Comment 6 for bug 1903226

Something else we recently read was Django's documentation on memcached at https://docs.djangoproject.com/en/3.1/topics/cache/#memcached.

The document describes Django taking advantage of multiple memcached backends when they are provided in a comma-separated list.

After reading this we decided to trial reverting https://docs.openstack.org/openstack-ansible-memcached_server/ussuri/configure-ha.html entirely - all services are now talking to memcached directly.

We've also been having issues with Horizon frequently logging users out - often within 5 minutes of logging in - and since reverting the HA memcached settings users are no longer being incorrectly logged out. So that's promising!