Machines Dancing Like Marionettes

We talk a lot about the best practices in how we build things, how our front-ends work, how we automate our testing, deployments, project bootstrapping, etc, but for the most part, we neglect the very foundation of our stack, the servers we deploy on, so let's delve into the world of server automation and get those boxes dancing like marionettes as we pull the strings.

Transcript

1. Machines Dancing Like Marionettes Daniel Knell
2. Who is this Jerk?
3. Automate (almost) all the things
4. Special Snowflakes
5. Cattle
6. Puppet
7. Declarative?
8. Modules
9. Resources package { "nodejs": ensure => present } file { "/etc/motd": ensure => present, content => "HELLO!" } service { "redis-server": ensure => running }
10. Variables $greeting = "HELLO" $ensure = present file { "/etc/motd": ensure => $ensure, content => "${greeting} WORLD!" }
11. Classes class nodejs { package { "nodejs": ensure => present } } include nodejs
12. Classes class nodejs ($ensure = present) { package { "nodejs": ensure => $ensure } } class { "nodejs": ensure => absent } include nodejs
13. Nodes node "www.example.com" { include nodejs } node "www01.example.com", "www02.example.com", "www03.example.com" { include nodejs } node /^www\d+\.example\.com/ { include nodejs } node "default" { include nodejs }
14. Files # /etc/puppet/modules/motd/manifests/init.pp class motd { file { "/etc/motd": ensure => present, source => “puppet://motd/motd.txt" } } # /etc/puppet/modules/motd/files/motd.txt HELLO WORLD!
15. Facts
16. Facter $ facter architecture => x86_64 domain => local facterversion => 1.6.17 fqdn => Obsidian.local hardwareisa => i386 hardwaremodel => x86_64 hostname => Obsidian id => daniel interfaces => lo0,gif0,stf0,en0,p2p0,vboxnet0,vboxnet1,utun1,utun0 ipaddress => 10.0.1.8 ipaddress6 => fd29:252f:ec95:f2ff:f4ba:3854:6dd:ea40 ipaddress_en0 => 10.0.1.8 ipaddress_lo0 => 127.0.0.1 ipaddress_vboxnet0 => 192.168.33.1 ipaddress_vboxnet1 => 172.16.0.1 is_virtual => false kernel => Darwin kernelmajversion => 12.2 kernelrelease => 12.2.1 kernelversion => 12.2.1
17. Facts class motd { file { "/etc/motd": ensure => present, content => "Welcome to ${::hostname}!" } }
18. Templates # /etc/puppet/modules/motd/manifests/init.pp class motd { file { "/etc/motd": ensure => present, content => template("motd/motd.erb") } } # /etc/puppet/modules/motd/templates/motd.erb Welcome to <%= @hostname %>!
19. Custom Resource Types # /etc/puppet/modules/nginx/manifests/site.pp define nginx::site ( $aliases ) { file { "/etc/nginx/conf/sites/${name}": ensure => present, content => template("nginx/site.erb") } file { "/var/www/${name}": ensure => directory } } # /etc/puppet/modules/websites/manifests/init.pp class websites { nginx::site { "www.example.com": aliases => [ "example.com" ] } nginx::site { "www.example.org": aliases => [ "example.org" ] } }
20. The Forge http://forge.puppetlabs.com/
21. Puppetfile # /etc/puppet/Puppetfile forge "http://forge.puppetlabs.com" mod "puppetlabs/stdlib" mod "nodejs", :git => "git://github.com/artisanofcode/puppet-nodejs.git"
22. Puppet Lint $ rake lint manifests/init.pp - WARNING: class not documented on line 1
23. RSpec Puppet # /etc/puppet/modules/ntp/spec/classes/redis_server_spec.rb require 'spec_helper' describe ‘redis’, :type => :class do it { should include_class(‘redis') } it do should contain_file(‘redis::config’).with({ :ensure => 'present', :path => ‘/etc/redis/redis.conf’ }) end context "with ensure => absent" do let(:params) { {:ensure => 'absent'} } it { should contain_package(‘redis-server’).with_ensure(‘absent') } it { should_not contain_service(‘redis-server’) } it { should contain_file(‘redis::config’).with_ensure('absent') } end end
24. Vagrant
25. Boxen # /opt/boxen/repo/modules/people/manifests/danielknell.pp class people::danielknell { include textmate include opera include evernote include spotify include steam ... }
26. Links •Puppet Labs - http://puppetlabs.com/ •Hiera - http://projects.puppetlabs.com/projects/hiera •Librarian Puppet - http://librarian-puppet.com/ •Puppet Forge - http://forge.puppetlabs.com/ •Puppet Lint - http://puppet-lint.com/ •RSpec Puppet - http://rspec-puppet.com/ •Vagrant - http://vagrantup.com/ •Boxen - http://boxen.github.com/
27. Thats All Folks email: contact@danielknell.co.uk twitter: @danielknell website: http://danielknell.co.uk/ Any Questions / Trolling?