Avoiding surprises with Chef and Vagrant

Talk given at CakeFest 2012 about using CakePHP with Vagrant and Chef to provide a consistent local development environment.

Transcript

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

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2. 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
   

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3. Well, it worked on my
   machine!
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4. 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:
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5. 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:
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6. Vagrant
   Virtualised development made easy
   vagrantup.com
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7. • 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
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8. • 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”
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9. • 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
   

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10. • 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
    

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11. 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
    

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12. 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
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13. Chef and Vagrant sitting in a tree
    +
    Let’s use Vagrant to create a virtual
    machine to test our Chef configuration
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14. • 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
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15. 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”
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16. But that is it.
    • Questions?
    • @andygale on Twitter
    • andy-gale.com on the Web
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