b6edbce9b3
In the startup of compute node, the first available resource update will fail to add Allocations record. This is due to ResourceProvider will be created at the end of available resource update. This patch ensure the ResourceProvider and Inventory created in the beginning of available resource update. Closes-Bug: #1621437 Change-Id: I91fa7b8354a7613848225429ac9d38c6305b03c6
989 lines
42 KiB
Python
989 lines
42 KiB
Python
# Copyright (c) 2012 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Track resources like memory and disk for a compute host. Provides the
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scheduler with useful information about availability through the ComputeNode
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model.
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"""
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import copy
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from oslo_utils import importutils
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from nova.compute import claims
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from nova.compute import monitors
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from nova.compute import task_states
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from nova.compute import vm_states
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import nova.conf
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from nova import exception
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from nova.i18n import _, _LE, _LI, _LW
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from nova import objects
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from nova.objects import base as obj_base
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from nova.objects import migration as migration_obj
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from nova.pci import manager as pci_manager
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from nova.pci import request as pci_request
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from nova import rpc
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from nova.scheduler import client as scheduler_client
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from nova import utils
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from nova.virt import hardware
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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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COMPUTE_RESOURCE_SEMAPHORE = "compute_resources"
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def _instance_in_resize_state(instance):
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"""Returns True if the instance is in one of the resizing states.
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:param instance: `nova.objects.Instance` object
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"""
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vm = instance.vm_state
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task = instance.task_state
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if vm == vm_states.RESIZED:
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return True
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if (vm in [vm_states.ACTIVE, vm_states.STOPPED]
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and task in [task_states.RESIZE_PREP,
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task_states.RESIZE_MIGRATING, task_states.RESIZE_MIGRATED,
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task_states.RESIZE_FINISH, task_states.REBUILDING]):
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return True
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return False
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def _is_trackable_migration(migration):
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# Only look at resize/migrate migration and evacuation records
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# NOTE(danms): RT should probably examine live migration
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# records as well and do something smart. However, ignore
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# those for now to avoid them being included in below calculations.
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return migration.migration_type in ('resize', 'migration',
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'evacuation')
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class ResourceTracker(object):
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"""Compute helper class for keeping track of resource usage as instances
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are built and destroyed.
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"""
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def __init__(self, host, driver, nodename):
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self.host = host
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self.driver = driver
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self.pci_tracker = None
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self.nodename = nodename
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self.compute_node = None
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self.stats = importutils.import_object(CONF.compute_stats_class)
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self.tracked_instances = {}
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self.tracked_migrations = {}
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monitor_handler = monitors.MonitorHandler(self)
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self.monitors = monitor_handler.monitors
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self.old_resources = objects.ComputeNode()
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self.scheduler_client = scheduler_client.SchedulerClient()
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self.ram_allocation_ratio = CONF.ram_allocation_ratio
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self.cpu_allocation_ratio = CONF.cpu_allocation_ratio
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self.disk_allocation_ratio = CONF.disk_allocation_ratio
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def instance_claim(self, context, instance, limits=None):
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"""Indicate that some resources are needed for an upcoming compute
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instance build operation.
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This should be called before the compute node is about to perform
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an instance build operation that will consume additional resources.
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:param context: security context
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:param instance: instance to reserve resources for.
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:type instance: nova.objects.instance.Instance object
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:param limits: Dict of oversubscription limits for memory, disk,
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and CPUs.
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:returns: A Claim ticket representing the reserved resources. It can
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be used to revert the resource usage if an error occurs
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during the instance build.
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"""
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if self.disabled:
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# compute_driver doesn't support resource tracking, just
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# set the 'host' and node fields and continue the build:
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self._set_instance_host_and_node(instance)
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return claims.NopClaim()
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# sanity checks:
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if instance.host:
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LOG.warning(_LW("Host field should not be set on the instance "
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"until resources have been claimed."),
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instance=instance)
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if instance.node:
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LOG.warning(_LW("Node field should not be set on the instance "
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"until resources have been claimed."),
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instance=instance)
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# get the overhead required to build this instance:
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overhead = self.driver.estimate_instance_overhead(instance)
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LOG.debug("Memory overhead for %(flavor)d MB instance; %(overhead)d "
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"MB", {'flavor': instance.flavor.memory_mb,
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'overhead': overhead['memory_mb']})
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LOG.debug("Disk overhead for %(flavor)d GB instance; %(overhead)d "
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"GB", {'flavor': instance.flavor.root_gb,
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'overhead': overhead.get('disk_gb', 0)})
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pci_requests = objects.InstancePCIRequests.get_by_instance_uuid(
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context, instance.uuid)
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claim = claims.Claim(context, instance, self, self.compute_node,
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pci_requests, overhead=overhead, limits=limits)
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# self._set_instance_host_and_node() will save instance to the DB
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# so set instance.numa_topology first. We need to make sure
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# that numa_topology is saved while under COMPUTE_RESOURCE_SEMAPHORE
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# so that the resource audit knows about any cpus we've pinned.
