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instance.py
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instance.py
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# Copyright 2013 IBM Corp.
#
# 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.
import contextlib
from oslo_config import cfg
from oslo_db import exception as db_exc
from oslo_log import log as logging
from oslo_serialization import jsonutils
from oslo_utils import timeutils
from oslo_utils import versionutils
from sqlalchemy.orm import joinedload
from nova.cells import opts as cells_opts
from nova.cells import rpcapi as cells_rpcapi
from nova.cells import utils as cells_utils
from nova.compute import task_states
from nova.compute import vm_states
from nova import db
from nova.db.sqlalchemy import api as db_api
from nova.db.sqlalchemy import models
from nova import exception
from nova.i18n import _LE, _LW
from nova import notifications
from nova import objects
from nova.objects import base
from nova.objects import fields
from nova import utils
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
# List of fields that can be joined in DB layer.
_INSTANCE_OPTIONAL_JOINED_FIELDS = ['metadata', 'system_metadata',
'info_cache', 'security_groups',
'pci_devices', 'tags', 'services']
# These are fields that are optional but don't translate to db columns
_INSTANCE_OPTIONAL_NON_COLUMN_FIELDS = ['fault', 'flavor', 'old_flavor',
'new_flavor', 'ec2_ids']
# These are fields that are optional and in instance_extra
_INSTANCE_EXTRA_FIELDS = ['numa_topology', 'pci_requests',
'flavor', 'vcpu_model', 'migration_context',
'keypairs', 'device_metadata']
# These are fields that applied/drooped by migration_context
_MIGRATION_CONTEXT_ATTRS = ['numa_topology', 'pci_requests',
'pci_devices']
# These are fields that can be specified as expected_attrs
INSTANCE_OPTIONAL_ATTRS = (_INSTANCE_OPTIONAL_JOINED_FIELDS +
_INSTANCE_OPTIONAL_NON_COLUMN_FIELDS +
_INSTANCE_EXTRA_FIELDS)
# These are fields that most query calls load by default
INSTANCE_DEFAULT_FIELDS = ['metadata', 'system_metadata',
'info_cache', 'security_groups']
# Maximum count of tags to one instance
MAX_TAG_COUNT = 50
def _expected_cols(expected_attrs):
"""Return expected_attrs that are columns needing joining.
NB: This function may modify expected_attrs if one
requested attribute requires another.
"""
if not expected_attrs:
return expected_attrs
simple_cols = [attr for attr in expected_attrs
if attr in _INSTANCE_OPTIONAL_JOINED_FIELDS]
complex_cols = ['extra.%s' % field
for field in _INSTANCE_EXTRA_FIELDS
if field in expected_attrs]
if complex_cols:
simple_cols.append('extra')
simple_cols = [x for x in simple_cols if x not in _INSTANCE_EXTRA_FIELDS]
