The final element on the stack is HAProxy. Patroni uses this to redirect traffic to the primary read/write node in our PostgreSQL cluster. Technically we don't strictly need this component since Patroni will operate without it. But if we want the capability to always reach the primary node regardless of its location, this recipe is essential.
Let's build a high availability connection proxy!
Get PostgreSQL High Availability Cookbook - Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
Get Mark Richards’s Software Architecture Patterns ebook to better understand how to design components—and how they should interact.
Dive in for free with a 10-day trial of the O’Reilly learning platform—then explore all the other resources our members count on to build skills and solve problems every day.
Start your free trial Become a member now