Hello Chris, Sorry for the very late response. On 5/27/21 9:25 PM, Chris Murphy wrote: > Hi, > > Fedora Cloud SIG have a couple of related issues, create images using > GPT [1] and create images supporting UEFI boot [2]. What we'd like to > do is create a single set of images that are UEFI and BIOS bootable, > out of the box. And I'm wondering if this is possible in Anaconda now, > or if it could easily be enhanced to make it possible via kickstart? > I don't think is possible with the Anaconda UI but it's certainly via kickstart. And that is exactly what RHEL/CentOS does for cloud images: https://gitlab.com/redhat/centos-stream/release-engineering/kickstarts/-/blob/main/CentOS-Stream-9-kvm-x86_64.ks > If the image creation environment is BIOS, grub2-install will populate > LBA 0 and BIOS Boot partitions correctly. But I'm uncertain whether > anaconda will create and mount /boot/efi, i.e. if the kickstart > manually creates an ESP mounting it at /boot/efi, will anaconda resist > due to the environment being BIOS? The installation of grub2-efi-* > RPMs should work though. We probably don't need efibootmgr to run, we > can just expect BOOTX64.EFI fallback to discover there isn't an nvram > entry, and add one. And due to Fedora 34 unified grub feature, a > single /boot/grub2/grub.cfg should work whether UEFI or BIOS boot. > Yes, relying on the default EFI boot behavior is completely reasonable. > If the image creation environment is UEFI, grub2-install doesn't work, > it'll detect UEFI and it'll fail. And thus no BIOS bootloader can be > installed. Maybe we could do a UEFI installation, additionally > creating BIOS Boot partition, and run a post install script that does > `grub2-install --target=i386-pc` to add the BIOS bootloader? > > Thoughts? > You could do it either way with a custom quickstart, doing a BIOS install and add the EFI bits on top or do an EFI install and add the BIOS bits. I *think* the CentOS-Stream-9-kvm-x86_64.ks shared above could work for either case. > > [1] > https://pagure.io/cloud-sig/issue/330 > [2] > https://pagure.io/cloud-sig/issue/309 > Best regards, -- Javier Martinez Canillas Software Engineer New Platform Technologies Enablement team RHEL Engineering _______________________________________________ Anaconda-devel-list mailing list Anaconda-devel-list@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/anaconda-devel-list
