563 lines
18 KiB
Python
563 lines
18 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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# Copyright (c) 2010 Citrix Systems, Inc.
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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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"""
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A fake (in-memory) hypervisor+api.
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Allows nova testing w/o a hypervisor. This module also documents the
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semantics of real hypervisor connections.
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"""
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import collections
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import contextlib
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from nova.compute import arch
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from nova.compute import hv_type
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from nova.compute import power_state
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from nova.compute import task_states
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from nova.compute import vm_mode
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from nova.console import type as ctype
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from nova import db
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from nova import exception
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from nova.i18n import _LW
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from nova import utils
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from nova.virt import diagnostics
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from nova.virt import driver
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from nova.virt import hardware
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from nova.virt import virtapi
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CONF = cfg.CONF
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CONF.import_opt('host', 'nova.netconf')
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LOG = logging.getLogger(__name__)
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_FAKE_NODES = None
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def set_nodes(nodes):
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"""Sets FakeDriver's node.list.
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It has effect on the following methods:
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get_available_nodes()
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get_available_resource
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To restore the change, call restore_nodes()
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"""
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global _FAKE_NODES
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_FAKE_NODES = nodes
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def restore_nodes():
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"""Resets FakeDriver's node list modified by set_nodes().
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Usually called from tearDown().
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"""
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global _FAKE_NODES
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_FAKE_NODES = [CONF.host]
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class FakeInstance(object):
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def __init__(self, name, state, uuid):
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self.name = name
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self.state = state
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self.uuid = uuid
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def __getitem__(self, key):
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return getattr(self, key)
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class Resources(object):
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vcpus = 0
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memory_mb = 0
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local_gb = 0
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vcpus_used = 0
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memory_mb_used = 0
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local_gb_used = 0
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def __init__(self, vcpus=8, memory_mb=8000, local_gb=500):
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self.vcpus = vcpus
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self.memory_mb = memory_mb
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self.local_gb = local_gb
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def claim(self, vcpus=0, mem=0, disk=0):
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self.vcpus_used += vcpus
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self.memory_mb_used += mem
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self.local_gb_used += disk
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def release(self, vcpus=0, mem=0, disk=0):
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self.vcpus_used -= vcpus
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self.memory_mb_used -= mem
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self.local_gb_used -= disk
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def dump(self):
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return {
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'vcpus': self.vcpus,
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'memory_mb': self.memory_mb,
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'local_gb': self.local_gb,
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'vcpus_used': self.vcpus_used,
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'memory_mb_used': self.memory_mb_used,
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'local_gb_used': self.local_gb_used
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}
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class FakeDriver(driver.ComputeDriver):
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capabilities = {
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"has_imagecache": True,
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"supports_recreate": True,
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"supports_migrate_to_same_host": True
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}
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# Since we don't have a real hypervisor, pretend we have lots of
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# disk and ram so this driver can be used to test large instances.
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vcpus = 1000
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memory_mb = 800000
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local_gb = 600000
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"""Fake hypervisor driver."""
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def __init__(self, virtapi, read_only=False):
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super(FakeDriver, self).__init__(virtapi)
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self.instances = {}
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self.resources = Resources(
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vcpus=self.vcpus,
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memory_mb=self.memory_mb,
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local_gb=self.local_gb)
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self.host_status_base = {
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'hypervisor_type': 'fake',
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'hypervisor_version': utils.convert_version_to_int('1.0'),
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'hypervisor_hostname': CONF.host,
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'cpu_info': {},
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'disk_available_least': 0,
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'supported_instances': jsonutils.dumps([(arch.X86_64,
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hv_type.FAKE,
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vm_mode.HVM)]),
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'numa_topology': None,
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}
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self._mounts = {}
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self._interfaces = {}
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if not _FAKE_NODES:
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set_nodes([CONF.host])
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def init_host(self, host):
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return
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def list_instances(self):
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return [self.instances[uuid].name for uuid in self.instances.keys()]
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def list_instance_uuids(self):
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return self.instances.keys()
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def plug_vifs(self, instance, network_info):
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"""Plug VIFs into networks."""
