openstack/nova
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nova/nova/virt/fake.py
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Goutham Pacha Ravi 6b9fd51dc3 Reconcile stale Manila share access rules 
Cold migration and resize revoke the source host's Manila access rule
inline during confirm/revert and swallow failures. If manila-api is
unreachable the rule is left granted and never retried, so a CephFS
cephx identity or an NFS ip rule can outlive the instance that needed it.

Add a reconcile pass, run at host startup and on a periodic task. For
this host's instances and the migrations that touched it, it recomputes
the access rules each share still needs and revokes the rest. Any host
can drain an orphaned CephFS 'nova-<hex>' identity; a host drains its own
NFS ip rule only when no local instance needs it and it is not mounted.
Shares whose instance is missing or in transit are left for a later pass.

The periodic interval is [DEFAULT] stale_share_access_reconcile_interval
(default 1800s; 0 or less runs only the start-up pass).

Partially-implements: blueprint virtiofs-cold-migration
Related-Bug: #2161761
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
Assisted-by: Claude Opus 4.8
Change-Id: I63a392a304e3a0a8e028528e3cbd4f2f1cbcf797
2026-09-04 12:55:09 -07:00

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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
# Copyright (c) 2010 Citrix Systems, Inc.
#
# 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.
"""
A fake (in-memory) hypervisor+api.
Allows nova testing w/o a hypervisor. This module also documents the
semantics of real hypervisor connections.
"""
import collections
import contextlib
import time
import uuid
import fixtures
import os_resource_classes as orc
import os_traits
from oslo_log import log as logging
from oslo_serialization import jsonutils
from oslo_utils.fixture import uuidsentinel as uuids
from oslo_utils import versionutils
from nova.compute import power_state
from nova.compute import task_states
from nova.compute import vm_states
import nova.conf
from nova.console import type as ctype
from nova import context as nova_context
from nova import exception
from nova import objects
from nova.objects import diagnostics as diagnostics_obj
from nova.objects import fields as obj_fields
from nova.objects import migrate_data
from nova.virt import driver
from nova.virt import hardware
from nova.virt.ironic import driver as ironic
import nova.virt.node
from nova.virt import virtapi
CONF = nova.conf.CONF
LOG = logging.getLogger(__name__)
class FakeInstance(object):
def __init__(self, name, state, uuid):
self.name = name
self.state = state
self.uuid = uuid
def __getitem__(self, key):
return getattr(self, key)
class Resources(object):
vcpus = 0
memory_mb = 0
local_gb = 0
vcpus_used = 0
memory_mb_used = 0
local_gb_used = 0
def __init__(self, vcpus=8, memory_mb=8000, local_gb=500):
self.vcpus = vcpus
self.memory_mb = memory_mb
self.local_gb = local_gb
def claim(self, vcpus=0, mem=0, disk=0):
self.vcpus_used += vcpus
self.memory_mb_used += mem
self.local_gb_used += disk
def release(self, vcpus=0, mem=0, disk=0):
self.vcpus_used -= vcpus
self.memory_mb_used -= mem
self.local_gb_used -= disk
def dump(self):
return {
'vcpus': self.vcpus,
'memory_mb': self.memory_mb,
'local_gb': self.local_gb,
'vcpus_used': self.vcpus_used,
'memory_mb_used': self.memory_mb_used,
'local_gb_used': self.local_gb_used
}
class FakeDriver(driver.ComputeDriver):
# These must match the traits in
# nova.tests.functional.integrated_helpers.ProviderUsageBaseTestCase
capabilities = {
"has_imagecache": True,
"supports_evacuate": True,
"supports_migrate_to_same_host": False,
"supports_attach_interface": True,
"supports_device_tagging": True,
"supports_tagged_attach_interface": True,
"supports_tagged_attach_volume": True,
"supports_extend_volume": True,
"supports_multiattach": True,
"supports_trusted_certs": True,
"supports_pcpus": False,
"supports_accelerators": True,
"supports_remote_managed_ports": True,
"supports_address_space_passthrough": True,
"supports_address_space_emulated": True,
"supports_stateless_firmware": True,
"supports_virtio_fs": True,
"supports_mem_backing_file": True,
# Supported image types
"supports_image_type_raw": True,
"supports_image_type_vhd": False,
}
# Since we don't have a real hypervisor, pretend we have lots of
# disk and ram so this driver can be used to test large instances.
vcpus = 1000
memory_mb = 800000
local_gb = 600000
"""Fake hypervisor driver."""
