1. Introduction to Puppet
Habeeb Rahman | hrahman@apigee.com | pk.habi@gmail.com

2. pre puppet/config management era
manual Installation
login and perform installation/config changes
ad hoc scripts/tools
not scalable
everyone solving same problems their own way
boring

3. puppet era
mature tools
sharing
opensource
infrastructure as a code
version controlled

4. what?
Vanilla Server
Your desired
vanilla server apply puppet application
server
Before Transformation After

5. how? (1/2)
master-agent mode
puppet
master
puppet agent puppet agent puppet agent puppet agent
(server 1) (server 2) (server 3) (server 'n')

6. how? (2/2)
standalone mode
puppet apply
puppet
(server 1)

7. components
facter & facts
puppet language
resources
manifests
classes
templates

8. facter & facts
puppet uses facter to gather information
about the host system

9. puppet language
● DSL
● ruby

10. resources
● the building blocks
● model system configurations
● built-in resources
user { 'dave':
ensure => 'present',
home => '/home/dave',
shell => '/bin/zsh'
}
● puppet describe -s user

11. manifests
puppet programs are called “manifests”
file extension: .pp

12. classes
● describe one part of what makes up a
system’s identity
● not object-oriented programming 'class'

13. templates
puppet uses ruby erb templating system
file {'/etc/foo.conf':
ensure => file,
require => Package['foo'],
content => template('foo/foo.conf.erb'),
}

14. how does it all fit together?

15. catalog

16. puppet help
puppet describe
prints help about puppet resource types, providers, and metaparameters
puppet help <subcommand>
help about puppet commands

17. learning
http://docs.puppetlabs.com/learning/