Docker allows for the creation of lightweight Linux containers that provide portable environments on demand. Containers help address issues with local development environments like performance problems and inconsistencies with production. Docker images can be easily shared across teams using Docker registries. Chef is a tool for automated configuration management that ensures consistent configurations across environments and removes repetitive manual software installation tasks. It integrates well with cloud platforms. Using Docker and Chef together provides automated software configuration within portable Docker containers, addressing problems of local dev environments and speeding up the deployment cycle.

1. AUTOMATING DEV
ENVIRONMENT
INTRODUCTION TO DOCKER &
CHEF
Kamalika Majumder

2. Nightmares working on local dev env
 Too many manual tasks required in setup
 Performance issue/machine is too slow
 Inconsistency with production environment
 My code works fine only on my machine but not in
production.

3. How to solve
 Environment on Demand
 Automated Configuration Management
 Faster Deployment cycle
 Better performance

4. Introduction to Docker
 An open source software used to perform various
operations with linux containers.
 Helps in creating environment on demand.
 Containers are light weight(Typical laptops can run
around 10-100 containers)
 Simple and easy CLI , makes it easy to script
 Using Docker registry makes it easier to share linux
containers across the teams.

5. Why Docker

6. • Run docker images
• Docker File usage
• Docker registry
Short Demo

7. Key Notes
 100 Docker instances does not mean 100 VMs.
 Each docker run command is run as a process on the
host machine.
 Docker is still under development, so it is not yet
recommended for production
 Distros : Ubuntu, Centos, Redhat .In order to make it
work on mac you need a VM with the above distros.
 By default it works on bridge network - docker0 , each
containers gets a virtual interface and a specific ip from
same range as docker0 .We can also configure specific
ip ranges.

8. Chef for Configuration Management
 Automated configuration for app deployment
 Consistency of configuration across environments
 Freedom from repetitive manual software
installations.
 Easy to integrate with various cloud platforms
(ec2,openstack etc).

9. Recipes/CookbooksRolesEnvironment
Dev
QA
Staging
Webserver/Appserver
Node1
Node2
DB Node3

10. Docker + Chef
lxc lxclxclxclxc
Dev Environment
Environment on
demand
Autamated software
configuration
Ready to
deploy
Application

11. To be continued …..
 Reference websites:
https://www.docker.io/

12. Questions ?