expected_cols = simple_cols + complex_cols
# NOTE(pumaranikar): expected_cols list can contain duplicates since
# caller appends column attributes to expected_attr without checking if
# it is already present in the list or not. Hence, we remove duplicates
# here, if any. The resultant list is sorted based on list index to
# maintain the insertion order.
return sorted(list(set(expected_cols)), key=expected_cols.index)
_NO_DATA_SENTINEL = object()
# TODO(berrange): Remove NovaObjectDictCompat
@base.NovaObjectRegistry.register
class Instance(base.NovaPersistentObject, base.NovaObject,
base.NovaObjectDictCompat):
# Version 2.0: Initial version
# Version 2.1: Added services
# Version 2.2: Added keypairs
# Version 2.3: Added device_metadata
VERSION = '2.3'
fields = {
'id': fields.IntegerField(),
'user_id': fields.StringField(nullable=True),
'project_id': fields.StringField(nullable=True),
'image_ref': fields.StringField(nullable=True),
'kernel_id': fields.StringField(nullable=True),
'ramdisk_id': fields.StringField(nullable=True),
'hostname': fields.StringField(nullable=True),
'launch_index': fields.IntegerField(nullable=True),
'key_name': fields.StringField(nullable=True),
'key_data': fields.StringField(nullable=True),
'power_state': fields.IntegerField(nullable=True),
'vm_state': fields.StringField(nullable=True),
'task_state': fields.StringField(nullable=True),
'services': fields.ObjectField('ServiceList'),
'memory_mb': fields.IntegerField(nullable=True),
'vcpus': fields.IntegerField(nullable=True),
'root_gb': fields.IntegerField(nullable=True),
'ephemeral_gb': fields.IntegerField(nullable=True),
'ephemeral_key_uuid': fields.UUIDField(nullable=True),
'host': fields.StringField(nullable=True),
'node': fields.StringField(nullable=True),
'instance_type_id': fields.IntegerField(nullable=True),
'user_data': fields.StringField(nullable=True),
'reservation_id': fields.StringField(nullable=True),
'launched_at': fields.DateTimeField(nullable=True),
'terminated_at': fields.DateTimeField(nullable=True),
'availability_zone': fields.StringField(nullable=True),
'display_name': fields.StringField(nullable=True),
'display_description': fields.StringField(nullable=True),
'launched_on': fields.StringField(nullable=True),
# NOTE(jdillaman): locked deprecated in favor of locked_by,
# to be removed in Icehouse
'locked': fields.BooleanField(default=False),
'locked_by': fields.StringField(nullable=True),
'os_type': fields.StringField(nullable=True),
'architecture': fields.StringField(nullable=True),
'vm_mode': fields.StringField(nullable=True),
'uuid': fields.UUIDField(),
'root_device_name': fields.StringField(nullable=True),
'default_ephemeral_device': fields.StringField(nullable=True),
'default_swap_device': fields.StringField(nullable=True),
'config_drive': fields.StringField(nullable=True),
'access_ip_v4': fields.IPV4AddressField(nullable=True),
'access_ip_v6': fields.IPV6AddressField(nullable=True),
'auto_disk_config': fields.BooleanField(default=False),
'progress': fields.IntegerField(nullable=True),
'shutdown_terminate': fields.BooleanField(default=False),
'disable_terminate': fields.BooleanField(default=False),
'cell_name': fields.StringField(nullable=True),
'metadata': fields.DictOfStringsField(),
'system_metadata': fields.DictOfNullableStringsField(),
'info_cache': fields.ObjectField('InstanceInfoCache',
nullable=True),
'security_groups': fields.ObjectField('SecurityGroupList'),
'fault': fields.ObjectField('InstanceFault', nullable=True),
'cleaned': fields.BooleanField(default=False),
'pci_devices': fields.ObjectField('PciDeviceList', nullable=True),
'numa_topology': fields.ObjectField('InstanceNUMATopology',
nullable=True),
'pci_requests': fields.ObjectField('InstancePCIRequests',
nullable=True),
'device_metadata': fields.ObjectField('InstanceDeviceMetadata',
nullable=True),
'tags': fields.ObjectField('TagList'),
'flavor': fields.ObjectField('Flavor'),
'old_flavor': fields.ObjectField('Flavor', nullable=True),
'new_flavor': fields.ObjectField('Flavor', nullable=True),
'vcpu_model': fields.ObjectField('VirtCPUModel', nullable=True),
'ec2_ids': fields.ObjectField('EC2Ids'),
'migration_context': fields.ObjectField('MigrationContext',
nullable=True),
'keypairs': fields.ObjectField('KeyPairList'),
}
obj_extra_fields = ['name']
def obj_make_compatible(self, primitive, target_version):
super(Instance, self).obj_make_compatible(primitive, target_version)
target_version = versionutils.convert_version_to_tuple(target_version)
if target_version < (2, 3) and 'device_metadata' in primitive:
del primitive['device_metadata']
if target_version < (2, 2) and 'keypairs' in primitive:
del primitive['keypairs']
if target_version < (2, 1) and 'services' in primitive:
del primitive['services']
def __init__(self, *args, **kwargs):
super(Instance, self).__init__(*args, **kwargs)
self._reset_metadata_tracking()
@property
def image_meta(self):
return objects.ImageMeta.from_instance(self)
def _reset_metadata_tracking(self, fields=None):
if fields is None or 'system_metadata' in fields:
self._orig_system_metadata = (dict(self.system_metadata) if
'system_metadata' in self else {})
if fields is None or 'metadata' in fields:
self._orig_metadata = (dict(self.metadata) if
'metadata' in self else {})
def obj_clone(self):
"""Create a copy of this instance object."""