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instance_numa_topology = claim.claimed_numa_topology
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instance.numa_topology = instance_numa_topology
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self._set_instance_host_and_node(instance)
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if self.pci_tracker:
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# NOTE(jaypipes): ComputeNode.pci_device_pools is set below
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# in _update_usage_from_instance().
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self.pci_tracker.claim_instance(context, pci_requests,
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instance_numa_topology)
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# Mark resources in-use and update stats
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self._update_usage_from_instance(context, instance)
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elevated = context.elevated()
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# persist changes to the compute node:
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self._update(elevated)
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return claim
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def rebuild_claim(self, context, instance, limits=None, image_meta=None,
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migration=None):
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"""Create a claim for a rebuild operation."""
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instance_type = instance.flavor
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return self._move_claim(context, instance, instance_type,
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move_type='evacuation', limits=limits,
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image_meta=image_meta, migration=migration)
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def resize_claim(self, context, instance, instance_type,
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image_meta=None, limits=None):
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"""Create a claim for a resize or cold-migration move."""
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return self._move_claim(context, instance, instance_type,
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image_meta=image_meta, limits=limits)
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def _move_claim(self, context, instance, new_instance_type, move_type=None,
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image_meta=None, limits=None, migration=None):
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"""Indicate that resources are needed for a move to this host.
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Move can be either a migrate/resize, live-migrate or an
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evacuate/rebuild operation.
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:param context: security context
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:param instance: instance object to reserve resources for
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:param new_instance_type: new instance_type being resized to
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:param image_meta: instance image metadata
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:param move_type: move type - can be one of 'migration', 'resize',
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'live-migration', 'evacuate'
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:param limits: Dict of oversubscription limits for memory, disk,
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and CPUs
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:param migration: A migration object if one was already created
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elsewhere for this operation
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:returns: A Claim ticket representing the reserved resources. This
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should be turned into finalize a resource claim or free
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resources after the compute operation is finished.
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"""
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image_meta = image_meta or {}
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if migration:
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self._claim_existing_migration(migration)
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else:
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migration = self._create_migration(context, instance,
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new_instance_type, move_type)
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if self.disabled:
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# compute_driver doesn't support resource tracking, just
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# generate the migration record and continue the resize:
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return claims.NopClaim(migration=migration)
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# get memory overhead required to build this instance:
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overhead = self.driver.estimate_instance_overhead(new_instance_type)
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LOG.debug("Memory overhead for %(flavor)d MB instance; %(overhead)d "
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"MB", {'flavor': new_instance_type.memory_mb,
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'overhead': overhead['memory_mb']})
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LOG.debug("Disk overhead for %(flavor)d GB instance; %(overhead)d "
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"GB", {'flavor': instance.flavor.root_gb,
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'overhead': overhead.get('disk_gb', 0)})
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# TODO(moshele): we are recreating the pci requests even if
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# there was no change on resize. This will cause allocating
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# the old/new pci device in the resize phase. In the future
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# we would like to optimise this.
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new_pci_requests = pci_request.get_pci_requests_from_flavor(
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new_instance_type)
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new_pci_requests.instance_uuid = instance.uuid
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# PCI requests come from two sources: instance flavor and
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# SR-IOV ports. SR-IOV ports pci_request don't have an alias_name.
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# On resize merge the SR-IOV ports pci_requests with the new
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# instance flavor pci_requests.
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if instance.pci_requests:
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for request in instance.pci_requests.requests:
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if request.alias_name is None:
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new_pci_requests.requests.append(request)
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claim = claims.MoveClaim(context, instance, new_instance_type,
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image_meta, self, self.compute_node,
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new_pci_requests, overhead=overhead,
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limits=limits)
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claim.migration = migration
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claimed_pci_devices_objs = []
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if self.pci_tracker:
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# NOTE(jaypipes): ComputeNode.pci_device_pools is set below
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# in _update_usage_from_instance().
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claimed_pci_devices_objs = self.pci_tracker.claim_instance(
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context, new_pci_requests, claim.claimed_numa_topology)
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claimed_pci_devices = objects.PciDeviceList(
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objects=claimed_pci_devices_objs)
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# TODO(jaypipes): Move claimed_numa_topology out of the Claim's
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# constructor flow so the Claim constructor only tests whether
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# resources can be claimed, not consume the resources directly.
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mig_context = objects.MigrationContext(
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context=context, instance_uuid=instance.uuid,
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migration_id=migration.id,
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old_numa_topology=instance.numa_topology,
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new_numa_topology=claim.claimed_numa_topology,
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old_pci_devices=instance.pci_devices,
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new_pci_devices=claimed_pci_devices,
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old_pci_requests=instance.pci_requests,
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new_pci_requests=new_pci_requests)
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instance.migration_context = mig_context
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instance.save()
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# Mark the resources in-use for the resize landing on this
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# compute host:
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self._update_usage_from_migration(context, instance, migration)
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elevated = context.elevated()
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self._update(elevated)
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return claim
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def _create_migration(self, context, instance, new_instance_type,
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move_type=None):
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"""Create a migration record for the upcoming resize. This should
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be done while the COMPUTE_RESOURCES_SEMAPHORE is held so the resource
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claim will not be lost if the audit process starts.
