- Icinga 2 version used : r2.14.0-1
- Platform: CentOS Linux
*version :7
Thanks for posting your question. Please start by reading our documentation, especially the Monitoring Basics part. If you then have more specific questions, please post them.
Btw, your Icinga 2 version is outdated and vulnerable. Please update immediately. Your operating system, CentOS 7, is outdated as well. Please consider switching to an operating system still receiving updates.