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#!/usr/bin/env python
# Copyright 2015 Sam Yaple
#
# 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.
# This file exists because we want to create and delete any network
# namespaces from the host mount namespace. This allows the host to
# access all of the neutron network namespaces as well as all
# containers that bind mount /run/netns from the host.
# This is required for "thin" neutron containers to function properly
import nsenter
import subprocess
import sys
def host_mnt_exec(cmd):
try:
with nsenter.ExitStack() as stack:
stack.enter_context(
nsenter.Namespace(
'1',
'mnt',
proc='/opt/kolla/host_proc/'))
process_ = subprocess.Popen(cmd)
except Exception as e:
print(
"An error has occured with a component that Kolla manages."
" Please file a bug")
print("Error: ", e)
return process_
if len(sys.argv) > 2:
# We catch all commands that ip will accept that refer
# to creating or deleteing a Network namespace
if str(sys.argv[1]).startswith("net") and (
str(sys.argv[2]).startswith("a") or
str(sys.argv[2]).startswith("d")):
# This cmd is executed in the host mount namespace
cmd = ["/usr/bin/env", "ip"] + sys.argv[1:]
sys.exit(host_mnt_exec(cmd).returncode)
else:
cmd = ["/opt/kolla/ip"] + sys.argv[1:]
else:
cmd = ["/opt/kolla/ip"]
if len(sys.argv) == 2:
cmd = cmd + sys.argv[1:]
process_ = subprocess.Popen(cmd)
sys.exit(process_.returncode)
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