nobj = super(Instance, self).obj_clone()
# Since the base object only does a deep copy of the defined fields,
# need to make sure to also copy the additional tracking metadata
# attributes so they don't show as changed and cause the metadata
# to always be updated even when stale information.
if hasattr(self, '_orig_metadata'):
nobj._orig_metadata = dict(self._orig_metadata)
if hasattr(self, '_orig_system_metadata'):
nobj._orig_system_metadata = dict(self._orig_system_metadata)
return nobj
def obj_reset_changes(self, fields=None, recursive=False):
super(Instance, self).obj_reset_changes(fields,
recursive=recursive)
self._reset_metadata_tracking(fields=fields)
def obj_what_changed(self):
changes = super(Instance, self).obj_what_changed()
if 'metadata' in self and self.metadata != self._orig_metadata:
changes.add('metadata')
if 'system_metadata' in self and (self.system_metadata !=
self._orig_system_metadata):
changes.add('system_metadata')
return changes
@classmethod
def _obj_from_primitive(cls, context, objver, primitive):
self = super(Instance, cls)._obj_from_primitive(context, objver,
primitive)
self._reset_metadata_tracking()
return self
@property
def name(self):
try:
base_name = CONF.instance_name_template % self.id
except TypeError:
# Support templates like "uuid-%(uuid)s", etc.
info = {}
# NOTE(russellb): Don't use self.iteritems() here, as it will
# result in infinite recursion on the name property.
for key in self.fields:
if key == 'name':
# NOTE(danms): prevent recursion
continue
elif not self.obj_attr_is_set(key):
# NOTE(danms): Don't trigger lazy-loads
continue
info[key] = self[key]
try:
base_name = CONF.instance_name_template % info
except KeyError:
base_name = self.uuid
except exception.ObjectActionError:
# This indicates self.id was not set and could not be lazy loaded.
# What this means is the instance has not been persisted to a db
# yet, which should indicate it has not been scheduled yet. In this
# situation it will have a blank name.
if (self.vm_state == vm_states.BUILDING and
self.task_state == task_states.SCHEDULING):
base_name = ''
else:
# If the vm/task states don't indicate that it's being booted
# then we have a bug here. Log an error and attempt to return
# the uuid which is what an error above would return.
LOG.error(_LE('Could not lazy-load instance.id while '
'attempting to generate the instance name.'))
base_name = self.uuid
return base_name
def _flavor_from_db(self, db_flavor):
"""Load instance flavor information from instance_extra."""
flavor_info = jsonutils.loads(db_flavor)
self.flavor = objects.Flavor.obj_from_primitive(flavor_info['cur'])
if flavor_info['old']:
self.old_flavor = objects.Flavor.obj_from_primitive(
flavor_info['old'])
else:
self.old_flavor = None
if flavor_info['new']:
self.new_flavor = objects.Flavor.obj_from_primitive(
flavor_info['new'])
else:
self.new_flavor = None
self.obj_reset_changes(['flavor', 'old_flavor', 'new_flavor'])
@staticmethod
def _from_db_object(context, instance, db_inst, expected_attrs=None):
"""Method to help with migration to objects.
Converts a database entity to a formal object.