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"""
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migration = objects.Migration(context=context.elevated())
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migration.dest_compute = self.host
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migration.dest_node = self.nodename
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migration.dest_host = self.driver.get_host_ip_addr()
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migration.old_instance_type_id = instance.flavor.id
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migration.new_instance_type_id = new_instance_type.id
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migration.status = 'pre-migrating'
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migration.instance_uuid = instance.uuid
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migration.source_compute = instance.host
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migration.source_node = instance.node
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if move_type:
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migration.migration_type = move_type
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else:
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migration.migration_type = migration_obj.determine_migration_type(
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migration)
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migration.create()
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return migration
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def _claim_existing_migration(self, migration):
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"""Make an existing migration record count for resource tracking.
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If a migration record was created already before the request made
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it to this compute host, only set up the migration so it's included in
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resource tracking. This should be done while the
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COMPUTE_RESOURCES_SEMAPHORE is held.
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"""
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migration.dest_compute = self.host
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migration.dest_node = self.nodename
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migration.dest_host = self.driver.get_host_ip_addr()
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migration.status = 'pre-migrating'
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migration.save()
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def _set_instance_host_and_node(self, instance):
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"""Tag the instance as belonging to this host. This should be done
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while the COMPUTE_RESOURCES_SEMAPHORE is held so the resource claim
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will not be lost if the audit process starts.
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"""
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instance.host = self.host
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instance.launched_on = self.host
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instance.node = self.nodename
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instance.save()
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def _unset_instance_host_and_node(self, instance):
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"""Untag the instance so it no longer belongs to the host.
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This should be done while the COMPUTE_RESOURCES_SEMAPHORE is held so
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the resource claim will not be lost if the audit process starts.
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"""
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instance.host = None
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instance.node = None
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instance.save()
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def abort_instance_claim(self, context, instance):
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"""Remove usage from the given instance."""
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self._update_usage_from_instance(context, instance, is_removed=True)
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instance.clear_numa_topology()
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self._unset_instance_host_and_node(instance)
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self._update(context.elevated())
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def drop_move_claim(self, context, instance, instance_type=None,
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prefix='new_'):
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"""Remove usage for an incoming/outgoing migration."""
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if instance['uuid'] in self.tracked_migrations:
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migration, itype = self.tracked_migrations.pop(instance['uuid'])
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if not instance_type:
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ctxt = context.elevated()
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instance_type = self._get_instance_type(ctxt, instance, prefix,
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migration)
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if instance_type is not None and instance_type.id == itype['id']:
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numa_topology = self._get_migration_context_resource(
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'numa_topology', instance, prefix=prefix)
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usage = self._get_usage_dict(
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itype, numa_topology=numa_topology)
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if self.pci_tracker:
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# free old/new allocated pci devices
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pci_devices = self._get_migration_context_resource(
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'pci_devices', instance, prefix=prefix)
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if pci_devices:
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for pci_device in pci_devices:
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self.pci_tracker.free_device(pci_device, instance)
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self._update_usage(usage, sign=-1)
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ctxt = context.elevated()
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self._update(ctxt)
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instance.drop_migration_context()
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@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
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def update_usage(self, context, instance):
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"""Update the resource usage and stats after a change in an
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instance
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"""
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if self.disabled:
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return
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uuid = instance['uuid']
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# don't update usage for this instance unless it submitted a resource
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# claim first:
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if uuid in self.tracked_instances:
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self._update_usage_from_instance(context, instance)
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self._update(context.elevated())
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@property
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def disabled(self):
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return self.compute_node is None
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def _init_compute_node(self, context, resources):
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"""Initialize the compute node if it does not already exist.
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The resource tracker will be inoperable if compute_node
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is not defined. The compute_node will remain undefined if
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we fail to create it or if there is no associated service
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registered.
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If this method has to create a compute node it needs initial
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values - these come from resources.
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:param context: security context
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:param resources: initial values
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"""
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# if there is already a compute node just use resources
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# to initialize
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if self.compute_node:
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self._copy_resources(resources)
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self._setup_pci_tracker(context, resources)
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self.scheduler_client.update_resource_stats(self.compute_node)
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return
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# now try to get the compute node record from the
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# database. If we get one we use resources to initialize
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self.compute_node = self._get_compute_node(context)
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if self.compute_node:
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self._copy_resources(resources)
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self._setup_pci_tracker(context, resources)
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self.scheduler_client.update_resource_stats(self.compute_node)
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return
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# there was no local copy and none in the database
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# so we need to create a new compute node. This needs
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# to be initialized with resource values.
