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api.py
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api.py
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# Copyright (c) 2011 X.commerce, a business unit of eBay Inc.
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# 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.
"""Implementation of SQLAlchemy backend."""
import collections
import copy
import datetime
import functools
import inspect
import sys
from oslo_db import api as oslo_db_api
from oslo_db import exception as db_exc
from oslo_db.sqlalchemy import enginefacade
from oslo_db.sqlalchemy import update_match
from oslo_db.sqlalchemy import utils as sqlalchemyutils
from oslo_log import log as logging
from oslo_utils import excutils
from oslo_utils import importutils
from oslo_utils import timeutils
from oslo_utils import uuidutils
import six
from six.moves import range
import sqlalchemy as sa
from sqlalchemy import and_
from sqlalchemy import Boolean
from sqlalchemy.exc import NoSuchTableError
from sqlalchemy.ext.compiler import compiles
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import or_
from sqlalchemy.orm import aliased
from sqlalchemy.orm import contains_eager
from sqlalchemy.orm import joinedload
from sqlalchemy.orm import joinedload_all
from sqlalchemy.orm import noload
from sqlalchemy.orm import undefer
from sqlalchemy.schema import Table
from sqlalchemy import sql
from sqlalchemy.sql.expression import asc
from sqlalchemy.sql.expression import cast
from sqlalchemy.sql.expression import desc
from sqlalchemy.sql.expression import UpdateBase
from sqlalchemy.sql import false
from sqlalchemy.sql import func
from sqlalchemy.sql import null
from sqlalchemy.sql import true
from nova import block_device
from nova.compute import task_states
from nova.compute import vm_states
import nova.conf
import nova.context
from nova.db.sqlalchemy import models
from nova import exception
from nova.i18n import _
from nova import safe_utils
profiler_sqlalchemy = importutils.try_import('osprofiler.sqlalchemy')
CONF = nova.conf.CONF
LOG = logging.getLogger(__name__)
main_context_manager = enginefacade.transaction_context()
api_context_manager = enginefacade.transaction_context()
def _get_db_conf(conf_group, connection=None):
kw = dict(
connection=connection or conf_group.connection,
slave_connection=conf_group.slave_connection,
sqlite_fk=False,
__autocommit=True,
expire_on_commit=False,
mysql_sql_mode=conf_group.mysql_sql_mode,
connection_recycle_time=conf_group.connection_recycle_time,
connection_debug=conf_group.connection_debug,
max_pool_size=conf_group.max_pool_size,
max_overflow=conf_group.max_overflow,
pool_timeout=conf_group.pool_timeout,
sqlite_synchronous=conf_group.sqlite_synchronous,
connection_trace=conf_group.connection_trace,
max_retries=conf_group.max_retries,
retry_interval=conf_group.retry_interval)
return kw
def _context_manager_from_context(context):
if context:
try:
return context.db_connection
except AttributeError:
pass
def configure(conf):
main_context_manager.configure(**_get_db_conf(conf.database))
api_context_manager.configure(**_get_db_conf(conf.api_database))
if profiler_sqlalchemy and CONF.profiler.enabled \
and CONF.profiler.trace_sqlalchemy:
main_context_manager.append_on_engine_create(
lambda eng: profiler_sqlalchemy.add_tracing(sa, eng, "db"))
api_context_manager.append_on_engine_create(
lambda eng: profiler_sqlalchemy.add_tracing(sa, eng, "db"))
def create_context_manager(connection=None):
"""Create a database context manager object.
: param connection: The database connection string
"""
ctxt_mgr = enginefacade.transaction_context()
ctxt_mgr.configure(**_get_db_conf(CONF.database, connection=connection))
return ctxt_mgr
def get_context_manager(context):
"""Get a database context manager object.
:param context: The request context that can contain a context manager
"""
return _context_manager_from_context(context) or main_context_manager
def get_engine(use_slave=False, context=None):
"""Get a database engine object.
