DevOps Demystified

Anirudh Bhatnagar Senior Consultant, Xebia India. abhatnagar@xebia.com 9650573087

Netherlands | USA | India | France | UK

SOFTWARE DEVELOPMENT DONE RIGHT

www.xebia.in; Blog :http://.xebee.xebia.in

Amazon’s web infrastructure guru James Hamilton uses Facebook’s recently released energy data to make an educated guess for how many

servers Facebook now has: potentially 180,000. That’s up from an estimated 30,000 in the winter of 2009, and 60,000 by the Summer of 2010.

google has more than one million servers

10 releases per day!

•  3 engineers •  over 14 million users •  no hardware •  +100 instances on Amazon EC2

Agile : Responding to change..

- Less time to Market. - Low release cycle time. - Huge amount of servers on cloud. - Zero downtime. - Increasing traffic and user base.

From Idea to Product

The initial step: From Waterfall to Agile!

- Continuous Integration - Test Automation

But what about Release?

The Last Mile !

The next step : From CI to Continuous Delivery

Impediments

The Division Wall!

The Dev world

Write Code Write Unit Test Cases

The Ops World IT buying Installation of server hardware and OS Configuration of servers, networks, storage, etc… Monitoring of servers Respond to outages IT security Managing phone systems, network Change control Backup and disaster recovery planning Manage active directory Asset tracking

Software deployments Application support

Developer vs IT Operations

Bridging the gap!

Introducing Mr. DevOps

Mr. Sacha Noam Baron Cohen Designation : Senior DevOps Engineer

its a culture... its a movement..

Started as devOps days in Belgium in 2009.

Developers interested in cloud, clusters, servers, deployments, databases learn to write code to maintain them.

Ops people evolve and start developing the code to maintain infrastructure.

And they are all in one same dev team trying to achieve one goal!

Collaboration -> Best practices

Ops learn from developers - > Coding principles,

managed code, versioning.

Dev learn from Ops -> Insights of environment and deployments, their problems.

Continuous delivery cont...

Deployment Pipelines

example: Build pipelines using Jenkins

Automated Acceptance Gates

Next Hurdle : Configuration Management Lets Automate : We had Perl... We had shell scripts..

•  How soon can you write this script? •  How maintainable is it? •  Can you write test cases for it? •  Can you have versioning? •  Can you have reusability? •  Risk???? •  Idempotency

Phoenix Test

Infrastructure as code

Evolving from Scripts to code

"a flexible model for reuse by enabling users to model infrastructure as code to easily and consistently configure and deploy infrastructure across any platform.

Create a blueprint of your infrastructure that enables you to build or rebuild, automatically in minutes or hours – not weeks or months."

Tools of the game

Chef Puppet! vFabric .... ...

What is Chef?

Chef is a configuration management tool.

Using its cookbooks and recipes we can provisions VMs, environments.

Community maintained code, almost everything is prebuilt (cookbooks and recipes), need not reinvent the wheel, just modify as per the need.

Chef Server, Chef node ,Knife, Cookbook and Recipes Chef Server : Central hub which keeps the nodes in sync.

A cookbook is the fundamental unit of configuration and policy distribution in Chef. Recipes reside inside a Cookbook. Written in Ruby.

Configurations , Policies and Attributes. Example CookBook of MySQL will contain 2 recipes

1. For MySql Server 2. For MySql Client

Sample : http://community.opscode.com/cookbooks/mysql https://github.com/opscode-cookbooks/mysql

Using your workstation you write/modify cookbooks and using knife (a tool) you sync it with chef repo and chef server.

Chef Overview

Deployit

The complete picture..

Small Demo:

Using Vagrant Provision a VM and put Redis (a key-value

based noSql Database) on an Ubuntu machine.

.1) Provision VM 2.)Install Ubuntu 3.)Get the machine Up 4.)Download installer for Redis 5.)Install redis 6.)Start the service

Cloud Support : EC2 $ knife ec2 server create "role[Demo] -N

"demo.example.net" -i ami -3e02f257

Thanks!

Continuous Integration and Delivery

ü  Automated Build ü  Automated Deployments

ü  Automated provisioning of infrastructure ü  Automated Tests

Infra as Code –chef / puppet Virtualization, SSH, Shell scripting

Build automation -Jenkins/ Hudson, Linux packaging

vagrant, virtual-box ,lxc,docker, vm

Networks, End to end automation

Monitoring/logging/ integration

Cloud, EC2, Cloud foundation

Products - Deployit - XL Release

Consulting

Contact us @

Xebia India infoindia@xebia.com

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