Why DEVOPS?

- Shorter development lifecycle and faster innovation

- Improved communication and collabration

- Increased efficiencies

- Reduces cost and IT head count or staff

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Typical Phases of SDLC:

-Requirement

- Analysis

- Design

-Development

- Testing

- Deployment /Monitoring

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WaterFall Model:

It is a project model based on sequential design process.

Challenges:

- High ammount of risks and uncertainity

- Nor good model for complex projects

- poor model for long and ongoing projects

- cannot accomudate chnaging requirments

- Adjusting scope during the lifecyle is not possible

- Integration of all pahses is done at the end

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AGILE:

It is a methodology to build softwares incremently using short iterations of 1 to 4 weeks.

Challenges:

- No involvement of Operations team

- No process of automation to maintain production environment

- Or no tools to automate infrastructure of servers

- if number of servers are increated or have to be increased in an enviromment, no means to automate the process of scaling them and managing them

- Difficult to diagnose and provide report and feedback about the application or product

In agile we concentrate more of development and testing activites and feedback from client

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DEVOPS

To overcome these challages in AGILE, the concept of DEVOPS is introduced.

The union of devTeam and operations team is the core of DEVOPS approach.

DevOps is the process which involves:

- Automation of infrastructure

- Automating all the workflows

- Continously measuring the application performance.

Here we have continous Development, Continous testing, Continous Integration. Conitnous deployment and Continous monitoring.

DEVOPS LIFECYLE involves:

Plan , CODE, build, Test , INTEGRATE , DEPLOY, OPERATE, MONITOR

PRINCIPLES OF DEVOPS

- Continous Integration

- Continous Delivery/Deployment

- Continous Testing

- Continous Monitoring

- Continous Assesment