Lab 3.5: Blue/Green with CodeDeploy

Skills covered: 3.4.5, 3.4.8, 3.4.11

Mục tiêu

• Lambda blue/green deployment, traffic shifting, automatic rollback

Bước 1: SAM Template

Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: app.handler
      Runtime: python3.12
      AutoPublishAlias: live
      DeploymentPreference:
        Type: Canary10Percent5Minutes
        Alarms:
          - !Ref MyAlarm

Bước 2: Deploy v1 → Deploy v2 (traffic shifting)

• 10% traffic → v2, 90% → v1 → after 5 min → 100% v2

Bước 3: Rollback

• CloudWatch alarm (error > 5%) → deploy buggy v3 → auto rollback

Kiểm tra kiến thức

• Canary vs Linear vs AllAtOnce
• Automatic rollback config
• Lambda alias traffic shifting