I work in a small office with, maybe, 15 workstations and a server that I've recently deployed running Ubuntu Server 20.04. I discovered some redundunt servers that makes me think about creating a cluster for performance and safety. I'm thinking of creating a cluster of 3 servers, 1 master and 2 nodes. And the questions are:
- Do all three of them have to have the same OS (Ubuntu Server 20.04 in my case) and the same configuration of software (Apache, PHP, MySql) or maybe the 2 nodes have to be exactly the same and the master can have only the software for managing the nodes?
- The IP that router poins to the server in port 80 is the IP of the master or the 1st node?
Thanks in advance and excuse my english