:param use_slave: Whether to use the slave connection
:param context: The request context that can contain a context manager
"""
ctxt_mgr = get_context_manager(context)
return ctxt_mgr.get_legacy_facade().get_engine(use_slave=use_slave)
def get_api_engine():
return api_context_manager.get_legacy_facade().get_engine()
_SHADOW_TABLE_PREFIX = 'shadow_'
_DEFAULT_QUOTA_NAME = 'default'
PER_PROJECT_QUOTAS = ['fixed_ips', 'floating_ips', 'networks']
def get_backend():
"""The backend is this module itself."""
return sys.modules[__name__]
def require_context(f):
"""Decorator to require *any* user or admin context.
This does no authorization for user or project access matching, see
:py:func:`nova.context.authorize_project_context` and
:py:func:`nova.context.authorize_user_context`.
The first argument to the wrapped function must be the context.
"""
@functools.wraps(f)
def wrapper(*args, **kwargs):
nova.context.require_context(args[0])
return f(*args, **kwargs)
return wrapper
def require_instance_exists_using_uuid(f):
"""Decorator to require the specified instance to exist.
Requires the wrapped function to use context and instance_uuid as
their first two arguments.
"""
@functools.wraps(f)
def wrapper(context, instance_uuid, *args, **kwargs):
instance_get_by_uuid(context, instance_uuid)
return f(context, instance_uuid, *args, **kwargs)
return wrapper
def require_aggregate_exists(f):
"""Decorator to require the specified aggregate to exist.
Requires the wrapped function to use context and aggregate_id as
their first two arguments.
"""
@functools.wraps(f)
def wrapper(context, aggregate_id, *args, **kwargs):
aggregate_get(context, aggregate_id)
return f(context, aggregate_id, *args, **kwargs)
return wrapper
def select_db_reader_mode(f):
"""Decorator to select synchronous or asynchronous reader mode.
The kwarg argument 'use_slave' defines reader mode. Asynchronous reader
will be used if 'use_slave' is True and synchronous reader otherwise.
If 'use_slave' is not specified default value 'False' will be used.
Wrapped function must have a context in the arguments.
"""
@functools.wraps(f)
def wrapper(*args, **kwargs):
wrapped_func = safe_utils.get_wrapped_function(f)
keyed_args = inspect.getcallargs(wrapped_func, *args, **kwargs)
context = keyed_args['context']
use_slave = keyed_args.get('use_slave', False)
if use_slave:
reader_mode = get_context_manager(context).async
else:
reader_mode = get_context_manager(context).reader
with reader_mode.using(context):
return f(*args, **kwargs)
return wrapper
def pick_context_manager_writer(f):
"""Decorator to use a writer db context manager.
The db context manager will be picked from the RequestContext.
Wrapped function must have a RequestContext in the arguments.
"""
@functools.wraps(f)
def wrapped(context, *args, **kwargs):
ctxt_mgr = get_context_manager(context)
with ctxt_mgr.writer.using(context):
return f(context, *args, **kwargs)
return wrapped
def pick_context_manager_reader(f):
"""Decorator to use a reader db context manager.
The db context manager will be picked from the RequestContext.
Wrapped function must have a RequestContext in the arguments.
"""
@functools.wraps(f)
def wrapped(context, *args, **kwargs):
ctxt_mgr = get_context_manager(context)
with ctxt_mgr.reader.using(context):
return f(context, *args, **kwargs)
return wrapped
def pick_context_manager_reader_allow_async(f):
"""Decorator to use a reader.allow_async db context manager.
The db context manager will be picked from the RequestContext.
Wrapped function must have a RequestContext in the arguments.
"""
@functools.wraps(f)
def wrapped(context, *args, **kwargs):
ctxt_mgr = get_context_manager(context)
with ctxt_mgr.reader.allow_async.using(context):
return f(context, *args, **kwargs)
return wrapped
def model_query(context, model,
args=None,
read_deleted=None,
project_only=False):
"""Query helper that accounts for context's `read_deleted` field.
:param context: NovaContext of the query.
:param model: Model to query. Must be a subclass of ModelBase.
:param args: Arguments to query. If None - model is used.