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self.compute_node = objects.ComputeNode(context)
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self.compute_node.host = self.host
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self._copy_resources(resources)
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self.compute_node.create()
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LOG.info(_LI('Compute_service record created for '
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'%(host)s:%(node)s'),
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{'host': self.host, 'node': self.nodename})
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self._setup_pci_tracker(context, resources)
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self.scheduler_client.update_resource_stats(self.compute_node)
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def _setup_pci_tracker(self, context, resources):
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if not self.pci_tracker:
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n_id = self.compute_node.id if self.compute_node else None
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self.pci_tracker = pci_manager.PciDevTracker(context, node_id=n_id)
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if 'pci_passthrough_devices' in resources:
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dev_json = resources.pop('pci_passthrough_devices')
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self.pci_tracker.update_devices_from_hypervisor_resources(
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dev_json)
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dev_pools_obj = self.pci_tracker.stats.to_device_pools_obj()
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self.compute_node.pci_device_pools = dev_pools_obj
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def _copy_resources(self, resources):
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"""Copy resource values to initialize compute_node and related
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data structures.
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"""
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# purge old stats and init with anything passed in by the driver
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self.stats.clear()
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self.stats.digest_stats(resources.get('stats'))
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self.compute_node.stats = copy.deepcopy(self.stats)
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# update the allocation ratios for the related ComputeNode object
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|
self.compute_node.ram_allocation_ratio = self.ram_allocation_ratio
|
|
self.compute_node.cpu_allocation_ratio = self.cpu_allocation_ratio
|
|
self.compute_node.disk_allocation_ratio = self.disk_allocation_ratio
|
|
|
|
# now copy rest to compute_node
|
|
self.compute_node.update_from_virt_driver(resources)
|
|
|
|
def _get_host_metrics(self, context, nodename):
|
|
"""Get the metrics from monitors and
|
|
notify information to message bus.
|
|
"""
|
|
metrics = objects.MonitorMetricList()
|
|
metrics_info = {}
|
|
for monitor in self.monitors:
|
|
try:
|
|
monitor.populate_metrics(metrics)
|
|
except Exception as exc:
|
|
LOG.warning(_LW("Cannot get the metrics from %(mon)s; "
|
|
"error: %(exc)s"),
|
|
{'mon': monitor, 'exc': exc})
|
|
# TODO(jaypipes): Remove this when compute_node.metrics doesn't need
|
|
# to be populated as a JSONified string.
|
|
metrics = metrics.to_list()
|
|
if len(metrics):
|
|
metrics_info['nodename'] = nodename
|
|
metrics_info['metrics'] = metrics
|
|
metrics_info['host'] = self.host
|
|
metrics_info['host_ip'] = CONF.my_ip
|
|
notifier = rpc.get_notifier(service='compute', host=nodename)
|
|
notifier.info(context, 'compute.metrics.update', metrics_info)
|
|
return metrics
|
|
|
|
def update_available_resource(self, context):
|
|
"""Override in-memory calculations of compute node resource usage based
|
|
on data audited from the hypervisor layer.
|
|
|
|
Add in resource claims in progress to account for operations that have
|
|
declared a need for resources, but not necessarily retrieved them from
|
|
the hypervisor layer yet.
|
|
"""
|
|
LOG.info(_LI("Auditing locally available compute resources for "
|
|
"node %(node)s"),
|
|
{'node': self.nodename})
|
|
resources = self.driver.get_available_resource(self.nodename)
|
|
resources['host_ip'] = CONF.my_ip
|
|
|
|
# We want the 'cpu_info' to be None from the POV of the
|
|
# virt driver, but the DB requires it to be non-null so
|
|
# just force it to empty string
|
|
if "cpu_info" not in resources or resources["cpu_info"] is None:
|
|
resources["cpu_info"] = ''
|
|
|
|
self._verify_resources(resources)
|
|
|
|
self._report_hypervisor_resource_view(resources)
|
|
|
|
self._update_available_resource(context, resources)
|
|
|
|
def _pair_instances_to_migrations(self, migrations, instances):
|
|
instance_by_uuid = {inst.uuid: inst for inst in instances}
|
|
for migration in migrations:
|
|
try:
|
|
migration.instance = instance_by_uuid[migration.instance_uuid]
|
|
except KeyError:
|
|
# NOTE(danms): If this happens, we don't set it here, and
|
|
# let the code either fail or lazy-load the instance later
|
|
# which is what happened before we added this optimization.
|
|
# This _should_ not be possible, of course.
|
|
LOG.error(_LE('Migration for instance %(uuid)s refers to '
|
|
'another host\'s instance!'),
|
|
{'uuid': migration.instance_uuid})
|
|
|
|
@utils.synchronized(COMPUTE_RESOURCE_SEMAPHORE)
|
|
def _update_available_resource(self, context, resources):
