Can't access RDS from pods in EKS

Question

I have 2 VPCs, one for my EKS cluster and another for the RDS.
I have established a VPC peering between them, but I still receive errors from my application "connection timed out on port 5432".
It's the same application from my previous EKS cluster that was in the same VPC as the RDS at it worked, so it must be a problem with my peering.

I have followed these [docs](https://docs.aws.amazon.com/vpc/latest/peering/create-vpc-peering-connection.html) in the same region.
I have created the peering and accepted the request, then updated the routing table as documented and finally added the security group of my EKS to the RDS one.

What else should I be doing?

itaied · Accepted Answer

I have referenced the CIDR instead of a security group and it worked.

Oleksii Bebych · Answer

Your applications are running on EKS Nodes. Make sure RDS Security Group allows incoming traffic from EKS Nodes (IPs or SG IDs)

If you have more advanced configurations, as Security Group for Pods, allow RDS incoming traffic from Pod's SG  https://docs.aws.amazon.com/eks/latest/userguide/security-groups-for-pods.html

Can't access RDS from pods in EKS

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