AWS: move DB by using Multi-AZ deployment

Move an Amazon RDS DB instance from a public subnet to private subnet in the same VPC

want to move my DB instance from a public to a private subnet within the same VPC, and make my DB instance completely private:

• Avoids the need to create a new DB instance
• Avoids using the snapshot-restore process
• Minimizes the downtime

Enable Multi-AZ on your DB instance

Reboot your DB instance with failover and disable Multi-AZ deployment