295 lines
11 KiB
Python
295 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import glob
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import logging
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import os
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import os_net_config
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from os_net_config import objects
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from os_net_config import utils
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from os_net_config.openstack.common import processutils
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logger = logging.getLogger(__name__)
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def ifcfg_config_path(name):
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return "/etc/sysconfig/network-scripts/ifcfg-%s" % name
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#NOTE(dprince): added here for testability
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def bridge_config_path(name):
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return ifcfg_config_path(name)
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def route_config_path(name):
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return "/etc/sysconfig/network-scripts/route-%s" % name
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def cleanup_pattern():
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return "/etc/sysconfig/network-scripts/ifcfg-*"
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class IfcfgNetConfig(os_net_config.NetConfig):
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"""Configure network interfaces using the ifcfg format."""
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def __init__(self):
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self.interface_data = {}
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self.route_data = {}
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self.bridge_data = {}
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self.member_names = {}
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logger.info('Ifcfg net config provider created.')
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def child_members(self, name):
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children = set()
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try:
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for member in self.member_names[name]:
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children.add(member)
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children.update(self.child_members(member))
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except KeyError:
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children.add(name)
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return children
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def _add_common(self, base_opt):
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ovs_extra = []
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data = "DEVICE=%s\n" % base_opt.name
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data += "ONBOOT=yes\n"
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data += "HOTPLUG=no\n"
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if isinstance(base_opt, objects.Vlan):
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data += "VLAN=yes\n"
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if base_opt.device:
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data += "PHYSDEV=%s\n" % base_opt.device
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if base_opt.ovs_port:
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data += "DEVICETYPE=ovs\n"
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if base_opt.bridge_name:
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if isinstance(base_opt, objects.Vlan):
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data += "TYPE=OVSIntPort\n"
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data += "OVS_BRIDGE=%s\n" % base_opt.bridge_name
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data += "OVS_OPTIONS=\"tag=%s\"\n" % base_opt.vlan_id
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else:
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data += "TYPE=OVSPort\n"
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data += "OVS_BRIDGE=%s\n" % base_opt.bridge_name
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if isinstance(base_opt, objects.OvsBridge):
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data += "DEVICETYPE=ovs\n"
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data += "TYPE=OVSBridge\n"
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if base_opt.use_dhcp:
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data += "OVSBOOTPROTO=dhcp\n"
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if base_opt.members:
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members = [member.name for member in base_opt.members]
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self.member_names[base_opt.name] = members
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data += ("OVSDHCPINTERFACES=\"%s\"\n" % " ".join(members))
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if base_opt.primary_interface_name:
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mac = utils.interface_mac(base_opt.primary_interface_name)
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ovs_extra.append("set bridge %s other-config:hwaddr=%s" %
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(base_opt.name, mac))
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if base_opt.ovs_options:
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data += "OVS_OPTIONS=\"%s\"\n" % base_opt.ovs_options
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ovs_extra.extend(base_opt.ovs_extra)
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elif isinstance(base_opt, objects.OvsBond):
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data += "DEVICETYPE=ovs\n"
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data += "TYPE=OVSBond\n"
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if base_opt.use_dhcp:
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data += "OVSBOOTPROTO=dhcp\n"
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if base_opt.members:
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members = [member.name for member in base_opt.members]
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self.member_names[base_opt.name] = members
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data += ("BOND_IFACES=\"%s\"\n" % " ".join(members))
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if base_opt.ovs_options:
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data += "OVS_OPTIONS=\"%s\"\n" % base_opt.ovs_options
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ovs_extra.extend(base_opt.ovs_extra)
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else:
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if base_opt.use_dhcp:
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data += "BOOTPROTO=dhcp\n"
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elif not base_opt.addresses:
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data += "BOOTPROTO=none\n"
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if base_opt.mtu != 1500:
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data += "MTU=%i\n" % base_opt.mtu
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if base_opt.use_dhcpv6 or base_opt.v6_addresses():
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data += "IPV6INIT=yes\n"
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if base_opt.mtu != 1500:
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data += "IPV6_MTU=%i\n" % base_opt.mtu
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if base_opt.use_dhcpv6:
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data += "DHCPV6C=yes\n"
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elif base_opt.addresses:
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#TODO(dprince): Do we want to support multiple addresses?
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v4_addresses = base_opt.v4_addresses()
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if v4_addresses:
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first_v4 = v4_addresses[0]
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data += "BOOTPROTO=static\n"
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data += "IPADDR=%s\n" % first_v4.ip
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data += "NETMASK=%s\n" % first_v4.netmask
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v6_addresses = base_opt.v6_addresses()
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if v6_addresses:
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first_v6 = v6_addresses[0]
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data += "IPV6_AUTOCONF=no\n"
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data += "IPV6ADDR=%s\n" % first_v6.ip
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if ovs_extra:
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data += "OVS_EXTRA=\"%s\"\n" % " -- ".join(ovs_extra)
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return data
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def _add_routes(self, interface_name, routes=[]):
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logger.info('adding custom route for interface: %s' % interface_name)
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data = ""
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first_line = ""
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for route in routes:
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if route.default:
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first_line = "default via %s dev %s\n" % (route.next_hop,
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interface_name)
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else:
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data += "%s via %s dev %s\n" % (route.ip_netmask,
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route.next_hop,
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interface_name)
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self.route_data[interface_name] = first_line + data
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logger.debug('route data: %s' % self.route_data[interface_name])
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def add_interface(self, interface):
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"""Add an Interface object to the net config object.
