def test_get_host_availability_zone(self):
"""Test get right availability zone by given host."""
self.assertEquals(self.default_az, az.get_host_availability_zone(self.context, self.host))
service = self._create_service_with_topic("compute", self.host)
self._add_to_aggregate(service, self.agg)
self.assertEquals(self.availability_zone, az.get_host_availability_zone(self.context, self.host))
def test_get_host_availability_zone(self):
"""Test get right availability zone by given host."""
self.assertEquals(self.default_az,
az.get_host_availability_zone(self.context, self.host))
service = self._create_service_with_topic('compute', self.host)
self._add_to_aggregate(service, self.agg)
self.assertEquals(self.availability_zone,
az.get_host_availability_zone(self.context, self.host))
def test_delete_host_availability_zone(self):
"""Test availability zone could be deleted successfully."""
service = self._create_service_with_topic("compute", self.host)
# Create a new aggregate with an AZ and add the host to the AZ
az_name = "az1"
agg_az1 = self._create_az("agg-az1", az_name)
self._add_to_aggregate(service, agg_az1)
self.assertEquals(az_name, az.get_host_availability_zone(self.context, self.host))
# Delete the AZ via deleting the aggregate
self._delete_from_aggregate(service, agg_az1)
self.assertEquals(self.default_az, az.get_host_availability_zone(self.context, self.host))
def test_update_host_availability_zone(self):
"""Test availability zone could be update by given host."""
service = self._create_service_with_topic("compute", self.host)
# Create a new aggregate with an AZ and add the host to the AZ
az_name = "az1"
agg_az1 = self._create_az("agg-az1", az_name)
self._add_to_aggregate(service, agg_az1)
self.assertEquals(az_name, az.get_host_availability_zone(self.context, self.host))
# Update AZ
new_az_name = "az2"
self._update_az(agg_az1, new_az_name)
self.assertEquals(new_az_name, az.get_host_availability_zone(self.context, self.host))
def test_delete_host_availability_zone(self):
"""Test availability zone could be deleted successfully."""
service = self._create_service_with_topic('compute', self.host)
# Create a new aggregate with an AZ and add the host to the AZ
az_name = 'az1'
agg_az1 = self._create_az('agg-az1', az_name)
self._add_to_aggregate(service, agg_az1)
self.assertEquals(az_name,
az.get_host_availability_zone(self.context, self.host))
# Delete the AZ via deleting the aggregate
self._delete_from_aggregate(service, agg_az1)
self.assertEquals(self.default_az,
az.get_host_availability_zone(self.context, self.host))
def test_update_host_availability_zone(self):
"""Test availability zone could be update by given host."""
service = self._create_service_with_topic('compute', self.host)
# Create a new aggregate with an AZ and add the host to the AZ
az_name = 'az1'
agg_az1 = self._create_az('agg-az1', az_name)
self._add_to_aggregate(service, agg_az1)
self.assertEquals(az_name,
az.get_host_availability_zone(self.context, self.host))
# Update AZ
new_az_name = 'az2'
self._update_az(agg_az1, new_az_name)
self.assertEquals(new_az_name,
az.get_host_availability_zone(self.context, self.host))
def _execute(self):
self.quotas = objects.Quotas.from_reservations(self.context,
self.reservations,
instance=self.instance)
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, legacy_spec,
legacy_props)
scheduler_utils.populate_retry(legacy_props,
self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec and
self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
hosts = self.scheduler_client.select_destinations(
self.context, self.request_spec)
host_state = hosts[0]
scheduler_utils.populate_filter_properties(legacy_props,
host_state)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (host_state['host'], host_state['nodename'])
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
self.compute_rpcapi.prep_resize(
self.context, self.instance, legacy_spec['image'],
self.flavor, host, self.reservations,
request_spec=legacy_spec, filter_properties=legacy_props,
node=node, clean_shutdown=self.clean_shutdown)
def _list_cobalt_hosts(self, context, availability_zone=None):
""" Returns a list of all the hosts known to openstack running the cobalt service. """
admin_context = context.elevated()
services = self.db.service_get_all_by_topic(admin_context,
CONF.cobalt_topic)
if availability_zone is not None and ':' in availability_zone:
parts = availability_zone.split(':')
if len(parts) > 2:
raise exception.NovaException(_('Invalid availability zone'))
az = parts[0]
host = parts[1]
if (az, host) in [(srv['availability_zone'], srv['host'])
for srv in services]:
return [host]
else:
return []
hosts = []
for srv in services:
in_availability_zone = availability_zone is None or \
availability_zone == \
availability_zones.get_host_availability_zone(context,srv['host'])
if srv['host'] not in hosts and in_availability_zone:
hosts.append(srv['host'])
return hosts
def _list_cobalt_hosts(self, context, availability_zone=None):
""" Returns a list of all the hosts known to openstack running the cobalt service. """
admin_context = context.elevated()
services = self.db.service_get_all_by_topic(admin_context, CONF.cobalt_topic)
if availability_zone is not None and ':' in availability_zone:
parts = availability_zone.split(':')
if len(parts) > 2:
raise exception.NovaException(_('Invalid availability zone'))
az = parts[0]
host = parts[1]
if (az, host) in [(srv['availability_zone'], srv['host']) for srv in services]:
return [host]
else:
return []
hosts = []
for srv in services:
in_availability_zone = availability_zone is None or \
availability_zone == \
availability_zones.get_host_availability_zone(context,srv['host'])
if srv['host'] not in hosts and in_availability_zone:
hosts.append(srv['host'])
return hosts
def _execute(self):
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
scheduler_utils.populate_retry(legacy_props,
self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec and
self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
migration = self._preallocate_migration()
hosts = self.scheduler_client.select_destinations(
self.context, self.request_spec, [self.instance.uuid])
host_state = hosts[0]
scheduler_utils.populate_filter_properties(legacy_props,
host_state)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (host_state['host'], host_state['nodename'])
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(
self.context, self.instance, legacy_spec['image'],
self.flavor, host, migration, self.reservations,
request_spec=legacy_spec, filter_properties=legacy_props,
node=node, clean_shutdown=self.clean_shutdown)
def _get_host_az(self, context, instance):
host = str(instance.get('host'))
if not host:
return None
cache_key = "azcache-%s" % host
az = self.mc.get(cache_key)
if not az:
elevated = context.elevated()
az = availability_zones.get_host_availability_zone(elevated, host)
self.mc.set(cache_key, az, AZ_CACHE_SECONDS)
return az
def _prep_resize_at_dest(self, target_cell_migration):
"""Executes PrepResizeAtDestTask and updates the source migration.
