Blue-Green Deployment Strategy

Help me implement blue-green deployment for my application.

Environment:
- Platform: [Kubernetes/ECS/VM-based/serverless]
- Load balancer: [ALB/NLB/nginx/Istio]
- Database: [type and migration needs]
- Traffic volume: [requests/second]

Requirements:
1. Infrastructure setup
   - Blue environment
   - Green environment
   - Traffic switching mechanism
   - Shared resources (databases, caches)

2. Deployment process
   - Environment preparation
   - Health verification
   - Traffic switch procedure
   - Rollback procedure

3. Database considerations
   - Schema migration strategy
   - Backward compatibility
   - Data synchronization

4. Automation
   - CI/CD pipeline integration
   - Automated testing before switch
   - Monitoring during switch
   - Automatic rollback triggers

Include:
- Infrastructure-as-code for both environments
- Deployment scripts
- Runbook documentation
- Monitoring dashboards