301 lines
13 KiB
Python
301 lines
13 KiB
Python
# Copyright 2013 IBM Corp
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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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from oslo.serialization import jsonutils
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from nova import db
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from nova import exception
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from nova import objects
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from nova.objects import base
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from nova.objects import fields
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from nova import utils
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# TODO(berrange): Remove NovaObjectDictCompat
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class ComputeNode(base.NovaPersistentObject, base.NovaObject,
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base.NovaObjectDictCompat):
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# Version 1.0: Initial version
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# Version 1.1: Added get_by_service_id()
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# Version 1.2: String attributes updated to support unicode
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# Version 1.3: Added stats field
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# Version 1.4: Added host ip field
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# Version 1.5: Added numa_topology field
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# Version 1.6: Added supported_hv_specs
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# Version 1.7: Added host field
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# Version 1.8: Added get_by_host_and_nodename()
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VERSION = '1.8'
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fields = {
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'id': fields.IntegerField(read_only=True),
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'service_id': fields.IntegerField(),
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'host': fields.StringField(nullable=True),
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'vcpus': fields.IntegerField(),
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'memory_mb': fields.IntegerField(),
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'local_gb': fields.IntegerField(),
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'vcpus_used': fields.IntegerField(),
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'memory_mb_used': fields.IntegerField(),
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'local_gb_used': fields.IntegerField(),
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'hypervisor_type': fields.StringField(),
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'hypervisor_version': fields.IntegerField(),
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'hypervisor_hostname': fields.StringField(nullable=True),
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'free_ram_mb': fields.IntegerField(nullable=True),
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'free_disk_gb': fields.IntegerField(nullable=True),
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'current_workload': fields.IntegerField(nullable=True),
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'running_vms': fields.IntegerField(nullable=True),
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'cpu_info': fields.StringField(nullable=True),
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'disk_available_least': fields.IntegerField(nullable=True),
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'metrics': fields.StringField(nullable=True),
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'stats': fields.DictOfNullableStringsField(nullable=True),
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'host_ip': fields.IPAddressField(nullable=True),
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'numa_topology': fields.StringField(nullable=True),
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# NOTE(pmurray): the supported_hv_specs field maps to the
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# supported_instances field in the database
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'supported_hv_specs': fields.ListOfObjectsField('HVSpec'),
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}
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obj_relationships = {
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'supported_hv_specs': [('1.6', '1.0')],
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}
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def obj_make_compatible(self, primitive, target_version):
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super(ComputeNode, self).obj_make_compatible(primitive, target_version)
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target_version = utils.convert_version_to_tuple(target_version)
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if target_version < (1, 7) and 'host' in primitive:
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del primitive['host']
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if target_version < (1, 5) and 'numa_topology' in primitive:
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del primitive['numa_topology']
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if target_version < (1, 4) and 'host_ip' in primitive:
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del primitive['host_ip']
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if target_version < (1, 3) and 'stats' in primitive:
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# pre 1.3 version does not have a stats field
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del primitive['stats']
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@staticmethod
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def _host_from_db_object(compute, db_compute):
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if (('host' not in db_compute or db_compute['host'] is None)
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and 'service_id' in db_compute
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and db_compute['service_id'] is not None):
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# FIXME(sbauza) : Unconverted compute record, provide compatibility
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# This has to stay until we can be sure that any/all compute nodes
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# in the database have been converted to use the host field
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# Service field of ComputeNode could be deprecated in a next patch,
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# so let's use directly the Service object
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try:
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service = objects.Service.get_by_id(
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compute._context, db_compute['service_id'])
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except exception.ServiceNotFound:
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compute['host'] = None
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return
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try:
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compute['host'] = service.host
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except (AttributeError, exception.OrphanedObjectError):
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# Host can be nullable in Service
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compute['host'] = None
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elif 'host' in db_compute and db_compute['host'] is not None:
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# New-style DB having host as a field
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compute['host'] = db_compute['host']
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else:
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# We assume it should not happen but in case, let's set it to None
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compute['host'] = None
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@staticmethod
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def _from_db_object(context, compute, db_compute):
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fields = set(compute.fields) - set(['stats', 'supported_hv_specs',
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'host'])
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for key in fields:
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compute[key] = db_compute[key]
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stats = db_compute['stats']
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if stats:
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compute['stats'] = jsonutils.loads(stats)
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sup_insts = db_compute.get('supported_instances')
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if sup_insts:
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hv_specs = jsonutils.loads(sup_insts)
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hv_specs = [objects.HVSpec.from_list(hv_spec)
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for hv_spec in hv_specs]
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compute['supported_hv_specs'] = hv_specs
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compute._context = context
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# Make sure that we correctly set the host field depending on either
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# host column is present in the table or not
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compute._host_from_db_object(compute, db_compute)
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compute.obj_reset_changes()
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return compute
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@base.remotable_classmethod
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def get_by_id(cls, context, compute_id):
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db_compute = db.compute_node_get(context, compute_id)
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return cls._from_db_object(context, cls(), db_compute)
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@base.remotable_classmethod
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def get_by_service_id(cls, context, service_id):
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db_compute = db.compute_node_get_by_service_id(context, service_id)
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return cls._from_db_object(context, cls(), db_compute)
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@base.remotable_classmethod
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def get_by_host_and_nodename(cls, context, host, nodename):
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try:
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db_compute = db.compute_node_get_by_host_and_nodename(
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context, host, nodename)
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except exception.ComputeHostNotFound:
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# FIXME(sbauza): Some old computes can still have no host record
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# We need to provide compatibility by using the old service_id
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# record.