"""
instance._context = context
if expected_attrs is None:
expected_attrs = []
# Most of the field names match right now, so be quick
for field in instance.fields:
if field in INSTANCE_OPTIONAL_ATTRS:
continue
elif field == 'deleted':
instance.deleted = db_inst['deleted'] == db_inst['id']
elif field == 'cleaned':
instance.cleaned = db_inst['cleaned'] == 1
else:
instance[field] = db_inst[field]
# NOTE(danms): We can be called with a dict instead of a
# SQLAlchemy object, so we have to be careful here
if hasattr(db_inst, '__dict__'):
have_extra = 'extra' in db_inst.__dict__ and db_inst['extra']
else:
have_extra = 'extra' in db_inst and db_inst['extra']
if 'metadata' in expected_attrs:
instance['metadata'] = utils.instance_meta(db_inst)
if 'system_metadata' in expected_attrs:
instance['system_metadata'] = utils.instance_sys_meta(db_inst)
if 'fault' in expected_attrs:
instance['fault'] = (
objects.InstanceFault.get_latest_for_instance(
context, instance.uuid))
if 'numa_topology' in expected_attrs:
if have_extra:
instance._load_numa_topology(
db_inst['extra'].get('numa_topology'))
else:
instance.numa_topology = None
if 'pci_requests' in expected_attrs:
if have_extra:
instance._load_pci_requests(
db_inst['extra'].get('pci_requests'))
else:
instance.pci_requests = None
if 'device_metadata' in expected_attrs:
if have_extra:
instance._load_device_metadata(
db_inst['extra'].get('device_metadata'))
else:
instance.device_metadata = None
if 'vcpu_model' in expected_attrs:
if have_extra:
instance._load_vcpu_model(
db_inst['extra'].get('vcpu_model'))
else:
instance.vcpu_model = None
if 'ec2_ids' in expected_attrs:
instance._load_ec2_ids()
if 'migration_context' in expected_attrs:
if have_extra:
instance._load_migration_context(
db_inst['extra'].get('migration_context'))
else:
instance.migration_context = None
if 'keypairs' in expected_attrs:
if have_extra:
instance._load_keypairs(db_inst['extra'].get('keypairs'))
if 'info_cache' in expected_attrs:
if db_inst.get('info_cache') is None:
instance.info_cache = None
elif not instance.obj_attr_is_set('info_cache'):
# TODO(danms): If this ever happens on a backlevel instance
# passed to us by a backlevel service, things will break
instance.info_cache = objects.InstanceInfoCache(context)
if instance.info_cache is not None:
instance.info_cache._from_db_object(context,
instance.info_cache,
db_inst['info_cache'])
if any([x in expected_attrs for x in ('flavor',
'old_flavor',
'new_flavor')]):
if have_extra and db_inst['extra'].get('flavor'):
instance._flavor_from_db(db_inst['extra']['flavor'])
# TODO(danms): If we are updating these on a backlevel instance,
# we'll end up sending back new versions of these objects (see
# above note for new info_caches
if 'pci_devices' in expected_attrs:
pci_devices = base.obj_make_list(
context, objects.PciDeviceList(context),
objects.PciDevice, db_inst['pci_devices'])
instance['pci_devices'] = pci_devices
if 'security_groups' in expected_attrs:
sec_groups = base.obj_make_list(
context, objects.SecurityGroupList(context),
objects.SecurityGroup, db_inst.get('security_groups', []))
instance['security_groups'] = sec_groups
if 'tags' in expected_attrs:
tags = base.obj_make_list(
context, objects.TagList(context),
objects.Tag, db_inst['tags'])
instance['tags'] = tags
if 'services' in expected_attrs:
services = base.obj_make_list(
context, objects.ServiceList(context),
objects.Service, db_inst['services'])
instance['services'] = services
instance.obj_reset_changes()
return instance
@staticmethod
@db.select_db_reader_mode
def _db_instance_get_by_uuid(context, uuid, columns_to_join,
use_slave=False):
return db.instance_get_by_uuid(context, uuid,
columns_to_join=columns_to_join)
@base.remotable_classmethod
def get_by_uuid(cls, context, uuid, expected_attrs=None, use_slave=False):
if expected_attrs is None:
expected_attrs = ['info_cache', 'security_groups']
columns_to_join = _expected_cols(expected_attrs)
db_inst = cls._db_instance_get_by_uuid(context, uuid, columns_to_join,
use_slave=use_slave)
return cls._from_db_object(context, cls(), db_inst,
expected_attrs)
@base.remotable_classmethod
def get_by_id(cls, context, inst_id, expected_attrs=None):
if expected_attrs is None:
expected_attrs = ['info_cache', 'security_groups']
columns_to_join = _expected_cols(expected_attrs)
db_inst = db.instance_get(context, inst_id,
columns_to_join=columns_to_join)
return cls._from_db_object(context, cls(), db_inst,
expected_attrs)
@base.remotable
def create(self):
if self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='create',
reason='already created')
if self.obj_attr_is_set('deleted') and self.deleted:
raise exception.ObjectActionError(action='create',
reason='already deleted')
updates = self.obj_get_changes()