:param target_cell_migration: Migration record from the target cell DB
:returns: Refreshed Migration record from the target cell DB after the
resize_claim on the destination host has updated the record.
"""
# TODO(mriedem): Check alternates if the primary selected host fails;
# note that alternates are always in the same cell as the selected host
# so if the primary fails pre-checks, the alternates may also fail. We
# could reschedule but the scheduler does not yet have an ignore_cells
# capability like ignore_hosts.
# We set the target cell instance new_flavor attribute now since the
# ResourceTracker.resize_claim on the destination host uses it.
self._target_cell_instance.new_flavor = self.flavor
verify_task = PrepResizeAtDestTask(
self._target_cell_context, self._target_cell_instance, self.flavor,
target_cell_migration, self.request_spec, self.compute_rpcapi,
self.host_selection, self.network_api, self.volume_api)
target_cell_migration_context = verify_task.execute()
self._completed_tasks['PrepResizeAtDestTask'] = verify_task
# Stash the old vm_state so we can set the resized/reverted instance
# back to the same state later, i.e. if STOPPED do not power on the
# guest.
self._target_cell_instance.system_metadata['old_vm_state'] = (
self._target_cell_instance.vm_state)
# Update the target cell instance availability zone now that we have
# prepared the resize on the destination host. We do this in conductor
# to avoid the "up-call" from the compute service to the API database.
self._target_cell_instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, self.host_selection.service_host))
self._target_cell_instance.save()
# We need to mirror the MigrationContext, created in the target cell
# database, into the source cell database. Keep in mind that the
# MigrationContext has pci_devices and a migration_id in it which
# are specific to the target cell database. The only one we care about
# correcting for the source cell database is migration_id since that
# is used to route neutron external events to the source and target
# hosts.
self.instance.migration_context = (
target_cell_migration_context.obj_clone())
self.instance.migration_context.migration_id = self.source_migration.id
self.instance.save()
return self._update_migration_from_dest_after_claim(
target_cell_migration)
def host_passes(self, host_state, spec_obj):
# Only invoke the filter if 'anti-affinity' and scheduler
# hint anti_affinity_policy = availability_zone is configured
instance_group = spec_obj.instance_group
policy = instance_group.policy if instance_group else None
az_hint = spec_obj.get_scheduler_hint('anti_affinity_policy', None)
# if the policy is not anti-affinity and anti_affinity_policy scheduler
# hint is not availability_zone then return true and don't apply filter
if self.policy_name != policy or az_hint != 'availability_zone':
return True
# Move operations like resize can check the same source compute node
# where the instance is. That case, AntiAffinityAvailabilityZoneFilter
# must not return the source as a non-possible destination.
if spec_obj.instance_uuid in host_state.instances.keys():
return True
# list of hosts of non-deleted instances in the server group
hosts_group_members = (spec_obj.instance_group.hosts
if spec_obj.instance_group else [])
# set of availability zones of the instances in the server group
instance_group_availability_zones = set()
host_availability_zone = availability_zones.get_host_availability_zone(
context.get_admin_context(), host_state.host)
for host in hosts_group_members:
instance_group_availability_zones.add(
availability_zones.get_host_availability_zone(
context.get_admin_context(), host))
# Very old request specs don't have a full InstanceGroup with the UUID
group_uuid = (instance_group.uuid if instance_group
and 'uuid' in instance_group else 'n/a')
LOG.debug(
"Anti-affinity-AZ-filter: check if the host %(host)s in AZ "
"%(host_az)s is not in the same set of AZs in server group "
"%(group_uuid)s", {
'host': host_state.host,
'host_az': host_availability_zone,
'group_uuid': group_uuid
})
return host_availability_zone not in instance_group_availability_zones
def _get_networks_for_instance(self, context, instance_id, project_id,
requested_networks=None):
supercls = super(manager.FlatDHCPManager, self)
networks = supercls._get_networks_for_instance(context,
instance_id,
project_id,
requested_networks)
instance = db.instance_get_by_uuid(context.elevated(),
instance_id)
host = str(instance.get('host'))
