kubernetes - Communication between EKS Cluster Nodes and another EC2 instance running under LoadBalancer

Question

I have an EKS cluster running with 4 nodes. Application on these node calls service running on another EC2 instance via Route 53 -> LoadBalancer. What should be idea way to configure security group in order have traffic flow EKS-Nodes -> Route 53 -> LoadBalancer -> EC2?

question from:https://stackoverflow.com/questions/65881923/communication-between-eks-cluster-nodes-and-another-ec2-instance-running-under-l

Answer 1

You should modify your Load Balancer's security group (in case it's ALB or Classic LB) to allow port 443 from EKS node's security group.

If you're using NLB you should instead modify your application EC2 instances security group.