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# -*- coding: utf-8 -*-
# Copyright 2014 Red Hat, Inc.
#
# 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.
import logging
import os
from oslo_concurrency import processutils
from os_net_config import objects
from os_net_config import utils
logger = logging.getLogger(__name__)
class NotImplemented(Exception):
pass
class NetConfig(object):
"""Configure network interfaces using the ifcfg format."""
def __init__(self, noop=False):
self.noop = noop
self.log_prefix = "NOOP: " if noop else ""
def add_object(self, obj):
"""Convenience method to add any type of object to the network config.
See objects.py.
:param obj: The object to add.
"""
if isinstance(obj, objects.Interface):
self.add_interface(obj)
elif isinstance(obj, objects.Vlan):
self.add_vlan(obj)
elif isinstance(obj, objects.OvsBridge):
self.add_bridge(obj)
for member in obj.members:
self.add_object(member)
elif isinstance(obj, objects.OvsBond):
self.add_bond(obj)
for member in obj.members:
self.add_object(member)
def add_interface(self, interface):
"""Add an Interface object to the net config object.
:param interface: The Interface object to add.
"""
raise NotImplemented("add_interface is not implemented.")
def add_vlan(self, vlan):
"""Add a Vlan object to the net config object.
:param vlan: The vlan object to add.
"""
raise NotImplemented("add_vlan is not implemented.")
def add_bridge(self, bridge):
"""Add an OvsBridge object to the net config object.
:param bridge: The OvsBridge object to add.
"""
raise NotImplemented("add_bridge is not implemented.")
def add_bond(self, bond):
"""Add an OvsBond object to the net config object.
:param bridge: The OvsBond object to add.
"""
raise NotImplemented("add_bond is not implemented.")
def apply(self, cleanup=False):
"""Apply the network configuration.
:param cleanup: A boolean which indicates whether any undefined
(existing but not present in the object model) interfaces
should be disabled and deleted.
:returns: a dict of the format: filename/data which contains info
for each file that was changed (or would be changed if in --noop
mode).
"""
raise NotImplemented("apply is not implemented.")
def execute(self, msg, cmd, *args, **kwargs):
"""Print a message and run a command.
Print a message and run a command with processutils
in noop mode, this just prints a message.
"""
logger.info('%s%s' % (self.log_prefix, msg))
if not self.noop:
processutils.execute(cmd, *args, **kwargs)
def write_config(self, filename, data, msg=None):
msg = msg or "Writing config %s" % filename
logger.info('%s%s' % (self.log_prefix, msg))
if not self.noop:
utils.write_config(filename, data)
def remove_config(self, filename, msg=None):
msg = msg or "Removing config %s" % filename
logger.info('%s%s' % (self.log_prefix, msg))
if not self.noop:
os.remove(filename)
def ifdown(self, interface, iftype='interface'):
msg = 'running ifdown on %s: %s' % (iftype, interface)
self.execute(msg, '/sbin/ifdown', interface, check_exit_code=False)
def ifup(self, interface, iftype='interface'):
msg = 'running ifup on %s: %s' % (iftype, interface)
self.execute(msg, '/sbin/ifup', interface)
def ifrename(self, oldname, newname):
msg = 'renaming %s to %s: ' % (oldname, newname)
# ifdown isn't enough when renaming, we need the link down
for name in (oldname, newname):
if utils._is_active_nic(name):
self.execute(msg, '/sbin/ip',
'link', 'set', 'dev', name, 'down')
self.execute(msg, '/sbin/ip',
'link', 'set', 'dev', name, 'link', 'down')
self.execute(msg, '/sbin/ip',
'link', 'set', 'dev', oldname, 'name', newname)
self.execute(msg, '/sbin/ip',
'link', 'set', 'dev', newname, 'up')
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