cb693e4093
This patch removes import of classes and replaces them with import of modules. Change-Id: Id2502cf96ac7227cf1036cd54a74f3d7acd83479 Closes-Bug: #1594434
132 lines
3.8 KiB
Python
132 lines
3.8 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_log import log
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import threading
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LOG = log.getLogger(__name__)
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class Mapping(object):
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def __init__(self, model):
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self.model = model
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self._mapping_hypervisors = {}
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self.mapping_vm = {}
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self.lock = threading.Lock()
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def map(self, hypervisor, vm):
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"""Select the hypervisor where the instance are launched
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:param hypervisor: the hypervisor
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:param vm: the virtual machine or instance
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"""
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try:
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self.lock.acquire()
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# init first
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if hypervisor.uuid not in self._mapping_hypervisors.keys():
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self._mapping_hypervisors[hypervisor.uuid] = []
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# map node => vms
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self._mapping_hypervisors[hypervisor.uuid].append(
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vm.uuid)
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# map vm => node
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self.mapping_vm[vm.uuid] = hypervisor.uuid
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finally:
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self.lock.release()
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def unmap(self, hypervisor, vm):
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"""Remove the instance from the hypervisor
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:param hypervisor: the hypervisor
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:param vm: the virtual machine or instance
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"""
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self.unmap_from_id(hypervisor.uuid, vm.uuid)
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def unmap_from_id(self, node_uuid, vm_uuid):
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"""Remove the instance (by id) from the hypervisor (by id)
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:rtype : object
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"""
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try:
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self.lock.acquire()
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if str(node_uuid) in self._mapping_hypervisors:
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self._mapping_hypervisors[str(node_uuid)].remove(str(vm_uuid))
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# remove vm
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self.mapping_vm.pop(vm_uuid)
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else:
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LOG.warning(
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"trying to delete the virtual machine {0} but it was not "
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"found on hypervisor {1}".format(
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vm_uuid, node_uuid))
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finally:
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self.lock.release()
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def get_mapping(self):
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return self._mapping_hypervisors
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def get_mapping_vm(self):
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return self.mapping_vm
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def get_node_from_vm(self, vm):
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return self.get_node_from_vm_id(vm.uuid)
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def get_node_from_vm_id(self, vm_uuid):
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"""Getting host information from the guest VM
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:param vm: the uuid of the instance
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:return: hypervisor
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"""
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return self.model.get_hypervisor_from_id(
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self.get_mapping_vm()[str(vm_uuid)])
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def get_node_vms(self, hypervisor):
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"""Get the list of instances running on the hypervisor
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:param hypervisor:
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:return:
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"""
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return self.get_node_vms_from_id(hypervisor.uuid)
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def get_node_vms_from_id(self, node_uuid):
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if str(node_uuid) in self._mapping_hypervisors.keys():
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return self._mapping_hypervisors[str(node_uuid)]
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else:
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# empty
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return []
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def migrate_vm(self, vm, src_hypervisor, dest_hypervisor):
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"""Migrate single instance from src_hypervisor to dest_hypervisor
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:param vm:
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:param src_hypervisor:
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:param dest_hypervisor:
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:return:
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"""
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if src_hypervisor == dest_hypervisor:
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return False
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# unmap
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self.unmap(src_hypervisor, vm)
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# map
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self.map(dest_hypervisor, vm)
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return True
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