# NOTE(danms): We know because of the check above that deleted
# is either unset or false. Since we need to avoid passing False
# down to the DB layer (which uses an integer), we can always
# default it to zero here.
updates['deleted'] = 0
expected_attrs = [attr for attr in INSTANCE_DEFAULT_FIELDS
if attr in updates]
if 'security_groups' in updates:
updates['security_groups'] = [x.name for x in
updates['security_groups']]
if 'info_cache' in updates:
updates['info_cache'] = {
'network_info': updates['info_cache'].network_info.json()
}
updates['extra'] = {}
numa_topology = updates.pop('numa_topology', None)
expected_attrs.append('numa_topology')
if numa_topology:
updates['extra']['numa_topology'] = numa_topology._to_json()
else:
updates['extra']['numa_topology'] = None
pci_requests = updates.pop('pci_requests', None)
expected_attrs.append('pci_requests')
if pci_requests:
updates['extra']['pci_requests'] = (
pci_requests.to_json())
else:
updates['extra']['pci_requests'] = None
device_metadata = updates.pop('device_metadata', None)
expected_attrs.append('device_metadata')
if device_metadata:
updates['extra']['device_metadata'] = (
device_metadata._to_json())
else:
updates['extra']['device_metadata'] = None
flavor = updates.pop('flavor', None)
if flavor:
expected_attrs.append('flavor')
old = ((self.obj_attr_is_set('old_flavor') and
self.old_flavor) and
self.old_flavor.obj_to_primitive() or None)
new = ((self.obj_attr_is_set('new_flavor') and
self.new_flavor) and
self.new_flavor.obj_to_primitive() or None)
flavor_info = {
'cur': self.flavor.obj_to_primitive(),
'old': old,
'new': new,
}
updates['extra']['flavor'] = jsonutils.dumps(flavor_info)
keypairs = updates.pop('keypairs', None)
if keypairs is not None:
expected_attrs.append('keypairs')
updates['extra']['keypairs'] = jsonutils.dumps(
keypairs.obj_to_primitive())
vcpu_model = updates.pop('vcpu_model', None)
expected_attrs.append('vcpu_model')
if vcpu_model:
updates['extra']['vcpu_model'] = (
jsonutils.dumps(vcpu_model.obj_to_primitive()))
else:
updates['extra']['vcpu_model'] = None
db_inst = db.instance_create(self._context, updates)
self._from_db_object(self._context, self, db_inst, expected_attrs)
# NOTE(danms): The EC2 ids are created on their first load. In order
# to avoid them being missing and having to be loaded later, we
# load them once here on create now that the instance record is
# created.
self._load_ec2_ids()
self.obj_reset_changes(['ec2_ids'])
@base.remotable
def destroy(self):
if not self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='destroy',
reason='already destroyed')
if not self.obj_attr_is_set('uuid'):
raise exception.ObjectActionError(action='destroy',
reason='no uuid')
if not self.obj_attr_is_set('host') or not self.host:
# NOTE(danms): If our host is not set, avoid a race
constraint = db.constraint(host=db.equal_any(None))
else:
constraint = None
cell_type = cells_opts.get_cell_type()
if cell_type is not None:
stale_instance = self.obj_clone()
try:
db_inst = db.instance_destroy(self._context, self.uuid,
constraint=constraint)
self._from_db_object(self._context, self, db_inst)
except exception.ConstraintNotMet:
raise exception.ObjectActionError(action='destroy',
reason='host changed')
if cell_type == 'compute':
cells_api = cells_rpcapi.CellsAPI()
cells_api.instance_destroy_at_top(self._context, stale_instance)
delattr(self, base.get_attrname('id'))
def _save_info_cache(self, context):
if self.info_cache:
with self.info_cache.obj_alternate_context(context):
self.info_cache.save()
def _save_security_groups(self, context):
security_groups = self.security_groups or []
for secgroup in security_groups:
with secgroup.obj_alternate_context(context):
secgroup.save()
self.security_groups.obj_reset_changes()
def _save_fault(self, context):
# NOTE(danms): I don't think we need to worry about this, do we?
pass
def _save_pci_requests(self, context):
