5a89faf496
Support rollback in the process of creating an instance Co-Authored-By: Zhong Luyao <luyao.zhong@intel.com> Implements: blueprint add-rollback-mechanism-for-creating-a-instance Change-Id: I2f373d5acee1db88ee1eb00160966ebb0977ad50
152 lines
5.5 KiB
Python
152 lines
5.5 KiB
Python
# Copyright 2016 Huawei Technologies Co.,LTD.
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# All Rights Reserved.
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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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"""Handles all requests relating to compute resources"""
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from oslo_log import log
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from nimble.engine import rpcapi
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from nimble.engine import status
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from nimble import image
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from nimble import objects
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LOG = log.getLogger(__name__)
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class API(object):
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"""API for interacting with the engine manager."""
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def __init__(self, image_api=None, **kwargs):
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super(API, self).__init__(**kwargs)
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self.image_api = image_api or image.API()
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self.engine_rpcapi = rpcapi.EngineAPI()
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def _get_image(self, context, image_uuid):
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return self.image_api.get(context, image_uuid)
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def _validate_and_build_base_options(self, context, instance_type,
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image_uuid, name, description,
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availability_zone, extra):
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"""Verify all the input parameters"""
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base_options = {
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'image_uuid': image_uuid,
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'status': status.BUILDING,
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'user_id': context.user_id,
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'project_id': context.project_id,
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'instance_type_uuid': instance_type['uuid'],
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'name': name,
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'description': description,
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'extra': extra or {},
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'availability_zone': availability_zone}
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# return the validated options
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return base_options
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def _provision_instances(self, context, base_options):
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# TODO(zhenguo): Reserve quotas
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instance = objects.Instance(context=context)
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instance.update(base_options)
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instance.status = status.BUILDING
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instance.create()
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return instance
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def _create_instance(self, context, instance_type, image_uuid,
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name, description, availability_zone, extra,
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requested_networks):
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"""Verify all the input parameters"""
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# Verify the specified image exists
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if image_uuid:
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self._get_image(context, image_uuid)
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base_options = self._validate_and_build_base_options(
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context, instance_type, image_uuid, name, description,
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availability_zone, extra)
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instance = self._provision_instances(context, base_options)
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request_spec = {
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'instance_id': instance.uuid,
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'instance_properties': {
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'availability_zone': instance.availability_zone,
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'instance_type_uuid': instance.instance_type_uuid,
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},
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'instance_type': dict(instance_type),
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}
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self.engine_rpcapi.create_instance(context, instance,
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requested_networks,
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request_spec,
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filter_properties=None)
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return instance
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def create(self, context, instance_type, image_uuid,
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name=None, description=None, availability_zone=None,
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extra=None, requested_networks=None):
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"""Provision instances
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Sending instance information to the engine and will handle
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creating the DB entries.
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Returns an instance object
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"""
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# check availability zone
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# if availability_zone:
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# available_zones = availability_zones.\
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# get_availability_zones(context.elevated(), True)
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# if availability_zone not in available_zones:
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# msg = _('The requested availability zone is not available')
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# raise exception.InvalidRequest(msg)
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return self._create_instance(context, instance_type,
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image_uuid, name, description,
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availability_zone, extra,
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requested_networks)
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def _delete_instance(self, context, instance):
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self.engine_rpcapi.delete_instance(context, instance)
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def delete(self, context, instance):
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"""Delete an instance."""
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LOG.debug("Going to try to delete instance %s", instance.uuid)
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self._delete_instance(context, instance)
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def states(self, context, instance):
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"""Get instance states."""
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return self.engine_rpcapi.instance_states(context, instance)
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def power(self, context, instance, target):
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"""Set power state of an instance."""
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self.engine_rpcapi.set_power_state(context, instance, target)
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def get_ironic_node(self, context, instance_uuid, fields):
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"""Get a ironic node by instance UUID."""
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return self.engine_rpcapi.get_ironic_node(context,
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instance_uuid,
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fields)
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def get_ironic_node_list(self, context, fields):
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"""Get a list of ironic node."""
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return self.engine_rpcapi.get_ironic_node_list(context, fields)
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def list_availability_zones(self, context):
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"""Get a list of availability zones."""
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return self.engine_rpcapi.list_availability_zones(context)
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