# 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.
import abc
import eventlet
from dao.common import config
from dao.common import log
opts = [config.StrOpt('dhcp', 'driver',
default='dao.control.worker.dhcp.neutron.NeutronHelper',
help='Path to DHCP helper')
]
config.register(opts)
CONF = config.get_config()
logger = log.getLogger(__name__)
class DHCPBase(object):
instance = None
@classmethod
def get_helper(cls, worker=None):
"""
:rtype: DHCPBase
"""
if cls.instance:
return cls.instance
cfg.IntOpt('db', 'sql_retry_interval',
default=10,
help='interval between retries of opening a sql connection'),
cfg.IntOpt('db', 'sql_max_overflow',
default=None,
help='If set, use this value for max_overflow with sqlalchemy'),
cfg.IntOpt('db', 'sql_connection_debug',
default=0,
help='Verbosity of SQL debugging information. 0=None, '
'100=Everything'),
cfg.BoolOpt('db', 'sql_connection_trace',
default=False,
help='Add python stack traces to SQL as comment strings'),
]
cfg.register(sql_opts)
CONF = cfg.get_config()
LOG = log.getLogger(__name__)
_ENGINE = None
_MAKER = None
def greenthread_yield(dbapi_con, con_record):
"""
Ensure other greenthreads get a chance to execute by forcing a context
switch. With common database backends (eg MySQLdb and sqlite), there is
no implicit yield caused by network I/O since they are implemented by
C libraries that eventlet cannot monkey patch.
"""
eventlet.sleep(0)
from dao.common import log
from dao.common import utils
from dao.dhcp.db import api
from dao.dhcp import base
opts = [
config.StrOpt('dhcp',
'leases_dir',
'/etc/dhcp/conf.d',
help='Path to the directory with static leases'),
config.IntOpt('dhcp',
'restart_delay',
default=4,
help='Delay before restarting dhcp')
]
config.register(opts)
CONF = config.get_config()
LOG = log.getLogger(__name__)
Subnet = base.Subnet
class DHCPController(object):
pending_restarts = False
@classmethod
def enable(cls):
if cls.pending_restarts:
return
cls.pending_restarts = True
cfg.IntOpt('db',
'sql_max_overflow',
default=None,
help='If set, use this value for max_overflow with sqlalchemy'),
cfg.IntOpt('db',
'sql_connection_debug',
default=0,
help='Verbosity of SQL debugging information. 0=None, '
'100=Everything'),
cfg.BoolOpt('db',
'sql_connection_trace',
default=False,
help='Add python stack traces to SQL as comment strings'),
]
cfg.register(sql_opts)
CONF = cfg.get_config()
LOG = log.getLogger(__name__)
_ENGINE = None
_MAKER = None
def greenthread_yield(dbapi_con, con_record):
"""
Ensure other greenthreads get a chance to execute by forcing a context
switch. With common database backends (eg MySQLdb and sqlite), there is
no implicit yield caused by network I/O since they are implemented by
C libraries that eventlet cannot monkey patch.
"""
eventlet.sleep(0)