|
|
|
|
# initialize the compute node object, creating it
|
|
# if it does not already exist.
|
|
self._init_compute_node(context, resources)
|
|
|
|
# if we could not init the compute node the tracker will be
|
|
# disabled and we should quit now
|
|
if self.disabled:
|
|
return
|
|
|
|
# Grab all instances assigned to this node:
|
|
instances = objects.InstanceList.get_by_host_and_node(
|
|
context, self.host, self.nodename,
|
|
expected_attrs=['system_metadata',
|
|
'numa_topology',
|
|
'flavor', 'migration_context'])
|
|
|
|
# Now calculate usage based on instance utilization:
|
|
self._update_usage_from_instances(context, instances)
|
|
|
|
# Grab all in-progress migrations:
|
|
migrations = objects.MigrationList.get_in_progress_by_host_and_node(
|
|
context, self.host, self.nodename)
|
|
|
|
self._pair_instances_to_migrations(migrations, instances)
|
|
self._update_usage_from_migrations(context, migrations)
|
|
|
|
# Detect and account for orphaned instances that may exist on the
|
|
# hypervisor, but are not in the DB:
|
|
orphans = self._find_orphaned_instances()
|
|
self._update_usage_from_orphans(orphans)
|
|
|
|
# NOTE(yjiang5): Because pci device tracker status is not cleared in
|
|
# this periodic task, and also because the resource tracker is not
|
|
# notified when instances are deleted, we need remove all usages
|
|
# from deleted instances.
|
|
self.pci_tracker.clean_usage(instances, migrations, orphans)
|
|
dev_pools_obj = self.pci_tracker.stats.to_device_pools_obj()
|
|
self.compute_node.pci_device_pools = dev_pools_obj
|
|
|
|
self._report_final_resource_view()
|
|
|
|
metrics = self._get_host_metrics(context, self.nodename)
|
|
# TODO(pmurray): metrics should not be a json string in ComputeNode,
|
|
# but it is. This should be changed in ComputeNode
|
|
self.compute_node.metrics = jsonutils.dumps(metrics)
|
|
|
|
# update the compute_node
|
|
self._update(context)
|
|
LOG.info(_LI('Compute_service record updated for %(host)s:%(node)s'),
|
|
{'host': self.host, 'node': self.nodename})
|
|
|
|
def _get_compute_node(self, context):
|
|
"""Returns compute node for the host and nodename."""
|
|
try:
|
|
return objects.ComputeNode.get_by_host_and_nodename(
|
|
context, self.host, self.nodename)
|
|
except exception.NotFound:
|
|
LOG.warning(_LW("No compute node record for %(host)s:%(node)s"),
|
|
{'host': self.host, 'node': self.nodename})
|
|
|
|
def _report_hypervisor_resource_view(self, resources):
|
|
"""Log the hypervisor's view of free resources.
|
|
|
|
This is just a snapshot of resource usage recorded by the
|
|
virt driver.
|
|
|
|
The following resources are logged:
|
|
- free memory
|
|
- free disk
|
|
- free CPUs
|
|
- assignable PCI devices
|
|
"""
|
|
free_ram_mb = resources['memory_mb'] - resources['memory_mb_used']
|
|
free_disk_gb = resources['local_gb'] - resources['local_gb_used']
|
|
vcpus = resources['vcpus']
|
|
if vcpus:
|
|
free_vcpus = vcpus - resources['vcpus_used']
|
|
LOG.debug("Hypervisor: free VCPUs: %s", free_vcpus)
|
|
else:
|
|
free_vcpus = 'unknown'
|
|
LOG.debug("Hypervisor: VCPU information unavailable")
|
|
|
|
pci_devices = resources.get('pci_passthrough_devices')
|
|
|
|
LOG.debug("Hypervisor/Node resource view: "
|
|
"name=%(node)s "
|
|
"free_ram=%(free_ram)sMB "
|
|
"free_disk=%(free_disk)sGB "
|
|
"free_vcpus=%(free_vcpus)s "
|
|
"pci_devices=%(pci_devices)s",
|
|
{'node': self.nodename,
|
|
'free_ram': free_ram_mb,
|
|
'free_disk': free_disk_gb,
|
|
'free_vcpus': free_vcpus,
|
|
'pci_devices': pci_devices})
|
|
|
|
def _report_final_resource_view(self):
|
|
"""Report final calculate of physical memory, used virtual memory,
|
|
disk, usable vCPUs, used virtual CPUs and PCI devices,
|
|
including instance calculations and in-progress resource claims. These
|
|
values will be exposed via the compute node table to the scheduler.
