I am trying to access AWS Neptune Database from outside VPC (from laptop) with path User -> API Gateway -> VPC Link -> Private Network Load Balancer -> Neptune.
It is similar to the one mentioned below (for RDS). https://aws.amazon.com/blogs/database/access-amazon-rds-across-vpcs-using-aws-privatelink-and-network-load-balancer/
But I get the message : {"message":"Service Unavailable"}.
Security groups : Neptune SG allows ingress on 8182 from SG of NLB
Target group : on TCP 8182 (shows 1 target healthy)
API in API Gateway : route /sparql on method ANY with integration to NLB with VPC Link
Can you please suggest what can be wrong here?
Amazon Neptune is not currently a supported service using AWS
PrivateLink.