Creating A Local Yum Repository(CentOS) & MySQL Cluster

I am setting up mysql cluster on CentOS in private network. I do not want to expose my mysql cluster to internet. What is the best way to provide security updates for CentOS, which has mysql cluster nodes:

Have a local repository, Creating A Local Yum Repository(CentOS) , so that CentOS nodes hosting mysql cluster can only access local repository and no internet?

Any other way to implement this?

thnx.

 

Yes, you can try this.