红帽全球峰会9.10. 会话后端
对于基于 director 的部署，horizon 的默认会话后端是 django.contrib.sessions.backends.cache，它与 memcached 结合使用。出于性能的原因，此方法首选使用本地内存缓存，具有高可用和负载平衡安装的安全，并且能够通过多个服务器共享缓存，同时仍然将其视为单一缓存。
您可以在 director 的 horizon.yaml 文件中查看这些设置：
horizon::cache_backend: django.core.cache.backends.memcached.MemcachedCache
horizon::django_session_engine: 'django.contrib.sessions.backends.cache'
horizon::cache_backend: django.core.cache.backends.memcached.MemcachedCache
horizon::django_session_engine: 'django.contrib.sessions.backends.cache'
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