Comment by craigkerstiens

We don't use Patroni or any of the other off the shelf items. We rolled our own primarily from our years of experience on Heroku Postgres. We're actually working on a detailed post on how HA and disaster recovery works for Citus Cloud, though the core mechanism powering it all under the covers is our state machine. You can read a bit about how it works in this post: https://www.citusdata.com/blog/2016/08/12/state-machines-to-...