233 lines
8.7 KiB
Python
233 lines
8.7 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
from sqlalchemy.orm import joinedload
|
|
|
|
from nova import context
|
|
from nova.db.sqlalchemy import api as db_api
|
|
from nova.db.sqlalchemy import api_models
|
|
from nova import exception
|
|
from nova.i18n import _
|
|
from nova.objects import base
|
|
from nova.objects import cell_mapping
|
|
from nova.objects import fields
|
|
|
|
|
|
def _cell_id_in_updates(updates):
|
|
cell_mapping_obj = updates.pop("cell_mapping", None)
|
|
if cell_mapping_obj:
|
|
updates["cell_id"] = cell_mapping_obj.id
|
|
|
|
|
|
def _apply_updates(context, db_mapping, updates):
|
|
db_mapping.update(updates)
|
|
db_mapping.save(context.session)
|
|
# NOTE: This is done because a later access will trigger a lazy load
|
|
# outside of the db session so it will fail. We don't lazy load
|
|
# cell_mapping on the object later because we never need a HostMapping
|
|
# without the CellMapping.
|
|
db_mapping.cell_mapping
|
|
return db_mapping
|
|
|
|
|
|
@base.NovaObjectRegistry.register
|
|
class HostMapping(base.NovaTimestampObject, base.NovaObject):
|
|
# Version 1.0: Initial version
|
|
VERSION = '1.0'
|
|
|
|
fields = {
|
|
'id': fields.IntegerField(read_only=True),
|
|
'host': fields.StringField(),
|
|
'cell_mapping': fields.ObjectField('CellMapping'),
|
|
}
|
|
|
|
def _get_cell_mapping(self):
|
|
with db_api.api_context_manager.reader.using(self._context) as session:
|
|
cell_map = (session.query(api_models.CellMapping)
|
|
.join(api_models.HostMapping)
|
|
.filter(api_models.HostMapping.host == self.host)
|
|
.first())
|
|
if cell_map is not None:
|
|
return cell_mapping.CellMapping._from_db_object(
|
|
self._context, cell_mapping.CellMapping(), cell_map)
|
|
|
|
def _load_cell_mapping(self):
|
|
self.cell_mapping = self._get_cell_mapping()
|
|
|
|
def obj_load_attr(self, attrname):
|
|
if attrname == 'cell_mapping':
|
|
self._load_cell_mapping()
|
|
|
|
@staticmethod
|
|
def _from_db_object(context, host_mapping, db_host_mapping):
|
|
for key in host_mapping.fields:
|
|
db_value = db_host_mapping.get(key)
|
|
if key == "cell_mapping":
|
|
# NOTE(dheeraj): If cell_mapping is stashed in db object
|
|
# we load it here. Otherwise, lazy loading will happen
|
|
# when .cell_mapping is accessed later
|
|
if not db_value:
|
|
continue
|
|
db_value = cell_mapping.CellMapping._from_db_object(
|
|
host_mapping._context, cell_mapping.CellMapping(),
|
|
db_value)
|
|
setattr(host_mapping, key, db_value)
|
|
host_mapping.obj_reset_changes()
|
|
host_mapping._context = context
|
|
return host_mapping
|
|
|
|
@staticmethod
|
|
@db_api.api_context_manager.reader
|
|
def _get_by_host_from_db(context, host):
|
|
db_mapping = (context.session.query(api_models.HostMapping)
|
|
.options(joinedload('cell_mapping'))
|
|
.filter(api_models.HostMapping.host == host)).first()
|
|
if not db_mapping:
|
|
raise exception.HostMappingNotFound(name=host)
|
|
return db_mapping
|
|
|
|
@base.remotable_classmethod
|
|
def get_by_host(cls, context, host):
|
|
db_mapping = cls._get_by_host_from_db(context, host)
|
|
return cls._from_db_object(context, cls(), db_mapping)
|
|
|
|
@staticmethod
|
|
@db_api.api_context_manager.writer
|
|
def _create_in_db(context, updates):
|
|
db_mapping = api_models.HostMapping()
|
|
return _apply_updates(context, db_mapping, updates)
|
|
|
|
@base.remotable
|
|
def create(self):
|
|
changes = self.obj_get_changes()
|
|
# cell_mapping must be mapped to cell_id for create
|
|
_cell_id_in_updates(changes)
|
|
db_mapping = self._create_in_db(self._context, changes)
|
|
self._from_db_object(self._context, self, db_mapping)
|
|
|
|
@staticmethod
|
|
@db_api.api_context_manager.writer
|
|
def _save_in_db(context, obj, updates):
|
|
db_mapping = context.session.query(api_models.HostMapping).filter_by(