:param read_deleted: If not None, overrides context's read_deleted field.
Permitted values are 'no', which does not return
deleted values; 'only', which only returns deleted
values; and 'yes', which does not filter deleted
values.
:param project_only: If set and context is user-type, then restrict
query to match the context's project_id. If set to
'allow_none', restriction includes project_id = None.
"""
if read_deleted is None:
read_deleted = context.read_deleted
query_kwargs = {}
if 'no' == read_deleted:
query_kwargs['deleted'] = False
elif 'only' == read_deleted:
query_kwargs['deleted'] = True
elif 'yes' == read_deleted:
pass
else:
raise ValueError(_("Unrecognized read_deleted value '%s'")
% read_deleted)
query = sqlalchemyutils.model_query(
model, context.session, args, **query_kwargs)
# We can't use oslo.db model_query's project_id here, as it doesn't allow
# us to return both our projects and unowned projects.
if nova.context.is_user_context(context) and project_only:
if project_only == 'allow_none':
query = query.\
filter(or_(model.project_id == context.project_id,
model.project_id == null()))
else:
query = query.filter_by(project_id=context.project_id)
return query
def convert_objects_related_datetimes(values, *datetime_keys):
if not datetime_keys:
datetime_keys = ('created_at', 'deleted_at', 'updated_at')
for key in datetime_keys:
if key in values and values[key]:
if isinstance(values[key], six.string_types):
try:
values[key] = timeutils.parse_strtime(values[key])
except ValueError:
# Try alternate parsing since parse_strtime will fail
# with say converting '2015-05-28T19:59:38+00:00'
values[key] = timeutils.parse_isotime(values[key])
# NOTE(danms): Strip UTC timezones from datetimes, since they're
# stored that way in the database
values[key] = values[key].replace(tzinfo=None)
return values
###################
def constraint(**conditions):
return Constraint(conditions)
def equal_any(*values):
return EqualityCondition(values)
def not_equal(*values):
return InequalityCondition(values)
class Constraint(object):
def __init__(self, conditions):
self.conditions = conditions
def apply(self, model, query):
for key, condition in self.conditions.items():
for clause in condition.clauses(getattr(model, key)):
query = query.filter(clause)
return query
class EqualityCondition(object):
def __init__(self, values):
self.values = values
def clauses(self, field):
# method signature requires us to return an iterable even if for OR
# operator this will actually be a single clause
return [or_(*[field == value for value in self.values])]
class InequalityCondition(object):
def __init__(self, values):
self.values = values
def clauses(self, field):
return [field != value for value in self.values]
class DeleteFromSelect(UpdateBase):
def __init__(self, table, select, column):
