/usr/bin/neutron-rootwrap-xen-dom0 is in neutron-common 2:8.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | #!/usr/bin/python
# Copyright (c) 2012 OpenStack Foundation
# 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.
"""Neutron root wrapper for dom0.
Executes networking commands in dom0. The XenAPI plugin is
responsible determining whether a command is safe to execute.
"""
from __future__ import print_function
from six.moves import configparser as ConfigParser
from oslo_serialization import jsonutils as json
import os
import select
import sys
import traceback
import XenAPI
RC_UNAUTHORIZED = 99
RC_NOCOMMAND = 98
RC_BADCONFIG = 97
RC_XENAPI_ERROR = 96
def parse_args():
# Split arguments, require at least a command
exec_name = sys.argv.pop(0)
# argv[0] required; path to conf file
if len(sys.argv) < 2:
print("%s: No command specified" % exec_name)
sys.exit(RC_NOCOMMAND)
config_file = sys.argv.pop(0)
user_args = sys.argv[:]
return exec_name, config_file, user_args
def _xenapi_section_name(config):
sections = [sect for sect in config.sections() if sect.lower() == "xenapi"]
if len(sections) == 1:
return sections[0]
print("Multiple [xenapi] sections or no [xenapi] section found!")
sys.exit(RC_BADCONFIG)
def load_configuration(exec_name, config_file):
config = ConfigParser.RawConfigParser()
config.read(config_file)
try:
exec_dirs = config.get("DEFAULT", "exec_dirs").split(",")
filters_path = config.get("DEFAULT", "filters_path").split(",")
section = _xenapi_section_name(config)
url = config.get(section, "xenapi_connection_url")
username = config.get(section, "xenapi_connection_username")
password = config.get(section, "xenapi_connection_password")
except ConfigParser.Error:
print("%s: Incorrect configuration file: %s" % (exec_name, config_file))
sys.exit(RC_BADCONFIG)
if not url or not password:
msg = ("%s: Must specify xenapi_connection_url, "
"xenapi_connection_username (optionally), and "
"xenapi_connection_password in %s") % (exec_name, config_file)
print(msg)
sys.exit(RC_BADCONFIG)
return dict(
filters_path=filters_path,
url=url,
username=username,
password=password,
exec_dirs=exec_dirs,
)
def filter_command(exec_name, filters_path, user_args, exec_dirs):
# Add ../ to sys.path to allow running from branch
possible_topdir = os.path.normpath(os.path.join(os.path.abspath(exec_name),
os.pardir, os.pardir))
if os.path.exists(os.path.join(possible_topdir, "neutron", "__init__.py")):
sys.path.insert(0, possible_topdir)
from oslo_rootwrap import wrapper
# Execute command if it matches any of the loaded filters
filters = wrapper.load_filters(filters_path)
filter_match = wrapper.match_filter(
filters, user_args, exec_dirs=exec_dirs)
if not filter_match:
print("Unauthorized command: %s" % ' '.join(user_args))
sys.exit(RC_UNAUTHORIZED)
def run_command(url, username, password, user_args, cmd_input):
try:
session = XenAPI.Session(url)
session.login_with_password(username, password)
host = session.xenapi.session.get_this_host(session.handle)
result = session.xenapi.host.call_plugin(
host, 'netwrap', 'run_command',
{'cmd': json.dumps(user_args), 'cmd_input': json.dumps(cmd_input)})
return json.loads(result)
except Exception as e:
traceback.print_exc()
sys.exit(RC_XENAPI_ERROR)
def main():
exec_name, config_file, user_args = parse_args()
config = load_configuration(exec_name, config_file)
filter_command(exec_name, config['filters_path'], user_args, config['exec_dirs'])
# If data is available on the standard input, we need to pass it to the
# command executed in dom0
cmd_input = None
if select.select([sys.stdin,],[],[],0.0)[0]:
cmd_input = "".join(sys.stdin)
return run_command(config['url'], config['username'], config['password'],
user_args, cmd_input)
if __name__ == '__main__':
print(main())
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