Unable to deploy Fedora 30

[Lee Trager]

As a proof of concept I tried to create a Fedora image for MAAS. Curtin fails to install using its internal hooks for two reasons.

1. Fedora no longer installs the kernel package. It is now called kernel-core, kernel is only available as a meta-package.
2. install-grub no longer exists in Fedora. grub2-install must be used instead.

How to create the image

1. Download the image from https://alt.fedoraproject.org/cloud/
2. Load the nbd kernel modules
    sudo modprobe nbd
3. Load the image
    sudo qemu-nbd -c /dev/nbd1 debian-10.0.3-20190815-openstack-amd64.qcow2
4. Mount the root partition
    sudo mount /dev/nbd1p1 /mnt/
5. Mount /sys and /proc so you can chroot in
    sudo mount -o bind /sys /mnt/sys
    sudo mount -o bind /proc /mnt/proc
6. Copy /etc/resolv.conf into the image so DNS works in the chroot
    sudo mv /mnt/etc/resolv.conf /mnt/etc/resolv.conf.bak
    sudo cp /etc/resolv.conf /mnt/etc
7. Chroot in and install additional packages needed by MAAS
    chroot /mnt
    dnf install python-oauthlib bridge-utils grub2-efi-x64-modules efibootmgr lvm2 mdadm
    # Needed to work around part of this bug
    dnf install kernel
    exit
8. Unmount /proc, /sys
    umount /mnt/sys
    umount /mnt/proc
9. Restore /etc/resolv.con
    mv /mnt/etc/resolv.conf.bak /mnt/etc/resolv.conf
10. Create tgz
    tar -czpf Fedora-Cloud-Base-30-1.2.x86_64.tgz -C /mnt .
11. Upload it to MAAS
    maas $PROFILE boot-resources create name=’fedora-30’ architecture=’amd64/generic’ content@=Fedora-Cloud-Base-30-1.2.x86_64.tgz

[Ryan Harper (raharper)]

MAAS can provide kernel config with the correct package names:

kernel:
   fallback-package: 'kernel-core'

Curtin doesn't invoke grub commands directly, rather it calls it's own helper, install_grub.
The distro family is passed in (redhat) in which case curtin does grub2-install + grub2-mkconfig.

I suspect that will work just fine for fedora.

The change that current needs is to add a dnf wrapper around the yum command support it has.