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OpenStack Study: nosdriver.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # # Copyright 2013 Brocade Communications System, Inc. # 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. # # Authors: # Varma Bhupatiraju (vbhupati@#brocade.com) # Shiv Haris (sharis@brocade.com) """Brocade NOS Driver implements NETCONF over SSHv2 for Neutron network life-cycle management. """ from ncclient import manager from neutron.openstack.common import excutils from neutron.openstack.common import log as logging from neutron.plugins.brocade.nos import nctemplates as template LOG = logging.getLogger(__name__) SSH_PORT = 22
**** CubicPower OpenStack Study **** def nos_unknown_host_cb(host, fingerprint): """An unknown host callback. Returns `True` if it finds the key acceptable, and `False` if not. This default callback for NOS always returns 'True' (i.e. trusts all hosts for now). """ return True
**** CubicPower OpenStack Study **** class NOSdriver(): """NOS NETCONF interface driver for Neutron network. Handles life-cycle management of Neutron network (leverages AMPP on NOS) """
**** CubicPower OpenStack Study **** def __init__(self): self.mgr = None
**** CubicPower OpenStack Study **** def connect(self, host, username, password): """Connect via SSH and initialize the NETCONF session.""" # Use the persisted NETCONF connection if self.mgr and self.mgr.connected: return self.mgr # Open new NETCONF connection try: self.mgr = manager.connect(host=host, port=SSH_PORT, username=username, password=password, unknown_host_cb=nos_unknown_host_cb) except Exception as e: with excutils.save_and_reraise_exception(): LOG.error(_("Connect failed to switch: %s"), e) LOG.debug(_("Connect success to host %(host)s:%(ssh_port)d"), dict(host=host, ssh_port=SSH_PORT)) return self.mgr
**** CubicPower OpenStack Study **** def close_session(self): """Close NETCONF session.""" if self.mgr: self.mgr.close_session() self.mgr = None
**** CubicPower OpenStack Study **** def create_network(self, host, username, password, net_id): """Creates a new virtual network.""" name = template.OS_PORT_PROFILE_NAME.format(id=net_id) try: mgr = self.connect(host, username, password) self.create_vlan_interface(mgr, net_id) self.create_port_profile(mgr, name) self.create_vlan_profile_for_port_profile(mgr, name) self.configure_l2_mode_for_vlan_profile(mgr, name) self.configure_trunk_mode_for_vlan_profile(mgr, name) self.configure_allowed_vlans_for_vlan_profile(mgr, name, net_id) self.activate_port_profile(mgr, name) except Exception as ex: with excutils.save_and_reraise_exception(): LOG.exception(_("NETCONF error: %s"), ex) self.close_session()
**** CubicPower OpenStack Study **** def delete_network(self, host, username, password, net_id): """Deletes a virtual network.""" name = template.OS_PORT_PROFILE_NAME.format(id=net_id) try: mgr = self.connect(host, username, password) self.deactivate_port_profile(mgr, name) self.delete_port_profile(mgr, name) self.delete_vlan_interface(mgr, net_id) except Exception as ex: with excutils.save_and_reraise_exception(): LOG.exception(_("NETCONF error: %s"), ex) self.close_session()
**** CubicPower OpenStack Study **** def associate_mac_to_network(self, host, username, password, net_id, mac): """Associates a MAC address to virtual network.""" name = template.OS_PORT_PROFILE_NAME.format(id=net_id) try: mgr = self.connect(host, username, password) self.associate_mac_to_port_profile(mgr, name, mac) except Exception as ex: with excutils.save_and_reraise_exception(): LOG.exception(_("NETCONF error: %s"), ex) self.close_session()
**** CubicPower OpenStack Study **** def dissociate_mac_from_network(self, host, username, password, net_id, mac): """Dissociates a MAC address from virtual network.""" name = template.OS_PORT_PROFILE_NAME.format(id=net_id) try: mgr = self.connect(host, username, password) self.dissociate_mac_from_port_profile(mgr, name, mac) except Exception as ex: with excutils.save_and_reraise_exception(): LOG.exception(_("NETCONF error: %s"), ex) self.close_session()
**** CubicPower OpenStack Study **** def create_vlan_interface(self, mgr, vlan_id): """Configures a VLAN interface.""" confstr = template.CREATE_VLAN_INTERFACE.format(vlan_id=vlan_id) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def delete_vlan_interface(self, mgr, vlan_id): """Deletes a VLAN interface.""" confstr = template.DELETE_VLAN_INTERFACE.format(vlan_id=vlan_id) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def get_port_profiles(self, mgr): """Retrieves all port profiles.""" filterstr = template.PORT_PROFILE_XPATH_FILTER response = mgr.get_config(source='running', filter=('xpath', filterstr)).data_xml return response
**** CubicPower OpenStack Study **** def get_port_profile(self, mgr, name): """Retrieves a port profile.""" filterstr = template.PORT_PROFILE_NAME_XPATH_FILTER.format(name=name) response = mgr.get_config(source='running', filter=('xpath', filterstr)).data_xml return response
**** CubicPower OpenStack Study **** def create_port_profile(self, mgr, name): """Creates a port profile.""" confstr = template.CREATE_PORT_PROFILE.format(name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def delete_port_profile(self, mgr, name): """Deletes a port profile.""" confstr = template.DELETE_PORT_PROFILE.format(name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def activate_port_profile(self, mgr, name): """Activates a port profile.""" confstr = template.ACTIVATE_PORT_PROFILE.format(name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def deactivate_port_profile(self, mgr, name): """Deactivates a port profile.""" confstr = template.DEACTIVATE_PORT_PROFILE.format(name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def associate_mac_to_port_profile(self, mgr, name, mac_address): """Associates a MAC address to a port profile.""" confstr = template.ASSOCIATE_MAC_TO_PORT_PROFILE.format( name=name, mac_address=mac_address) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def dissociate_mac_from_port_profile(self, mgr, name, mac_address): """Dissociates a MAC address from a port profile.""" confstr = template.DISSOCIATE_MAC_FROM_PORT_PROFILE.format( name=name, mac_address=mac_address) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def create_vlan_profile_for_port_profile(self, mgr, name): """Creates VLAN sub-profile for port profile.""" confstr = template.CREATE_VLAN_PROFILE_FOR_PORT_PROFILE.format( name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def configure_l2_mode_for_vlan_profile(self, mgr, name): """Configures L2 mode for VLAN sub-profile.""" confstr = template.CONFIGURE_L2_MODE_FOR_VLAN_PROFILE.format( name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def configure_trunk_mode_for_vlan_profile(self, mgr, name): """Configures trunk mode for VLAN sub-profile.""" confstr = template.CONFIGURE_TRUNK_MODE_FOR_VLAN_PROFILE.format( name=name) mgr.edit_config(target='running', config=confstr)
**** CubicPower OpenStack Study **** def configure_allowed_vlans_for_vlan_profile(self, mgr, name, vlan_id): """Configures allowed VLANs for VLAN sub-profile.""" confstr = template.CONFIGURE_ALLOWED_VLANS_FOR_VLAN_PROFILE.format( name=name, vlan_id=vlan_id) mgr.edit_config(target='running', config=confstr)
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