self.table = table
self.select = select
self.column = column
# NOTE(guochbo): some versions of MySQL doesn't yet support subquery with
# 'LIMIT & IN/ALL/ANY/SOME' We need work around this with nesting select .
@compiles(DeleteFromSelect)
def visit_delete_from_select(element, compiler, **kw):
return "DELETE FROM %s WHERE %s in (SELECT T1.%s FROM (%s) as T1)" % (
compiler.process(element.table, asfrom=True),
compiler.process(element.column),
element.column.name,
compiler.process(element.select))
###################
@pick_context_manager_writer
def service_destroy(context, service_id):
service = service_get(context, service_id)
model_query(context, models.Service).\
filter_by(id=service_id).\
soft_delete(synchronize_session=False)
# TODO(sbauza): Remove the service_id filter in a later release
# once we are sure that all compute nodes report the host field
model_query(context, models.ComputeNode).\
filter(or_(models.ComputeNode.service_id == service_id,
models.ComputeNode.host == service['host'])).\
soft_delete(synchronize_session=False)
@pick_context_manager_reader
def service_get(context, service_id):
query = model_query(context, models.Service).filter_by(id=service_id)
result = query.first()
if not result:
raise exception.ServiceNotFound(service_id=service_id)
return result
@pick_context_manager_reader
def service_get_by_uuid(context, service_uuid):
query = model_query(context, models.Service).filter_by(uuid=service_uuid)
result = query.first()
if not result:
raise exception.ServiceNotFound(service_id=service_uuid)
return result
@pick_context_manager_reader_allow_async
def service_get_minimum_version(context, binaries):
min_versions = context.session.query(
models.Service.binary,
func.min(models.Service.version)).\
filter(models.Service.binary.in_(binaries)).\
filter(models.Service.deleted == 0).\
filter(models.Service.forced_down == false()).\
group_by(models.Service.binary)
return dict(min_versions)
@pick_context_manager_reader
def service_get_all(context, disabled=None):
query = model_query(context, models.Service)
if disabled is not None:
query = query.filter_by(disabled=disabled)
return query.all()
@pick_context_manager_reader
def service_get_all_by_topic(context, topic):
return model_query(context, models.Service, read_deleted="no").\
filter_by(disabled=False).\
filter_by(topic=topic).\
all()
@pick_context_manager_reader
def service_get_by_host_and_topic(context, host, topic):
return model_query(context, models.Service, read_deleted="no").\
filter_by(disabled=False).\
filter_by(host=host).\
filter_by(topic=topic).\
first()
@pick_context_manager_reader
def service_get_all_by_binary(context, binary, include_disabled=False):
query = model_query(context, models.Service, read_deleted="no").\
filter_by(binary=binary)
if not include_disabled:
query = query.filter_by(disabled=False)
return query.all()
@pick_context_manager_reader
def service_get_all_computes_by_hv_type(context, hv_type,
include_disabled=False):
query = model_query(context, models.Service, read_deleted="no").\
filter_by(binary='nova-compute')
if not include_disabled:
query = query.filter_by(disabled=False)
query = query.join(models.ComputeNode,
models.Service.host == models.ComputeNode.host).\
filter(models.ComputeNode.hypervisor_type == hv_type).\
distinct('host')
return query.all()
@pick_context_manager_reader
def service_get_by_host_and_binary(context, host, binary):
result = model_query(context, models.Service, read_deleted="no").\
filter_by(host=host).\
filter_by(binary=binary).\
first()
if not result:
raise exception.HostBinaryNotFound(host=host, binary=binary)
return result
@pick_context_manager_reader
def service_get_all_by_host(context, host):
return model_query(context, models.Service, read_deleted="no").\
filter_by(host=host).\
all()
@pick_context_manager_reader_allow_async
def service_get_by_compute_host(context, host):
result = model_query(context, models.Service, read_deleted="no").\
filter_by(host=host).\
filter_by(binary='nova-compute').\
first()
if not result:
raise exception.ComputeHostNotFound(host=host)
return result
@pick_context_manager_writer
def service_create(context, values):
service_ref = models.Service()
service_ref.update(values)
# We only auto-disable nova-compute services since those are the only
# ones that can be enabled using the os-services REST API and they are
# the only ones where being disabled means anything. It does
# not make sense to be able to disable non-compute services like
# nova-scheduler or nova-osapi_compute since that does nothing.
if not CONF.enable_new_services and values.get('binary') == 'nova-compute':
msg = _("New compute service disabled due to config option.")
service_ref.disabled = True
service_ref.disabled_reason = msg
try:
service_ref.save(context.session)
except db_exc.DBDuplicateEntry as e:
if 'binary' in e.columns:
raise exception.ServiceBinaryExists(host=values.get('host'),
binary=values.get('binary'))
raise exception.ServiceTopicExists(host=values.get('host'),
topic=values.get('topic'))
return service_ref
@oslo_db_api.wrap_db_retry(max_retries=5, retry_on_deadlock=True)
@pick_context_manager_writer
def service_update(context, service_id, values):
service_ref = service_get(context, service_id)