|
|
"""
|
|
vcpus = self.compute_node.vcpus
|
|
if vcpus:
|
|
tcpu = vcpus
|
|
ucpu = self.compute_node.vcpus_used
|
|
LOG.info(_LI("Total usable vcpus: %(tcpu)s, "
|
|
"total allocated vcpus: %(ucpu)s"),
|
|
{'tcpu': vcpus,
|
|
'ucpu': ucpu})
|
|
else:
|
|
tcpu = 0
|
|
ucpu = 0
|
|
pci_stats = (list(self.compute_node.pci_device_pools) if
|
|
self.compute_node.pci_device_pools else [])
|
|
LOG.info(_LI("Final resource view: "
|
|
"name=%(node)s "
|
|
"phys_ram=%(phys_ram)sMB "
|
|
"used_ram=%(used_ram)sMB "
|
|
"phys_disk=%(phys_disk)sGB "
|
|
"used_disk=%(used_disk)sGB "
|
|
"total_vcpus=%(total_vcpus)s "
|
|
"used_vcpus=%(used_vcpus)s "
|
|
"pci_stats=%(pci_stats)s"),
|
|
{'node': self.nodename,
|
|
'phys_ram': self.compute_node.memory_mb,
|
|
'used_ram': self.compute_node.memory_mb_used,
|
|
'phys_disk': self.compute_node.local_gb,
|
|
'used_disk': self.compute_node.local_gb_used,
|
|
'total_vcpus': tcpu,
|
|
'used_vcpus': ucpu,
|
|
'pci_stats': pci_stats})
|
|
|
|
def _resource_change(self):
|
|
"""Check to see if any resources have changed."""
|
|
if not obj_base.obj_equal_prims(self.compute_node, self.old_resources):
|
|
self.old_resources = copy.deepcopy(self.compute_node)
|
|
return True
|
|
return False
|
|
|
|
def _update(self, context):
|
|
"""Update partial stats locally and populate them to Scheduler."""
|
|
if not self._resource_change():
|
|
return
|
|
# Persist the stats to the Scheduler
|
|
self.scheduler_client.update_resource_stats(self.compute_node)
|
|
if self.pci_tracker:
|
|
self.pci_tracker.save(context)
|
|
|
|
def _update_usage(self, usage, sign=1):
|
|
mem_usage = usage['memory_mb']
|
|
disk_usage = usage.get('root_gb', 0)
|
|
|
|
overhead = self.driver.estimate_instance_overhead(usage)
|
|
mem_usage += overhead['memory_mb']
|
|
disk_usage += overhead.get('disk_gb', 0)
|
|
|
|
self.compute_node.memory_mb_used += sign * mem_usage
|
|
self.compute_node.local_gb_used += sign * disk_usage
|
|
self.compute_node.local_gb_used += sign * usage.get('ephemeral_gb', 0)
|
|
self.compute_node.vcpus_used += sign * usage.get('vcpus', 0)
|
|
|
|
# free ram and disk may be negative, depending on policy:
|
|
self.compute_node.free_ram_mb = (self.compute_node.memory_mb -
|
|
self.compute_node.memory_mb_used)
|
|
self.compute_node.free_disk_gb = (self.compute_node.local_gb -
|
|
self.compute_node.local_gb_used)
|
|
|
|
self.compute_node.running_vms = self.stats.num_instances
|
|
|
|
# Calculate the numa usage
|
|
free = sign == -1
|
|
updated_numa_topology = hardware.get_host_numa_usage_from_instance(
|
|
self.compute_node, usage, free)
|
|
self.compute_node.numa_topology = updated_numa_topology
|
|
|
|
def _get_migration_context_resource(self, resource, instance,
|
|
prefix='new_'):
|
|
migration_context = instance.migration_context
|
|
resource = prefix + resource
|
|
if migration_context and resource in migration_context:
|
|
return getattr(migration_context, resource)
|
|
return None
|
|
|
|
def _update_usage_from_migration(self, context, instance, migration):
|
|
"""Update usage for a single migration. The record may
|
|
represent an incoming or outbound migration.
|
|
"""
|
|
if not _is_trackable_migration(migration):
|
|
return
|
|
|
|
uuid = migration.instance_uuid
|
|
LOG.info(_LI("Updating from migration %s"), uuid)
|
|
|
|
incoming = (migration.dest_compute == self.host and
|
|
migration.dest_node == self.nodename)
|
|
outbound = (migration.source_compute == self.host and
|
|
migration.source_node == self.nodename)
|
|
same_node = (incoming and outbound)
|
|
|
|
record = self.tracked_instances.get(uuid, None)
|
|
itype = None
|
|
numa_topology = None
|
|
sign = 0
|
|
if same_node:
|
|
# same node resize. record usage for whichever instance type the
|
|
# instance is *not* in:
|
|
if (instance['instance_type_id'] ==
|
|
migration.old_instance_type_id):
|
|
itype = self._get_instance_type(context, instance, 'new_',
|
|
migration)
|
|
numa_topology = self._get_migration_context_resource(
|
|
'numa_topology', instance)
|
|
# Allocate pci device(s) for the instance.
|
|
sign = 1
|
|
else:
|
|
# instance record already has new flavor, hold space for a
|
|
# possible revert to the old instance type:
|
|
itype = self._get_instance_type(context, instance, 'old_',
|
|
migration)
|
|
numa_topology = self._get_migration_context_resource(
|
|
'numa_topology', instance, prefix='old_')
|
|
|
|
elif incoming and not record:
|
|
# instance has not yet migrated here:
|
|
itype = self._get_instance_type(context, instance, 'new_',
|
|
migration)
|
|
numa_topology = self._get_migration_context_resource(
|
|
'numa_topology', instance)