def __init__(self, virtapi, read_only=False):
super(FakeDriver, self).__init__(virtapi)
self.instances = {}
self.resources = Resources(
vcpus=self.vcpus,
memory_mb=self.memory_mb,
local_gb=self.local_gb)
self.host_status_base = {
'hypervisor_type': 'fake',
'hypervisor_version': versionutils.convert_version_to_int('1.0'),
'hypervisor_hostname': CONF.host,
'cpu_info': {},
'disk_available_least': 0,
'supported_instances': [(
obj_fields.Architecture.X86_64,
obj_fields.HVType.FAKE,
obj_fields.VMMode.HVM)],
'numa_topology': None,
}
self._mounts = {}
self._interfaces = {}
self.active_migrations = {}
self._host = None
self._nodes = None
def init_host(self, host):
self._host = host
# NOTE(gibi): this is unnecessary complex and fragile but this is
# how many current functional sample tests expect the node name.
self._set_nodes(['fake-mini'] if self._host == 'compute'
else [self._host])
def _set_nodes(self, nodes):
# NOTE(gibi): this is not part of the driver interface but used
# by our tests to customize the discovered nodes by the fake
# driver.
self._nodes = nodes
def list_instances(self):
return [self.instances[uuid].name for uuid in self.instances.keys()]
def list_instance_uuids(self):
return list(self.instances.keys())
def plug_vifs(self, instance, network_info):
"""Plug VIFs into networks."""
pass
def unplug_vifs(self, instance, network_info):
"""Unplug VIFs from networks."""
pass
def spawn(self, context, instance, image_meta, injected_files,
admin_password, allocations, network_info=None,
block_device_info=None, power_on=True, accel_info=None):
if network_info:
for vif in network_info:
# simulate a real driver triggering the async network
# allocation as it might cause an error
vif.fixed_ips()
# store the vif as attached so we can allow detaching it later
# with a detach_interface() call.
self._interfaces[vif['id']] = vif
uuid = instance.uuid
state = power_state.RUNNING if power_on else power_state.SHUTDOWN
flavor = instance.flavor
self.resources.claim(
vcpus=flavor.vcpus,
mem=flavor.memory_mb,
disk=flavor.root_gb)
fake_instance = FakeInstance(instance.name, state, uuid)
self.instances[uuid] = fake_instance
def snapshot(self, context, instance, image_id, update_task_state):
if instance.uuid not in self.instances:
raise exception.InstanceNotRunning(instance_id=instance.uuid)
update_task_state(task_state=task_states.IMAGE_UPLOADING)
def reboot(self, context, instance, network_info, reboot_type,
block_device_info=None, bad_volumes_callback=None,
accel_info=None, share_info=None):
# If the guest is not on the hypervisor and we're doing a hard reboot
# then mimic the libvirt driver by spawning the guest.
if (instance.uuid not in self.instances and
reboot_type.lower() == 'hard'):
injected_files = admin_password = allocations = None
self.spawn(context, instance, instance.image_meta, injected_files,
admin_password, allocations,
block_device_info=block_device_info)
else:
# Just try to power on the guest.
self.power_on(context, instance, network_info,
block_device_info=block_device_info)
def get_host_ip_addr(self):
return '192.168.0.1'
def set_admin_password(self, instance, new_pass):
pass
def resume_state_on_host_boot(self, context, instance, network_info,
share_info, block_device_info=None):
pass
def rescue(self, context, instance, network_info, image_meta,
rescue_password, block_device_info, share_info):
pass
def unrescue(
self,
context: nova_context.RequestContext,
instance: 'objects.Instance',
):
self.instances[instance.uuid].state = power_state.RUNNING
def poll_rebooting_instances(self, timeout, instances):
pass
def migrate_disk_and_power_off(self, context, instance, dest,
flavor, network_info,
block_device_info=None,
timeout=0, retry_interval=0):
pass
def finish_revert_migration(self, context, instance, network_info,
migration, block_device_info=None,
power_on=True, share_info=None):
state = power_state.RUNNING if power_on else power_state.SHUTDOWN
self.instances[instance.uuid] = FakeInstance(
instance.name, state, instance.uuid)
def post_live_migration_at_destination(self, context, instance,
network_info,
block_migration=False,
block_device_info=None):