# Only servicegroup.drivers.db.DbDriver._report_state() updates
# 'report_count', so if that value changes then store the timestamp
# as the last time we got a state report.
if 'report_count' in values:
if values['report_count'] > service_ref.report_count:
service_ref.last_seen_up = timeutils.utcnow()
service_ref.update(values)
return service_ref
###################
def _compute_node_select(context, filters=None, limit=None, marker=None):
if filters is None:
filters = {}
cn_tbl = sa.alias(models.ComputeNode.__table__, name='cn')
select = sa.select([cn_tbl])
if context.read_deleted == "no":
select = select.where(cn_tbl.c.deleted == 0)
if "compute_id" in filters:
select = select.where(cn_tbl.c.id == filters["compute_id"])
if "service_id" in filters:
select = select.where(cn_tbl.c.service_id == filters["service_id"])
if "host" in filters:
select = select.where(cn_tbl.c.host == filters["host"])
if "hypervisor_hostname" in filters:
hyp_hostname = filters["hypervisor_hostname"]
select = select.where(cn_tbl.c.hypervisor_hostname == hyp_hostname)
if "mapped" in filters:
select = select.where(cn_tbl.c.mapped < filters['mapped'])
if marker is not None:
try:
compute_node_get(context, marker)
except exception.ComputeHostNotFound:
raise exception.MarkerNotFound(marker=marker)
select = select.where(cn_tbl.c.id > marker)
if limit is not None:
select = select.limit(limit)
# Explicitly order by id, so we're not dependent on the native sort
# order of the underlying DB.
select = select.order_by(asc("id"))
return select
def _compute_node_fetchall(context, filters=None, limit=None, marker=None):
select = _compute_node_select(context, filters, limit=limit, marker=marker)
engine = get_engine(context=context)
conn = engine.connect()
results = conn.execute(select).fetchall()
# Callers expect dict-like objects, not SQLAlchemy RowProxy objects...
results = [dict(r) for r in results]
conn.close()
return results
@pick_context_manager_reader
def compute_node_get(context, compute_id):
results = _compute_node_fetchall(context, {"compute_id": compute_id})
if not results:
raise exception.ComputeHostNotFound(host=compute_id)
return results[0]
@pick_context_manager_reader
def compute_node_get_model(context, compute_id):
# TODO(edleafe): remove once the compute node resource provider migration
# is complete, and this distinction is no longer necessary.
result = model_query(context, models.ComputeNode).\
filter_by(id=compute_id).\
first()
if not result:
raise exception.ComputeHostNotFound(host=compute_id)
return result
@pick_context_manager_reader
def compute_nodes_get_by_service_id(context, service_id):
results = _compute_node_fetchall(context, {"service_id": service_id})
if not results:
raise exception.ServiceNotFound(service_id=service_id)
return results
@pick_context_manager_reader
def compute_node_get_by_host_and_nodename(context, host, nodename):
results = _compute_node_fetchall(context,
{"host": host, "hypervisor_hostname": nodename})
if not results:
raise exception.ComputeHostNotFound(host=host)
return results[0]
@pick_context_manager_reader_allow_async
def compute_node_get_all_by_host(context, host):
results = _compute_node_fetchall(context, {"host": host})
if not results:
raise exception.ComputeHostNotFound(host=host)
return results
@pick_context_manager_reader
def compute_node_get_all(context):
return _compute_node_fetchall(context)
@pick_context_manager_reader
def compute_node_get_all_mapped_less_than(context, mapped_less_than):
return _compute_node_fetchall(context,
{'mapped': mapped_less_than})
@pick_context_manager_reader
def compute_node_get_all_by_pagination(context, limit=None, marker=None):
return _compute_node_fetchall(context, limit=limit, marker=marker)
@pick_context_manager_reader
def compute_node_search_by_hypervisor(context, hypervisor_match):
field = models.ComputeNode.hypervisor_hostname
return model_query(context, models.ComputeNode).\
filter(field.like('%%%s%%' % hypervisor_match)).\
all()
@pick_context_manager_writer
def compute_node_create(context, values):
"""Creates a new ComputeNode and populates the capacity fields
with the most recent data.
