In our previous blog posts, we discussed the capabilities and functioning of PostgreSQL Automatic Failover (PAF) by Cluster Labs and Replication Manager (repmgr) by 2ndQuadrant. In the final post of this series, we will review the last solution, Patroni by Zalando, and compare all three at the end so you can determine which high availability framework is best for your PostgreSQL hosting deployment. Patroni originated as a fork of Governor, a project from Compose. It is an open-source tool suite, written in Python, for managing high availability of PostgreSQL clusters. Instead of building its own consistency protocol, Patroni smartly leverages the consistency model provided by a Distributed Configuration Store (DCS). It also supports other DCS solutions like Zookeeper, etcd, Consul and Kubernetes. Patroni ensures the end-to-end setup of PostgreSQL HA clusters, including streaming replication. It supports various ways for creating a standby node, and works like a template that can be customizedto your needs.