From 8d6777df09c3dc441013a31f21cc50ab3b0f42a3 Mon Sep 17 00:00:00 2001 From: Billy O'Mahony Date: Fri, 29 May 2015 15:24:03 +0100 Subject: framework: Add reworked framework to repo This commit adds the vSwitch Integration Test Framework whose design, based off TOIT, is outlined in the HLD previously made availiable to the community for review. The design of this framework allows developers to add different implementations of components, specifically vSwitches, Traffic Generators, Metrics Collectors and VNFs, easily. The goal of this design is that all testcases should run regardless of what is "under the hood". This commit adds support for running the framework for a phy to phy RFC2544 testcase only. More testcases will be added by the community. vSwitches supported at this time: * Intel DPDK (r) accelerated OpenvSwitch Traffic Generators supported at this time: * IxNet - IxNetwork Implementation * Ixia - IxExplorer Implementation * Dummy - Manual Implementation Metrics Collectors supported at this time: * Linux Metrics No VNFs are supported at this time but the framework outlines how they should be integrated and provides APIs for them to adhere to. JIRA: VSPERF-27 Change-Id: I312e1a1199487ffee8f824be06cd97d4f793eee0 Signed-off-by: Stephen Finucane Signed-off-by: Meghan Halton Signed-off-by: Christopher Nolan Signed-off-by: Maryam Tahhan Signed-off-by: Ciara Loftus Signed-off-by: Mark Kavanagh Signed-off-by: Cian Ferriter Signed-off-by: Timo Puha Signed-off-by: Billy O'Mahony Signed-off-by: Michal Weglicki Signed-off-by: Rory Sexton Signed-off-by: Ian Stokes Signed-off-by: Kevin Traynor Signed-off-by: Dino Simeon Madarang Reviewed-by: Eugene Snider Reviewed-by: Aihua Li --- src/ovs/ofctl.py | 316 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 316 insertions(+) create mode 100644 src/ovs/ofctl.py (limited to 'src/ovs/ofctl.py') diff --git a/src/ovs/ofctl.py b/src/ovs/ofctl.py new file mode 100644 index 00000000..c6aaddc9 --- /dev/null +++ b/src/ovs/ofctl.py @@ -0,0 +1,316 @@ +# Copyright 2015 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 bridge for convenient use of ``ovs-vsctl`` and +``ovs-ofctl`` on it. + +Much of this code is based on ``ovs-lib.py`` from Open Stack: + +https://github.com/openstack/neutron/blob/6eac1dc99124ca024d6a69b3abfa3bc69c735667/neutron/agent/linux/ovs_lib.py +""" + +import os +import logging +import string + +from tools import tasks +from conf import settings + +_OVS_VSCTL_BIN = os.path.join(settings.getValue('OVS_DIR'), 'utilities', + 'ovs-vsctl') +_OVS_OFCTL_BIN = os.path.join(settings.getValue('OVS_DIR'), 'utilities', + 'ovs-ofctl') + +class OFBase(object): + """Add/remove/show datapaths using ``ovs-ofctl``. + """ + 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_vsctl(self, args, check_error=False): + """Run ``ovs-vsctl`` with supplied arguments. + + :param args: Arguments to pass to ``ovs-vsctl`` + :param check_error: Throw exception on error + + :return: None + """ + cmd = ['sudo', _OVS_VSCTL_BIN, '--timeout', str(self.timeout)] + args + return tasks.run_task( + cmd, self.logger, 'Running ovs-vsctl...', check_error) + + # datapath management + + def add_br(self, br_name='br0'): + """Add datapath. + + :param br_name: Name of bridge + + :return: Instance of :class OFBridge: + """ + self.logger.debug('add bridge') + self.run_vsctl(['add-br', br_name]) + + return OFBridge(br_name, self.timeout) + + def del_br(self, br_name='br0'): + """Delete datapath. + + :param br_name: Name of bridge + + :return: None + """ + self.logger.debug('delete bridge') + self.run_vsctl(['del-br', br_name]) + + +class OFBridge(OFBase): + """Control a bridge instance using ``ovs-vsctl`` and ``ovs-ofctl``. + """ + def __init__(self, br_name='br0', timeout=10): + """Initialise bridge. + + :param br_name: Bridge name + :param timeout: Timeout to be used for each command + + :returns: None + """ + super(OFBridge, self).