Hello,
I am Prosenjit, an Infrastructure Architect with 12 years of industry experience.
First of all, I want to thank you for the detailed project description. We can create EC2 instances and setup the security group such a way, so that, instances can talk to each other. Post that, we need to setup repo on one EC2 and keep the rpm packages in that. Once done, we can update the repo information to the other EC2 and start using it.
Let's connect to discuss further.
Best regards,
Prosenjit SEN