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#!/usr/bin/python
# Copyright 2018 Google 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.
"""Utilities that are distro specific for use on SUSE 12."""
import os
import subprocess
from google_compute_engine import constants
from google_compute_engine.distro_lib import helpers
from google_compute_engine.distro_lib import ip_forwarding_utils
from google_compute_engine.distro_lib import utils
class Utils(utils.Utils):
"""Utilities used by Linux guest services on SUSE 12."""
network_path = constants.LOCALBASE + '/etc/sysconfig/network'
def EnableIpv6(self, interfaces, logger, dhclient_script=None):
"""Configure the network interfaces for IPv6 using dhclient.
Args:
interface: string, the output device names for enabling IPv6.
logger: logger object, used to write to SysLog and serial port.
dhclient_script: string, the path to a dhclient script used by dhclient.
"""
pass
def DisableIpv6(self, interfaces, logger):
"""Disable Ipv6.
Args:
interface: string, the output device names for enabling IPv6.
logger: logger object, used to write to SysLog and serial port.
"""
pass
def EnableNetworkInterfaces(self, interfaces, logger, dhclient_script=None):
"""Enable the list of network interfaces.
Args:
interfaces: list of string, the output device names to enable.
logger: logger object, used to write to SysLog and serial port.
dhclient_script: string, the path to a dhclient script used by dhclient.
"""
interfaces_to_up = [i for i in interfaces if i != 'eth0']
if interfaces_to_up:
logger.info('Enabling the Ethernet interfaces %s.', interfaces_to_up)
self._WriteIfcfg(interfaces_to_up, logger)
self._Ifup(interfaces_to_up, logger)
def _WriteIfcfg(self, interfaces, logger):
"""Write ifcfg files for multi-NIC support.
Overwrites the files. This allows us to update ifcfg-* in the future.
Disable the network setup to override this behavior and customize the
configurations.
Args:
interfaces: list of string, the output device names to enable.
logger: logger object, used to write to SysLog and serial port.
"""
for interface in interfaces:
interface_config = os.path.join(
self.network_path, 'ifcfg-%s' % interface)
interface_content = [
'# Added by Google.',
'STARTMODE=hotplug',
'BOOTPROTO=dhcp',
'DHCLIENT_SET_DEFAULT_ROUTE=yes',
'DHCLIENT_ROUTE_PRIORITY=10%s00' % interface,
'',
]
with open(interface_config, 'w') as interface_file:
interface_file.write('\n'.join(interface_content))
logger.info('Created ifcfg file for interface %s.', interface)
def _Ifup(self, interfaces, logger):
"""Activate network interfaces.
Args:
interfaces: list of string, the output device names to enable.
logger: logger object, used to write to SysLog and serial port.
"""
ifup = ['/usr/sbin/wicked', 'ifup', '--timeout', '1']
try:
subprocess.check_call(ifup + interfaces)
except subprocess.CalledProcessError:
logger.warning('Could not activate interfaces %s.', interfaces)
def HandleClockSync(self, logger):
"""Sync the software clock with the hypervisor clock.
Args:
logger: logger object, used to write to SysLog and serial port.
"""
helpers.CallHwclock(logger)
def IpForwardingUtils(self, logger, proto_id=None):
"""Get system IP address configuration utilities.
Args:
logger: logger object, used to write to SysLog and serial port.
proto_id: string, the routing protocol identifier for Google IP changes.
"""
return ip_forwarding_utils.IpForwardingUtilsIproute(logger, proto_id)
def RestartNetworking(self, logger):
"""Restart the networking service to force a DHCP refresh.
Args:
logger: logger object, used to write to SysLog and serial port.
"""
helpers.SystemctlRestart('wickedd-nanny', logger)
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