# NOTE(SlickNik): expects label to be set to the name of the
# availability zone.
return [network for network in networks if network['label'] ==
availability_zones.get_host_availability_zone(context, host)]
def host_passes(self, host_state, filter_properties):
spec = filter_properties.get('request_spec', {})
props = spec.get('instance_properties', {})
host = props.get('host')
if host:
context = filter_properties['context'].elevated()
az = availability_zones.get_host_availability_zone(context, host)
metadata = db.aggregate_metadata_get_by_host(
context, host_state.host, key='availability_zone')
if 'availability_zone' in metadata:
return az in metadata['availability_zone']
else:
return az == CONF.default_availability_zone
return True
def _execute(self):
self.quotas = objects.Quotas.from_reservations(self.context,
self.reservations,
instance=self.instance)
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, legacy_spec,
legacy_props)
scheduler_utils.populate_retry(legacy_props, self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
hosts = self.scheduler_client.select_destinations(
self.context, self.request_spec)
host_state = hosts[0]
scheduler_utils.populate_filter_properties(legacy_props, host_state)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (host_state['host'], host_state['nodename'])
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
self.compute_rpcapi.prep_resize(self.context,
self.instance,
legacy_spec['image'],
self.flavor,
host,
self.reservations,
request_spec=legacy_spec,
filter_properties=legacy_props,
node=node,
clean_shutdown=self.clean_shutdown)
def get_item_by_host(self, context, host):
return availability_zones.get_host_availability_zone(
ctxt.get_admin_context(), host)
def _execute(self):
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec and
self.request_spec.requested_destination and
'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props,
self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec and
self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
# NOTE(takashin): In the case that the target host is specified,
# if the migration is failed, it is not necessary to retry
# the cold migration to the same host. So make sure that
# reschedule will not occur.
if 'host' in self.request_spec.requested_destination:
legacy_props.pop('retry', None)
self.request_spec.retry = None
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
# Once _preallocate_migration() is done, the source node allocation is
# moved from the instance consumer to the migration record consumer,
# and the instance consumer doesn't have any allocations. If this is
# the first time through here (not a reschedule), select_destinations
# below will allocate resources on the selected destination node for
# the instance consumer. If we're rescheduling, host_list is not None
# and we'll call claim_resources for the instance and the selected
# alternate. If we exhaust our alternates and raise MaxRetriesExceeded,
# the rollback() method should revert the allocation swaparoo and move
# the source node allocation from the migration record back to the
# instance record.
migration = self._preallocate_migration()
self.request_spec.ensure_project_and_user_id(self.instance)
# On an initial call to migrate, 'self.host_list' will be None, so we
# have to call the scheduler to get a list of acceptable hosts to
# migrate to. That list will consist of a selected host, along with
# zero or more alternates. On a reschedule, though, the alternates will
# be passed to this object and stored in 'self.host_list', so we can
# pop the first alternate from the list to use for the destination, and
# pass the remaining alternates to the compute.
if self.host_list is None:
selection_lists = self.scheduler_client.select_destinations(
self.context, self.request_spec, [self.instance.uuid],
return_objects=True, return_alternates=True)
# Since there is only ever one instance to migrate per call, we
# just need the first returned element.
selection_list = selection_lists[0]
# The selected host is the first item in the list, with the
# alternates being the remainder of the list.
selection, self.host_list = selection_list[0], selection_list[1:]
else:
# This is a reschedule that will use the supplied alternate hosts
# in the host_list as destinations. Since the resources on these
# alternates may have been consumed and might not be able to
# support the migrated instance, we need to first claim the
# resources to verify the host still has sufficient availabile
# resources.
elevated = self.context.elevated()
host_available = False
while self.host_list and not host_available:
selection = self.host_list.pop(0)
if selection.allocation_request:
alloc_req = jsonutils.loads(selection.allocation_request)
else:
alloc_req = None
if alloc_req:
# If this call succeeds, the resources on the destination
# host will be claimed by the instance.
host_available = scheduler_utils.claim_resources(
elevated, self.reportclient, self.request_spec,
self.instance.uuid, alloc_req,
selection.allocation_request_version)
else:
# Some deployments use different schedulers that do not
# use Placement, so they will not have an
# allocation_request to claim with. For those cases,
# there is no concept of claiming, so just assume that
# the host is valid.
host_available = True
# There are no more available hosts. Raise a MaxRetriesExceeded
# exception in that case.
if not host_available:
reason = ("Exhausted all hosts available for retrying build "
"failures for instance %(instance_uuid)s." %
{"instance_uuid": self.instance.uuid})
raise exception.MaxRetriesExceeded(reason=reason)
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
LOG.debug("Calling prep_resize with selected host: %s; "
"Selected node: %s; Alternates: %s", host, node,
self.host_list, instance=self.instance)
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(
self.context, self.instance, legacy_spec['image'],
self.flavor, host, migration,
request_spec=legacy_spec, filter_properties=legacy_props,
node=node, clean_shutdown=self.clean_shutdown,
host_list=self.host_list)
def _execute(self):