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pass
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def unplug_vifs(self, instance, network_info):
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"""Unplug VIFs from networks."""
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pass
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def spawn(self, context, instance, image_meta, injected_files,
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admin_password, network_info=None, block_device_info=None):
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uuid = instance.uuid
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state = power_state.RUNNING
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flavor = instance.flavor
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self.resources.claim(
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vcpus=flavor.vcpus,
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mem=flavor.memory_mb,
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disk=flavor.root_gb)
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fake_instance = FakeInstance(instance.name, state, uuid)
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self.instances[uuid] = fake_instance
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def snapshot(self, context, instance, image_id, update_task_state):
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if instance.uuid not in self.instances:
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raise exception.InstanceNotRunning(instance_id=instance.uuid)
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update_task_state(task_state=task_states.IMAGE_UPLOADING)
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def reboot(self, context, instance, network_info, reboot_type,
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block_device_info=None, bad_volumes_callback=None):
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pass
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def get_host_ip_addr(self):
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return '192.168.0.1'
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def set_admin_password(self, instance, new_pass):
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pass
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def inject_file(self, instance, b64_path, b64_contents):
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pass
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def resume_state_on_host_boot(self, context, instance, network_info,
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block_device_info=None):
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pass
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def rescue(self, context, instance, network_info, image_meta,
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rescue_password):
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pass
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def unrescue(self, instance, network_info):
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pass
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def poll_rebooting_instances(self, timeout, instances):
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pass
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def migrate_disk_and_power_off(self, context, instance, dest,
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flavor, network_info,
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block_device_info=None,
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timeout=0, retry_interval=0):
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pass
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def finish_revert_migration(self, context, instance, network_info,
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block_device_info=None, power_on=True):
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pass
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def post_live_migration_at_destination(self, context, instance,
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network_info,
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block_migration=False,
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block_device_info=None):
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pass
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def power_off(self, instance, timeout=0, retry_interval=0):
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pass
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def power_on(self, context, instance, network_info,
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block_device_info=None):
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pass
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def soft_delete(self, instance):
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pass
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def restore(self, instance):
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pass
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def pause(self, instance):
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pass
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def unpause(self, instance):
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pass
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def suspend(self, context, instance):
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pass
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def resume(self, context, instance, network_info, block_device_info=None):
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pass
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def destroy(self, context, instance, network_info, block_device_info=None,
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destroy_disks=True, migrate_data=None):
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key = instance.uuid
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if key in self.instances:
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flavor = instance.flavor
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self.resources.release(
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vcpus=flavor.vcpus,
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mem=flavor.memory_mb,
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disk=flavor.root_gb)
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del self.instances[key]
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else:
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LOG.warning(_LW("Key '%(key)s' not in instances '%(inst)s'"),
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{'key': key,
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'inst': self.instances}, instance=instance)
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def cleanup(self, context, instance, network_info, block_device_info=None,
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destroy_disks=True, migrate_data=None, destroy_vifs=True):
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pass
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def attach_volume(self, context, connection_info, instance, mountpoint,
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disk_bus=None, device_type=None, encryption=None):
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"""Attach the disk to the instance at mountpoint using info."""
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instance_name = instance.name
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if instance_name not in self._mounts:
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self._mounts[instance_name] = {}
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self._mounts[instance_name][mountpoint] = connection_info
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def detach_volume(self, connection_info, instance, mountpoint,
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encryption=None):
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"""Detach the disk attached to the instance."""
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try:
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del self._mounts[instance.name][mountpoint]
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except KeyError:
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pass
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def swap_volume(self, old_connection_info, new_connection_info,
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instance, mountpoint, resize_to):
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"""Replace the disk attached to the instance."""
