This chapter covered the most commonly used system health checks that looked into most aspects of health monitoring for Windows/Linux servers and network devices, along with sample configuration and the best practices that should be followed.

We also saw how we can define relationships among hosts and dependencies among services to suppress alerts during a relatively big outage or a system failure and let Icinga pinpoint administrators to the point of failure in the infrastructure.

In the next chapter, we will move on to look at notification configuration and the options to customize notification options, and also how to write custom plugins.