bool_from_string(block_migration,
strict=True)
disk_over_commit = strutils.bool_from_string(disk_over_commit,
strict=True)
# NOTE(stephenfin): we need 'numa_topology' because of the
# 'LiveMigrationTask._check_instance_has_no_numa' check in the
# conductor
instance = common.get_instance(self.compute_api, context, id,
expected_attrs=['numa_topology'])
# We could potentially move this check to conductor and avoid the
# extra API call to neutron when we support move operations with ports
# having resource requests.
if (common.instance_has_port_with_resource_request(
instance.uuid, self.network_api) and not
common.supports_port_resource_request_during_move(req)):
msg = _("The os-migrateLive action on a server with ports having "
"resource requests, like a port with a QoS minimum "
"bandwidth policy, is not supported with this "
"microversion")
raise exc.HTTPBadRequest(explanation=msg)
try:
self.compute_api.live_migrate(context, instance, block_migration,
disk_over_commit, host, force,
async_)
except exception.InstanceUnknownCell as e:
raise exc.HTTPNotFound(explanation=e.format_message())
except (exception.NoValidHost,
exception.ComputeServiceUnavailable,
exception.InvalidHypervisorType,
exception.InvalidCPUInfo,
exception.UnableToMigrateToSelf,
exception.DestinationHypervisorTooOld,
exception.InvalidLocalStorage,
exception.InvalidSharedStorage,
exception.HypervisorUnavailable,
exception.MigrationPreCheckError) as ex:
if async_:
with excutils.save_and_reraise_exception():
LOG.error("Unexpected exception received from "
"conductor during pre-live-migration checks "
"'%(ex)s'", {'ex': ex})
else:
raise exc.HTTPBadRequest(explanation=ex.format_message())
except exception.InstanceIsLocked as e:
raise exc.HTTPConflict(explanation=e.format_message())
except exception.ComputeHostNotFound as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
except exception.InstanceInvalidState as state_error:
common.raise_http_conflict_for_instance_invalid_state(state_error,
'os-migrateLive', id)
def _get_force_param_for_live_migration(self, body, host):
force = body["os-migrateLive"].get("force", False)
force = strutils.bool_from_string(force, strict=True)
if force is True and not host:
message = _("Can't force to a non-provided destination")
raise exc.HTTPBadRequest(explanation=message)
return force
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