I have an RDS PSQL Database which is open to all connections as shown in the screenshot attached below and it is also in the same VPC as my EKS Cluster which is also visible.
I am running a rails app in my EKS cluster and trying to create a Database and have already set my RDS Cluster end-point in Environment Variables.
Command I am using: kubectl exec -it pod/app-b65785bd5-r8mpj -- bundle exec rails db:create
Both EKS CLuster and RDS are in the same VPC vpc-0f9737b08c3269c4d and I also White-listed the EKS Cluster IP Address in the Security Group of RDS Cluster Database following is the error I am getting.
Given that your RDS hostname resolved to 10.0.2.75 most likely your VPC CIDR range is 10/16. Modify inbound rules in your DB SG to allow traffic from 10.0.0.0/16