# NOTE(sbauza): Force_hosts/nodes needs to be reset if we want to make
# sure that the next destination is not forced to be the original host.
# This needs to be done before the populate_retry call otherwise
# retries will be disabled if the server was created with a forced
# host/node.
self.request_spec.reset_forced_destinations()
# TODO(sbauza): Remove once all the scheduler.utils methods accept a
# RequestSpec object in the signature.
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec and
self.request_spec.requested_destination and
'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props,
self.instance.uuid)
port_res_req = self.network_api.get_requested_resource_for_instance(
self.context, self.instance.uuid)
# NOTE(gibi): When cyborg or other module wants to handle similar
# non-nova resources then here we have to collect all the external
# resource requests in a single list and add them to the RequestSpec.
self.request_spec.requested_resources = port_res_req
self._restrict_request_spec_to_cell(legacy_props)
# Once _preallocate_migration() is done, the source node allocation is
# moved from the instance consumer to the migration record consumer,
# and the instance consumer doesn't have any allocations. If this is
# the first time through here (not a reschedule), select_destinations
# below will allocate resources on the selected destination node for
# the instance consumer. If we're rescheduling, host_list is not None
# and we'll call claim_resources for the instance and the selected
# alternate. If we exhaust our alternates and raise MaxRetriesExceeded,
# the rollback() method should revert the allocation swaparoo and move
# the source node allocation from the migration record back to the
# instance record.
migration = self._preallocate_migration()
self.request_spec.ensure_project_and_user_id(self.instance)
self.request_spec.ensure_network_metadata(self.instance)
compute_utils.heal_reqspec_is_bfv(
self.context, self.request_spec, self.instance)
# On an initial call to migrate, 'self.host_list' will be None, so we
# have to call the scheduler to get a list of acceptable hosts to
# migrate to. That list will consist of a selected host, along with
# zero or more alternates. On a reschedule, though, the alternates will
# be passed to this object and stored in 'self.host_list', so we can
# pop the first alternate from the list to use for the destination, and
# pass the remaining alternates to the compute.
if self.host_list is None:
selection = self._schedule()
else:
# This is a reschedule that will use the supplied alternate hosts
# in the host_list as destinations.
selection = self._reschedule()
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
# The availability_zone field was added in v1.1 of the Selection
# object so make sure to handle the case where it is missing.
if 'availability_zone' in selection:
self.instance.availability_zone = selection.availability_zone
else:
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, host))
LOG.debug("Calling prep_resize with selected host: %s; "
"Selected node: %s; Alternates: %s", host, node,
self.host_list, instance=self.instance)
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(
# NOTE(mriedem): Using request_spec.image here is potentially
# dangerous if it is not kept up to date (i.e. rebuild/unshelve);
# seems like the sane thing to do would be to pass the current
# instance.image_meta since that is what MoveClaim will use for
# any NUMA topology claims on the destination host...
self.context, self.instance, self.request_spec.image,
self.flavor, host, migration,
request_spec=self.request_spec, filter_properties=legacy_props,
node=node, clean_shutdown=self.clean_shutdown,
host_list=self.host_list)
def get_availability_zone_by_host(services, host, conductor_api=None):
if len(services) > 0:
return availability_zones.get_host_availability_zone(
context.get_admin_context(), host, conductor_api)
return 'unknown zone'
def _get_host_az(self, context, instance):
admin_context = context.elevated()
if instance['host']:
return availability_zones.get_host_availability_zone(
admin_context, instance['host'])
def _execute(self):
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# WRS: add hosts to Server group host list for group members
# that are migrating in progress
if 'group_members' in legacy_props:
metadetails = self.request_spec.instance_group['metadetails']
is_best_effort = strutils.bool_from_string(
metadetails.get('wrs-sg:best_effort', 'False'))
if ('anti-affinity' in self.request_spec.instance_group['policies']
and not is_best_effort):
group_members = self.request_spec.instance_group['members']
for instance_uuid in group_members:
filters = {
'migration_type':
'migration',
'instance_uuid':
instance_uuid,
'status': [
'queued', 'pre-migrating', 'migrating',
'post-migrating', 'finished'
]
}
migrations = objects.MigrationList.get_by_filters(
self.context, filters)
for migration in migrations:
if migration['source_compute'] not in \
self.request_spec.instance_group['hosts']:
self.request_spec.instance_group['hosts'].append(
migration['source_compute'])
if (migration['dest_compute'] and
(migration['dest_compute'] not in
self.request_spec.instance_group['hosts'])):
self.request_spec.instance_group['hosts'].append(
migration['dest_compute'])
# refresh legacy_spec and legacy_props with latest request_spec
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.\
request_spec.to_legacy_filter_properties_dict()
scheduler_utils.populate_retry(legacy_props, self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec
and self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
self.request_spec.ensure_project_id(self.instance)
# WRS: determine offline cpus due to scaling to be used to calculate
# placement service resource claim in scheduler
self.request_spec.offline_cpus = \
scheduler_utils.determine_offline_cpus(
self.flavor, self.instance.numa_topology)