"""
convert_objects_related_datetimes(values)
compute_node_ref = models.ComputeNode()
compute_node_ref.update(values)
compute_node_ref.save(context.session)
return compute_node_ref
@oslo_db_api.wrap_db_retry(max_retries=5, retry_on_deadlock=True)
@pick_context_manager_writer
def compute_node_update(context, compute_id, values):
"""Updates the ComputeNode record with the most recent data."""
compute_ref = compute_node_get_model(context, compute_id)
# Always update this, even if there's going to be no other
# changes in data. This ensures that we invalidate the
# scheduler cache of compute node data in case of races.
values['updated_at'] = timeutils.utcnow()
convert_objects_related_datetimes(values)
compute_ref.update(values)
return compute_ref
@pick_context_manager_writer
def compute_node_delete(context, compute_id):
"""Delete a ComputeNode record."""
result = model_query(context, models.ComputeNode).\
filter_by(id=compute_id).\
soft_delete(synchronize_session=False)
if not result:
raise exception.ComputeHostNotFound(host=compute_id)
@pick_context_manager_reader
def compute_node_statistics(context):
"""Compute statistics over all compute nodes."""
engine = get_engine(context=context)
services_tbl = models.Service.__table__
inner_sel = sa.alias(_compute_node_select(context), name='inner_sel')
# TODO(sbauza): Remove the service_id filter in a later release
# once we are sure that all compute nodes report the host field
j = sa.join(
inner_sel, services_tbl,
sql.and_(
sql.or_(
inner_sel.c.host == services_tbl.c.host,
inner_sel.c.service_id == services_tbl.c.id
),
services_tbl.c.disabled == false(),
services_tbl.c.binary == 'nova-compute',
services_tbl.c.deleted == 0
)
)
# NOTE(jaypipes): This COALESCE() stuff is temporary while the data
# migration to the new resource providers inventories and allocations
# tables is completed.
agg_cols = [
func.count().label('count'),
sql.func.sum(
inner_sel.c.vcpus
).label('vcpus'),
sql.func.sum(
inner_sel.c.memory_mb
).label('memory_mb'),
sql.func.sum(
inner_sel.c.local_gb
).label('local_gb'),
sql.func.sum(
inner_sel.c.vcpus_used
).label('vcpus_used'),
sql.func.sum(
inner_sel.c.memory_mb_used
).label('memory_mb_used'),
sql.func.sum(
inner_sel.c.local_gb_used
).label('local_gb_used'),
sql.func.sum(
inner_sel.c.free_ram_mb
).label('free_ram_mb'),
sql.func.sum(
inner_sel.c.free_disk_gb
).label('free_disk_gb'),
sql.func.sum(
inner_sel.c.current_workload
).label('current_workload'),
sql.func.sum(
inner_sel.c.running_vms
).label('running_vms'),
sql.func.sum(
inner_sel.c.disk_available_least
).label('disk_available_least'),
]
select = sql.select(agg_cols).select_from(j)
conn = engine.connect()
results = conn.execute(select).fetchone()
# Build a dict of the info--making no assumptions about result
fields = ('count', 'vcpus', 'memory_mb', 'local_gb', 'vcpus_used',
'memory_mb_used', 'local_gb_used', 'free_ram_mb', 'free_disk_gb',
'current_workload', 'running_vms', 'disk_available_least')
results = {field: int(results[idx] or 0)
for idx, field in enumerate(fields)}
conn.close()
return results
###################
@pick_context_manager_writer
def certificate_create(context, values):
certificate_ref = models.Certificate()
for (key, value) in values.items():
certificate_ref[key] = value
certificate_ref.save(context.session)
return certificate_ref
@pick_context_manager_reader
def certificate_get_all_by_project(context, project_id):
return model_query(context, models.Certificate, read_deleted="no").\
filter_by(project_id=project_id).\
all()
@pick_context_manager_reader
def certificate_get_all_by_user(context, user_id):
return model_query(context, models.Certificate, read_deleted="no").\
filter_by(user_id=user_id).\
all()
@pick_context_manager_reader
def certificate_get_all_by_user_and_project(context, user_id, project_id):
