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PostgreSQL High Availability Cookbook - Second Edition

You're reading from PostgreSQL High Availability Cookbook - Second Edition

Product type Book

Published in Feb 2017

Publisher Packt

ISBN-13 9781787125537

Pages 536 pages

Edition 2nd Edition

Languages

Concepts

High Performance Programming

Author (1):

Shaun Thomas

Table of Contents (18) Chapters

Title Page

Credits

About the Author

About the Reviewer

www.Packtpub.com

Customer Feedback

Preface

1. Hardware Planning

2. Handling and Avoiding Downtime

3. Pooling Resources

4. Troubleshooting

5. Monitoring

6. Replication

7. Replication Management Tools

8. Simple Stack

9. Advanced Stack

10. Cluster Control

11. Data Distribution

Configuring Nagios to monitor a database host

Once Nagios is installed, it will automatically configure a few basic monitors directed toward its own server. If we click on the Hosts link in the web administration site, we are presented with this:

The local server is all that we are currently watching. This is useful to verify that Nagios is working as intended, but we need to monitor one or more database servers as well. In this recipe, we will learn how to watch external servers. By the end, we should see at least one more server listed by Nagios.

Getting ready

Initially, Nagios can only monitor remote servers by checking exposed services such as HTTP, FTP, or PostgreSQL. To check items such as CPU, RAM, or disk space, we need to rely on Nagios Remote Plugin Executor (NRPE) to forward system information to the monitoring server upon request. This means that NRPE must be installed on any server we want to monitor, including our PostgreSQL servers.

To install this on Debian-based servers, use...

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Authors (1)

Shaun Thomas

Shaun M. Thomas has been working with PostgreSQL since late 2000. He is a frequent contributor to the PostgreSQL Performance and General mailing lists, assisting other DBAs with the knowledge he's gained over the years. In 2011 and 2012, he gave presentations at the Postgres Open conference on topics such as handling extreme throughput, high availability, server redundancy, and failover techniques. Most recently, he has contributed the Shard Manager extension and the walctl WAL management suite. Currently, he serves as the database architect at PEAK6 Investments, where he develops standard operating procedure (SOP) guidelines to facilitate reliable server architecture among many other tasks. Many of the techniques used in this book were developed specifically for this extreme environment. He believes that PostgreSQL has a stupendous future ahead, and he can't wait to see the advancements subsequent versions will bring. https://www.linkedin.com/in/bonesmoses

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