Enhance your Agility with DevOps

View DevOps course details at www.edureka.co/devops
Enhance Your Agility with DevOps

www.edureka.co/devops
Objectives
At the end of this module, you will be able to understand -
 DevOps and its importance
 DevOps Life cycle
 Configuration Management Using Puppet
 Demo using Puppet to install Apache web server.
 Continuous Integration Using Jenkins
 Demo using Jenkins

What is DevOps
DevOps is a mindset that enables communication, collaboration and integration between
Software developers, Quality Engineers and Information Technology ( Operations ) professionals to enable rapid
evolution of products or services.

Development & Operation (DevOps)
“Dev” is used as a shorthand for developers in
particular, but in practice it is even wider and it
means that “all the people involved in
developing the product,” that include the
product, QA and other disciplines.
“Ops” is a blanket term for systems
engineers/Administrators, Release engineers,
DBAs, Network engineers, Security
professionals and various other sub-disciplines
and job titles”

Development & Operation (DevOps)
DEVOPS
Development
(Software
Engineering)
Quality
Assurances
Technical
Operations

Roles of Developers :
 Develop/modify applications
 Try new technologies
Roles of Operations :
 Build, Deploy and release
 Performance and availability
 Create or enhance services
Development & Operations

Slide 7Slide 7 www.edureka.co/devops
Why DevOps?
Customers Requirements
Dev and
Testing Team
Operations
Gap Between
Developers and
Operations

Why DevOps?
Development
Operations
Change
» Developers introduce changes
» They try to implement every new
techniques introduced
» Change is the enemy for Operations
» Changes can lead to instability

Dev Tools Ops Tools
» Difficult to integrate tools
» Less interest in learning each others tools
» Different implementation of similar tools
Why DevOps?

During Deployment
Sends out artifacts based on
requirements
Manually hacks the scripts received and
changes the config files to reflect changes
in production which could potentially lead
to an issue.
Development Operations
Why DevOps?

All the artifacts are fine, the error
is because of some other issue.
QA was given wrong setup.
Developer gave faulty artifacts
Development
Operations
Day 1: Loss of Work
Why DevOps?

After deployment, QA sees some
anomalies and raises defects
Day 3: After Deployment
Operations
Developer realizes that correct
DB was not deployed
Development
Why DevOps?

DevOps as a Solution
Instead of seeing these two groups as silos who pass things along but don’t really work together, DevOps
recognizes the interdependencies of software development and IT operations and helps an organization to produce
software and IT services more rapidly, with frequent iterations.
DevOps bridges the gap between agile software development and operations

DevOps Skills
DevOps Tools – Ability to administer and customize them
Scripting/Automation Skills – Demonstrates the traditional scripting skills to IT operations
Coding Skill – Should possess developer skills in using automation
Process re-engineering Skills – Reflects the holistic view of IT and development as a single system, instead
of two different functions
Skills Products
Linux/Unix Commands & Administration
Shell Scripting Bash, Sed/Awk
Coding Perl, Python, Ruby
Configuration Management Puppet, SaltStack, Chef
Bare Metal Configuration Cobbler, Foreman, PXE, DHCP, DNS
DevOps Skill Matrix

DevOps Cycle

Provisioning Configuration Integration
Load Balancer
WebServer WebServer
DB Master
DB Slave DB Slave
Load Balancer
WebServer WebServer
DB Master
DB Slave DB Slave
DevOps Life Cycle

DevOps Tools
 Tools for DevOps can be categorized based on the layer of Automation you choose
 Each layer has its own tools to build Automation
Infrastructure Automation 1. Cobbler
2. Foreman
3. Crowbar
Configuration Management 1. Puppet
2. SaltStack
3. Chef
Continuous Integration/Deployment 1. Jenkins
2. SVN, Git, Perforce
3. Ant, Maven
Monitoring 1. Nagios, NewRelic, Sensu, Zabbix
2. Custom Tools

Revision control System 1. Git
2. Cvs
3. Subversion
Software Configuration Management 1. Clearcase
2. Perforce
3. Accurev
Virtualization management Software 1. Vcentre
2. Hyper-V
DevOps Tools (Contd.)

Integration Engineer Cloud Specialist
Automation Engineer Release Engineer
DevOps Roles

Work of a System administrator:
» Install servers
» configure them
» maintain them
» Update the configuration periodically
Why Puppet?

Why Puppet?
It is tough to scale without
automation in place.

Puppet is a configuration management tool that is used for deploying, configuring, managing servers.
Features:
Why Puppet?
It controls all the steps, right from the bootstrapping to the end of Server life
Can define configuration at the node level
Can group them according to roles
Example: WebSevers, DB Servers.
Maintains consistency across nodes
Example: if a change is done locally, it is rolled back to the original configuration

Puppet works on the Master Server model
Puppet Master: This machine contains all the
configuration for different hosts. Puppet master
runs as a daemon on this master server.
Puppet Agent: Daemon which runs on each node
and talks to the master on a regular interval.
The connection between these two machines is
made in a secure encrypted channel with the help
of SSL
How Puppet Works?

Following are the steps for Puppet configuration:
1. Clients connects to master and master identifies the configuration according to client type.
2. Master builds the Configuration that needs to be applied to a host, compiles it and makes it ready
3. Clients pull the Configuration and apply them on the respective nodes
Puppet Configuration

Demo on Puppet

“Continuous Integration is a software development practice where members of a team integrate their
work frequently, usually each person integrates at least daily - leading to multiple integrations per day.
Each integration is verified by an automated build (including test) to detect integration errors as quickly
as possible”
– Martin Fowler
Continuous Integration

At a regular frequency (ideally at every commit), the system is:
Integrated
All changes up until that point are combined into the project
Built
The code is compiled into an executable or package
Tested
Automated test suites are run
Archived
Versioned and stored so it can be distributed as is, if desired
Deployed
Loaded onto a system where the developers can interact with it
Continuous Integration

 Code Repositories
SVN, Mercurial, Git
 Continuous Build Systems
Jenkins, Bamboo, Cruise Control
 Test Frameworks
Junit, Cucumber, CppUnit
 Artifact Repositories
Nexus, Artifactory
Continuous Integration - Tools

 Jenkins provide continuous Integration services for software development. It’s container
is based on Tomcat and can work with various revision control systems like SVN, CVS,
Git, etc.
 This originally started as Hudson and then after Oracle’s claim, the name Jenkins was
coined
 It includes a feature-rich web user interface that provides the ability to trigger builds,
customize builds, manage resources, manage plugins, and many other features
Jenkins

 Builds can be started by:
» Commit in a version control system
» Scheduling via a cron-like mechanism
» Building when other builds have completed or by requesting a specific build URL
Jenkins (Contd.)

Components of Build

Demo on Jenkins

www.edureka.co/apache-spark-scala-training
LIVE Online Class
Class Recording in LMS
24/7 Post Class Support
Module Wise Quiz
Project Work
Verifiable Certificate
Course Features

Questions

 Module 1
» Introduction to DevOps and its Necessities
 Module 2
» Understand Common Infrastructure Servers
 Module 3
» Implement Automated Installations and Deployments
 Module 4
» Understand Performance tuning aspects and basic
Security for Infrastructure
Course Topics
 Module 5
» Basics of Bash/Python Scripting
 Module 6
» Basics of Virtualization and it's Concepts
 Module 7
» Monitoring And Logging
 Module 8
» Useful DevOps Tools & Commands

Enhance your Agility with DevOps

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