# Called from the destination host after a successful live migration
# so spawn the instance on this host to track it properly.
image_meta = injected_files = admin_password = allocations = None
self.spawn(context, instance, image_meta, injected_files,
admin_password, allocations)
def power_off(self, instance, timeout=0, retry_interval=0):
if instance.uuid in self.instances:
self.instances[instance.uuid].state = power_state.SHUTDOWN
else:
raise exception.InstanceNotFound(instance_id=instance.uuid)
def power_on(self, context, instance, network_info,
block_device_info=None, accel_info=None, share_info=None):
if instance.uuid in self.instances:
self.instances[instance.uuid].state = power_state.RUNNING
if share_info:
for share in share_info:
share.activate()
else:
raise exception.InstanceNotFound(instance_id=instance.uuid)
def mount_share(self, context, instance, share_mapping):
pass
def umount_share(self, context, instance, share_mapping):
pass
def is_share_mounted(self, share_mapping):
return False
def trigger_crash_dump(self, instance):
pass
def soft_delete(self, instance):
pass
def restore(self, instance):
pass
def pause(self, instance):
pass
def unpause(self, instance):
pass
def suspend(self, context, instance):
pass
def resume(
self,
context,
instance,
network_info,
block_device_info=None,
share_info=None
):
pass
def destroy(self, context, instance, network_info, block_device_info=None,
destroy_disks=True, destroy_secrets=True):
key = instance.uuid
if key in self.instances:
flavor = instance.flavor
self.resources.release(
vcpus=flavor.vcpus,
mem=flavor.memory_mb,
disk=flavor.root_gb)
del self.instances[key]
else:
LOG.warning("Key '%(key)s' not in instances '%(inst)s'",
{'key': key,
'inst': self.instances}, instance=instance)
def cleanup(self, context, instance, network_info, block_device_info=None,
destroy_disks=True, migrate_data=None, destroy_vifs=True,
destroy_secrets=True):
# cleanup() should not be called when the guest has not been destroyed.
if instance.uuid in self.instances:
raise exception.InstanceExists(
"Instance %s has not been destroyed." % instance.uuid)
def attach_volume(self, context, connection_info, instance, mountpoint,
disk_bus=None, device_type=None, encryption=None):
"""Attach the disk to the instance at mountpoint using info."""
instance_name = instance.name
if instance_name not in self._mounts:
self._mounts[instance_name] = {}
self._mounts[instance_name][mountpoint] = connection_info
def detach_volume(self, context, connection_info, instance, mountpoint,
encryption=None):
"""Detach the disk attached to the instance."""
try:
del self._mounts[instance.name][mountpoint]
except KeyError:
pass
def swap_volume(self, context, old_connection_info, new_connection_info,
instance, mountpoint, resize_to):
"""Replace the disk attached to the instance."""
instance_name = instance.name
if instance_name not in self._mounts:
self._mounts[instance_name] = {}
self._mounts[instance_name][mountpoint] = new_connection_info
def extend_volume(self, context, connection_info, instance,
requested_size):
"""Extend the disk attached to the instance."""
pass
def attach_interface(self, context, instance, image_meta, vif):
if vif['id'] in self._interfaces:
raise exception.InterfaceAttachFailed(
instance_uuid=instance.uuid)
self._interfaces[vif['id']] = vif
def detach_interface(self, context, instance, vif):
try:
del self._interfaces[vif['id']]
except KeyError:
raise exception.InterfaceDetachFailed(
instance_uuid=instance.uuid)
def get_info(self, instance, use_cache=True):
if instance.uuid not in self.instances:
raise exception.InstanceNotFound(instance_id=instance.uuid)
i = self.instances[instance.uuid]
return hardware.InstanceInfo(state=i.state)
def get_diagnostics(self, instance):
return {'cpu0_time': 17300000000,
'memory': 524288,
'vda_errors': -1,
'vda_read': 262144,
'vda_read_req': 112,
'vda_write': 5778432,
'vda_write_req': 488,
'vnet1_rx': 2070139,
'vnet1_rx_drop': 0,
'vnet1_rx_errors': 0,
'vnet1_rx_packets': 26701,
'vnet1_tx': 140208,
'vnet1_tx_drop': 0,
'vnet1_tx_errors': 0,
'vnet1_tx_packets': 662,
}
def get_instance_diagnostics(self, instance):
diags = diagnostics_obj.Diagnostics(
state='running', driver='libvirt', hypervisor='kvm',
hypervisor_os='ubuntu', uptime=46664, config_drive=True)
diags.add_cpu(id=0, time=17300000000, utilisation=15)
diags.add_nic(mac_address='01:23:45:67:89:ab',
rx_octets=2070139,
rx_errors=100,
rx_drop=200,
rx_packets=26701,
rx_rate=300,
tx_octets=140208,
tx_errors=400,
tx_drop=500,
tx_packets = 662,
tx_rate=600)
diags.add_disk(read_bytes=262144,
read_requests=112,
write_bytes=5778432,
write_requests=488,
errors_count=1)
diags.memory_details = diagnostics_obj.MemoryDiagnostics(
maximum=524288, used=0)
return diags
def get_all_volume_usage(self, context, compute_host_bdms):
"""Return usage info for volumes attached to vms on
a given host.
