DevOps KeyPrinciples CICD.

In my earlier post I explained what is DevOps ? In this artcile I ll touch upon two important concepts of devops Continuous Integration /Continuous delivery.

Continuous Integration: – Agile in practice:

“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.”

  

The value that Continuous Integration brings to the table is that it forces developers and team of developers to integrate their individual work with each others as early as possible. This exposes integration issues and conflicts on a regular basis.

Principles of CI

• Maintain a Single Source Repository
• Automate the Build
• Make Your Build Self-Testing
• Everyone Commits To the Mainline Every Day
• Every Commit Should Build the Mainline on an Integration Machine
• Keep the Build Fast
• Test in a Clone of the Production Environment
• Make it Easy for Anyone to Get the Latest Executable
• Everyone can see what's happening
• Automate Deployment

Continuous Delivery – Extending Agile beyond Development:

Continuous Delivery takes Continuous Integration step further. After the application is built, at the end of every Continuous Integration build, deliver it to the next stages in the application delivery lifecycle. Deliver it to the QA team for testing and then to the operations team (the Ops in DevOps) for delivery to the production system. The goal of Continuous Delivery is to get the new features that the developers are creating, out to the customers and users as soon as possible. The goal being to Ensure applications are production-ready throughout the lifecycle and can be released at any time while minimizing rollback due to quality issues

Principles of CD

• Validate on more production-like conditions earlier
• Automate hand-offs/promotions to increase velocity through the different stages
• Standardization on processes and assets between Dev and Ops
• Automated monitoring and dashboarding of quality and performance against service level agreements at multiple stages