|
|
id=obj.id).first()
|
|
if not db_mapping:
|
|
raise exception.HostMappingNotFound(name=obj.host)
|
|
return _apply_updates(context, db_mapping, updates)
|
|
|
|
@base.remotable
|
|
def save(self):
|
|
changes = self.obj_get_changes()
|
|
# cell_mapping must be mapped to cell_id for updates
|
|
_cell_id_in_updates(changes)
|
|
db_mapping = self._save_in_db(self._context, self, changes)
|
|
self._from_db_object(self._context, self, db_mapping)
|
|
self.obj_reset_changes()
|
|
|
|
@staticmethod
|
|
@db_api.api_context_manager.writer
|
|
def _destroy_in_db(context, host):
|
|
result = context.session.query(api_models.HostMapping).filter_by(
|
|
host=host).delete()
|
|
if not result:
|
|
raise exception.HostMappingNotFound(name=host)
|
|
|
|
@base.remotable
|
|
def destroy(self):
|
|
self._destroy_in_db(self._context, self.host)
|
|
|
|
|
|
@base.NovaObjectRegistry.register
|
|
class HostMappingList(base.ObjectListBase, base.NovaObject):
|
|
# Version 1.0: Initial version
|
|
VERSION = '1.0'
|
|
|
|
fields = {
|
|
'objects': fields.ListOfObjectsField('HostMapping'),
|
|
}
|
|
|
|
@staticmethod
|
|
@db_api.api_context_manager.reader
|
|
def _get_by_cell_id_from_db(context, cell_id):
|
|
return (context.session.query(api_models.HostMapping)
|
|
.options(joinedload('cell_mapping'))
|
|
.filter(api_models.HostMapping.cell_id == cell_id)).all()
|
|
|
|
@base.remotable_classmethod
|
|
def get_by_cell_id(cls, context, cell_id):
|
|
db_mappings = cls._get_by_cell_id_from_db(context, cell_id)
|
|
return base.obj_make_list(context, cls(), HostMapping, db_mappings)
|
|
|
|
|
|
def _check_and_create_host_mappings(ctxt, cm, compute_nodes, status_fn):
|
|
host_mappings = []
|
|
for compute in compute_nodes:
|
|
status_fn(_("Checking host mapping for compute host "
|
|
"'%(host)s': %(uuid)s") %
|
|
{'host': compute.host, 'uuid': compute.uuid})
|
|
try:
|
|
HostMapping.get_by_host(ctxt, compute.host)
|
|
except exception.HostMappingNotFound:
|
|
status_fn(_("Creating host mapping for compute host "
|
|
"'%(host)s': %(uuid)s") %
|
|
{'host': compute.host, 'uuid': compute.uuid})
|
|
host_mapping = HostMapping(
|
|
ctxt, host=compute.host,
|
|
cell_mapping=cm)
|
|
host_mapping.create()
|
|
host_mappings.append(host_mapping)
|
|
compute.mapped = 1
|
|
compute.save()
|
|
return host_mappings
|
|
|
|
|
|
def discover_hosts(ctxt, cell_uuid=None, status_fn=None):
|
|
# TODO(alaski): If this is not run on a host configured to use the API
|
|
# database most of the lookups below will fail and may not provide a
|
|
# great error message. Add a check which will raise a useful error
|
|
# message about running this from an API host.
|
|
|
|
from nova import objects
|
|
|
|
if not status_fn:
|
|
status_fn = lambda x: None
|
|
|
|
if cell_uuid:
|
|
cell_mappings = [objects.CellMapping.get_by_uuid(ctxt, cell_uuid)]
|
|
else:
|
|
cell_mappings = objects.CellMappingList.get_all(ctxt)
|
|
status_fn(_('Found %s cell mappings.') % len(cell_mappings))
|
|
|
|
host_mappings = []
|
|
for cm in cell_mappings:
|
|
if cm.is_cell0():
|
|
status_fn(_('Skipping cell0 since it does not contain hosts.'))
|
|
continue
|
|
if 'name' in cm and cm.name:
|
|
status_fn(_("Getting compute nodes from cell '%(name)s': "
|
|
"%(uuid)s") % {'name': cm.name,
|
|
'uuid': cm.uuid})
|
|
else:
|
|
status_fn(_("Getting compute nodes from cell: %(uuid)s") %
|
|
{'uuid': cm.uuid})
|
|
with context.target_cell(ctxt, cm) as cctxt:
|
|
compute_nodes = objects.ComputeNodeList.get_all_by_not_mapped(
|
|
cctxt, 1)
|
|
status_fn(_('Found %(num)s unmapped computes in cell: %(uuid)s') %
|
|
{'num': len(compute_nodes),
|
|
'uuid': cm.uuid})
|
|
added_hm = _check_and_create_host_mappings(cctxt, cm,
|
|
compute_nodes,
|
|
status_fn)
|
|
host_mappings.extend(added_hm)
|
|
|
|
return host_mappings
|