37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
# 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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from oslo_log import log as logging
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LOG = logging.getLogger(__name__)
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def get_domain_info(libvirt, host, virt_dom):
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"""Method virDomain.info (libvirt version < 1.2.11) is
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affected by a race condition. See bug #1372670 for more details.
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This method detects it to perform a retry.
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"""
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def is_race(e):
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code = e.get_error_code()
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message = e.get_error_message()
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return (code == libvirt.VIR_ERR_OPERATION_FAILED and
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'cannot read cputime for domain' in message)
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try:
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return virt_dom.info()
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except libvirt.libvirtError as e:
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if not host.has_min_version((1, 2, 11)) and is_race(e):
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LOG.warning('Race detected in libvirt.virDomain.info, '
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'trying one more time')
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return virt_dom.info()
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raise
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