"""
volusage = []
if compute_host_bdms:
volusage = [{'volume': compute_host_bdms[0][
'instance_bdms'][0]['volume_id'],
'instance': compute_host_bdms[0]['instance'],
'rd_bytes': 0,
'rd_req': 0,
'wr_bytes': 0,
'wr_req': 0}]
return volusage
def get_host_cpu_stats(self):
stats = {'kernel': 5664160000000,
'idle': 1592705190000000,
'user': 26728850000000,
'iowait': 6121490000000}
stats['frequency'] = 800
return stats
def block_stats(self, instance, disk_id):
return [0, 0, 0, 0, None]
def get_console_output(self, context, instance):
return 'FAKE CONSOLE OUTPUT\nANOTHER\nLAST LINE'
def get_vnc_console(self, context, instance):
return ctype.ConsoleVNC(
internal_access_path=uuids.vnc_access_path,
host='fakevncconsole.com',
port=6969)
def get_spice_console(self, context, instance):
return ctype.ConsoleSpice(
internal_access_path=uuids.spice_access_path,
host='fakespiceconsole.com',
port=6969,
tlsPort=6970)
def get_serial_console(self, context, instance):
return ctype.ConsoleSerial(
internal_access_path=uuids.serial_access_path,
host='fakerdpconsole.com',
port=6969)
def get_mks_console(self, context, instance):
return ctype.ConsoleMKS(
internal_access_path=uuids.mks_access_path,
host='fakemksconsole.com',
port=6969)
def get_available_resource(self, nodename):
"""Updates compute manager resource info on ComputeNode table.
Since we don't have a real hypervisor, pretend we have lots of
disk and ram.
"""
cpu_info = collections.OrderedDict([
('arch', 'x86_64'),
('model', 'Nehalem'),
('vendor', 'Intel'),
('features', ['pge', 'clflush']),
('topology', {
'cores': 1,
'threads': 1,
'sockets': 4,
}),
])
if nodename not in self.get_available_nodes():
return {}
host_status = self.host_status_base.copy()
host_status.update(self.resources.dump())
host_status['hypervisor_hostname'] = nodename
host_status['host_hostname'] = nodename
host_status['host_name_label'] = nodename
host_status['cpu_info'] = jsonutils.dumps(cpu_info)
# NOTE(danms): Because the fake driver runs on the same host
# in tests, potentially with multiple nodes, we need to
# control our node uuids. Make sure we return a unique and
# consistent uuid for each node we are responsible for to
# avoid the persistent local node identity from taking over.
host_status['uuid'] = str(getattr(uuids, 'node_%s' % nodename))
return host_status
def update_provider_tree(self, provider_tree, nodename, allocations=None):