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instance_name = instance.name
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if instance_name not in self._mounts:
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self._mounts[instance_name] = {}
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self._mounts[instance_name][mountpoint] = new_connection_info
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def attach_interface(self, instance, image_meta, vif):
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if vif['id'] in self._interfaces:
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raise exception.InterfaceAttachFailed(
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instance_uuid=instance.uuid)
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self._interfaces[vif['id']] = vif
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def detach_interface(self, instance, vif):
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try:
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del self._interfaces[vif['id']]
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except KeyError:
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raise exception.InterfaceDetachFailed(
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instance_uuid=instance.uuid)
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def get_info(self, instance):
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if instance.uuid not in self.instances:
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raise exception.InstanceNotFound(instance_id=instance.uuid)
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i = self.instances[instance.uuid]
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return hardware.InstanceInfo(state=i.state,
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max_mem_kb=0,
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mem_kb=0,
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num_cpu=2,
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cpu_time_ns=0)
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def get_diagnostics(self, instance):
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return {'cpu0_time': 17300000000,
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'memory': 524288,
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'vda_errors': -1,
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'vda_read': 262144,
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'vda_read_req': 112,
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'vda_write': 5778432,
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'vda_write_req': 488,
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'vnet1_rx': 2070139,
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'vnet1_rx_drop': 0,
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'vnet1_rx_errors': 0,
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'vnet1_rx_packets': 26701,
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'vnet1_tx': 140208,
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'vnet1_tx_drop': 0,
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'vnet1_tx_errors': 0,
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'vnet1_tx_packets': 662,
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}
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def get_instance_diagnostics(self, instance):
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diags = diagnostics.Diagnostics(state='running', driver='fake',
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hypervisor_os='fake-os', uptime=46664, config_drive=True)
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diags.add_cpu(time=17300000000)
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diags.add_nic(mac_address='01:23:45:67:89:ab',
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rx_packets=26701,
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rx_octets=2070139,
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tx_octets=140208,
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tx_packets = 662)
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diags.add_disk(id='fake-disk-id',
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read_bytes=262144,
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read_requests=112,
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write_bytes=5778432,
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write_requests=488)
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diags.memory_details.maximum = 524288
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return diags
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def get_all_bw_counters(self, instances):
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"""Return bandwidth usage counters for each interface on each
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running VM.
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"""
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bw = []
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return bw
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def get_all_volume_usage(self, context, compute_host_bdms):
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"""Return usage info for volumes attached to vms on
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a given host.
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"""
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volusage = []
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return volusage
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def get_host_cpu_stats(self):
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stats = {'kernel': 5664160000000,
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'idle': 1592705190000000,
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'user': 26728850000000,
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'iowait': 6121490000000}
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stats['frequency'] = 800
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return stats
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def block_stats(self, instance, disk_id):
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return [0, 0, 0, 0, None]
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def get_console_output(self, context, instance):
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return 'FAKE CONSOLE OUTPUT\nANOTHER\nLAST LINE'
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def get_vnc_console(self, context, instance):
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return ctype.ConsoleVNC(internal_access_path='FAKE',
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host='fakevncconsole.com',
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port=6969)
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def get_spice_console(self, context, instance):
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return ctype.ConsoleSpice(internal_access_path='FAKE',
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host='fakespiceconsole.com',
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port=6969,
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tlsPort=6970)
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def get_rdp_console(self, context, instance):
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return ctype.ConsoleRDP(internal_access_path='FAKE',
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host='fakerdpconsole.com',
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port=6969)
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def get_serial_console(self, context, instance):
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return ctype.ConsoleSerial(internal_access_path='FAKE',
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host='fakerdpconsole.com',
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port=6969)
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def get_console_pool_info(self, console_type):
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return {'address': '127.0.0.1',
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'username': 'fakeuser',
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'password': 'fakepassword'}
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def refresh_security_group_rules(self, security_group_id):
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return True
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def refresh_security_group_members(self, security_group_id):
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return True
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def refresh_instance_security_rules(self, instance):
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return True
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def refresh_provider_fw_rules(self):
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pass
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def get_available_resource(self, nodename):
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"""Updates compute manager resource info on ComputeNode table.
