54 lines
1.9 KiB
Python
54 lines
1.9 KiB
Python
# Copyright 2013 OpenStack Foundation
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# All Rights Reserved.
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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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import sys
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import oslo.utils.strutils as strutils
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from glance import i18n
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try:
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import dns # NOQA
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except ImportError:
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dnspython_installed = False
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else:
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dnspython_installed = True
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def fix_greendns_ipv6():
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if dnspython_installed:
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# All of this is because if dnspython is present in your environment
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# then eventlet monkeypatches socket.getaddrinfo() with an
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# implementation which doesn't work for IPv6. What we're checking here
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# is that the magic environment variable was set when the import
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# happened.
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nogreendns = 'EVENTLET_NO_GREENDNS'
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flag = os.environ.get(nogreendns, '')
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if 'eventlet' in sys.modules and not strutils.bool_from_string(flag):
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msg = i18n._("It appears that the eventlet module has been "
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"imported prior to setting %s='yes'. It is currently "
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"necessary to disable eventlet.greendns "
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"if using ipv6 since eventlet.greendns currently "
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"breaks with ipv6 addresses. Please ensure that "
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"eventlet is not imported prior to this being set.")
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raise ImportError(msg % (nogreendns))
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os.environ[nogreendns] = 'yes'
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i18n.enable_lazy()
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fix_greendns_ipv6()
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