How can we create Redhat official Lab images for RH-124 & RH-134 on RHEL8, VMDK file for VMware Workstation? Can someone guide?
You can make your own VMs as that will also assist you in learning. If you need the Kerberos and LDAP parts you can check out this video below from Sander van Vugt. I used his books and videos to pass my RHCSA last year and using them to study for my RHCE right now. The video is shown using CentOS 7 so I don't know if the IPA install and config has changed much if any in RHEL 8. I know he's working on a RHEL 8 RHCSA/RHCE courses but since CentOS 8 is not out yet I don't know when he will have them ready.