# NOTE(yikun): If the inv record does not exists, the allocation_ratio
# will use the CONF.xxx_allocation_ratio value if xxx_allocation_ratio
# is set, and fallback to use the initial_xxx_allocation_ratio
# otherwise.
inv = provider_tree.data(nodename).inventory
ratios = self._get_allocation_ratios(inv)
inventory = {
'VCPU': {
'total': self.vcpus,
'min_unit': 1,
'max_unit': self.vcpus,
'step_size': 1,
'allocation_ratio': ratios[orc.VCPU],
'reserved': CONF.reserved_host_cpus,
},
'MEMORY_MB': {
'total': self.memory_mb,
'min_unit': 1,
'max_unit': self.memory_mb,
'step_size': 1,
'allocation_ratio': ratios[orc.MEMORY_MB],
'reserved': CONF.reserved_host_memory_mb,
},
'DISK_GB': {
'total': self.local_gb,
'min_unit': 1,
'max_unit': self.local_gb,
'step_size': 1,
'allocation_ratio': ratios[orc.DISK_GB],
'reserved': self._get_reserved_host_disk_gb_from_config(),
},
}
provider_tree.update_inventory(nodename, inventory)
def get_instance_disk_info(self, instance, block_device_info=None):
return
def live_migration(self, context, instance, dest,
post_method, recover_method, block_migration=False,
migrate_data=None):
post_method(context, instance, dest, block_migration,
migrate_data)
return
def live_migration_force_complete(self, instance):
return
def live_migration_abort(self, instance):
return
def cleanup_live_migration_destination_check(self, context,
dest_check_data):
return
def check_can_live_migrate_destination(self, context, instance,
src_compute_info, dst_compute_info,
block_migration=False,
disk_over_commit=False):
data = migrate_data.LibvirtLiveMigrateData()
data.filename = 'fake'
data.image_type = CONF.libvirt.images_type
data.graphics_listen_addr_vnc = CONF.vnc.server_listen
data.graphics_listen_addr_spice = CONF.spice.server_listen
data.serial_listen_addr = None
# Notes(eliqiao): block_migration and disk_over_commit are not
# nullable, so just don't set them if they are None
if block_migration is not None:
data.block_migration = block_migration
if disk_over_commit is not None:
data.disk_over_commit = disk_over_commit
data.disk_available_mb = 100000
data.is_shared_block_storage = True
data.is_shared_instance_path = True
return data
def check_can_live_migrate_source(self, context, instance,
dest_check_data, block_device_info=None):
return dest_check_data
def finish_migration(self, context, migration, instance, disk_info,
network_info, image_meta, resize_instance,
allocations, block_device_info=None, power_on=True,
share_info=None):
injected_files = admin_password = None
# Finish migration is just like spawning the guest on a destination
# host during resize/cold migrate, so reuse the spawn() fake to
# claim resources and track the instance on this "hypervisor".
self.spawn(context, instance, image_meta, injected_files,
admin_password, allocations,
block_device_info=block_device_info, power_on=power_on)
def confirm_migration(self, context, migration, instance, network_info):
# Confirm migration cleans up the guest from the source host so just
# destroy the guest to remove it from the list of tracked instances
# unless it is a same-host resize.
if migration.source_compute != migration.dest_compute:
self.destroy(context, instance, network_info)
def pre_live_migration(self, context, instance, block_device_info,
network_info, disk_info, migrate_data):
return migrate_data
def rollback_live_migration_at_destination(self, context, instance,
network_info,
block_device_info,
destroy_disks=True,
migrate_data=None):
return
def _test_remove_vm(self, instance_uuid):
"""Removes the named VM, as if it crashed. For testing."""
self.instances.pop(instance_uuid)
def host_power_action(self, action):
"""Reboots, shuts down or powers up the host."""
return action
def host_maintenance_mode(self, host, mode):
"""Start/Stop host maintenance window. On start, it triggers
guest VMs evacuation.
"""
if not mode:
return 'off_maintenance'
return 'on_maintenance'
def set_host_enabled(self, enabled):
"""Sets the specified host's ability to accept new instances."""
if enabled:
return 'enabled'
return 'disabled'
def get_volume_connector(self, instance):
return {'ip': CONF.my_block_storage_ip,
'initiator': 'fake',
'host': self._host}
def get_available_nodes(self, refresh=False):
return self._nodes
def get_nodenames_by_uuid(self, refresh=False):
return {str(getattr(uuids, 'node_%s' % n)): n
for n in self.get_available_nodes()}
def instance_on_disk(self, instance):
return False
def quiesce(self, context, instance, image_meta):
pass
def unquiesce(self, context, instance, image_meta):
pass
class FakeVirtAPI(virtapi.VirtAPI):
@contextlib.contextmanager
def wait_for_instance_event(self, instance, event_names, timeout=300,
error_callback=None):
# NOTE(danms): Don't actually wait for any events, just
# fall through
yield
def exit_wait_early(self, events):
# We never wait, so there is nothing to exit early
pass
def update_compute_provider_status(self, context, rp_uuid, enabled):
pass
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 = 2
memory_mb = 8192
local_gb = 1028
class MediumFakeDriver(FakeDriver):
# Fake driver that has enough resources to host more than one instance
# but not that much that cannot be exhausted easily
vcpus = 10
memory_mb = 8192
local_gb = 1028
class SameHostColdMigrateDriver(MediumFakeDriver):
"""MediumFakeDriver variant that supports same-host cold migrate."""
