56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
# Copyright 2020 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 os
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from os import path
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import re
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from oslo_concurrency import processutils
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from oslo_utils import fileutils
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from neutron import privileged
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NETSTAT_PIDS_REGEX = re.compile(r'.* (?P<pid>\d{2,6})/.*')
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@privileged.default.entrypoint
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def find_listen_pids_namespace(namespace):
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return _find_listen_pids_namespace(namespace)
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def _find_listen_pids_namespace(namespace):
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"""Retrieve a list of pids of listening processes within the given netns
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This method is implemented separately to allow unit testing.
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"""
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pids = set()
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cmd = ['ip', 'netns', 'exec', namespace, 'netstat', '-nlp']
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output = processutils.execute(*cmd)
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for line in output[0].splitlines():
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m = NETSTAT_PIDS_REGEX.match(line)
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if m:
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pids.add(m.group('pid'))
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return list(pids)
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@privileged.default.entrypoint
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def delete_if_exists(_path, remove=os.unlink):
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fileutils.delete_if_exists(_path, remove=remove)
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@privileged.default.entrypoint
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def path_exists(_path):
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return path.exists(_path)
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