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# Copyright 2016-2017 Intel Corporation.
#
# 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.
"""Wrapper for an OVS dpctl (``ovs-dpctl``) for managing datapaths.
"""
import logging
from tools import tasks
from conf import settings
_OVS_LOCAL_DATAPATH = 'ovs-system'
class DPCtl(object):
"""remove/show datapaths using ``ovs-dpctl``.
"""
def __init__(self, timeout=10):
"""Initialise logger.
:param timeout: Timeout to be used for each command
:returns: None
"""
self.logger = logging.getLogger(__name__)
self.timeout = timeout
# helpers
def run_dpctl(self, args, check_error=False):
"""Run ``ovs-dpctl`` with supplied arguments.
:param args: Arguments to pass to ``ovs-dpctl``
:param check_error: Throw exception on error
:return: None
"""
cmd = ['sudo', settings.getValue('TOOLS')['ovs-dpctl'],
'--timeout',
str(self.timeout)] + args
return tasks.run_task(
cmd, self.logger, 'Running ovs-dpctl ..', check_error)
# datapath management
def del_dp(self, dp_name=_OVS_LOCAL_DATAPATH):
"""Delete local datapath (ovs-dpctl).
:param br_name: Name of bridge
:return: None
"""
self.logger.debug('delete datapath %s', dp_name)
self.run_dpctl(['del-dp', dp_name])
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