capabilities = dict(FakeDriver.capabilities,
supports_migrate_to_same_host=True)
class RescueBFVDriver(MediumFakeDriver):
capabilities = dict(FakeDriver.capabilities, supports_bfv_rescue=True)
class PowerUpdateFakeDriver(SmallFakeDriver):
# A specific fake driver for the power-update external event testing.
def __init__(self, virtapi):
super(PowerUpdateFakeDriver, self).__init__(virtapi=None)
self.driver = ironic.IronicDriver(virtapi=virtapi)
def power_update_event(self, instance, target_power_state):
"""Update power state of the specified instance in the nova DB."""
self.driver.power_update_event(instance, target_power_state)
class MediumFakeDriverWithNestedCustomResources(MediumFakeDriver):
# A MediumFakeDriver variant that also reports CUSTOM_MAGIC resources on
# a nested resource provider
vcpus = 10
memory_mb = 8192
local_gb = 1028
child_resources = {
'CUSTOM_MAGIC': {
'total': 10,
'reserved': 0,
'min_unit': 1,
'max_unit': 10,
'step_size': 1,
'allocation_ratio': 1,
}
}
def update_provider_tree(self, provider_tree, nodename, allocations=None):
super(
MediumFakeDriverWithNestedCustomResources,
self).update_provider_tree(
provider_tree, nodename,
allocations=allocations)
if not provider_tree.exists(nodename + '-child'):
provider_tree.new_child(name=nodename + '-child',
parent=nodename)
provider_tree.update_inventory(nodename + '-child',
self.child_resources)
provider_tree.add_traits(
nodename + '-child', os_traits.OWNER_NOVA)
class FakeFinishMigrationFailDriver(FakeDriver):
"""FakeDriver variant that will raise an exception from finish_migration"""
def finish_migration(self, *args, **kwargs):
raise exception.VirtualInterfaceCreateException()
class PredictableNodeUUIDDriver(SmallFakeDriver):
"""SmallFakeDriver variant that reports a predictable node uuid in
get_available_resource, like IronicDriver.
"""
def get_available_resource(self, nodename):
resources = super(
PredictableNodeUUIDDriver, self).get_available_resource(nodename)
# This is used in ComputeNode.update_from_virt_driver which is called
# from the ResourceTracker when creating a ComputeNode.
resources['uuid'] = str(uuid.uuid5(uuid.NAMESPACE_DNS, nodename))
return resources
class FakeRescheduleDriver(FakeDriver):
"""FakeDriver derivative that triggers a reschedule on the first spawn
attempt. This is expected to only be used in tests that have more than
one compute service.
"""
# dict, keyed by instance uuid, mapped to a boolean telling us if the
# instance has been rescheduled or not
rescheduled = {}
def spawn(self, context, instance, image_meta, injected_files,
admin_password, allocations, network_info=None,
block_device_info=None, power_on=True, accel_info=None):
if not self.rescheduled.get(instance.uuid, False):
# We only reschedule on the first time something hits spawn().
self.rescheduled[instance.uuid] = True
raise exception.ComputeResourcesUnavailable(
reason='FakeRescheduleDriver')
super(FakeRescheduleDriver, self).spawn(
context, instance, image_meta, injected_files,
admin_password, allocations, network_info, block_device_info,
power_on)
class FakeRescheduleDriverWithNestedCustomResources(
FakeRescheduleDriver, MediumFakeDriverWithNestedCustomResources):
pass
class FakeBuildAbortDriver(FakeDriver):
"""FakeDriver derivative that always fails on spawn() with a
BuildAbortException so no reschedule is attempted.
"""
def spawn(self, context, instance, image_meta, injected_files,
admin_password, allocations, network_info=None,
block_device_info=None, power_on=True, accel_info=None):
raise exception.BuildAbortException(
instance_uuid=instance.uuid, reason='FakeBuildAbortDriver')
class FakeBuildAbortDriverWithNestedCustomResources(
FakeBuildAbortDriver, MediumFakeDriverWithNestedCustomResources):
pass
class FakeUnshelveSpawnFailDriver(FakeDriver):
"""FakeDriver derivative that always fails on spawn() with a
VirtualInterfaceCreateException when unshelving an offloaded instance.
"""
def spawn(self, context, instance, image_meta, injected_files,
admin_password, allocations, network_info=None,
block_device_info=None, power_on=True, accel_info=None):
if instance.vm_state == vm_states.SHELVED_OFFLOADED:
raise exception.VirtualInterfaceCreateException(
'FakeUnshelveSpawnFailDriver')
# Otherwise spawn normally during the initial build.
super(FakeUnshelveSpawnFailDriver, self).spawn(
context, instance, image_meta, injected_files,
admin_password, allocations, network_info, block_device_info,
power_on)
class FakeUnshelveSpawnFailDriverWithNestedCustomResources(
FakeUnshelveSpawnFailDriver, MediumFakeDriverWithNestedCustomResources):
pass
class FakeLiveMigrateDriver(FakeDriver):
"""FakeDriver derivative to handle force_complete and abort calls.
