Migrate Amazon CloudFront public origins to private VPC origins

This article provides comprehensive guidance on migrating Amazon CloudFront public origins to private VPC origins, enhancing security by removing public endpoints and managing access at the CloudFront layer.

• Strategy 1: Use CloudFront continuous deployment for zero-downtime blue-green migration with rollback capabilities
• Strategy 2: Use CloudFront edge functions with KVS for header-based or weighted traffic routing during migration
• Strategy 3: In-place migration by directly updating cache behaviors; fastest but requires maintenance window
• Strategy 4: For multi-tenant distributions, create new distribution with VPC origins and migrate tenants individually
• Prerequisites include IAM permissions, VPC configuration, HTTPS setup, and regional availability verification
• Monitor CloudWatch metrics, CloudFront logs, VPC Flow Logs, and application logs during migration
• Consider Origin Shield, origin groups, AWS Shield Advanced, and WAF for additional protection
• Clean up temporary resources and verify traffic migration before deleting old configurations

Choose the migration strategy based on your current setup, business needs, and risk tolerance. Strategy 1 (continuous deployment) is recommended for production environments.