Mysql – Does AWS RDS read replication require peering

amazon-vpcamazon-web-servicesMySQLrdsvpc-peering

If you create an RDS instance in one region with a read replica in another (in private VPCs, no public access), is it required to peer the private VPCs for replication to occur or does AWS magically make communication happen in the background?

Best Answer

You don't need a peering connection between VPCs to create a cross region read replica.

You can create a cross-region Read Replica in a VPC from a source DB instance that is not in a VPC. You can also create a cross-region Read Replica that is not in a VPC from a source DB instance that is in a VPC.

References: Official AWS RDS Replica Documentation and my own experience.