69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
#!/usr/bin/env python
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# Copyright 2015 Sam Yaple
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This file exists because we want to create and delete any network
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# namespaces from the host mount namespace. This allows the host to
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# access all of the neutron network namespaces as well as all
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# containers that bind mount /run/netns from the host.
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# This is required for "thin" neutron containers to function properly. However,
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# due to a missing feature/bug in Docker it is not possible to use this script
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# at this time. Once Docker updates with this feature we will usre this again.
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import nsenter
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import subprocess
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import sys
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def host_mnt_exec(cmd):
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try:
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with nsenter.ExitStack() as stack:
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stack.enter_context(
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nsenter.Namespace(
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'1',
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'mnt',
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proc='/var/lib/kolla/host_proc/'))
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process_ = subprocess.Popen(cmd)
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except Exception as e:
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print(
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"An error has occurred with a component that Kolla manages."
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" Please file a bug")
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print("Error: ", e)
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return process_
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if len(sys.argv) > 2:
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# We catch all commands that ip will accept that refer
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# to creating or deleteing a Network namespace
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if str(sys.argv[1]).startswith("net") and (
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str(sys.argv[2]).startswith("a") or
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str(sys.argv[2]).startswith("d")):
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# This cmd is executed in the host mount namespace
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cmd = ["/usr/bin/env", "ip"] + sys.argv[1:]
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sys.exit(host_mnt_exec(cmd).returncode)
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else:
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cmd = ["/var/lib/kolla/ip"] + sys.argv[1:]
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else:
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cmd = ["/var/lib/kolla/ip"]
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if len(sys.argv) == 2:
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cmd = cmd + sys.argv[1:]
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process_ = subprocess.Popen(cmd)
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sys.exit(process_.returncode)
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