An introduction to the utilization of flexible Thresholds and how to adapt your checks to an ever changing Environment. Central points: – Where can I use flexible Thresholds – What are the advantages and disadvantages – Is it worth it?

1. % Icinga2 + Director, flexible Thresholds with Ansible % Kevin
Honka % 23.11.2017

2. The Problem
How do you keep track of static Thresholds in a changing
environment?

3. A changing environment

4. Day 1
Server Bob
Specs:
4 CPU Cores
2 HDDs
1 Network interface
Server Alice
Specs:
4 CPU Cores
2 HDDs
1 Network interface

5. Day 2
Server Bob
Specs:
2 CPU Cores
2 HDDs
1 Network interface
Server Alice
Specs:
4 CPU Cores
2 HDDs
2 Network interface

6. Solution
Let software like Ansible, Puppet, Chef do it for you.

7. Example

8. Example
object Host "awx.mw-krz-swd.de" {
import "CentOS7"
display_name = "AWX Server"
address = "10.194.29.136"
vars.hdds = [ "/dev/sda1" ]
vars.load_cload1 = 2
vars.load_cload15 = 1.5
vars.load_cload5 = 1.75
vars.load_wload1 = 1.75
vars.load_wload15 = 1
vars.load_wload5 = 1.5
}
TBF

9. // Picture of Changing infrastructure.

10. Where can they be used
Almost anywhere. Flexible Thresholds are designed for Storagenodes
and databases.

11. Why should I use them
Early alerting

12. Why should I use them
Early alerting
more time to plan expansions

13. Why should I use them
Early alerting
more time to plan expansions
Acting, not reacting