How to make nutanix community installation image bootable from uefi
Trying to install Nutanix AHV Hypervisor on recent NUC models fails because the nutanix installation image cannot be booted from UEFI BIOS without legacy mode.
This short howto shows a way to create a bootable medium from the downloadable Nutani AHV Installation image, using the EFI components from Centos7.
- Nutanix installation image (ce-2019.02.11-stable.img)
- Centos 7 Installation image (CentOS-7-x86_64-DVD-1810.iso)
- Linux system to perform steps and test via qemu
All steps are executed with UID 0 (root)
Append 40 MB to the existing Nutanix installation image using fallocate (note that the offset represents the size of the image used in this example, might differ in future relases):
fallocate -o 7444889600 -l 40m ce-2019.02.11-stable.img
Create a new partion using (g)parted or cfdisk in the free 40 MB region of the disk image:
cfdisk ./ce-2019.02.11-stable.img
-> Perform steps to create the partition
Map the image into loopback device using kpartx:
kpartx -av ./ce-2019.02.11-stable.img
add map loop0p1 (254:0): 0 14538752 linear 7:0 2048
add map loop0p2 (254:2): 0 81920 linear 7:0 14540800
Format the created 40 mb loopback partition device matching your output with vfat.
mkfs.vfat /dev/mapper/loop0p2
Mount the loopback partition and mount the iso image:
mkdir /nutanix_vfat
mkdir /nutanix_root
mkdir /centos
mount /dev/mapper/loop0p1 /nutanix_root
mount /dev/mapper/loop0p2 /nutanix_vfat
mount -o loop CentOS-7-x86_64-DVD-1810.iso /centos
Copy the needed EFI components from the Centos installation media to the vfat partition:
cp -r /centos/EFI /nutanix_vfat/
Edit the grub.cfg to have following contents (kernel verisons and initrd versions might differ. I did this to work around video garbage issues.
/nutanix_vfat/EFI/BOOT/grub.cfg:
set default="1"
function load_video {
insmod efi_gop
insmod efi_uga
insmod video_bochs
insmod video_cirrus
insmod all_video
}
menuentry 'Nutanix Community Edition AHV (4.4.77-1.el7.nutanix.20190211.279.x86_64) 7 (Core)' --class nutanix --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.4.77-1.el7.nutanix.20190211.279.x86_64-advanced-4d8b0f1e-e014-4058-a050-c6d2ed188094' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 4d8b0f1e-e014-4058-a050-c6d2ed188094
else
search --no-floppy --fs-uuid --set=root 4d8b0f1e-e014-4058-a050-c6d2ed188094
fi
linuxefi /boot/vmlinuz-4.4.77-1.el7.nutanix.20190211.279.x86_64 root=UUID=4d8b0f1e-e014-4058-a050-c6d2ed188094 ro crashkernel=128M rhgb quiet hugepages=0 intel_iommu=on,igfx_off iommu=pt elevator=noop vga=791 vfio_iommu_type1.allow_unsafe_interrupts=1
initrdefi /boot/initramfs-4.4.77-1.el7.nutanix.20190211.279.x86_64.img
}
Umount everything, remove the loopback mappings and enjoy booting nutanix AHV installer from UEFI BIOS without legacy mode.
To test with qemu use something like this:
qemu-system-x86_64 --enable-kvm --bios /usr/share/qemu/OVMF.fd ce-2019.02.11-stable.img -hda -m 15000 -hdb installme.img -hdc installme2.img
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent