Automating Development Environments (Drupal Dev Days 2013)

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freistil.it Automating Development Environments Jochen Lillich

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About me

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Jochen Lillich @geewiz * 1970 Linux Sysadmin, Trainer, IT Manager Founder of freistil IT

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freistil IT http://freistil.it @freistil “Ops for Devs” freistilbox: Cluster-based PaaS for Drupal

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Challenge... “Snowﬂake” development environments Manual conﬁguration effort Mismatched software versions Long onboarding times

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...accepted! Minimize setup time Make Development ≈ Production Reproduce setup consistently on demand

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Vagrant

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“Well, I’ve been doing that for ages with... •... snapshots!” •...VM images!” •...somethingorother!”

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“No matter how complex the realities of your business, Chef makes it easy to deploy servers and scale applications throughout your entire infrastructure.” http://www.opscode.com/chef/

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Ruby DSL for system administration tasks Makes only necessary changes (Idempotence) CM with Chef

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Infrastructure as Code Cookbooks Recipes Resources Attributes Nodes Roles Providers

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Cookbook Bundles all the instructions for a certain service or system component. •Apache cookbook

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Recipe Deﬁnes what resources Chef needs to manage to reach a desired system state.

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Resource Package Service File, Directory Template Command, Script Cron Git ...

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Package, Service package ”apache2” do action :install end service ”apache2” do action [:enable, :start] end

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Template template ”/etc/apache2/apache2.conf” do source ”apache2.conf.erb” owner ”root” group ”root” mode 00644 notifies ”reload”, ”service[apache2]” end

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Attribute A value used in resource deﬁnitions that can differ from node to node. •PHP memory limit •Number of CPU’s

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Role Deﬁnes •a runlist of recipes/roles •a set of default attributes

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Community sites http://wiki.opscode.com http://community.opscode.com http://github.com/opscode-cookbooks

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Preparations Install VirtualBox •http://f7it.com/virtualboxdl Install Vagrant •http://f7it.com/vagrantdl

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Vagrant $ mkdir drupaldev $ cd drupaldev $ vagrant init precise32 \ http://files.vagrantup.com/precise32.box $ vagrant up

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Caching $ vagrant plugin install vagrant-cachier config.cache.auto_detect = true

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Cookbooks $ gem install librarian-chef $ librarian-chef init site ”http://community.opscode.com/api/v1” cookbook 'apt', '= 1.10.0' cookbook 'apache2' cookbook 'php' cookbook 'mysql' $ librarian-chef install

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Role name "drupal" description "Drupal dev VM" run_list( "recipe[apache2]", "recipe[apache2::mod_expires]", "recipe[apache2::mod_rewrite]", "recipe[apache2::mod_php5]", "recipe[php]", "recipe[php::module_mysql]", "recipe[mysql::client]", "recipe[mysql::server]" )

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Role (cont.) default_attributes({ 'mysql' => { 'server_debian_password' => 's3cr3t', 'server_root_password' => 's3cr3t', 'server_repl_password' => 's3cr3t' } })

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Provisioning config.vm.provision :chef_solo do |chef| chef.cookbooks_path = ”cookbooks” chef.roles_path = ”roles” chef.add_role ”drupal” end $ vagrant reload $ vagrant provision

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Now do some awesome stuff!

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And ﬁnally... $ vagrant destroy

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Tips Keep all building blocks local: •Cache packages •Store your own base boxes •Use a central cookbook repository

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Conclusion Combining Vagrant and Chef gives us: •Dedicated, consistent, disposable dev setups •Efﬁcient onboarding of new devs