# NOTE(danms): We don't pass enough information to the scheduler to
# know that we have a boot-from-volume request.
# TODO(danms): We need to pass more context to the scheduler here
# in order to (a) handle boot-from-volume instances, as well as
# (b) know which volume provider to request resource from.
request_spec_copy = self.request_spec
if self.instance.is_volume_backed():
LOG.debug('Requesting zero root disk for '
'boot-from-volume instance')
# Clone this so we don't mutate the RequestSpec that was passed in
request_spec_copy = self.request_spec.obj_clone()
request_spec_copy.flavor.root_gb = 0
hosts = self.scheduler_client.select_destinations(
self.context, request_spec_copy, [self.instance.uuid])
host_state = hosts[0]
scheduler_utils.populate_filter_properties(legacy_props, host_state)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (host_state['host'], host_state['nodename'])
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
self.compute_rpcapi.prep_resize(self.context,
self.instance,
legacy_spec['image'],
self.flavor,
host,
self.reservations,
request_spec=legacy_spec,
filter_properties=legacy_props,
node=node,
clean_shutdown=self.clean_shutdown)
# WRS: return request_spec for save to db but need to clear retry and
# instance_group hosts so that next request starts cleanly
self.request_spec.retry = None
if self.request_spec.instance_group:
self.request_spec.instance_group.hosts = []
return self.request_spec
def get_availability_zone_by_host(host, conductor_api=None):
return availability_zones.get_host_availability_zone(
context.get_admin_context(), host, conductor_api)
def get_availability_zone_by_host(services, host):
if len(services) > 0:
return availability_zones.get_host_availability_zone(context, host)
return 'unknown zone'
def _execute(self):
self._check_instance_is_active()
self._check_instance_has_no_numa()
self._check_host_is_up(self.source)
self._source_cn, self._held_allocations = (
# NOTE(danms): This may raise various exceptions, which will
# propagate to the API and cause a 500. This is what we
# want, as it would indicate internal data structure corruption
# (such as missing migrations, compute nodes, etc).
migrate.replace_allocation_with_migration(self.context,
self.instance,
self.migration))
if not self.destination:
# Either no host was specified in the API request and the user
# wants the scheduler to pick a destination host, or a host was
# specified but is not forcing it, so they want the scheduler
# filters to run on the specified host, like a scheduler hint.
self.destination, dest_node, self.limits = self._find_destination()
else:
# This is the case that the user specified the 'force' flag when
# live migrating with a specific destination host so the scheduler
# is bypassed. There are still some minimal checks performed here
# though.
source_node, dest_node = self._check_requested_destination()
# Now that we're semi-confident in the force specified host, we
# need to copy the source compute node allocations in Placement
# to the destination compute node. Normally select_destinations()
# in the scheduler would do this for us, but when forcing the
# target host we don't call the scheduler.
# TODO(mriedem): Call select_destinations() with a
# skip_filters=True flag so the scheduler does the work of claiming
# resources on the destination in Placement but still bypass the
# scheduler filters, which honors the 'force' flag in the API.
# This raises NoValidHost which will be handled in
# ComputeTaskManager.
# NOTE(gibi): consumer_generation = None as we expect that the
# source host allocation is held by the migration therefore the
# instance is a new, empty consumer for the dest allocation. If
# this assumption fails then placement will return consumer
# generation conflict and this call raise a AllocationUpdateFailed
# exception. We let that propagate here to abort the migration.
scheduler_utils.claim_resources_on_destination(
self.context,
self.report_client,
self.instance,
source_node,
dest_node,
source_allocations=self._held_allocations,
consumer_generation=None)
# dest_node is a ComputeNode object, so we need to get the actual
# node name off it to set in the Migration object below.
dest_node = dest_node.hypervisor_hostname
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, self.destination))
self.migration.source_node = self.instance.node
self.migration.dest_node = dest_node
self.migration.dest_compute = self.destination
self.migration.save()
# TODO(johngarbutt) need to move complexity out of compute manager
# TODO(johngarbutt) disk_over_commit?
return self.compute_rpcapi.live_migration(
self.context,
host=self.source,
instance=self.instance,
dest=self.destination,
block_migration=self.block_migration,
migration=self.migration,
migrate_data=self.migrate_data)
def _execute(self):
self._check_instance_is_active()
self._check_instance_has_no_numa()
self._check_host_is_up(self.source)
self._source_cn, self._held_allocations = (
# NOTE(danms): This may raise various exceptions, which will
# propagate to the API and cause a 500. This is what we
# want, as it would indicate internal data structure corruption
# (such as missing migrations, compute nodes, etc).
migrate.replace_allocation_with_migration(self.context,
self.instance,
self.migration))
if not self.destination:
# Either no host was specified in the API request and the user
# wants the scheduler to pick a destination host, or a host was
# specified but is not forcing it, so they want the scheduler
# filters to run on the specified host, like a scheduler hint.
self.destination, dest_node = self._find_destination()
else:
# This is the case that the user specified the 'force' flag when
# live migrating with a specific destination host so the scheduler
# is bypassed. There are still some minimal checks performed here
# though.
source_node, dest_node = self._check_requested_destination()
