The document provides an introduction to Hiera, a hierarchical data store used in Puppet configurations. It discusses how Hiera allows for flexible organization and override of configuration data. Specific use cases shown include setting different smarthost values for most hosts but overriding it for one host and the DMZ. The presentation recommends starting with a simple Hiera implementation and expanding from there, and provides tips on determining hierarchy and using Hiera data in Puppet modules.

2. whoami
●
Ger Apeldoorn
– Freelancer
●
Puppet Consultancy
●
Puppet trainer for NL via AmazicSoft
– AutiPlan VOF
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

3. Introduction to Amsterdam
PuppetCamp
Hiera

4. whoami

5. What is Hiera?

6. What is Hiera?
Hierarchical Data store
e
an organizational structur
d
in which items are ranke
according to levels of
importance
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

7. Why Hiera?
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

8. Use case
●
Smarthost setting
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

9. Use case
●
Smarthost setting
– Identical for all your hosts, except one.
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

10. Use case
●
Smarthost setting
– Identical for all your hosts, except one.
– Oh... and a seperate smarthost for the DMZ
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

11. Hiera fixes....
all the things!

12. Start small.....
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

13. Expand from there...
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

14. But first....
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

15. Determine your Hierarchy
●
Use any fact
– fqdn
– domain
– environment
– operatingsystem
– uptime_seconds
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

16. Use case
●
Smarthost setting
– Identical for all your hosts, except one.
– Oh... and a seperate smarthost for the DMZ
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

17. create_resources()
demo

18. Hiera &
Modules

19. Modules without data
●
Easy to share
●
Easier to maintain
●
Enhanced flexibility
●
Puppet 3.x → Data bindings
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

20. Modules & Data
●
Putting data in the modules file
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

21. Modules & Data
●
Parameterized classes
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

22. Modules & Data
●
Getting the data from Hiera
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

23. Modules & Data
●
Using Data bindings from Puppet 3.x
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

24. Benefits of Hiera
●
Dealing with exceptions
●
Easily share your modules
●
No more massive testing for minor
changes in data
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

25. How to start?
●
Create hiera.yaml
●
Restart Puppet master
●
Start improving
Some dutch tutorials are available
on http://puppetspecialist.nl
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

26. Any questions?

27. Thanks!
WWW: http://www.puppetspecialist.nl
Mail: info@gerapeldoorn.nl
Twitter: @gerapeldoorn
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl

28. Bye!
PuppetCamp Amsterdam Introduction to Hiera http://www.puppetspecialist.nl