Leapp upgrade fail with error "Inhibitor: Detected loaded kernel drivers which have been removed in RHEL 8. Upgrade cannot proceed."

Environment

• Red Hat Enterprise Linux 7
• VMware Guest
• leapp

Issue

• Leapp upgrade fails with error as "Inhibitor: Detected loaded kernel drivers which have been removed in RHEL 8. Upgrade cannot proceed."

  Risk Factor: high (inhibitor)
  Title: Detected loaded kernel drivers which have been removed in RHEL 8. Upgrade cannot proceed.
  Summary: Support for the following RHEL 7 device drivers has been removed in RHEL 8: 
   - floppy
   - pata_acpi
  

Resolution

1. Backup the initramfs being currently used for booting

   # cp /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.backup
   

2. Build a generic initramfs containing all drivers

    # dracut -N -f
   

3. Stop the system

     # shutdown
   

4. On the VMWare Hypervisor side, change the SCSI Controller type

   In "VM Hardware" pane, click on "Edit" button, then "SCSI Controller x" and choose "VMware Paravirtual" in "Change Type".

5. (Optional but recommended) On the VMWare Hypervisor side, upgrade the hardware level

   Right-click on the VM, then choose "Compatibility" then "Upgrade VM compatibility" and select "ESXi 7.0 update 3 or later" as a minimum.

6. Boot the system and once booted run following

   # dracut -f --regenerate-all
   

Root Cause

• The controller types are deprecated, see the Hardware Enablement: Rmoved Device Drivers documentation
• The VMware guest was using "LSI Logic Parallel" for "SCSI controller 0" in Hardware settings.

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