# Now that we're semi-confident in the force specified host, we
# need to copy the source compute node allocations in Placement
# to the destination compute node. Normally select_destinations()
# in the scheduler would do this for us, but when forcing the
# target host we don't call the scheduler.
# TODO(mriedem): Call select_destinations() with a
# skip_filters=True flag so the scheduler does the work of claiming
# resources on the destination in Placement but still bypass the
# scheduler filters, which honors the 'force' flag in the API.
# This raises NoValidHost which will be handled in
# ComputeTaskManager.
# NOTE(gibi): consumer_generation = None as we expect that the
# source host allocation is held by the migration therefore the
# instance is a new, empty consumer for the dest allocation. If
# this assumption fails then placement will return consumer
# generation conflict and this call raise a AllocationUpdateFailed
# exception. We let that propagate here to abort the migration.
scheduler_utils.claim_resources_on_destination(
self.context, self.report_client,
self.instance, source_node, dest_node,
source_allocations=self._held_allocations,
consumer_generation=None)
# dest_node is a ComputeNode object, so we need to get the actual
# node name off it to set in the Migration object below.
dest_node = dest_node.hypervisor_hostname
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, self.destination))
self.migration.source_node = self.instance.node
self.migration.dest_node = dest_node
self.migration.dest_compute = self.destination
self.migration.save()
# TODO(johngarbutt) need to move complexity out of compute manager
# TODO(johngarbutt) disk_over_commit?
return self.compute_rpcapi.live_migration(self.context,
host=self.source,
instance=self.instance,
dest=self.destination,
block_migration=self.block_migration,
migration=self.migration,
migrate_data=self.migrate_data)
def get_availability_zone_by_host(services, host):
if len(services) > 0:
return availability_zones.get_host_availability_zone(
context.get_admin_context(), host)
return 'unknown zone'
def _execute(self):
# TODO(sbauza): Remove once all the scheduler.utils methods accept a
# RequestSpec object in the signature.
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec
and self.request_spec.requested_destination
and 'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props, self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# TODO(gibi): We need to make sure that the requested_resources field
# is re calculated based on neutron ports.
self._restrict_request_spec_to_cell(legacy_props)
# Once _preallocate_migration() is done, the source node allocation is
# moved from the instance consumer to the migration record consumer,
# and the instance consumer doesn't have any allocations. If this is
# the first time through here (not a reschedule), select_destinations
# below will allocate resources on the selected destination node for
# the instance consumer. If we're rescheduling, host_list is not None
# and we'll call claim_resources for the instance and the selected
# alternate. If we exhaust our alternates and raise MaxRetriesExceeded,
# the rollback() method should revert the allocation swaparoo and move
# the source node allocation from the migration record back to the
# instance record.
migration = self._preallocate_migration()
self.request_spec.ensure_project_and_user_id(self.instance)
self.request_spec.ensure_network_metadata(self.instance)
compute_utils.heal_reqspec_is_bfv(self.context, self.request_spec,
self.instance)
# On an initial call to migrate, 'self.host_list' will be None, so we
# have to call the scheduler to get a list of acceptable hosts to
# migrate to. That list will consist of a selected host, along with
# zero or more alternates. On a reschedule, though, the alternates will
# be passed to this object and stored in 'self.host_list', so we can
# pop the first alternate from the list to use for the destination, and
# pass the remaining alternates to the compute.
if self.host_list is None:
selection_lists = self.query_client.select_destinations(
self.context,
self.request_spec, [self.instance.uuid],
return_objects=True,
return_alternates=True)
# Since there is only ever one instance to migrate per call, we
# just need the first returned element.
selection_list = selection_lists[0]
# The selected host is the first item in the list, with the
# alternates being the remainder of the list.
selection, self.host_list = selection_list[0], selection_list[1:]
else:
# This is a reschedule that will use the supplied alternate hosts
# in the host_list as destinations. Since the resources on these
# alternates may have been consumed and might not be able to
# support the migrated instance, we need to first claim the
# resources to verify the host still has sufficient availabile
# resources.
elevated = self.context.elevated()
host_available = False
while self.host_list and not host_available:
selection = self.host_list.pop(0)
if selection.allocation_request:
alloc_req = jsonutils.loads(selection.allocation_request)
else:
alloc_req = None
if alloc_req:
# If this call succeeds, the resources on the destination
# host will be claimed by the instance.
host_available = scheduler_utils.claim_resources(
elevated, self.reportclient, self.request_spec,
self.instance.uuid, alloc_req,
selection.allocation_request_version)
else:
# Some deployments use different schedulers that do not
# use Placement, so they will not have an
# allocation_request to claim with. For those cases,
# there is no concept of claiming, so just assume that
# the host is valid.
host_available = True
# There are no more available hosts. Raise a MaxRetriesExceeded
# exception in that case.
if not host_available:
reason = ("Exhausted all hosts available for retrying build "
"failures for instance %(instance_uuid)s." % {
"instance_uuid": self.instance.uuid
})
raise exception.MaxRetriesExceeded(reason=reason)
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(self.context, host))
LOG.debug(
"Calling prep_resize with selected host: %s; "
"Selected node: %s; Alternates: %s",
host,
node,
self.host_list,
instance=self.instance)
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(
# NOTE(mriedem): Using request_spec.image here is potentially
# dangerous if it is not kept up to date (i.e. rebuild/unshelve);
# seems like the sane thing to do would be to pass the current
# instance.image_meta since that is what MoveClaim will use for
# any NUMA topology claims on the destination host...
self.context,
self.instance,
self.request_spec.image,
self.flavor,
host,
migration,
request_spec=self.request_spec,
filter_properties=legacy_props,
node=node,
clean_shutdown=self.clean_shutdown,
host_list=self.host_list)
def _execute(self):
