Sidecar Laravel Package

Technical Evaluation

Architecture Fit

• Serverless Integration: Sidecar excels as a serverless extension for Laravel, enabling seamless AWS Lambda integration without requiring external HTTP calls (e.g., API Gateway). This aligns with Laravel’s ecosystem (e.g., Vapor) and reduces latency by avoiding cross-service communication.
• Multi-Language Support: Supports 14+ runtimes (Node.js, Python, Java, Ruby, .NET, etc.), making it ideal for hybrid architectures where PHP handles core logic while other languages handle specialized tasks (e.g., image processing, ML inference).
• Event-Driven Workflows: Enables direct Lambda execution from Laravel routes, jobs, or queues, enabling use cases like:
  • Async image generation (e.g., OG tags).
  • Serverless cron jobs (via Lambda event triggers).
  • Legacy system integration (e.g., calling Java/Python scripts without containers).
• Vapor Synergy: If using Laravel Vapor, Sidecar leverages existing AWS infrastructure (IAM roles, VPC, etc.), reducing setup complexity.

Integration Feasibility

• Laravel-Centric: Designed for Laravel’s service container, Artisan commands, and configuration system (e.g., sidecar.php). Minimal boilerplate for deployment/execution.
• AWS SDK Abstraction: Handles IAM permissions, Lambda packaging, and deployment under the hood, reducing AWS expertise requirements.
• Local Development: Supports local Lambda emulation (via SAM or Docker) for testing, though production dependencies on AWS are unavoidable.
• CI/CD Friendly: Artisan commands (sidecar:deploy, sidecar:warm) integrate naturally with GitHub Actions, CircleCI, or Laravel Forge.

Technical Risk

Key Questions for TPM

1. Use Case Clarity:
   • Are Lambda functions complementary to PHP (e.g., image processing) or replacing PHP logic (e.g., business rules)?
   • Will they be triggered synchronously (e.g., API routes) or asynchronously (e.g., queues)?
2. Performance Requirements:
   • Are cold starts acceptable, or is provisioned concurrency needed?
   • What are the memory/timeout constraints for Lambda functions?
3. Team Skills:
   • Does the team have AWS Lambda experience, or will Sidecar abstract this entirely?
   • Are developers comfortable with multi-language debugging (e.g., Node.js/Python in PHP stack traces)?
4. Cost Model:
   • What is the expected invocation volume? Use AWS Pricing Calculator to estimate costs.
   • Will reserved concurrency be needed to prevent throttling?
5. Deployment Strategy:
   • Should Lambda functions be versioned for rollback capability?
   • How will environment-specific configurations (e.g., dev/staging/prod) be managed?
6. Monitoring:
   • Will CloudWatch Logs be sufficient, or is custom metrics (e.g., Prometheus) needed?
   • How will Lambda errors be surfaced to Laravel’s monitoring (e.g., Sentry)?

Integration Approach

Stack Fit

• Laravel 9–12: Officially supported. Leverages Laravel’s service provider, Artisan, and configuration systems.
• AWS SDK v3: Under the hood, ensuring compatibility with modern AWS APIs.
• Composer: Zero global dependencies; installs as a Laravel package.
• PHP 8.1+: Required for modern Laravel features (e.g., attributes, typed properties).

Migration Path

# Example GitHub Actions step
- name: Deploy Lambda Functions
  run: php artisan sidecar:deploy --activate --pre-warm

| Monitoring | Integrate CloudWatch Logs with Laravel’s logging (e.g., monolog). Use SettledResult to capture Lambda errors in PHP. | | Rollout | Deploy to staging first, then canary release to production (e.g., route traffic via Laravel’s queue:work). |

Compatibility

• Laravel Services: Functions can be injected into Laravel’s container like any other service.
• Queues/Jobs: Execute Lambda functions from queued jobs for async processing:

  Dispatch(new ProcessImage($imageId))->onQueue('lambda');
  

• Testing: Supports Pest/PHPUnit via mocking LambdaFunction or using local Lambda emulation (e.g., Docker + SAM).
• Environment Isolation: Use sidecar.env config to avoid namespace collisions in shared AWS accounts.

Sequencing

1. Configure AWS:
   • Run php artisan sidecar:configure to set up IAM roles.
   • Ensure S3 bucket for deployments exists (Sidecar creates it if missing).
2. Define Functions:
   • Create LambdaFunction classes in app/Sidecar/ (e.g., OgImage.php).
   • Place runtime files (e.g., resources/lambda/image.js).
3. Deploy:
   • Test locally with php artisan sidecar:deploy --dry-run.
   • Deploy to staging: php artisan sidecar:deploy --activate --pre-warm.
4. Integrate:
   • Call functions from routes, jobs, or commands:

     $result = OgImage::execute(['text' => 'Hello']);
     

5. Monitor:
   • Set up CloudWatch Alarms for errors or throttling.
   • Log Lambda outputs to Laravel’s log channels.

Operational Impact

Maintenance

• Artifact Management:
  • Sidecar packages and versions Lambda functions automatically. Use sidecar:sweep to clean up old versions.
  • Dependency Updates: Monitor for breaking changes (e.g., runtime deprecations). Example:

    // Explicitly set runtime to avoid auto-updates
    public function runtime(): string { return 'nodejs20.x'; }
    

• Configuration Drift:
  • Use Laravel’s config caching (config:cache) to avoid runtime config reloads.
  • Store environment-specific Lambda settings in .env (e.g., SIDECAR_RUNTIME_MEMORY=512).

Support

• Debugging:
  • Lambda stack traces are available via SettledResult::errorAsString().
  • Use sidecar:logs to stream CloudWatch logs:

    php artisan sidecar:logs OgImage
    

• Common Issues:

  Issue	Resolution
  Cold Starts	Use --pre-warm in deploy or set provisioned concurrency in AWS Console.
  Permission Denied	Re-run sidecar:configure or check IAM policies.
  Timeout Errors	Increase Lambda timeout or optimize runtime code.
  Deployment Failures	Check S3 bucket permissions or Lambda quotas.
  Runtime Mismatch	Explicitly set runtime() in LambdaFunction class.

Scaling

• Concurrency:
  • Lambda scales automatically, but set reserved concurrency to avoid throttling