61 lines
2.0 KiB
Python
61 lines
2.0 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 keystone.common import cache
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import keystone.conf
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CONF = keystone.conf.CONF
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def symptom_caching_disabled():
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"""`keystone.conf [cache] enabled` is not enabled.
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Caching greatly improves the performance of keystone, and it is highly
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recommended that you enable it.
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"""
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return not CONF.cache.enabled
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def symptom_caching_enabled_without_a_backend():
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"""Caching is not completely configured.
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Although caching is enabled in `keystone.conf [cache] enabled`, the default
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backend is still set to the no-op backend. Instead, configure keystone to
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point to a real caching backend like memcached.
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"""
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return CONF.cache.enabled and CONF.cache.backend == 'dogpile.cache.null'
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def symptom_connection_to_memcached():
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"""Memcached isn't reachable.
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Caching is enabled and the `keystone.conf [cache] backend` option is
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configured but one or more Memcached servers are not reachable or marked
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as dead. Please ensure `keystone.conf [cache] memcache_servers` is
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configured properly.
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"""
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memcached_drivers = [
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'dogpile.cache.memcached',
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'oslo_cache.memcache_pool'
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]
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if CONF.cache.enabled and CONF.cache.backend in memcached_drivers:
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cache.configure_cache()
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cache_stats = cache.CACHE_REGION.actual_backend.client.get_stats()
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memcached_server_count = len(CONF.cache.memcache_servers)
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if len(cache_stats) != memcached_server_count:
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return True
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else:
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return False
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else:
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return False
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