77. VPC Private Link
To open our applications up to other VPCs we can either:
i. Open the VPC up to the internet. But disadvantages are Security considerations, everything in the public subnet is public and a lot more to manage
ii. Use VPC peering. But disadvantage is we will have to create and manage many different peering relationships.The whole n/w will be accessible. This isnt good if we have multiple applications within VPC.
Opening services in a VPC to another VPC using private link:
i. The best way to expose a service VPC to tens, hundreds or thousands of customer VPCs
ii. Doesn’t require VPC peering, no route tables, NAT, IGWs etc
iii. Requires a n/w load balancer on the service VPC and an ENI on the customer VPC.