# TODO(danms): Unfortunately, extra.pci_requests is not a serialized
# PciRequests object (!), so we have to handle it specially here.
# That should definitely be fixed!
self._extra_values_to_save['pci_requests'] = (
self.pci_requests.to_json())
def _save_pci_devices(self, context):
# NOTE(yjiang5): All devices held by PCI tracker, only PCI tracker
# permitted to update the DB. all change to devices from here will
# be dropped.
pass
def _save_flavor(self, context):
if not any([x in self.obj_what_changed() for x in
('flavor', 'old_flavor', 'new_flavor')]):
return
flavor_info = {
'cur': self.flavor.obj_to_primitive(),
'old': (self.old_flavor and
self.old_flavor.obj_to_primitive() or None),
'new': (self.new_flavor and
self.new_flavor.obj_to_primitive() or None),
}
self._extra_values_to_save['flavor'] = jsonutils.dumps(flavor_info)
self.obj_reset_changes(['flavor', 'old_flavor', 'new_flavor'])
def _save_old_flavor(self, context):
if 'old_flavor' in self.obj_what_changed():
self._save_flavor(context)
def _save_new_flavor(self, context):
if 'new_flavor' in self.obj_what_changed():
self._save_flavor(context)
def _save_ec2_ids(self, context):
# NOTE(hanlind): Read-only so no need to save this.
pass
def _save_keypairs(self, context):
# NOTE(danms): Read-only so no need to save this.
pass
def _save_extra_generic(self, field):
if field in self.obj_what_changed():
obj = getattr(self, field)
value = None
if obj is not None:
value = jsonutils.dumps(obj.obj_to_primitive())
self._extra_values_to_save[field] = value
@base.remotable
def save(self, expected_vm_state=None,
expected_task_state=None, admin_state_reset=False):
"""Save updates to this instance
Column-wise updates will be made based on the result of
self.what_changed(). If expected_task_state is provided,
it will be checked against the in-database copy of the
instance before updates are made.
:param:context: Security context
:param:expected_task_state: Optional tuple of valid task states
for the instance to be in
:param:expected_vm_state: Optional tuple of valid vm states
for the instance to be in
:param admin_state_reset: True if admin API is forcing setting
of task_state/vm_state
"""
# Store this on the class because _cell_name_blocks_sync is useless
# after the db update call below.
self._sync_cells = not self._cell_name_blocks_sync()
context = self._context
cell_type = cells_opts.get_cell_type()
if cell_type is not None:
# NOTE(comstud): We need to stash a copy of ourselves
# before any updates are applied. When we call the save
# methods on nested objects, we will lose any changes to
# them. But we need to make sure child cells can tell
# what is changed.
#
# We also need to nuke any updates to vm_state and task_state
# unless admin_state_reset is True. compute cells are
# authoritative for their view of vm_state and task_state.
stale_instance = self.obj_clone()
cells_update_from_api = (cell_type == 'api' and self.cell_name and
self._sync_cells)
if cells_update_from_api:
def _handle_cell_update_from_api():
cells_api = cells_rpcapi.CellsAPI()
cells_api.instance_update_from_api(context, stale_instance,
expected_vm_state,
expected_task_state,
admin_state_reset)
self._extra_values_to_save = {}
updates = {}
changes = self.obj_what_changed()
for field in self.fields:
# NOTE(danms): For object fields, we construct and call a
# helper method like self._save_$attrname()
if (self.obj_attr_is_set(field) and
isinstance(self.fields[field], fields.ObjectField)):
try:
getattr(self, '_save_%s' % field)(context)
except AttributeError:
if field in _INSTANCE_EXTRA_FIELDS:
self._save_extra_generic(field)
continue
LOG.exception(_LE('No save handler for %s'), field,
instance=self)
except db_exc.DBReferenceError as exp:
if exp.key != 'instance_uuid':
raise
# NOTE(melwitt): This will happen if we instance.save()
# before an instance.create() and FK constraint fails.
# In practice, this occurs in cells during a delete of
# an unscheduled instance. Otherwise, it could happen
# as a result of bug.
raise exception.InstanceNotFound(instance_id=self.uuid)
elif field in changes:
if (field == 'cell_name' and self[field] is not None and
self[field].startswith(cells_utils.BLOCK_SYNC_FLAG)):
updates[field] = self[field].replace(
cells_utils.BLOCK_SYNC_FLAG, '', 1)
else:
updates[field] = self[field]
if self._extra_values_to_save:
db.instance_extra_update_by_uuid(context, self.uuid,
self._extra_values_to_save)
if not updates:
if cells_update_from_api:
_handle_cell_update_from_api()
return
# Cleaned needs to be turned back into an int here
if 'cleaned' in updates:
if updates['cleaned']:
updates['cleaned'] = 1
else:
updates['cleaned'] = 0
if expected_task_state is not None:
updates['expected_task_state'] = expected_task_state
if expected_vm_state is not None:
updates['expected_vm_state'] = expected_vm_state
expected_attrs = [attr for attr in _INSTANCE_OPTIONAL_JOINED_FIELDS
if self.obj_attr_is_set(attr)]
if 'pci_devices' in expected_attrs:
# NOTE(danms): We don't refresh pci_devices on save right now
expected_attrs.remove('pci_devices')
