61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
# Copyright (c) 2012 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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from oslo_log import log as logging
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from nova.scheduler import filters
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LOG = logging.getLogger(__name__)
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class RetryFilter(filters.BaseHostFilter):
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"""Filter out nodes that have already been attempted for scheduling
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purposes
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"""
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# NOTE(danms): This does not affect _where_ an instance lands, so not
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# related to rebuild.
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RUN_ON_REBUILD = False
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def __init__(self):
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super(RetryFilter, self).__init__()
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LOG.warning('The RetryFilter is deprecated since the 20.0.0 Train '
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'release. Since the 17.0.0 (Queens) release, the '
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'scheduler has provided alternate hosts for rescheduling '
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'so the scheduler does not need to be called during a '
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'reschedule which makes the RetryFilter useless.')
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def host_passes(self, host_state, spec_obj):
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"""Skip nodes that have already been attempted."""
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retry = spec_obj.retry
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if not retry:
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return True
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# TODO(sbauza): Once the HostState is actually a ComputeNode, we could
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# easily get this one...
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host = [host_state.host, host_state.nodename]
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# TODO(sbauza)... and we wouldn't need to primitive the hosts into
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# lists
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hosts = [[cn.host, cn.hypervisor_hostname] for cn in retry.hosts]
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passes = host not in hosts
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if not passes:
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LOG.info("Host %(host)s fails. Previously tried hosts: "
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"%(hosts)s", {'host': host, 'hosts': hosts})
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# Host passes if it's not in the list of previously attempted hosts:
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return passes
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