红帽全球峰会7.3.2. 会话后端
对于基于 director 的部署，horizon horizon 的默认会话后端为 django.contrib.sessions.backends.cache，它与 memcached 结合使用。出于性能的原因，这个方法最好是本地内存缓存，对于高可用性和负载均衡安装更加安全，而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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