return model_query(context, models.Certificate, read_deleted="no").\
filter_by(user_id=user_id).\
filter_by(project_id=project_id).\
all()
###################
@require_context
@pick_context_manager_reader
def floating_ip_get(context, id):
try:
result = model_query(context, models.FloatingIp, project_only=True).\
filter_by(id=id).\
options(joinedload_all('fixed_ip.instance')).\
first()
if not result:
raise exception.FloatingIpNotFound(id=id)
except db_exc.DBError:
LOG.warning("Invalid floating IP ID %s in request", id)
raise exception.InvalidID(id=id)
return result
@require_context
@pick_context_manager_reader
def floating_ip_get_pools(context):
pools = []
for result in model_query(context, models.FloatingIp,
(models.FloatingIp.pool,)).distinct():
pools.append({'name': result[0]})
return pools
@require_context
@oslo_db_api.wrap_db_retry(max_retries=5, retry_on_deadlock=True)
@pick_context_manager_writer
def floating_ip_allocate_address(context, project_id, pool,
auto_assigned=False):
nova.context.authorize_project_context(context, project_id)
floating_ip_ref = model_query(context, models.FloatingIp,
read_deleted="no").\
filter_by(fixed_ip_id=None).\
filter_by(project_id=None).\
filter_by(pool=pool).\
first()
if not floating_ip_ref:
raise exception.NoMoreFloatingIps()
params = {'project_id': project_id, 'auto_assigned': auto_assigned}
rows_update = model_query(context, models.FloatingIp, read_deleted="no").\
filter_by(id=floating_ip_ref['id']).\
filter_by(fixed_ip_id=None).\
filter_by(project_id=None).\
filter_by(pool=pool).\
update(params, synchronize_session='evaluate')
if not rows_update:
LOG.debug('The row was updated in a concurrent transaction, '
'we will fetch another one')
raise db_exc.RetryRequest(exception.FloatingIpAllocateFailed())
return floating_ip_ref['address']
@require_context
@pick_context_manager_writer
def floating_ip_bulk_create(context, ips, want_result=True):
try:
tab = models.FloatingIp().__table__
context.session.execute(tab.insert(), ips)
except db_exc.DBDuplicateEntry as e:
raise exception.FloatingIpExists(address=e.value)
if want_result:
return model_query(context, models.FloatingIp).filter(
models.FloatingIp.address.in_(
[ip['address'] for ip in ips])).all()
def _ip_range_splitter(ips, block_size=256):
"""Yields blocks of IPs no more than block_size elements long."""
out = []
count = 0
for ip in ips:
out.append(ip['address'])
count += 1
if count > block_size - 1:
yield out
out = []
count = 0
if out:
yield out
@require_context
@pick_context_manager_writer
def floating_ip_bulk_destroy(context, ips):
project_id_to_quota_count = collections.defaultdict(int)
for ip_block in _ip_range_splitter(ips):
# Find any floating IPs that were not auto_assigned and
# thus need quota released.
query = model_query(context, models.FloatingIp).\
filter(models.FloatingIp.address.in_(ip_block)).\
filter_by(auto_assigned=False)
for row in query.all():
# The count is negative since we release quota by
# reserving negative quota.
project_id_to_quota_count[row['project_id']] -= 1
# Delete the floating IPs.
model_query(context, models.FloatingIp).\
filter(models.FloatingIp.address.in_(ip_block)).\
soft_delete(synchronize_session='fetch')
@require_context
@pick_context_manager_writer
def floating_ip_create(context, values):
floating_ip_ref = models.FloatingIp()
floating_ip_ref.update(values)
try:
floating_ip_ref.save(context.session)
except db_exc.DBDuplicateEntry:
raise exception.FloatingIpExists(address=values['address'])
return floating_ip_ref
def _floating_ip_count_by_project(context, project_id):
nova.context.authorize_project_context(context, project_id)
# TODO(tr3buchet): why leave auto_assigned floating IPs out?
return model_query(context, models.FloatingIp, read_deleted="no").\
filter_by(project_id=project_id).\
filter_by(auto_assigned=False).\
count()