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# -*- coding: utf-8 -*-
# Copyright 2014-2015 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 argparse
import logging
import os
import sys
import yaml
from os_net_config import impl_eni
from os_net_config import impl_ifcfg
from os_net_config import impl_iproute
from os_net_config import objects
from os_net_config import validator
from os_net_config import version
logger = logging.getLogger(__name__)
def parse_opts(argv):
parser = argparse.ArgumentParser(
description='Configure host network interfaces using a JSON'
' config file format.')
parser.add_argument('-c', '--config-file', metavar='CONFIG_FILE',
help="""path to the configuration file.""",
default='/etc/os-net-config/config.yaml')
parser.add_argument('-m', '--mapping-file', metavar='MAPPING_FILE',
help="""path to the interface mapping file.""",
default='/etc/os-net-config/mapping.yaml')
parser.add_argument('-p', '--provider', metavar='PROVIDER',
help="""The provider to use."""
"""One of: ifcfg, eni, iproute.""",
default=None)
parser.add_argument('-r', '--root-dir', metavar='ROOT_DIR',
help="""The root directory of the filesystem.""",
default='')
parser.add_argument('--detailed-exit-codes',
action='store_true',
help="""Enable detailed exit codes. """
"""If enabled an exit code of '2' means """
"""that files were modified."""
"""Disabled by default.""",
default=False)
parser.add_argument(
'--exit-on-validation-errors',
action='store_true',
help="Exit with an error if configuration file validation fails. "
"Without this option, just log a warning and continue.",
default=False)
parser.add_argument(
'-d', '--debug',
dest="debug",
action='store_true',
help="Print debugging output.",
required=False)
parser.add_argument(
'-v', '--verbose',
dest="verbose",
action='store_true',
help="Print verbose output.",
required=False)
parser.add_argument('--version', action='version',
version=version.version_info.version_string())
parser.add_argument(
'--noop',
dest="noop",
action='store_true',
help="Return the configuration commands, without applying them.",
required=False)
parser.add_argument(
'--no-activate',
dest="no_activate",
action='store_true',
help="Install the configuration but don't start/stop interfaces.",
required=False)
parser.add_argument(
'--cleanup',
dest="cleanup",
action='store_true',
help="Cleanup unconfigured interfaces.",
required=False)
parser.add_argument(
'--persist-mapping',
dest="persist_mapping",
action='store_true',
help="Make aliases defined in the mapping file permanent "
"(WARNING, permanently renames nics).",
required=False)
opts = parser.parse_args(argv[1:])
return opts
def configure_logger(verbose=False, debug=False):
LOG_FORMAT = '[%(asctime)s] [%(levelname)s] %(message)s'
DATE_FORMAT = '%Y/%m/%d %I:%M:%S %p'
log_level = logging.WARN
if debug:
log_level = logging.DEBUG
elif verbose:
log_level = logging.INFO
logging.basicConfig(format=LOG_FORMAT, datefmt=DATE_FORMAT,
level=log_level)
def main(argv=sys.argv):
opts = parse_opts(argv)
configure_logger(opts.verbose, opts.debug)
logger.info('Using config file at: %s' % opts.config_file)
if opts.mapping_file:
logger.info('Using mapping file at: %s' % opts.mapping_file)
iface_array = []
provider = None
if opts.provider:
if opts.provider == 'ifcfg':
provider = impl_ifcfg.IfcfgNetConfig(noop=opts.noop,
root_dir=opts.root_dir)
elif opts.provider == 'eni':
provider = impl_eni.ENINetConfig(noop=opts.noop,
root_dir=opts.root_dir)
elif opts.provider == 'iproute':
provider = impl_iproute.IPRouteNetConfig(noop=opts.noop,
root_dir=opts.root_dir)
else:
logger.error('Invalid provider specified.')
return 1
else:
if os.path.exists('%s/etc/sysconfig/network-scripts/' % opts.root_dir):
provider = impl_ifcfg.IfcfgNetConfig(noop=opts.noop,
root_dir=opts.root_dir)
elif os.path.exists('%s/etc/network/' % opts.root_dir):
provider = impl_eni.ENINetConfig(noop=opts.noop,
root_dir=opts.root_dir)
else:
logger.error('Unable to set provider for this operating system.')
return 1
# Read config file containing network configs to apply
if os.path.exists(opts.config_file):
with open(opts.config_file) as cf:
iface_array = yaml.load(cf.read()).get("network_config")
logger.debug('network_config JSON: %s' % str(iface_array))
else:
logger.error('No config file exists at: %s' % opts.config_file)
return 1
if not isinstance(iface_array, list):
logger.error('No interfaces defined in config: %s' % opts.config_file)
return 1
# Read the interface mapping file, if it exists
# This allows you to override the default network naming abstraction
# mappings by specifying a specific nicN->name or nicN->MAC mapping
if os.path.exists(opts.mapping_file):
with open(opts.mapping_file) as cf:
iface_map = yaml.load(cf.read())
iface_mapping = iface_map.get("interface_mapping")
logger.debug('interface_mapping JSON: %s' % str(iface_mapping))
persist_mapping = opts.persist_mapping
logger.debug('persist_mapping: %s' % persist_mapping)
else:
iface_mapping = None
persist_mapping = False
for iface_json in iface_array:
iface_json.update({'nic_mapping': iface_mapping})
iface_json.update({'persist_mapping': persist_mapping})
validation_errors = validator.validate_config(iface_array)
if validation_errors:
if opts.exit_on_validation_errors:
logger.error('\n'.join(validation_errors))
return 1
else:
logger.warning('\n'.join(validation_errors))
for iface_json in iface_array:
obj = objects.object_from_json(iface_json)
provider.add_object(obj)
files_changed = provider.apply(cleanup=opts.cleanup,
activate=not opts.no_activate)
if opts.noop:
for location, data in files_changed.items():
print("File: %s\n" % location)
print(data)
print("----")
if opts.detailed_exit_codes and len(files_changed) > 0:
return 2
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
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