UEFI¶
New in version 17.0.0: (Queens)
Nova supports configuring a UEFI bootloader for guests. This brings about important advantages over legacy BIOS bootloaders and allows for features such as Secure Boot.
Enabling UEFI¶
Currently the configuration of UEFI guest bootloaders is only supported when
using the libvirt compute driver with a libvirt.virt_type
of kvm or qemu or when using the Hyper-V compute driver with certain
machine types. When using the libvirt compute driver with AArch64-based guests,
UEFI is automatically enabled as AArch64 does not support BIOS.
Todo
Update this once compute drivers start reporting a trait indicating UEFI bootloader support.
Configuring a flavor or image¶
Configuring a UEFI bootloader varies depending on the compute driver in use.
Libvirt
UEFI support is enabled by default on AArch64-based guests. For other guest
architectures, you can request UEFI support with libvirt by setting the
hw_firmware_type image property to uefi. For example:
$ openstack image set --property hw_firmware_type=uefi $IMAGE
Hyper-V
It is not possible to explicitly request UEFI support with Hyper-V. Rather, it
is enabled implicitly when using Generation 2 guests. You can request a
Generation 2 guest by setting the hw_machine_type image metadata property
to hyperv-gen2. For example:
$ openstack image set --property hw_machine_type=hyperv-gen2 $IMAGE