# TODO(sbauza): Remove once all the scheduler.utils methods accept a
# RequestSpec object in the signature.
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec and
self.request_spec.requested_destination and
'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props,
self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# TODO(gibi): We need to make sure that the requested_resources field
# is re calculated based on neutron ports.
self._restrict_request_spec_to_cell(legacy_props)
# Once _preallocate_migration() is done, the source node allocation is
# moved from the instance consumer to the migration record consumer,
# and the instance consumer doesn't have any allocations. If this is
# the first time through here (not a reschedule), select_destinations
# below will allocate resources on the selected destination node for
# the instance consumer. If we're rescheduling, host_list is not None
# and we'll call claim_resources for the instance and the selected
# alternate. If we exhaust our alternates and raise MaxRetriesExceeded,
# the rollback() method should revert the allocation swaparoo and move
# the source node allocation from the migration record back to the
# instance record.
migration = self._preallocate_migration()
self.request_spec.ensure_project_and_user_id(self.instance)
self.request_spec.ensure_network_metadata(self.instance)
compute_utils.heal_reqspec_is_bfv(
self.context, self.request_spec, self.instance)
# On an initial call to migrate, 'self.host_list' will be None, so we
# have to call the scheduler to get a list of acceptable hosts to
# migrate to. That list will consist of a selected host, along with
# zero or more alternates. On a reschedule, though, the alternates will
# be passed to this object and stored in 'self.host_list', so we can
# pop the first alternate from the list to use for the destination, and
# pass the remaining alternates to the compute.
if self.host_list is None:
selection_lists = self.query_client.select_destinations(
self.context, self.request_spec, [self.instance.uuid],
return_objects=True, return_alternates=True)
# Since there is only ever one instance to migrate per call, we
# just need the first returned element.
selection_list = selection_lists[0]
# The selected host is the first item in the list, with the
# alternates being the remainder of the list.
selection, self.host_list = selection_list[0], selection_list[1:]
else:
# This is a reschedule that will use the supplied alternate hosts
# in the host_list as destinations. Since the resources on these
# alternates may have been consumed and might not be able to
# support the migrated instance, we need to first claim the
# resources to verify the host still has sufficient availabile
# resources.
elevated = self.context.elevated()
host_available = False
while self.host_list and not host_available:
selection = self.host_list.pop(0)
if selection.allocation_request:
alloc_req = jsonutils.loads(selection.allocation_request)
else:
alloc_req = None
if alloc_req:
# If this call succeeds, the resources on the destination
# host will be claimed by the instance.
host_available = scheduler_utils.claim_resources(
elevated, self.reportclient, self.request_spec,
self.instance.uuid, alloc_req,
selection.allocation_request_version)
else:
# Some deployments use different schedulers that do not
# use Placement, so they will not have an
# allocation_request to claim with. For those cases,
# there is no concept of claiming, so just assume that
# the host is valid.
host_available = True
# There are no more available hosts. Raise a MaxRetriesExceeded
# exception in that case.
if not host_available:
reason = ("Exhausted all hosts available for retrying build "
"failures for instance %(instance_uuid)s." %
{"instance_uuid": self.instance.uuid})
raise exception.MaxRetriesExceeded(reason=reason)
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(
self.context, host))
LOG.debug("Calling prep_resize with selected host: %s; "
"Selected node: %s; Alternates: %s", host, node,
self.host_list, instance=self.instance)
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(
# NOTE(mriedem): Using request_spec.image here is potentially
# dangerous if it is not kept up to date (i.e. rebuild/unshelve);
# seems like the sane thing to do would be to pass the current
# instance.image_meta since that is what MoveClaim will use for
# any NUMA topology claims on the destination host...
self.context, self.instance, self.request_spec.image,
self.flavor, host, migration,
request_spec=self.request_spec, filter_properties=legacy_props,
node=node, clean_shutdown=self.clean_shutdown,
host_list=self.host_list)
def _execute(self):
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec
and self.request_spec.requested_destination
and 'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props, self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec
and self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
# NOTE(takashin): In the case that the target host is specified,
# if the migration is failed, it is not necessary to retry
# the cold migration to the same host. So make sure that
# reschedule will not occur.
if 'host' in self.request_spec.requested_destination:
legacy_props.pop('retry', None)
self.request_spec.retry = None
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
# Once _preallocate_migration() is done, the source node allocation is
# moved from the instance consumer to the migration record consumer,
# and the instance consumer doesn't have any allocations. If this is
# the first time through here (not a reschedule), select_destinations
# below will allocate resources on the selected destination node for
# the instance consumer. If we're rescheduling, host_list is not None
# and we'll call claim_resources for the instance and the selected
# alternate. If we exhaust our alternates and raise MaxRetriesExceeded,
# the rollback() method should revert the allocation swaparoo and move
# the source node allocation from the migration record back to the
# instance record.
migration = self._preallocate_migration()
self.request_spec.ensure_project_and_user_id(self.instance)
compute_utils.heal_reqspec_is_bfv(self.context, self.request_spec,
self.instance)
# On an initial call to migrate, 'self.host_list' will be None, so we
# have to call the scheduler to get a list of acceptable hosts to
# migrate to. That list will consist of a selected host, along with
# zero or more alternates. On a reschedule, though, the alternates will
# be passed to this object and stored in 'self.host_list', so we can
# pop the first alternate from the list to use for the destination, and
# pass the remaining alternates to the compute.
if self.host_list is None:
selection_lists = self.scheduler_client.select_destinations(
self.context,
self.request_spec, [self.instance.uuid],
return_objects=True,
return_alternates=True)