This module serves those tests that need to abort or force-complete
the live migration, thus the live migration will never be finished
without the force_complete_migration or delete_migration API calls.
"""
def __init__(self, virtapi, read_only=False):
super(FakeLiveMigrateDriver, self).__init__(virtapi, read_only)
self._migrating = True
self._abort_migration = True
def live_migration(self, context, instance, dest,
post_method, recover_method, block_migration=False,
migrate_data=None):
self._abort_migration = False
self._migrating = True
count = 0
while self._migrating and count < 50:
time.sleep(0.1)
count = count + 1
if self._abort_migration:
recover_method(context, instance, dest, migrate_data,
migration_status='cancelled')
else:
post_method(context, instance, dest, block_migration,
migrate_data)
def live_migration_force_complete(self, instance):
self._migrating = False
if instance.uuid in self.instances:
del self.instances[instance.uuid]
def live_migration_abort(self, instance):
self._abort_migration = True
self._migrating = False
def post_live_migration(self, context, instance, block_device_info,
migrate_data=None):
# Runs on the source host, called from
# ComputeManager._post_live_migration so just delete the instance
# from being tracked on the source host.
self.destroy(context, instance, network_info=None,
block_device_info=block_device_info)
class FakeLiveMigrateDriverWithNestedCustomResources(
FakeLiveMigrateDriver, MediumFakeDriverWithNestedCustomResources):
pass
class FakeDriverWithPciResources(SmallFakeDriver):
"""NOTE: this driver provides symmetric compute nodes. Each compute will
have the same resources with the same addresses. It is dangerous as using
this driver can hide issues when in an asymmetric environment nova fails to
update entities according to the host specific addresses (e.g. pci_slot of
the neutron port bindings).
The current non virt driver specific functional test environment has many
shortcomings making it really hard to simulate host specific virt drivers.
1) The virt driver is instantiated by the service logic from the name of
the driver class. This makes passing input to the driver instance from the
test at init time pretty impossible. This could be solved with some
fixtures around nova.virt.driver.load_compute_driver()
2) The compute service access the hypervisor not only via the virt
interface but also reads the sysfs of the host. So simply providing a fake
virt driver instance is not enough to isolate simulated compute services
that are running on the same host. Also these low level sysfs reads are not
having host specific information in the call params. So simply mocking the
low level call does not give a way to provide host specific return values.
3) CONF is global, and it is read dynamically by the driver. So
providing host specific CONF to driver instances without race conditions
between the drivers are extremely hard especially if periodic tasks are
enabled.
The libvirt based functional test env under nova.tests.functional.libvirt
has better support to create asymmetric environments. So please consider
using that if possible instead.
"""
PCI_ADDR_PF1 = '0000:01:00.0'
PCI_ADDR_PF1_VF1 = '0000:01:00.1'
PCI_ADDR_PF2 = '0000:02:00.0'
PCI_ADDR_PF2_VF1 = '0000:02:00.1'
PCI_ADDR_PF3 = '0000:03:00.0'
PCI_ADDR_PF3_VF1 = '0000:03:00.1'
# NOTE(gibi): Always use this fixture along with the
# FakeDriverWithPciResources to make the necessary configuration for the
# driver.
class FakeDriverWithPciResourcesConfigFixture(fixtures.Fixture):
def setUp(self):
super(FakeDriverWithPciResources.
FakeDriverWithPciResourcesConfigFixture, self).setUp()