|
|
# Allocate pci device(s) for the instance.
|
|
sign = 1
|
|
|
|
elif outbound and not record:
|
|
# instance migrated, but record usage for a possible revert:
|
|
itype = self._get_instance_type(context, instance, 'old_',
|
|
migration)
|
|
numa_topology = self._get_migration_context_resource(
|
|
'numa_topology', instance, prefix='old_')
|
|
|
|
if itype:
|
|
usage = self._get_usage_dict(
|
|
itype, numa_topology=numa_topology)
|
|
if self.pci_tracker and sign:
|
|
self.pci_tracker.update_pci_for_instance(
|
|
context, instance, sign=sign)
|
|
self._update_usage(usage)
|
|
if self.pci_tracker:
|
|
obj = self.pci_tracker.stats.to_device_pools_obj()
|
|
self.compute_node.pci_device_pools = obj
|
|
else:
|
|
obj = objects.PciDevicePoolList()
|
|
self.compute_node.pci_device_pools = obj
|
|
self.tracked_migrations[uuid] = (migration, itype)
|
|
|
|
def _update_usage_from_migrations(self, context, migrations):
|
|
filtered = {}
|
|
instances = {}
|
|
self.tracked_migrations.clear()
|
|
|
|
# do some defensive filtering against bad migrations records in the
|
|
# database:
|
|
for migration in migrations:
|
|
uuid = migration.instance_uuid
|
|
|
|
try:
|
|
if uuid not in instances:
|
|
instances[uuid] = migration.instance
|
|
except exception.InstanceNotFound as e:
|
|
# migration referencing deleted instance
|
|
LOG.debug('Migration instance not found: %s', e)
|
|
continue
|
|
|
|
# skip migration if instance isn't in a resize state:
|
|
if not _instance_in_resize_state(instances[uuid]):
|
|
LOG.warning(_LW("Instance not resizing, skipping migration."),
|
|
instance_uuid=uuid)
|
|
continue
|
|
|
|
# filter to most recently updated migration for each instance:
|
|
other_migration = filtered.get(uuid, None)
|
|
# NOTE(claudiub): In Python 3, you cannot compare NoneTypes.
|
|
if (not other_migration or (
|
|
migration.updated_at and other_migration.updated_at and
|
|
migration.updated_at >= other_migration.updated_at)):
|
|
filtered[uuid] = migration
|
|
|
|
for migration in filtered.values():
|
|
instance = instances[migration.instance_uuid]
|
|
try:
|
|
self._update_usage_from_migration(context, instance, migration)
|
|
except exception.FlavorNotFound:
|
|
LOG.warning(_LW("Flavor could not be found, skipping "
|
|
"migration."), instance_uuid=instance.uuid)
|
|
continue
|
|
|
|
def _update_usage_from_instance(self, context, instance, is_removed=False):
|
|
"""Update usage for a single instance."""
|
|
|
|
uuid = instance['uuid']
|
|
is_new_instance = uuid not in self.tracked_instances
|
|
# NOTE(sfinucan): Both brand new instances as well as instances that
|
|
# are being unshelved will have is_new_instance == True
|
|
is_removed_instance = not is_new_instance and (is_removed or
|
|
instance['vm_state'] in vm_states.ALLOW_RESOURCE_REMOVAL)
|
|
|
|
if is_new_instance:
|
|
self.tracked_instances[uuid] = obj_base.obj_to_primitive(instance)
|
|
sign = 1
|
|
|
|
if is_removed_instance:
|
|
self.tracked_instances.pop(uuid)
|
|
sign = -1
|
|
|
|
self.stats.update_stats_for_instance(instance, is_removed_instance)
|
|
self.compute_node.stats = copy.deepcopy(self.stats)
|
|
|
|
# if it's a new or deleted instance:
|
|
if is_new_instance or is_removed_instance:
|
|
if self.pci_tracker:
|
|
self.pci_tracker.update_pci_for_instance(context,
|
|
instance,
|
|
sign=sign)
|
|
self.scheduler_client.reportclient.update_instance_allocation(
|
|
self.compute_node, instance, sign)
|
|
# new instance, update compute node resource usage:
|
|
self._update_usage(self._get_usage_dict(instance), sign=sign)
|
|
|
|
self.compute_node.current_workload = self.stats.calculate_workload()
|
|
if self.pci_tracker:
|
|
obj = self.pci_tracker.stats.to_device_pools_obj()
|
|
self.compute_node.pci_device_pools = obj
|
|
else:
|
|
self.compute_node.pci_device_pools = objects.PciDevicePoolList()
|
|
|
|
def _update_usage_from_instances(self, context, instances):
|
|
"""Calculate resource usage based on instance utilization. This is
|
|
different than the hypervisor's view as it will account for all
|
|
instances assigned to the local compute host, even if they are not
|
|
currently powered on.
