Book Image

PostgreSQL High Availability Cookbook - Second Edition

By : Shaun Thomas
Book Image

PostgreSQL High Availability Cookbook - Second Edition

By: Shaun Thomas

Overview of this book

Databases are nothing without the data they store. In the event of a failure - catastrophic or otherwise - immediate recovery is essential. By carefully combining multiple servers, it’s even possible to hide the fact a failure occurred at all. From hardware selection to software stacks and horizontal scalability, this book will help you build a versatile PostgreSQL cluster that will survive crashes, resist data corruption, and grow smoothly with customer demand. It all begins with hardware selection for the skeleton of an efficient PostgreSQL database cluster. Then it’s on to preventing downtime as well as troubleshooting some real life problems that administrators commonly face. Next, we add database monitoring to the stack, using collectd, Nagios, and Graphite. And no stack is complete without replication using multiple internal and external tools, including the newly released pglogical extension. Pacemaker or Raft consensus tools are the final piece to grant the cluster the ability to heal itself. We even round off by tackling the complex problem of data scalability. This book exploits many new features introduced in PostgreSQL 9.6 to make the database more efficient and adaptive, and most importantly, keep it running.
Table of Contents (18 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Installing and configuring Barman

Though PostgreSQL provides a very capable tool in pg_basebackup, it's not really a complete backup management system. Barman is a Backup and Recovery Manager developed by 2ndQuadrant to remedy that situation.

Unlike the included utilities, Barman can receive WAL archives, produce and restore database backups, list available backups, control backup retention policies, and more. With a single command, we can manage backups of any PostgreSQL server we've configured Barman to recognize. Further, we can accomplish this from the backup server itself with no need to perform any local post-installation tasks on any PostgreSQL servers.

However, before we can get any of these abilities, we must first install and configure Barman. This recipe will walk you through this process as simply as possible.

Getting ready

At the time of writing this book, the most recent version of Barman is 2.0. Because of 2ndQuadrant's close interaction with the PostgreSQL community, it is available...