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Since we don't have a real hypervisor, pretend we have lots of
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disk and ram.
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"""
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cpu_info = collections.OrderedDict([
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('arch', 'x86_64'),
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('model', 'Nehalem'),
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('vendor', 'Intel'),
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('features', ['pge', 'clflush']),
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('topology', {
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'cores': 1,
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'threads': 1,
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'sockets': 4,
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}),
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])
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if nodename not in _FAKE_NODES:
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return {}
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host_status = self.host_status_base.copy()
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host_status.update(self.resources.dump())
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host_status['hypervisor_hostname'] = nodename
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host_status['host_hostname'] = nodename
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host_status['host_name_label'] = nodename
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host_status['cpu_info'] = jsonutils.dumps(cpu_info)
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return host_status
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def ensure_filtering_rules_for_instance(self, instance, network_info):
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return
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def get_instance_disk_info(self, instance, block_device_info=None):
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return
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def live_migration(self, context, instance, dest,
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post_method, recover_method, block_migration=False,
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migrate_data=None):
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post_method(context, instance, dest, block_migration,
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migrate_data)
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return
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def check_can_live_migrate_destination_cleanup(self, context,
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dest_check_data):
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return
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def check_can_live_migrate_destination(self, context, instance,
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src_compute_info, dst_compute_info,
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block_migration=False,
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disk_over_commit=False):
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return {}
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def check_can_live_migrate_source(self, context, instance,
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dest_check_data, block_device_info=None):
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return
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def finish_migration(self, context, migration, instance, disk_info,
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network_info, image_meta, resize_instance,
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block_device_info=None, power_on=True):
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return
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def confirm_migration(self, migration, instance, network_info):
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return
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def pre_live_migration(self, context, instance, block_device_info,
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network_info, disk_info, migrate_data=None):
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return
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def unfilter_instance(self, instance, network_info):
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return
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def _test_remove_vm(self, instance_uuid):
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"""Removes the named VM, as if it crashed. For testing."""
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self.instances.pop(instance_uuid)
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def host_power_action(self, action):
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"""Reboots, shuts down or powers up the host."""
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return action
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def host_maintenance_mode(self, host, mode):
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"""Start/Stop host maintenance window. On start, it triggers
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guest VMs evacuation.
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"""
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if not mode:
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return 'off_maintenance'
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return 'on_maintenance'
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def set_host_enabled(self, enabled):
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"""Sets the specified host's ability to accept new instances."""
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if enabled:
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return 'enabled'
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return 'disabled'
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def get_volume_connector(self, instance):
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return {'ip': CONF.my_block_storage_ip,
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'initiator': 'fake',
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'host': 'fakehost'}
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def get_available_nodes(self, refresh=False):
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return _FAKE_NODES
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def instance_on_disk(self, instance):
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return False
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def quiesce(self, context, instance, image_meta):
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pass
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def unquiesce(self, context, instance, image_meta):
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pass
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class FakeVirtAPI(virtapi.VirtAPI):
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def provider_fw_rule_get_all(self, context):
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return db.provider_fw_rule_get_all(context)
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|
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@contextlib.contextmanager
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def wait_for_instance_event(self, instance, event_names, deadline=300,
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|
error_callback=None):
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|
# NOTE(danms): Don't actually wait for any events, just
|
|
# fall through
|
|
yield
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|
|
|
|
|
class SmallFakeDriver(FakeDriver):
|
|
# The api samples expect specific cpu memory and disk sizes. In order to
|
|
# allow the FakeVirt driver to be used outside of the unit tests, provide
|
|
# a separate class that has the values expected by the api samples. So
|
|
# instead of requiring new samples every time those
|
|
# values are adjusted allow them to be overwritten here.
|
|
|
|
vcpus = 1
|
|
memory_mb = 8192
|
|
local_gb = 1028
|