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:param interface: The Interface object to add.
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"""
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logger.info('adding interface: %s' % interface.name)
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data = self._add_common(interface)
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logger.debug('interface data: %s' % data)
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self.interface_data[interface.name] = data
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if interface.routes:
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self._add_routes(interface.name, interface.routes)
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def add_vlan(self, vlan):
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"""Add a Vlan object to the net config object.
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:param vlan: The vlan object to add.
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"""
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logger.info('adding vlan: %s' % vlan.name)
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data = self._add_common(vlan)
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logger.debug('vlan data: %s' % data)
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self.interface_data[vlan.name] = data
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if vlan.routes:
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self._add_routes(vlan.name, vlan.routes)
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def add_bridge(self, bridge):
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"""Add an OvsBridge object to the net config object.
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:param bridge: The OvsBridge object to add.
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"""
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logger.info('adding bridge: %s' % bridge.name)
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data = self._add_common(bridge)
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logger.debug('bridge data: %s' % data)
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self.bridge_data[bridge.name] = data
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if bridge.routes:
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self._add_routes(bridge.name, bridge.routes)
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def add_bond(self, bond):
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"""Add an OvsBond object to the net config object.
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:param bridge: The OvsBond object to add.
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"""
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logger.info('adding bond: %s' % bond.name)
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data = self._add_common(bond)
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logger.debug('bond data: %s' % data)
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self.interface_data[bond.name] = data
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if bond.routes:
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self._add_routes(bond.name, bond.routes)
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def apply(self, noop=False, cleanup=False):
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"""Apply the network configuration.
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:param noop: A boolean which indicates whether this is a no-op.
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:param cleanup: A boolean which indicates whether any undefined
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(existing but not present in the object model) interface
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should be disabled and deleted.
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:returns: a dict of the format: filename/data which contains info
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for each file that was changed (or would be changed if in --noop
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mode).
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"""
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logger.info('applying network configs...')
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restart_interfaces = []
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restart_bridges = []
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update_files = {}
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all_file_names = []
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for interface_name, iface_data in self.interface_data.iteritems():
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route_data = self.route_data.get(interface_name, '')
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interface_path = ifcfg_config_path(interface_name)
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route_path = route_config_path(interface_name)
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all_file_names.append(interface_path)
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all_file_names.append(route_path)
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if (utils.diff(interface_path, iface_data) or
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utils.diff(route_path, route_data)):
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restart_interfaces.append(interface_name)
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restart_interfaces.extend(self.child_members(interface_name))
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update_files[interface_path] = iface_data
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update_files[route_path] = route_data
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logger.info('No changes required for interface: %s' %
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interface_name)
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for bridge_name, bridge_data in self.bridge_data.iteritems():
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route_data = self.route_data.get(bridge_name, '')
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bridge_path = bridge_config_path(bridge_name)
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bridge_route_path = route_config_path(bridge_name)
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all_file_names.append(bridge_path)
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all_file_names.append(bridge_route_path)
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if (utils.diff(bridge_path, bridge_data) or
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utils.diff(bridge_route_path, route_data)):
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restart_bridges.append(bridge_name)
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restart_interfaces.extend(self.child_members(bridge_name))
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update_files[bridge_path] = bridge_data
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update_files[bridge_route_path] = route_data
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logger.info('No changes required for bridge: %s' % bridge_name)
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if noop:
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return update_files
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if cleanup:
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for ifcfg_file in glob.iglob(cleanup_pattern()):
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if ifcfg_file not in all_file_names:
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interface_name = ifcfg_file[len(cleanup_pattern()) - 1:]
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if interface_name != 'lo':
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logger.info('cleaning up interface: %s' %
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interface_name)
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processutils.execute('/sbin/ifdown', interface_name,
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check_exit_code=False)
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os.remove(ifcfg_file)
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for interface in restart_interfaces:
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logger.info('running ifdown on interface: %s' % interface)
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processutils.execute('/sbin/ifdown', interface,
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check_exit_code=False)
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for bridge in restart_bridges:
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logger.info('running ifdown on bridge: %s' % bridge)
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processutils.execute('/sbin/ifdown', bridge,
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check_exit_code=False)
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for location, data in update_files.iteritems():
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logger.info('writing config file: %s' % location)
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utils.write_config(location, data)
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for bridge in restart_bridges:
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logger.info('running ifup on bridge: %s' % bridge)
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processutils.execute('/sbin/ifup', bridge)
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for interface in restart_interfaces:
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logger.info('running ifup on interface: %s' % interface)
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processutils.execute('/sbin/ifup', interface)
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return update_files
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