Avoiding surprises with Chef and Vagrant Andy Gale andy-gale.com Wednesday, 29 May 13

Your development and production environment are not the same! • Different OS? • Different version of PHP? • Diverged package versions? • Different default configuration files? • Different PHP libraries and extensions? Wednesday, 29 May 13

Well, it worked on my machine! Wednesday, 29 May 13

Developing in a Virtual Machine • Consistent OS and PHP versions between production and local development • New starters can get going with development straight away • Existing developers can redistribute development platform in case of hardware failure Reasons why we should: Wednesday, 29 May 13

Developing in a Virtual Machine • Because it’s a massive pain in the arse • Scared of the command line • There’s a massive overhead keeping the VM up to date • Can never get the networking between you and your VM working Reasons why we don’t: Wednesday, 29 May 13

Vagrant Virtualised development made easy vagrantup.com Wednesday, 29 May 13

• Install Oracle’s VirtualBox www.virtualbox.org/wiki/Downloads • Install Vagrant (packages for Windows, Mac, Linux) downloads.vagrantup.com • Then... Vagrant Getting started $ vagrant box add precise32 http://files.vagrantup.com/precise32.box $ vagrant init precise32 $ vagrant up Wednesday, 29 May 13

• Simple to configure using the Vagrantfile which can be kept in version control Vagrant Configuration Vagrant::Config.run do |config| # Forward guest port 80 to # host port 4567 config.vm.forward_port 80, 4567 end • Apply with “vagrant reload” Wednesday, 29 May 13

• A tool for automating the provisioning and management of your servers • Open source • Lots of examples and code to get you started • Integrates brilliantly with Vagrant www.opscode.com/chef/ Wednesday, 29 May 13

• Talk from Jose Diaz-Gonzalez at CakeFest 2011 tv.cakephp.org/video/CakeFoundation/2011/10/04/full-stack_cakephp_deployment_by_jose_gonzalez • Or his comprehensive blog posts josediazgonzalez.com/2011/10/03/full-stack-cakephp-deployment-with-chef-and-capistrano/ Getting started Wednesday, 29 May 13

My first recipe package "ntp" do action :install end template "/etc/ntp.conf" do source "ntp.conf.erb" owner "root" group "root" mode 0644 notifies :restart, resources(:service => "ntp") end service "ntp" do action :start end Install package Create config file from template Define service and start NTP Restart service when config file changes Wednesday, 29 May 13

Getting started • “Cookbooks” are collections of templates, files and basic Ruby code that describe how to setup something. • There’s community (i.e. Open Source, Free) cookbooks for probably everything you’ll need community.opscode.com • You just need to define a few extra things Wednesday, 29 May 13

Chef and Vagrant sitting in a tree + Let’s use Vagrant to create a virtual machine to test our Chef configuration Wednesday, 29 May 13

• Install Oracle’s VirtualBox www.virtualbox.org/wiki/Downloads • Install Vagrant (packages for Windows, Mac, Linux) downloads.vagrantup.com • Assuming you have git Let’s go $ git clone git@github.com:salgo/cakefest-vagrant-chef.git $ cd cakefest-vagrant-chef $ ./git-fetch-submodules.sh $ vagrant up Wednesday, 29 May 13

But that’s not it • Vagrant also supports provisioning with Puppet or just a custom script if that’s what your company uses • Use your favourite editor, your files appear in /vagrant automatically • Because you can recreate your development environment with “vagrant up” whenever you like, you can save disk space with “vagrant destroy” Wednesday, 29 May 13

But that is it. • Questions? • @andygale on Twitter • andy-gale.com on the Web Wednesday, 29 May 13