Introduction To DevOps | Devops Tutorial For Beginners | DevOps Training For Beginners | Simplilearn

What’s In It For You?
DEV OPS
Waterfall Model
Agile Model
What is DevOps?
DevOps Phases
DevOps Tools
DevOps Advantages

Waterfall Model
Design
Requirement Analysis
Development
Testing
Maintenance
Waterfall model is a traditional approach
of software development
In waterfall model, development happens in a
step by step manner
Design
Requirement Analysis
Development
Testing
Maintenance

Requirement
analysis
Programmers accept the
client requirements and
analyze it
Waterfall Model
Client Programmer
Requirements

Design
Requirement
analysis
Programmers then come up
with a project plan and a
design architecture
Waterfall Model
Project plan
Requirements
Client Programmer

Programmers code
the application as per
project plan and design
Development
Design
Requirement
analysis
Waterfall Model
Application
Requirements
Programmers code
according to plan
Client Programmer
Project plan

Design
Requirement
analysis
Development
Testing
Testing ensures the application is error-free
and meets the requirements
Waterfall Model
Testing
Requirements
Programmers code
according to plan
Client Programmer
Application
Project plan

Design
Requirement
analysis
Development
Testing
Testing
Maintenance
Application
delivered to client
After application is delivered, the
operations team maintain the
application
Waterfall Model
Requirements
Programmers code
according to plan
Client Programmer
Application
Project plan

Waterfall Model
Disadvantage of waterfall model Any new requirements from the client will restart the
development cycle
Restart
development
New
requirements
Client Programmer

Some of the disadvantages of waterfall model
Waterfall Model
Disadvantage of waterfall model
Product
delivered
If client is unhappy with the product, the entire project
cycle is restarted
Client Programmer

Waterfall Model
Product
delivered
cycle is restarted
Client
Client is not
happy with
the product Programmer

Waterfall Model
Product
delivered
cycle is restarted
Client
Client is not
happy with
the product
List of changes
Programmer

Waterfall Model
Product
delivered
cycle is restarted
Client
Client is not
happy with
the product
List of changes
Restart the project
to apply new
changes
Programmer

Waterfall Model
Project will take long
time to start
Until the requirements are not clear, the project
cannot start and is eventually delayed
Client
Unclear requirements
Programmer

Waterfall Model
Using waterfall model, companies soon came to realize
Client requirements
cannot be understood at
once
Software must be delivered
faster and with less
resources
It is very expensive to make
changes during the end of
the project

Client
Client sends his
requirements to the
programmer
Following the Agile model, programmers create prototypes to understand
client requirements
Agile Model
Programmer
Requirements

Client
PrototypeProgrammer creates a
prototype
of the application
Agile Model
client requirements
Requirements

Client
Client receives the
prototype for review
Agile Model
client requirements
Prototype
Requirements

Client
Feedback
Client provides
feedback and list of
changes to be made
Agile Model
client requirements
Prototype

Plan
Code
Test
Review
Plan
Code
Test
Review
Plan
Code
Test
Review
The entire process of building a software is broken down into small
actionable blocks called sprints
Agile Model

Plan
Code
Test
Review
Plan
Code
Test
Review
Plan
Code
Test
Review
The entire process of building a software is broken down into small
actionable blocks called sprints
Agile Model
Sprint 1 Sprint 2 Sprint 3

Workflow of Agile model
Product
backlog
Sprint
planning
Sprint
backlog
Plan
Code
Test
Review
Sprint
Daily scrum
Deliverable
product
Product
review
Agile Model

Developers and operations team
were working in silos
Advantages of Agile model
Client requirements are
better understood because
of the constant feedback
Product is delivered much
faster as compared to
waterfall model
Disadvantages of Agile model
The product gets tested only in
developer computers and not
on production systems
Agile Model

Advantages of Agile model
Client requirements are
better understood because
of the constant feedback
Product is delivered lot
faster as compared to
waterfall model
Disadvantages of Agile model
Agile Model
Developers and operations team
work in silos
The product gets tested only on
developer computers and not
on production systems

Agile Model
Developer Operations
Product
Developer submit the
product to operations team for
deployment
Production
server

Developer
Agile Model
Product
When the product fails in production
servers, the operations team are clueless
and send product back to the development
team
Production
server
Operations
Product

Operations
+
Infrastructure
Agile addressed the gap between
clients and developers
Development
+
Testing
Agile
What is DevOps?
Operations
+
Infrastructure
Development
+
Testing
Client
+
Requirements
DevOps is an evolution from Agile model of software development

DevOps addressed the gap between Developers and Operations
DevOpsAgile
Development
+
Testing
Operations
+
Infrastructure
Development
+
Testing
Client
+
Requirements
What is DevOps?

Client
+
Requirements
Development team will submit the application to the
operations team for implementation
Agile
Operations
+
Infrastructure
Development
+
Testing
What is DevOps?
Application

Client
+
Requirements
Operations team will monitor the application and provide
relevant feedback to developers
Agile
Operations
+
Infrastructure
Development
+
Testing
What is DevOps?
Application
Feedback

DevOps Phases
According to DevOps practices, the workflow in software
development and delivery is divided into 8 phases

In plan stage, business owners
and software development team
discuss project goals and create a
plan
Plan

Plan
Programmers then design and
code the application and use
tools like Git to store
application code
Code

Plan
Build tools like Maven and Gradle, take
code from different repositories and
combine them to build the complete
application
Code
Build

Plan Code
BuildApplication is tested using automation
testing tools like
Selenium and JUnit to ensure
software quality
Testing

Plan Code
Build
When testing is complete, new
features are integrated
automatically to the already
existing codebase
Testing
Integrate

Plan Code
Build
Application is packaged after
release and deployed from
development server to
production server
Testing
Integrate
Production
servers
Deploy

Plan Code
Build
Testing
Integrate
Production
servers
Deploy
Once software is deployed, operations
team perform activities such as configuring
servers and provisioning them with the
required resourcesOperate

Plan Code
Build
Testing
Integrate
Production
servers
Deploy
Operate
App
server
Monitoring
Monitoring allows IT organization to
identify specific issues of specific
releases and understand the impact
on end-users

DevOps Tools
Deploy
Operate
Monitor
Code
Plan
Build
Test
Integrate

Continuous Delivery
Continuous
delivery
CodePlan Build Test

Continuous Integration
Release
Defect / Failure
Repeat the build process
Continuous
integration
TestBuildCodePlan

Continuous
deployment
Monitor Deployment
Success
Release
Defect / Failure
Repeat the build process
Operate
Continuous Deployment
TestBuildCodePlan

DevOps Advantages
Companies which follow DevOps, release more products and features within a short amount of time

DevOps Advantages
Time taken to create and deliver software is reduced

DevOps Advantages
Complexity of maintaining an application is reduced

DevOps Advantages
Improved collaboration between developers and operations team

DevOps Advantages
Improved collaboration between developers and operations team
Continuous integration and delivery ensure faster time to market

Introduction To DevOps | Devops Tutorial For Beginners | DevOps Training For Beginners | Simplilearn

Introduction To DevOps | Devops Tutorial For Beginners | DevOps Training For Beginners | Simplilearn

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