# NOTE(alaski): We need to pull system_metadata for the
# notification.send_update() below. If we don't there's a KeyError
# when it tries to extract the flavor.
# NOTE(danms): If we have sysmeta, we need flavor since the caller
# might be expecting flavor information as a result
if 'system_metadata' not in expected_attrs:
expected_attrs.append('system_metadata')
expected_attrs.append('flavor')
old_ref, inst_ref = db.instance_update_and_get_original(
context, self.uuid, updates,
columns_to_join=_expected_cols(expected_attrs))
self._from_db_object(context, self, inst_ref,
expected_attrs=expected_attrs)
if cells_update_from_api:
_handle_cell_update_from_api()
elif cell_type == 'compute':
if self._sync_cells:
cells_api = cells_rpcapi.CellsAPI()
cells_api.instance_update_at_top(context, stale_instance)
def _notify():
# NOTE(danms): We have to be super careful here not to trigger
# any lazy-loads that will unmigrate or unbackport something. So,
# make a copy of the instance for notifications first.
new_ref = self.obj_clone()
notifications.send_update(context, old_ref, new_ref)
# NOTE(alaski): If cell synchronization is blocked it means we have
# already run this block of code in either the parent or child of this
# cell. Therefore this notification has already been sent.
if not self._sync_cells:
_notify = lambda: None # noqa: F811
_notify()
self.obj_reset_changes()
@base.remotable
def refresh(self, use_slave=False):
extra = [field for field in INSTANCE_OPTIONAL_ATTRS
if self.obj_attr_is_set(field)]
current = self.__class__.get_by_uuid(self._context, uuid=self.uuid,
expected_attrs=extra,
use_slave=use_slave)
# NOTE(danms): We orphan the instance copy so we do not unexpectedly
# trigger a lazy-load (which would mean we failed to calculate the
# expected_attrs properly)
current._context = None
for field in self.fields:
if self.obj_attr_is_set(field):
if field == 'info_cache':
self.info_cache.refresh()
elif self[field] != current[field]:
self[field] = current[field]
self.obj_reset_changes()
def _load_generic(self, attrname):
with utils.temporary_mutation(self._context, read_deleted='yes'):
instance = self.__class__.get_by_uuid(self._context,
uuid=self.uuid,
expected_attrs=[attrname])
# NOTE(danms): Never allow us to recursively-load
if instance.obj_attr_is_set(attrname):
self[attrname] = instance[attrname]
else:
raise exception.ObjectActionError(
action='obj_load_attr',
reason='loading %s requires recursion' % attrname)
def _load_fault(self):
self.fault = objects.InstanceFault.get_latest_for_instance(
self._context, self.uuid)
def _load_numa_topology(self, db_topology=_NO_DATA_SENTINEL):
if db_topology is None:
self.numa_topology = None
elif db_topology is not _NO_DATA_SENTINEL:
self.numa_topology = \
objects.InstanceNUMATopology.obj_from_db_obj(self.uuid,
db_topology)
else:
try:
self.numa_topology = \
objects.InstanceNUMATopology.get_by_instance_uuid(
self._context, self.uuid)
except exception.NumaTopologyNotFound:
self.numa_topology = None
def _load_pci_requests(self, db_requests=_NO_DATA_SENTINEL):
if db_requests is not _NO_DATA_SENTINEL:
self.pci_requests = objects.InstancePCIRequests.obj_from_db(
self._context, self.uuid, db_requests)
else:
self.pci_requests = \
objects.InstancePCIRequests.get_by_instance_uuid(
self._context, self.uuid)
def _load_device_metadata(self, db_dev_meta=_NO_DATA_SENTINEL):
if db_dev_meta is None:
self.device_metadata = None
elif db_dev_meta is not _NO_DATA_SENTINEL:
self.device_metadata = \
objects.InstanceDeviceMetadata.obj_from_db(
self._context, db_dev_meta)
else:
self.device_metadata = \
objects.InstanceDeviceMetadata.get_by_instance_uuid(
self._context, self.uuid)
def _load_flavor(self):
instance = self.__class__.get_by_uuid(
self._context, uuid=self.uuid,
expected_attrs=['flavor', 'system_metadata'])