|
|
"""
|
|
self.tracked_instances.clear()
|
|
|
|
# set some initial values, reserve room for host/hypervisor:
|
|
self.compute_node.local_gb_used = CONF.reserved_host_disk_mb / 1024
|
|
self.compute_node.memory_mb_used = CONF.reserved_host_memory_mb
|
|
self.compute_node.vcpus_used = 0
|
|
self.compute_node.free_ram_mb = (self.compute_node.memory_mb -
|
|
self.compute_node.memory_mb_used)
|
|
self.compute_node.free_disk_gb = (self.compute_node.local_gb -
|
|
self.compute_node.local_gb_used)
|
|
self.compute_node.current_workload = 0
|
|
self.compute_node.running_vms = 0
|
|
|
|
for instance in instances:
|
|
if instance.vm_state not in vm_states.ALLOW_RESOURCE_REMOVAL:
|
|
self._update_usage_from_instance(context, instance)
|
|
self.compute_node.free_ram_mb = max(0, self.compute_node.free_ram_mb)
|
|
self.compute_node.free_disk_gb = max(0, self.compute_node.free_disk_gb)
|
|
|
|
def _find_orphaned_instances(self):
|
|
"""Given the set of instances and migrations already account for
|
|
by resource tracker, sanity check the hypervisor to determine
|
|
if there are any "orphaned" instances left hanging around.
|
|
|
|
Orphans could be consuming memory and should be accounted for in
|
|
usage calculations to guard against potential out of memory
|
|
errors.
|
|
"""
|
|
uuids1 = frozenset(self.tracked_instances.keys())
|
|
uuids2 = frozenset(self.tracked_migrations.keys())
|
|
uuids = uuids1 | uuids2
|
|
|
|
usage = self.driver.get_per_instance_usage()
|
|
vuuids = frozenset(usage.keys())
|
|
|
|
orphan_uuids = vuuids - uuids
|
|
orphans = [usage[uuid] for uuid in orphan_uuids]
|
|
|
|
return orphans
|
|
|
|
def _update_usage_from_orphans(self, orphans):
|
|
"""Include orphaned instances in usage."""
|
|
for orphan in orphans:
|
|
memory_mb = orphan['memory_mb']
|
|
|
|
LOG.warning(_LW("Detected running orphan instance: %(uuid)s "
|
|
"(consuming %(memory_mb)s MB memory)"),
|
|
{'uuid': orphan['uuid'], 'memory_mb': memory_mb})
|
|
|
|
# just record memory usage for the orphan
|
|
usage = {'memory_mb': memory_mb}
|
|
self._update_usage(usage)
|
|
|
|
def _verify_resources(self, resources):
|
|
resource_keys = ["vcpus", "memory_mb", "local_gb", "cpu_info",
|
|
"vcpus_used", "memory_mb_used", "local_gb_used",
|
|
"numa_topology"]
|
|
|
|
missing_keys = [k for k in resource_keys if k not in resources]
|
|
if missing_keys:
|
|
reason = _("Missing keys: %s") % missing_keys
|
|
raise exception.InvalidInput(reason=reason)
|
|
|
|
def _get_instance_type(self, context, instance, prefix, migration):
|
|
"""Get the instance type from instance."""
|
|
stashed_flavors = migration.migration_type in ('resize',)
|
|
if stashed_flavors:
|
|
return getattr(instance, '%sflavor' % prefix)
|
|
else:
|
|
# NOTE(ndipanov): Certain migration types (all but resize)
|
|
# do not change flavors so there is no need to stash
|
|
# them. In that case - just get the instance flavor.
|
|
return instance.flavor
|
|
|
|
def _get_usage_dict(self, object_or_dict, **updates):
|
|
"""Make a usage dict _update methods expect.
|
|
|
|
Accepts a dict or an Instance or Flavor object, and a set of updates.
|
|
Converts the object to a dict and applies the updates.
|
|
|
|
:param object_or_dict: instance or flavor as an object or just a dict
|
|
:param updates: key-value pairs to update the passed object.
|
|
Currently only considers 'numa_topology', all other
|
|
keys are ignored.
|
|
|
|
:returns: a dict with all the information from object_or_dict updated
|
|
with updates
|
|
"""
|
|
usage = {}
|
|
if isinstance(object_or_dict, objects.Instance):
|
|
usage = {'memory_mb': object_or_dict.flavor.memory_mb,
|
|
'vcpus': object_or_dict.flavor.vcpus,
|
|
'root_gb': object_or_dict.flavor.root_gb,
|
|
'ephemeral_gb': object_or_dict.flavor.ephemeral_gb,
|
|
'numa_topology': object_or_dict.numa_topology}
|
|
elif isinstance(object_or_dict, objects.Flavor):
|
|
usage = obj_base.obj_to_primitive(object_or_dict)
|
|
else:
|
|
usage.update(object_or_dict)
|
|
|
|
for key in ('numa_topology',):
|
|
if key in updates:
|
|
usage[key] = updates[key]
|
|
return usage
|