Summary

After Zabbix is installed and configured, a moment comes when maintenance tasks become important. In this last chapter, we looked at three important tasks:

  • Monitoring Zabbix itself: We covered internal items that allow figuring out how much data the Zabbix server or proxy is receiving, monitoring cache usage, verifying how busy the internal processes are, how many unsupported items we have, and a few other things.
  • Making backups: We discussed the suggested and popular approaches to making backups (and restoring from them, too) of the most important thing in Zabbix—its database.
  • Upgrading Zabbix: We found out the differences between minor and major version upgrades and how the database is automatically patched by the Zabbix server. We also learned about LTS versions, which are supported for 3 years, and for 2 extra years for critical and security fixes, while the other versions are supported for about 1 month from when the next version is released.

While talking about upgrades, we also figured out how the compatibility between different Zabbix components works. With minor-level upgrades, it was very easy—all components, including the server, proxy, and agent, are compatible with each other. Let's try to visualize the major upgrade level compatibility matrix:

Summary

As a reminder, from the support perspective, the server and proxy should be of the same major version, and they support all older agent versions. Regarding the Zabbix Java gateway, it should to be from the same major version as the server or proxy—although the protocol has not changed, there are no official tests done and no support provided for different major versions.

Tip

Before performing a major Zabbix version upgrade, make sure to have a database backup.

After dealing with these three major topics, we discussed general suggestions to keep Zabbix performance acceptable, paying extra attention to housekeeper configuration.

We also found out a way to see the changes made to the Zabbix configuration—the audit log. It allows us to see who made what changes to hosts, items, and other entities. We were a bit disappointed to find out this log does not actually record all operations, especially those performed through the API.

We concluded with quite a detailed look at the parameters in the server, proxy, and agent configuration files. Is it maybe worth reminding you to pay close attention to the comments in the configuration files themselves?

We will conclude the book with two appendices, where we'll discuss the steps and methods for Zabbix troubleshooting as well as ways to interact with and join the Zabbix community.

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