Prompt

Implement blue-green deployment strategy.

<application>
{application architecture details}
</application>

<infrastructure>
{load balancers, databases, etc}
</infrastructure>

<zero_downtime_requirements>
{SLA and user expectations}
</zero_downtime_requirements>

Implement:
1. Environment duplication
2. Traffic switching strategy
3. Database handling
4. Session management
5. Validation procedures
6. Rollback automation