@Dan_Mckean Thanks a lot. I am looking at Replica Set option to sync the db between EC2 mongodb and EKS mongodb either using Node Port or Load Balancer setup. So I changed the EC2 mongodb deployment to use a keyfile which I assume is a crucial part to communicate with the replica set members. However, I am not sure how to use the keyfile in EKS mongodb deployment ( I am using MongoDB Kubernetes Operator ). Also, the readme doc in the above repo does not have any information on keyfile usage. Kindly advice. Thanks!