2.3. Implementing CI/CD for Applications with AWS Developer Tools
š” First Principle: Every code change should flow through an automated pipeline ā from commit to production ā with testing at every stage. Manual deployments are the enemy of reliability.
What happens when a developer pushes directly to production without CI/CD? One bad commit takes down a live application, and there's no automated way to roll back. AWS provides a suite of tools ā CodeCommit, CodeBuild, CodeDeploy, CodePipeline ā that chain together to create automated, repeatable, auditable deployment pipelines.
Think of CI/CD like an assembly line ā similar to how Toyota revolutionized manufacturing: raw materials (code) enter one end, get tested and assembled at each station (build, test, staging), and only finished products (validated releases) reach customers. If any station detects a defect, the line stops. Without this automation, every deployment is a manual, error-prone gamble.
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The DVA-C02 tests your ability to configure and troubleshoot this pipeline ā expect questions about buildspec.yml, appspec.yml, deployment strategies, and pipeline stage failures.
