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Chapter 3. High Availability and Failover

Now that you have a good knowledge of all the components of a Zabbix infrastructure, it is time to implement a highly available Zabbix installation. In a large environment, especially if you need to guarantee that all your servers are up and running, it is of vital importance to have a reliable Zabbix infrastructure. The monitoring system and Zabbix infrastructure should survive any possible disaster and guarantee business continuity.

High availability is one of the solutions that guarantee business continuity and provides a disaster recovery implementation; this kind of setup cannot be missed in this book.

This chapter begins with the definition of high availability, and it further describes how to implement an HA solution.

In particular, this chapter considers the three-tier setup that we described earlier:

  • The Zabbix GUI
  • The Zabbix server
  • Databases

We have described how to set up and configure each one of the components on high availability. All the procedures presented in this chapter have been implemented and tested in a real environment.

In this chapter, we will cover the following topics:

  • Understanding what high availability, failover, and service level are
  • Conducting an in-depth analysis of all the components (the Zabbix server, the web server, and the RDBMS server) of our infrastructure and how they will fit into a highly available installation
  • Implementing a highly available setup of our monitoring infrastructure
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