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# Copyright 2013 Rackspace Hosting
#
# 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.
"""The shelved mode extension."""
from oslo_log import log as logging
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 shelve as shelve_schemas
from nova.api.openstack import wsgi
from nova.api import validation
from nova.compute import api as compute
from nova import exception
from nova.policies import shelve as shelve_policies
LOG = logging.getLogger(__name__)
class ShelveController(wsgi.Controller):
def __init__(self):
super(ShelveController, self).__init__()
self.compute_api = compute.API()
@wsgi.response(202)
@wsgi.expected_errors((404, 403, 409, 400))
@wsgi.action('shelve')
def _shelve(self, req, id, body):
"""Move an instance into shelved mode."""
context = req.environ["nova.context"]
instance = common.get_instance(self.compute_api, context, id)
context.can(shelve_policies.POLICY_ROOT % 'shelve',
target={'user_id': instance.user_id,
'project_id': instance.project_id})
try:
self.compute_api.shelve(context, instance)
except (
exception.InstanceIsLocked,
exception.UnexpectedTaskStateError,
) 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,
'shelve', id)
except exception.ForbiddenPortsWithAccelerator as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
@wsgi.response(202)
@wsgi.expected_errors((400, 404, 409))
@wsgi.action('shelveOffload')
def _shelve_offload(self, req, id, body):
"""Force removal of a shelved instance from the compute node."""
context = req.environ["nova.context"]
instance = common.get_instance(self.compute_api, context, id)
context.can(shelve_policies.POLICY_ROOT % 'shelve_offload',
target={'user_id': instance.user_id,
'project_id': instance.project_id})
try:
self.compute_api.shelve_offload(context, instance)
except exception.InstanceIsLocked 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,
'shelveOffload',
id)
except exception.ForbiddenPortsWithAccelerator as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
@wsgi.response(202)
@wsgi.expected_errors((400, 404, 409))
@wsgi.action('unshelve')
# In microversion 2.77 we support specifying 'availability_zone' to
# unshelve a server. But before 2.77 there is no request body
# schema validation (because of body=null).
@validation.schema(
shelve_schemas.unshelve_v277,
min_version='2.77',
max_version='2.90'
)
# In microversion 2.91 we support specifying 'host' to
# unshelve an instance to a specific hostself.
# 'availability_zone' = None is supported as well to unpin the
# availability zone of an instance bonded to this availability_zone
@validation.schema(shelve_schemas.unshelve_v291, min_version='2.91')
def _unshelve(self, req, id, body):
"""Restore an instance from shelved mode."""
context = req.environ["nova.context"]
instance = common.get_instance(self.compute_api, context, id)
context.can(
shelve_policies.POLICY_ROOT % 'unshelve',
target={'project_id': instance.project_id}
)
unshelve_args = {}
unshelve_dict = body.get('unshelve')
support_az = api_version_request.is_supported(
req, '2.77')
support_host = api_version_request.is_supported(
req, '2.91')
if unshelve_dict:
if support_az and 'availability_zone' in unshelve_dict:
unshelve_args['new_az'] = (
unshelve_dict['availability_zone']
)
if support_host:
unshelve_args['host'] = unshelve_dict.get('host')
try:
self.compute_api.unshelve(
context,
instance,
**unshelve_args,
)
except (
exception.InstanceIsLocked,
exception.UnshelveInstanceInvalidState,
exception.UnshelveHostNotInAZ,
exception.MismatchVolumeAZException,
) 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, 'unshelve', id)
except (
exception.InvalidRequest,
exception.ExtendedResourceRequestOldCompute,
exception.ComputeHostNotFound,
) as e:
raise exc.HTTPBadRequest(explanation=e.format_message())
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