Garrett Honeycutt gave a presentation on the new features in Puppet v3 and Hiera. Some of the key changes in Puppet v3 include better support for Windows and Solaris, warnings about deprecation from puppet kick, and improved speed. Dynamic scoping is no longer supported and data lookup now prefers Hiera values over those defined in code. Hiera allows managing hierarchical external data to cleanly separate code from configuration.

1. Puppet v3 and Hiera
LOAD
2013-04-07
Antwerpen, BE
Garrett Honeycutt
Automation Consultant @ GH Solutions, LLC
gh@garretthoneycutt.com
http://linkedin.com/in/garretthoneycutt

2. # whoami
...not a graphic designer

3. What’s new in v3?
it looks different

4. What’s new in v3?
Ruby 1.9.3 fully
supported

5. What’s new in v3?
Better support for
Windows and
Solaris

6. What’s new in v3?
puppet kick warns
about deprecation

7. What’s new in v3?
Speed

8. What’s new in v3?
Adrien Thebo
http://somethingsinistral.net/blog/the-angry-guide-to-puppet-3/

9. What’s new in v3?
dynamic scoping

10. What’s new in v3?
dynamic scoping
Gone!

11. scoping
include dynamic
class dynamic {
$var = ‘from dynamic’
include included
}
class included {
notify { $var: } # deprecated
notify { $dynamic::var: } # correct
}

12. What’s new in v3?
looking up your
data

13. data lookup precedence
# class defaults
class foo (
attribute = ‘module_default’,
){
...
}

14. data lookup precedence
# passing a value with
# parameterized classes
class { ‘foo’:
attribute => ‘param_data’,
}

15. data lookup precedence
# Hiera
# <whatever>.yaml
foo::attribute: “no data in code”

16. Hiera
Wait.. What’s Hiera?
aka
demo time

17. Style
Why declaring parameterized
classes is evil

18. data in code :(
class { ‘common’:
root_password => ‘mypass’,
}

19. Style
Why defining parameterized
classes is awesome

20. sane defaults :)
class common (
root_password = ‘puppet’,
){
...
}

21. Style
Why defining parameterized
classes is really awesome

22. data lookups in Hiera
common::root_password: mysecret

23. Puppet v3 and Hiera
LOAD
2013-04-07
Antwerpen, BE
Garrett Honeycutt
Automation Consultant @ GH Solutions, LLC
gh@garretthoneycutt.com
http://linkedin.com/in/garretthoneycutt