# NOTE(danms): Orphan the instance to make sure we don't lazy-load
# anything below
instance._context = None
self.flavor = instance.flavor
self.old_flavor = instance.old_flavor
self.new_flavor = instance.new_flavor
# NOTE(danms): The query above may have migrated the flavor from
# system_metadata. Since we have it anyway, go ahead and refresh
# our system_metadata from it so that a save will be accurate.
instance.system_metadata.update(self.get('system_metadata', {}))
self.system_metadata = instance.system_metadata
def _load_vcpu_model(self, db_vcpu_model=_NO_DATA_SENTINEL):
if db_vcpu_model is None:
self.vcpu_model = None
elif db_vcpu_model is _NO_DATA_SENTINEL:
self.vcpu_model = objects.VirtCPUModel.get_by_instance_uuid(
self._context, self.uuid)
else:
db_vcpu_model = jsonutils.loads(db_vcpu_model)
self.vcpu_model = objects.VirtCPUModel.obj_from_primitive(
db_vcpu_model)
def _load_ec2_ids(self):
self.ec2_ids = objects.EC2Ids.get_by_instance(self._context, self)
def _load_security_groups(self):
self.security_groups = objects.SecurityGroupList.get_by_instance(
self._context, self)
def _load_pci_devices(self):
self.pci_devices = objects.PciDeviceList.get_by_instance_uuid(
self._context, self.uuid)
def _load_migration_context(self, db_context=_NO_DATA_SENTINEL):
if db_context is _NO_DATA_SENTINEL:
try:
self.migration_context = (
objects.MigrationContext.get_by_instance_uuid(
self._context, self.uuid))
except exception.MigrationContextNotFound:
self.migration_context = None
elif db_context is None:
self.migration_context = None
else:
self.migration_context = objects.MigrationContext.obj_from_db_obj(
db_context)
def _load_keypairs(self, db_keypairs=_NO_DATA_SENTINEL):
if db_keypairs is _NO_DATA_SENTINEL:
inst = objects.Instance.get_by_uuid(self._context, self.uuid,
expected_attrs=['keypairs'])
if 'keypairs' in inst:
self.keypairs = inst.keypairs
self.keypairs.obj_reset_changes(recursive=True)
self.obj_reset_changes(['keypairs'])
return
# NOTE(danms): We need to load from the old location by name
# if we don't have them in extra. Only do this from the main
# database as instances were created with keypairs in extra
# before keypairs were moved to the api database.
self.keypairs = objects.KeyPairList(objects=[])
try:
key = objects.KeyPair.get_by_name(self._context,
self.user_id,
self.key_name,
localonly=True)
self.keypairs.objects.append(key)
except exception.KeypairNotFound:
pass
# NOTE(danms): If we loaded from legacy, we leave the keypairs
# attribute dirty in hopes someone else will save it for us
elif db_keypairs:
self.keypairs = objects.KeyPairList.obj_from_primitive(
jsonutils.loads(db_keypairs))
self.obj_reset_changes(['keypairs'])
def _load_tags(self):
self.tags = objects.TagList.get_by_resource_id(
self._context, self.uuid)
def apply_migration_context(self):
if self.migration_context:
self._set_migration_context_to_instance(prefix='new_')
else:
LOG.debug("Trying to apply a migration context that does not "
"seem to be set for this instance", instance=self)
def revert_migration_context(self):
if self.migration_context:
self._set_migration_context_to_instance(prefix='old_')
else:
LOG.debug("Trying to revert a migration context that does not "
"seem to be set for this instance", instance=self)
def _set_migration_context_to_instance(self, prefix):
for inst_attr_name in _MIGRATION_CONTEXT_ATTRS:
setattr(self, inst_attr_name, None)
attr_name = prefix + inst_attr_name
if attr_name in self.migration_context:
attr_value = getattr(
self.migration_context, attr_name)
setattr(self, inst_attr_name, attr_value)
@contextlib.contextmanager
def mutated_migration_context(self):
"""Context manager to temporarily apply the migration context.
Calling .save() from within the context manager means that the mutated
context will be saved which can cause incorrect resource tracking, and
should be avoided.
"""
current_values = {}