Introduction to Puppet

Transcript

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 vanilla server apply puppet Your desired application server Before After Transformation
5. how?(1/2) master-agent mode puppet master puppet agent (server 1) puppet agent (server 2) puppet agent (server 3) puppet agent (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/