School of Basics: CI/CD Explained

Introduction

• Presenter: Raghav
• Topic: CI/CD (Continuous Integration and Continuous Delivery/Deployment)
• Objective: To explain CI/CD in a simple way using real-world examples

Key Concepts

• CI (Continuous Integration):

  • Integration of code by team members into a shared repository.
  • Typically involves daily code check-ins.
  • Utilizes SCM (Source Code Management) tools like Git.
  • Every check-in is validated by:
    • Automated builds
    • Automated unit tests
    • Sometimes automated integration tests
  • Expands from the dev phase to some part of the testing phase.

• CD (Continuous Delivery):

  • Post CI, involves deploying to a production-like environment (QA/Staging).
  • Ensures that code/build is always in a deployable state.
  • Involves environments:
    • Dev environment
    • Test environment
    • Staging (or Pre-production) environment
  • Expands from dev to staging environment.

• Continuous Deployment:

  • Extends CI/CD to include automatic deployment to production.
  • Every passing change through automated tests is deployed to production.
  • Not always practical for every organization but used by those with fast release cycles (e.g., Facebook).

CI/CD Stages and Environments

• Typical stages: Build, Test, Deploy, (Release)

• CI Process:

  • Expands from build stage to part of the testing stage.
  • Involves integration tests in dev and some functional tests in QA.

• CD (Continuous Delivery) Process:

  • Includes CI process and deploys on pre-prod/staging.
  • Ends at deployment stage.

• Continuous Deployment Process:

  • Includes CI/CD and deploys to actual production.
  • Ends at release stage.

• Environment Expansion:

  • CI spans until QA environment.
  • CD spans until pre-prod/staging environment.
  • Continuous Deployment spans until production environment.

DevOps Integration

• DevOps:

  • Complete process including development, operations, and project management.
  • Emphasizes automated and integrated processes.

• CI/CD Pipeline:

  • Chaining of CI/CD processes with automated triggers.
  • Automated triggers link processes sequentially.

Conclusion

• The lecture explains the essential components and processes within CI, CD, and Continuous Deployment.
• Understanding these concepts aids in implementing DevOps practices effectively.
• Audience encouraged to suggest future topics and engage with the content.

Note: This summary captures the key points and phases of CI/CD from the lecture. It's designed as a reference to understand the processes involved in software development and deployment. For any questions or topic suggestions, interaction is encouraged.