# Since there is only ever one instance to migrate per call, we
# just need the first returned element.
selection_list = selection_lists[0]
# The selected host is the first item in the list, with the
# alternates being the remainder of the list.
selection, self.host_list = selection_list[0], selection_list[1:]
else:
# This is a reschedule that will use the supplied alternate hosts
# in the host_list as destinations. Since the resources on these
# alternates may have been consumed and might not be able to
# support the migrated instance, we need to first claim the
# resources to verify the host still has sufficient availabile
# resources.
elevated = self.context.elevated()
host_available = False
while self.host_list and not host_available:
selection = self.host_list.pop(0)
if selection.allocation_request:
alloc_req = jsonutils.loads(selection.allocation_request)
else:
alloc_req = None
if alloc_req:
# If this call succeeds, the resources on the destination
# host will be claimed by the instance.
host_available = scheduler_utils.claim_resources(
elevated, self.reportclient, self.request_spec,
self.instance.uuid, alloc_req,
selection.allocation_request_version)
else:
# Some deployments use different schedulers that do not
# use Placement, so they will not have an
# allocation_request to claim with. For those cases,
# there is no concept of claiming, so just assume that
# the host is valid.
host_available = True
# There are no more available hosts. Raise a MaxRetriesExceeded
# exception in that case.
if not host_available:
reason = ("Exhausted all hosts available for retrying build "
"failures for instance %(instance_uuid)s." % {
"instance_uuid": self.instance.uuid
})
raise exception.MaxRetriesExceeded(reason=reason)
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
LOG.debug(
"Calling prep_resize with selected host: %s; "
"Selected node: %s; Alternates: %s",
host,
node,
self.host_list,
instance=self.instance)
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(self.context,
self.instance,
legacy_spec['image'],
self.flavor,
host,
migration,
request_spec=legacy_spec,
filter_properties=legacy_props,
node=node,
clean_shutdown=self.clean_shutdown,
host_list=self.host_list)
def _execute(self):
# TODO(sbauza): Remove that once prep_resize() accepts a RequestSpec
# object in the signature and all the scheduler.utils methods too
legacy_spec = self.request_spec.to_legacy_request_spec_dict()
legacy_props = self.request_spec.to_legacy_filter_properties_dict()
scheduler_utils.setup_instance_group(self.context, self.request_spec)
# If a target host is set in a requested destination,
# 'populate_retry' need not be executed.
if not ('requested_destination' in self.request_spec
and self.request_spec.requested_destination
and 'host' in self.request_spec.requested_destination):
scheduler_utils.populate_retry(legacy_props, self.instance.uuid)
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
self.request_spec.reset_forced_destinations()
# NOTE(danms): Right now we only support migrate to the same
# cell as the current instance, so request that the scheduler
# limit thusly.
instance_mapping = objects.InstanceMapping.get_by_instance_uuid(
self.context, self.instance.uuid)
LOG.debug('Requesting cell %(cell)s while migrating',
{'cell': instance_mapping.cell_mapping.identity},
instance=self.instance)
if ('requested_destination' in self.request_spec
and self.request_spec.requested_destination):
self.request_spec.requested_destination.cell = (
instance_mapping.cell_mapping)
# NOTE(takashin): In the case that the target host is specified,
# if the migration is failed, it is not necessary to retry
# the cold migration to the same host. So make sure that
# reschedule will not occur.
if 'host' in self.request_spec.requested_destination:
legacy_props.pop('retry', None)
self.request_spec.retry = None
else:
self.request_spec.requested_destination = objects.Destination(
cell=instance_mapping.cell_mapping)
migration = self._preallocate_migration()
self.request_spec.ensure_project_id(self.instance)
# For now, don't request alternates. A later patch in the series will
# modify migration to use alternates instead of calling the scheduler
# again.
selection_lists = self.scheduler_client.select_destinations(
self.context,
self.request_spec, [self.instance.uuid],
return_objects=True,
return_alternates=False)
# We only need the first item in the first list, as there is only one
# instance, and we don't care about any alternates.
selection = selection_lists[0][0]
scheduler_utils.populate_filter_properties(legacy_props, selection)
# context is not serializable
legacy_props.pop('context', None)
(host, node) = (selection.service_host, selection.nodename)
self.instance.availability_zone = (
availability_zones.get_host_availability_zone(self.context, host))
# FIXME(sbauza): Serialize/Unserialize the legacy dict because of
# oslo.messaging #1529084 to transform datetime values into strings.
# tl;dr: datetimes in dicts are not accepted as correct values by the
# rpc fake driver.
legacy_spec = jsonutils.loads(jsonutils.dumps(legacy_spec))
# RPC cast to the destination host to start the migration process.
self.compute_rpcapi.prep_resize(self.context,
self.instance,
legacy_spec['image'],
self.flavor,
host,
migration,
self.reservations,
request_spec=legacy_spec,
filter_properties=legacy_props,
node=node,
clean_shutdown=self.clean_shutdown)
def get_availability_zone_by_host(host, conductor_api=None):
return availability_zones.get_host_availability_zone(
context.get_admin_context(), host, conductor_api)
def _get_host_az(self, context, instance):
admin_context = context.elevated()
if instance['host']:
return availability_zones.get_host_availability_zone(
admin_context, instance['host'])