# Set device_spec before the compute node starts to match
# with the PCI devices reported by this fake driver.
# NOTE(gibi): 0000:01:00 is tagged to physnet1 and therefore not a
# match based on physnet to our sriov port
# 'port_with_sriov_resource_request' as the network of that port
# points to physnet2 with the attribute
# 'provider:physical_network'. Nova pci handling already enforces
# this rule.
#
# 0000:02:00 and 0000:03:00 are both tagged to physnet2 and
# therefore a good match for our sriov port based on physnet.
# Having two PFs on the same physnet will allow us to test the
# placement allocation - physical allocation matching based on the
# bandwidth allocation in the future.
CONF.set_override('device_spec', override=[
jsonutils.dumps(
{
"address": {
"domain": "0000",
"bus": "01",
"slot": "00",
"function": ".*"},
"physical_network": "physnet1",
}
),
jsonutils.dumps(
{
"address": {
"domain": "0000",
"bus": "02",
"slot": "00",
"function": ".*"},
"physical_network": "physnet2",
}
),
jsonutils.dumps(
{
"address": {
"domain": "0000",
"bus": "03",
"slot": "00",
"function": ".*"},
"physical_network": "physnet2",
}
),
],
group='pci')
# These mocks should be removed after bug
# https://bugs.launchpad.net/nova/+bug/1961587 has been fixed and
# every SRIOV device related information is transferred through the
# virt driver and the PciDevice object instead of queried with
# sysfs calls by the network.neutron.API code.
self.useFixture(fixtures.MockPatch(
'nova.pci.utils.get_mac_by_pci_address',
return_value='52:54:00:1e:59:c6'))
self.useFixture(fixtures.MockPatch(
'nova.pci.utils.get_vf_num_by_pci_address',
return_value=1))
def get_available_resource(self, nodename):
host_status = super(
FakeDriverWithPciResources, self).get_available_resource(nodename)
# 01:00.0 - PF - ens1
# |---- 01:00.1 - VF
#
# 02:00.0 - PF - ens2
# |---- 02:00.1 - VF
#
# 03:00.0 - PF - ens3
# |---- 03:00.1 - VF
host_status['pci_passthrough_devices'] = jsonutils.dumps([
{
'address': self.PCI_ADDR_PF1,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-PF',
'parent_addr': None,
'numa_node': 0,
'label': 'fake-label',
},
{
'address': self.PCI_ADDR_PF1_VF1,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-VF',
'parent_addr': self.PCI_ADDR_PF1,
'numa_node': 0,
'label': 'fake-label',
"parent_ifname": self._host + "-ens1",
},
{
'address': self.PCI_ADDR_PF2,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-PF',
'parent_addr': None,
'numa_node': 0,
'label': 'fake-label',
},
{
'address': self.PCI_ADDR_PF2_VF1,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-VF',
'parent_addr': self.PCI_ADDR_PF2,
'numa_node': 0,
'label': 'fake-label',
"parent_ifname": self._host + "-ens2",
},
{
'address': self.PCI_ADDR_PF3,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-PF',
'parent_addr': None,
'numa_node': 0,
'label': 'fake-label',
},
{
'address': self.PCI_ADDR_PF3_VF1,
'product_id': 'fake-product_id',
'vendor_id': 'fake-vendor_id',
'status': 'available',
'dev_type': 'type-VF',
'parent_addr': self.PCI_ADDR_PF3,
'numa_node': 0,
'label': 'fake-label',
"parent_ifname": self._host + "-ens3",
},
])
return host_status
class FakeLiveMigrateDriverWithPciResources(
FakeLiveMigrateDriver, FakeDriverWithPciResources):
"""FakeDriver derivative to handle force_complete and abort calls.
This module serves those tests that need to abort or force-complete
the live migration, thus the live migration will never be finished
without the force_complete_migration or delete_migration API calls.
"""
class FakeDriverWithCaching(FakeDriver):
def __init__(self, *a, **k):
super(FakeDriverWithCaching, self).__init__(*a, **k)
self.cached_images = set()
def cache_image(self, context, image_id):
if image_id in self.cached_images:
return False
else:
self.cached_images.add(image_id)
return True
class EphEncryptionDriver(MediumFakeDriver):
capabilities = dict(
FakeDriver.capabilities,
supports_ephemeral_encryption=True)
class EphEncryptionDriverLUKS(MediumFakeDriver):
capabilities = dict(
FakeDriver.capabilities,
supports_ephemeral_encryption=True,
supports_ephemeral_encryption_luks=True)
class EphEncryptionDriverPLAIN(MediumFakeDriver):
capabilities = dict(
FakeDriver.capabilities,
supports_ephemeral_encryption=True,
supports_ephemeral_encryption_plain=True)
class FakeDriverWithoutFakeNodes(FakeDriver):
"""FakeDriver that behaves like a real single-node driver.
This behaves like a real virt driver from the perspective of its
nodes, with a stable nodename and use of the global node identity
stuff to provide a stable node UUID.
"""
def get_available_resource(self, nodename):
resources = super().get_available_resource(nodename)
resources['uuid'] = nova.virt.node.get_local_node_uuid()
return resources
def get_nodenames_by_uuid(self, refresh=False):
return {
nova.virt.node.get_local_node_uuid(): self.get_available_nodes()[0]
}
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