121 lines
4.5 KiB
Python
121 lines
4.5 KiB
Python
# Copyright 2013 OpenStack Foundation
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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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from oslo_utils import strutils
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from webob import exc
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from nova.api.openstack import common
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from nova.api.openstack import extensions
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from nova.api.openstack import wsgi
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from nova import compute
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from nova import context as nova_context
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from nova import exception
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from nova.i18n import _
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from nova import utils
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authorize = extensions.extension_authorizer('compute', 'evacuate')
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class Controller(wsgi.Controller):
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def __init__(self, ext_mgr, *args, **kwargs):
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super(Controller, self).__init__(*args, **kwargs)
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self.compute_api = compute.API()
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self.host_api = compute.HostAPI()
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self.ext_mgr = ext_mgr
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@wsgi.action('evacuate')
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def _evacuate(self, req, id, body):
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"""Permit admins to evacuate a server from a failed host
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to a new one.
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If host is empty, the scheduler will select one.
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"""
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context = req.environ["nova.context"]
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authorize(context)
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# NOTE(alex_xu): back-compatible with db layer hard-code admin
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# permission checks. This has to be left only for API v2.0 because
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# this version has to be stable even if it means that only admins
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# can call this method while the policy could be changed.
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nova_context.require_admin_context(context)
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if not self.is_valid_body(body, "evacuate"):
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raise exc.HTTPBadRequest(_("Malformed request body"))
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evacuate_body = body["evacuate"]
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host = evacuate_body.get("host")
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if (not host and
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not self.ext_mgr.is_loaded('os-extended-evacuate-find-host')):
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msg = _("host must be specified.")
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raise exc.HTTPBadRequest(explanation=msg)
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try:
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on_shared_storage = strutils.bool_from_string(
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evacuate_body["onSharedStorage"])
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except (TypeError, KeyError):
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msg = _("onSharedStorage must be specified.")
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raise exc.HTTPBadRequest(explanation=msg)
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password = None
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if 'adminPass' in evacuate_body:
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# check that if requested to evacuate server on shared storage
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# password not specified
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if on_shared_storage:
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msg = _("admin password can't be changed on existing disk")
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raise exc.HTTPBadRequest(explanation=msg)
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password = evacuate_body['adminPass']
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elif not on_shared_storage:
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password = utils.generate_password()
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if host is not None:
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try:
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self.host_api.service_get_by_compute_host(context, host)
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except exception.NotFound:
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msg = _("Compute host %s not found.") % host
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raise exc.HTTPNotFound(explanation=msg)
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instance = common.get_instance(self.compute_api, context, id)
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try:
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if instance.host == host:
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msg = _("The target host can't be the same one.")
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raise exc.HTTPBadRequest(explanation=msg)
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self.compute_api.evacuate(context, instance, host,
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on_shared_storage, password)
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except exception.InstanceInvalidState as state_error:
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common.raise_http_conflict_for_instance_invalid_state(state_error,
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'evacuate', id)
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except exception.InstanceNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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except exception.ComputeServiceInUse as e:
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raise exc.HTTPBadRequest(explanation=e.format_message())
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if password:
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return {'adminPass': password}
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class Evacuate(extensions.ExtensionDescriptor):
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"""Enables server evacuation."""
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name = "Evacuate"
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alias = "os-evacuate"
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namespace = "http://docs.openstack.org/compute/ext/evacuate/api/v2"
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updated = "2013-01-06T00:00:00Z"
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def get_controller_extensions(self):
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controller = Controller(self.ext_mgr)
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extension = extensions.ControllerExtension(self, 'servers', controller)
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return [extension]
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