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# We assume the compatibility as an extra penalty of one more DB
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# call but that's necessary until all nodes are upgraded.
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service = objects.Service.get_by_compute_host(context, host)
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# NOTE(sbauza): Here, the old model is buggy because there can only
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# be one compute node per service_id
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db_compute = db.compute_node_get_by_service_id(context, service.id)
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# We can avoid an extra call to Service object in _from_db_object
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db_compute['host'] = service.host
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return cls._from_db_object(context, cls(), db_compute)
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def _convert_stats_to_db_format(self, updates):
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stats = updates.pop('stats', None)
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if stats is not None:
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updates['stats'] = jsonutils.dumps(stats)
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def _convert_host_ip_to_db_format(self, updates):
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host_ip = updates.pop('host_ip', None)
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if host_ip:
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updates['host_ip'] = str(host_ip)
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def _convert_supported_instances_to_db_format(selfself, updates):
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hv_specs = updates.pop('supported_hv_specs', None)
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if hv_specs is not None:
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hv_specs = [hv_spec.to_list() for hv_spec in hv_specs]
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updates['supported_instances'] = jsonutils.dumps(hv_specs)
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@base.remotable
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def create(self, context):
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if self.obj_attr_is_set('id'):
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raise exception.ObjectActionError(action='create',
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reason='already created')
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updates = self.obj_get_changes()
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self._convert_stats_to_db_format(updates)
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self._convert_host_ip_to_db_format(updates)
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self._convert_supported_instances_to_db_format(updates)
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db_compute = db.compute_node_create(context, updates)
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self._from_db_object(context, self, db_compute)
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@base.remotable
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def save(self, context, prune_stats=False):
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# NOTE(belliott) ignore prune_stats param, no longer relevant
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updates = self.obj_get_changes()
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updates.pop('id', None)
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self._convert_stats_to_db_format(updates)
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self._convert_host_ip_to_db_format(updates)
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self._convert_supported_instances_to_db_format(updates)
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db_compute = db.compute_node_update(context, self.id, updates)
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self._from_db_object(context, self, db_compute)
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@base.remotable
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def destroy(self, context):
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db.compute_node_delete(context, self.id)
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@property
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def service(self):
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if not hasattr(self, '_cached_service'):
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self._cached_service = objects.Service.get_by_id(self._context,
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self.service_id)
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return self._cached_service
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# TODO(berrange): Remove NovaObjectDictCompat
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class ComputeNodeList(base.ObjectListBase, base.NovaObject,
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base.NovaObjectDictCompat):
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# Version 1.0: Initial version
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# ComputeNode <= version 1.2
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# Version 1.1 ComputeNode version 1.3
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# Version 1.2 Add get_by_service()
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# Version 1.3 ComputeNode version 1.4
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# Version 1.4 ComputeNode version 1.5
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# Version 1.5 Add use_slave to get_by_service
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# Version 1.6 ComputeNode version 1.6
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# Version 1.7 ComputeNode version 1.7
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# Version 1.8 ComputeNode version 1.8 + add get_all_by_host()
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VERSION = '1.8'
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fields = {
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'objects': fields.ListOfObjectsField('ComputeNode'),
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}
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child_versions = {
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'1.0': '1.2',
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# NOTE(danms): ComputeNode was at 1.2 before we added this
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'1.1': '1.3',
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'1.2': '1.3',
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'1.3': '1.4',
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'1.4': '1.5',
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'1.5': '1.5',
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'1.6': '1.6',
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'1.7': '1.7',
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'1.8': '1.8',
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}
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@base.remotable_classmethod
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def get_all(cls, context):
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db_computes = db.compute_node_get_all(context)
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return base.obj_make_list(context, cls(context), objects.ComputeNode,
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db_computes)
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@base.remotable_classmethod
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def get_by_hypervisor(cls, context, hypervisor_match):
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db_computes = db.compute_node_search_by_hypervisor(context,
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hypervisor_match)
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return base.obj_make_list(context, cls(context), objects.ComputeNode,
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db_computes)
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@base.remotable_classmethod
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def _get_by_service(cls, context, service_id, use_slave=False):
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db_service = db.service_get(context, service_id,
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with_compute_node=True,
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use_slave=use_slave)
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return base.obj_make_list(context, cls(context), objects.ComputeNode,
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db_service['compute_node'])
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@classmethod
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def get_by_service(cls, context, service, use_slave=False):
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return cls._get_by_service(context, service.id, use_slave=use_slave)
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@base.remotable_classmethod
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def get_all_by_host(cls, context, host, use_slave=False):
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try:
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db_computes = db.compute_node_get_all_by_host(context, host,
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use_slave)
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except exception.ComputeHostNotFound:
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# FIXME(sbauza): Some old computes can still have no host record
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# We need to provide compatibility by using the old service_id
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# record.
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# We assume the compatibility as an extra penalty of one more DB
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# call but that's necessary until all nodes are upgraded.
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service = objects.Service.get_by_compute_host(context, host,
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use_slave)
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db_compute = db.compute_node_get_by_service_id(context,
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service.id)
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# We can avoid an extra call to Service object in _from_db_object
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db_compute['host'] = service.host
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# NOTE(sbauza): Yeah, the old model sucks, because there can only
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# be one node per host...
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db_computes = [db_compute]
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return base.obj_make_list(context, cls(context), objects.ComputeNode,
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db_computes)
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