Force MD and LUKS Auto-Detection
There is a bug in RedHat 7 releases for some systems when md is used that prevents booting. For some reason it does not copy mdadm.conf into the initrd generated by dracut. The fix recommended on the bug page (https://bugzilla.redhat.com/show_bug.cgi?id=1015204) recommends adding rd.md.uuid=<UUID> but that can be alot of work if you have many volumes. In addition, if you cannot paste the UUID then it is hard to type.
To automatically enable md and luks detection, add “rd.auto=1” to the kernel command line. You can see other command line options in the dracut documentation here: https://www.man7.org/linux/man-pages/man7/dracut.cmdline.7.html