__init__(timeout) + self.br_name = br_name + self._ports = {} + + # context manager + + def __enter__(self): + """Create datapath + + :returns: self + """ + return self + + def __exit__(self, type_, value, traceback): + """Remove datapath. + """ + if not traceback: + self.destroy() + + # helpers + + def run_ofctl(self, args, check_error=False): + """Run ``ovs-ofctl`` with supplied arguments. + + :param args: Arguments to pass to ``ovs-ofctl`` + :param check_error: Throw exception on error + + :return: None + """ + cmd = ['sudo', _OVS_OFCTL_BIN, '--timeout', str(self.timeout)] + args + return tasks.run_task( + cmd, self.logger, 'Running ovs-ofctl...', check_error) + + def create(self): + """Create bridge. + """ + self.logger.debug('create bridge') + self.add_br(self.br_name) + + def destroy(self): + """Destroy bridge. + """ + self.logger.debug('destroy bridge') + self.del_br(self.br_name) + + def reset(self): + """Reset bridge. + """ + self.logger.debug('reset bridge') + self.destroy() + self.create() + + # port management + + def add_port(self, port_name, params): + """Add port to bridge. + + :param port_name: Name of port + :param params: Additional list of parameters to add-port + + :return: OpenFlow port number for the port + """ + self.logger.debug('add port') + self.run_vsctl(['add-port', self.br_name, port_name]+params) + + # This is how port number allocation works currently + # This possibly will not work correctly if there are port deletions + # in between + of_port = len(self._ports) + 1 + self._ports[port_name] = (of_port, params) + return of_port + + def del_port(self, port_name): + """Remove port from bridge. + + :param port_name: Name of port + + :return: None + """ + self.logger.debug('delete port') + self.run_vsctl(['del-port', self.br_name, port_name]) + self._ports.pop(port_name) + + def set_db_attribute(self, table_name, record, column, value): + """Set database attribute. + + :param table_name: Name of table + :param record: Name of record + :param column: Name of column + :param value: Value to set + + :return: None + """ + self.logger.debug('set attribute') + self.run_vsctl(['set', table_name, record, '%s=%s' % (column, value)]) + + def get_ports(self): + """Get the ports of this bridge + + Structure of the returned ports dictionary is + 'portname': (openflow_port_number, extra_parameters) + + Example: + ports = { + 'dpdkport0': + (1, ['--', 'set', 'Interface', 'dpdkport0', 'type=dpdk']), + 'dpdkvhostport0': + (2, ['--', 'set', 'Interface', 'dpdkvhostport0', + 'type=dpdkvhost']) + } + + :return: Dictionary of ports + """ + return self._ports + + def clear_db_attribute(self, table_name, record, column): + """Clear database attribute. + + :param table_name: Name of table + :param record: Name of record + :param column: Name of column + + :return: None + """ + self.logger.debug('clear attribute') + self.run_vsctl(['clear', table_name, record, column]) + + # flow mangement + + def add_flow(self, flow): + """Add flow to bridge. + + :param flow: Flow description as a dictionary + For flow dictionary structure, see function flow_key + + :return: None + """ + if not flow.get('actions'): + self.logger.error('add flow requires actions') + return + + self.logger.debug('add flow') + _flow_key = flow_key(flow) + self.logger.debug('key : %s', _flow_key) + self.run_ofctl(['add-flow', self.br_name, _flow_key]) + + def del_flow(self, flow): + """Delete flow from bridge. + + :param flow: Flow description as a dictionary + For flow dictionary structure, see function flow_key + flow=None will delete all flows + + :return: None + """ + self.logger.debug('delete flow') + _flow_key = flow_key(flow) + self.logger.debug('key : %s', _flow_key) + self.run_ofctl(['del-flows', self.br_name, _flow_key]) + + def del_flows(self): + """Delete all flows from bridge. + """ + self.logger.debug('delete flows') + self.run_ofctl(['del-flows', self.br_name]) + + def dump_flows(self): + """Dump all flows from bridge. + """ + self.logger.debug('dump flows') + self.run_ofctl(['dump-flows', self.br_name]) + +# +# helper functions +# + +def flow_key(flow): + """Model a flow key string for ``ovs-ofctl``. + + Syntax taken from ``ovs-ofctl`` manpages: + http://openvswitch.org/cgi-bin/ovsman.cgi?page=utilities%2Fovs-ofctl.8 + + Example flow dictionary: + flow = { + 'in_port': '1', + 'idle_timeout': '0', + 'actions': ['output:3'] + } + + :param flow: Flow description as a dictionary + + :return: String + :rtype: str + """ + _flow_add_key = string.Template('${fields},action=${actions}') + _flow_del_key = string.Template('${fields}') + + field_params = [] + + user_params = (x for x in list(flow.items()) if x[0] != 'actions') + for (key, default) in user_params: + field_params.append('%(field)s=%(value)s' % + {'field': key, 'value': default}) + + field_params = ','.join(field_params) + + _flow_key_param = { + 'fields': field_params, + } + + # no actions == delete key + if 'actions' in flow: + _flow_key_param['actions'] = ','.join(flow['actions']) + + flow_str = _flow_add_key.substitute(_flow_key_param) + else: + flow_str = _flow_del_key.substitute(_flow_key_param) + + return flow_str -- cgit 1.2.3-korg