DevOps

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What Is Devops

While there are lots of definitions on the Internet, defining DevOps for their benefit, we subscribe to the definition of DevOps provided on https://www.atlassian.com/devops

“DevOps is a set of practices that automates the processes between software development and IT teams, in order that they can build, test, and release software faster and more reliably. The concept of DevOps is founded on building a culture of collaboration between teams that historically functioned in relative siloes.

The promised benefits include increased trust, faster software releases, ability to solve critical issues quickly, and better manage unplanned work.”

DevOps is actually a Collaboration between Software Development (Dev) and the Operations (Ops) Teams, a set of practices, which both the team agree to follow.

 

How did the world of Software Development look like, before the advent of DevOps Functions:

Before DevOps came into being, there was a thick line between the Software Development Teams and the IT Operations Team, who were responsible for the Build, Release and Operations of the code. This worked ok for smaller teams, with very in-frequent releases. However, with the advent of Agile, and more complex Software Development, spread across the globe, fault lines start appearing in this entire process, which widened with time.

The Software Development Teams would develop a piece of code, there were invariable issues with the Build and release of the software, due to missing configurations or libraries

To bridge this gap, Development(‘Dev’) team and Operations (‘Ops’) team collaborated giving rise to DevOps.

What Experience does a DevOps Engineer need to have?

DevOps should be experienced in several open source technologies and have a broad knowledge of the technology used by DevOps engineers.

This includes:
• Agile Project Management
• Cloud Technology
• Container Concepts
• Continuous Integration
• Deployment Automation & Orchestration

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• Infrastructure Automation
• Open Source OS
• Orchestration
• Source Control

One skill that DevOps Engineers need to develop is looking at the big picture. They need to guide the Development Organization on process changes that would accelerate the entire Software Lifecycle and reduce the time to market.

What Processes does the DevOps Encompass

The main goal of DevOps is to increase the quality of the product to a great extent and to increase the collaboration of Development and Operation Teams

DevOps encompasses the following processes
• Continuous Integration
• Continuous Development
• Continuous Testing
• Continuous Deployment
• Continuous Monitoring

What is Continuous Integration

Continuous integration is often the first step down the path toward DevOps maturity.

The Practice of Integrating newly developed code to the existing code base, with no impact on the existing code base is called Continuous Integration
This practice requires a lot of automation to execute Continuous Integration.

The continuous integration process from a DevOps perspective involves checking your code in, compiling it into usable (often binary executable) code and running some basic validation testing.

What is Continuous Delivery

Continuous delivery is the second stage of DevOps. In this stage, the DevOps team adds additional automation and testing to the code so that the code is ready to be deployed either without human intervention or with minimum human intervention.

Continuous delivery is an extension of continuous integration [DevOps stage 2]. It sits on top of continuous integration. When executing continuous delivery, you add additional automation and testing so that you don’t just merge the code with the main code line frequently, but you get the code nearly ready to deploy with almost no human intervention. It’s the practice of having the code base continuously in a ready-to-deploy state.

This approach helps reduce the cost, time, and risk of delivering changes by allowing for more incremental updates to applications in production. A straightforward and repeatable deployment process is important for continuous delivery.

What is Continuous Deployment

Continuous Deployment is the most advanced stage of DevOps Practice. In this stage, the code is deployed in production servers without any human intervention. As there is no human intervention, a pre-requisite to Continuous Deployment is robust testing framework and test cases, end to end automation, etc.

The automation framework needs to be robust enough to handle the newly written code. There are a very small number of companies that are truly practicing continuous deployment. Netflix, Etsy, Amazon, Pinterest, Flicker, IMVU and Google are popular examples of companies doing continuous deployment.

What Tools Are Used in DevOps?

This list continues to grow along with the popularity of DevOps:

  1. Gradle
  2. Git
  3.  Jetkins
  4. Bamboo
  5. Kubernets
  6. Docket
  7. Puppet
  8. Ansible Scripts
  9. Nagios
  10.  Raygun

 

 

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