Source code for

# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
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from keystone.common import cache
import keystone.conf

CONF = keystone.conf.CONF

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