On Wed, Apr 10, 2024 at 12:29 PM Angus Clarke <angus@ajct.uk> wrote:

Hi Gianluca

The software is free from HPE but requires a login, I've shared a link separately.

Thanks for taking an interest

Regards

Angus

Apart from other considerations we are privately sharing, in my env that is based on Cascade Lake cpu on the host, with local storage domain on filesystem, the appliance is able to boot and complete the initial configuration phase using your settings: Chipset i440FX w/Bios for the IDE disk type, OS: RHEL7 x86_64. In my env graphics protocol=VNC, video type=VGA

The constraint for your tweaks is caused by the appliance's operating system where all the virtio modules are compiled as modules and they are not included into the initramfs. 

So the system doesn't find the boot disk if you set it as virtio or virtio-scsi.

The layout is of bios type with one partition for /boot and other filesystems on LVM, / included.

To modify the qcow2 image you can use some tools out there, or use manual steps this way:

. connect the disk to an existing rhel 7 / CentOS 7 helper VM where you have lvm2 package installed

In my case my VM has one disk named /dev/sda and the HPE qcow2 disk when added is then seen as /dev/sdb and its partitions as /dev/sdb1, ...

IMPORTANT: change the disk names below as it appears the appliance disk in your env, otherwise you risk to compromise your existing data!!!

IMPORTANT: inside the appliance disk there is a volume group named vg01. Verify there is no vg01 volume group already defined in your helper VM otherwise you get into troubles

. connect to the helper VM as root user

. the LVM structure of the added disk (PV/VG/LV) should be automatically detected

run the command "vgs" and you should see vg01 volume group listed

run the command "lvs vg01" and you should see some logical volumes listed

. mount the root filesystem of the appliance disk on a directory in your helper VM (on /media directory in my case)

# mount /dev/vg01/lv_root /media/

. mount the /boot filesystem of the appliance disk under /media/boot

# mount /dev/sdb1 /media/boot/

. mount the /var filesystem of the appliance disk under /media/var

# mount /dev/vg01/lv_var /media/var/

. chroot into the appliance disk env

# chroot /media

. create a file with new kernel driver modules you want to include in the new initramfs

# vi /etc/dracut.conf.d/virtio.conf

its contents have to be this one line below (similar to the already present platform.conf):
# cat /etc/dracut.conf.d/virtio.conf
add_drivers+="virtio virtio_blk virtio_scsi"

. backup the original initramfs

# cp -p /boot/initramfs-3.10.0-1062.1.2.el7.x86_64.img /boot/initramfs-3.10.0-1062.1.2.el7.x86_64.bak

. replace the initramfs

# dracut -fv /boot/initramfs-3.10.0-1062.1.2.el7.x86_64.img 3.10.0-1062.1.2.el7.x86_64
...
*** Creating image file done ***
*** Creating initramfs image file '/boot/initramfs-3.10.0-1062.1.2.el7.x86_64.img' done ***
#

. verify the new contents include virtio modules

# lsinitrd /boot/initramfs-3.10.0-1062.1.2.el7.x86_64.img | grep virtio
-rw-r--r--   1 root     root         7876 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/block/virtio_blk.ko.xz
-rw-r--r--   1 root     root        12972 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/char/virtio_console.ko.xz
-rw-r--r--   1 root     root        14304 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/net/virtio_net.ko.xz
-rw-r--r--   1 root     root         8188 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/scsi/virtio_scsi.ko.xz
drwxr-xr-x   2 root     root            0 Apr 10 21:14 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/virtio
-rw-r--r--   1 root     root         4552 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/virtio/virtio.ko.xz
-rw-r--r--   1 root     root         9904 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/virtio/virtio_pci.ko.xz
-rw-r--r--   1 root     root         8332 Sep 30  2019 usr/lib/modules/3.10.0-1062.1.2.el7.x86_64/kernel/drivers/virtio/virtio_ring.ko.xz

. exit the chroot environment

# exit

. Now you exited from the chroot env, umount the appliance disk filesystems
# umount /media/var /media/boot
# umount /media

. disconnect the disk from the helper VM

. create a Red Hat 7.x VM in your oVirt/OLVM env as Q35 / Bios VM with the appliance disk configured as virtio or virtio-scsi disk

. boot the VM and it should work, apart from the current problem of the display in your env

Eventually if it boots ok and at the end it works, push HPE to add virtio modules that are quite the standard for disk in Qemu/KVM based env.

The virtio network starts already ok because it is activated after boot as a module and it is not needed in the initrd phase but only after it.

Gianluca