QA to sous-ChefSajnikanth Suriyanarayanan

Presented at Devops Summit on 27th March 2014& at DevopsSG on 2nd October 2013

About Me● Coastal GeoScientist and Civil Engineer● 10+ years in Software Quality Assurance

and Functional Testing● HP Certified Professional in Quality Center● Lead Quality Assurance at Vistaprint● http://sajnikanth.com

● I’m a beginner● May not be the standard way

● introduction to vagrant● introduction to chef provisioning● introduction to berkshelf

Disclaimer & Take-Away

Contents● Background● Problem● Vagrant + bash● Vagrant + Chef● Demo● Lessons Learned

BackgroundAs Test Engineer, I usually:

● write test scripts● merge pull requests● deploy code● test changes

ProblemCurrent project is brand new. So:

● write test scripts● merge pull requests● deploy code (where to?)● test changes

● App lives locally● Experiment with technologies (mysql or

mongoDB; apache or nginx;)● Unstable environment

Problem ...

A server should be like a phoenix, regularly rising from the ashes - Martin Fowler

Vagrant + bash

● Reproducible● Portable● Isolated; room for experimentation● Use Bash to install apps 'automatically'

Vagrant + bash ...Changing / maintaining bash scripts?

Vagrant + ChefApprehensions:● Ruby● Steep learning curve

○ hosted chef or chef solo○ knife○ opscode○ cookbooks○ recipe○ omnibus○ information overload!!

Forget it!Let’s get our hands dirty

Install nginx on vagrant VM using Chef

Pre-Requisites● VirtualBox● vagrant installed● vagrant omnibus● vagrant guest additions● knife

Demo

vagrant init

Demo - Initialize vagrant

Demo - Create Cookbooksmkdir ./cookbooksknife cookbook site download nginxUnarchive and delete tar

Demo - Update Vagrantfile

Demo - Let’s cookvagrant up

Demo - Results?

Demo - Download apt cookbookknife cookbook site download apt

Demo - Update Vagrantfile

Demo - We try againvagrant up

Cookbook bluepill not foundCookbook rsyslog not foundCookbook build-essential not foundCookbook ohai not foundCookbook runit not foundCookbook yum not foundCookbook yum-epel not found

Demo - Download cookbooks

Demo - Update Vagrantfile

Hungry Already?

Demo - and againvagrant up

Easy way to manage cookbooks

gem install berkshelfvagrant plugin install vagrant-berkshelf

Demo - enter Berkshelf

cookbook 'nginx'

Demo - Berksfile

berks install

Demo - using berkshelf

~/.berkshelf/cookbooks/

Demo - update Vagrantfileupdate Vagrantfile to use berkshelfvagrant reload

Demo - Results

Demo - Resources

● Presentation link - http://j.mp/devops-summit● Demo repo - https://github.com/sajnikanth/chef-berkshelf-demo● Chef Tutorials

○ http://nathenharvey.com/blog/2012/12/06/learning-chef-part-1/○ https://learnchef.opscode.com/quickstart/

● Berkshelf Introduction - http://youtu.be/hYt0E84kYUI

3 Important lessons learned while using chef

● RTFM● RTFM● RTFM

Lessons Learned

Questions?