Problem:

The official Zabbix Appliance 8.0.0rc3 VHDX fails to boot on Hyper-V and enters the dracut emergency shell.

The system cannot find its root filesystem (UUID 33fbc092-6b31-47f4-9843-9b22c127fdac).

Diagnostics showed:

• /proc/partitions was empty.

• /sys/class/scsi_host/ and /sys/block/ were empty.

• modprobe hv_storvsc failed in the initramfs environment.

• The hv_storvsc driver was present in the installed system's kernel modules.

Workaround:

Booted a CentOS Stream 10 rescue environment, mounted the appliance filesystem, entered it using chroot, and rebuilt the initramfs for kernel 6.12.0-211.69.1.el10_2.x86_64 using:

dracut --kver 6.12.0-211.69.1.el10_2.x86_64 --add-drivers hv_storvsc --force

After rebuilding the initramfs, the appliance booted successfully under Hyper-V.

Expected behavior:

The official VHDX appliance should boot on Hyper-V without requiring manual initramfs repair.

Actual behavior:

The appliance enters dracut emergency mode because the virtual SCSI disk is not detected during early boot.

Possible cause:

The Hyper-V storage driver is not included in the initramfs shipped with the VHDX appliance.

Please check the initramfs generation process for the 8.0.0rc3 Hyper-V appliance.