Unattended and automatically install OS on many Dell servers at once

Hi,

I'm wondering how to deploy OS (distribution of Linux) on multiple Dell PowerEdge servers at once?

First about I'm thinking is by IDRAC of course and OME, but it seems more complicated with specific setting of server DHCP with NFS Share and specific switch. May I ask for guide or something?

Second option about I'm thinking is use opensource tools like terraform or ansible. But how to deal it with Dell Servers.

Maybe someone could help me. Let's assume that servers are connected to network and available by IDRAC, what's next?

Regards