Worklog Week 11

Week 11 Objectives:

  • Participate in AWS Cloud Mastery Series #2 to continue resolving specialized technical issues.
  • Architecture Refactoring: Decompose the monolithic template.yaml into a Multi-Stack architecture (Nested Stacks) to reduce “Blast Radius” and improve deployment speed.
  • Dependency Optimization: Implement Lambda Layers to share common code and reduce deployment package size.
  • Pipeline Stability: Fix circular dependencies and export/import errors in CloudFormation.

Tasks to be Deployed This Week:

DayTaskStart DateCompletion DateResources
Sun- Participate in AWS Cloud Mastery Series #2 (Nov 17th): - Researched “Strangler Fig” and “Fan-out” patterns from AWS Cloud Mastery resources to apply to the refactoring process.17/11/202417/11/2024Mentor, AWS Cloud Mastery Series
Mon- Stack Strategy- Split the monolith into logical stacks:
1. Core-Infra: VPC, Security Groups (Stable/Static).
2. Data-Stack: DynamoDB, S3 Buckets (Stateful).
3. App-Stack: Lambda, API Gateway (Stateless/High Churn).		18/11/202418/11/2024
Tue- Pipeline Fixes- Critical Bug: Hit a “Circular Dependency” error where Stack A referenced Stack B, and B referenced A.
- Fix: Refactored parameter passing and removed bidirectional references by using SSM Parameter Store for runtime configuration.		19/11/2024
Wed- Extracted heavy libraries (boto3, requests, Pillow) into a shared Lambda Layer.
- Result: Reduced individual function code size from 10MB to <50KB, significantly improving cold start times.		20/11/202420/11/2024Optimization
Thu- Stabilization- Finalized the deployment script (deploy.sh) to orchestrate the stack creation order.
- Synced the Frontend codebase to align with the new API Gateway IDs.		21/11/2024
Fri- Team Meeting and Project Stabilization: Held a team meeting to review the new Frontend structure, stabilize the main project Stack, and synchronize the fixes for CORS and basic template errors.
- Cross-Stack Refs		- Utilized AWS::CloudFormation::Stack to nest templates.
- Configured Outputs and Fn::ImportValue to pass resource IDs		22/11/202422/11/2024

Week 11 Achievements:

  • Participated in AWS Cloud Mastery Series #2, gaining deeper knowledge of Serverless, Rekognition, and solutions for authorization errors.
  • Successfully migrated to a Multi-Stack Architecture, isolating stateful resources (DB) from stateless code (Lambda). This prevents accidental database deletion during code updates.
  • Reduced deployment time by allowing independent updates to the Application Stack.
  • Eliminated code duplication across functions using Lambda Layers.
  • Developed a separate stack for backup/optimization, enhancing project flexibility and safety during future major updates.