fluxcoil.net

These are the steps to create the image, based on Miki Shapiros ansible scripts. Some pieces are borrowed from the Nintendo Switch Fed32 setup. The generic raspi4 notes are here.

This guide here installs plain Fedora 32 on the sdcard, but you might want to consider these steps for dualboot with RaspiOS instead. For firmware upgrades, it's probably good to have a usable RaspiOS at the card.

The steps guide to:

• Get Fedora and RaspiOS images
• Copy the first partition of the RaspiOS image to the new sdcard
• Create a second partition
• Copy Fedora to the second partition
• Prepare configfiles for booting Fedora

These steps can be executed on a normal Fedora system, I use Fedora 32 x86_64. Before you start, upgrade the firmware of your Raspi to the latest available versions. The builder for RaspiOS is pi-gen.

# Our directory for storing images etc.
WORKDIR="/home/chris/Downloads/raspi"
# Our output device
OUTDEV="/dev/mmcblk0"

mkdir -p $WORKDIR/mnt/fedora32/root $WORKDIR/mnt/raspbian/root \
  $WORKDIR/mnt/piroot $WORKDIR/mnt/boot

### Fetch and prepare Fedora
cd $WORKDIR
curl http://ftp.riken.jp/Linux/fedora/releases/32/Server/aarch64/images/Fedora-Server-32-1.6.aarch64.raw.xz
xz -dk Fedora-Server-32-1.6.aarch64.raw.xz
kpartx -av Fedora-Server-32-1.6.aarch64.raw
# This created /dev/mapper/loopXp1 (vfat part) and /dev/mapper/loopXp2 (ext4 partition)
vgchange -ay fedora
mount /dev/fedora/root $WORKDIR/mnt/fedora32/root

### Fetch and prepare RaspiOS
curl http://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2020-05-28/2020-05-27-raspios-buster-lite-armhf.zip
unzip 2020-05-27-raspios-buster-lite-armhf.zip
kpartx -av 2020-05-27-raspios-buster-lite-armhf.img
# This created /dev/mapper/loopYp1 (vfat part) and /dev/mapper/loopYp2 (ext4 partition)
mount /dev/mapper/loop1p2 $WORKDIR/mnt/raspbian/root

### Prepare the sdcard
# We copy everything until the end of the boot partition to
# $OUTDEV.  As long as you use the same RaspiOS image, 
# you can stay with these numbers.
( dd if=$WORKDIR/2020-05-27-raspios-buster-lite-armhf.img count=8 bs=524288;
  dd if=$WORKDIR/2020-05-27-raspios-buster-lite-armhf.img bs=524288 skip=8 count=512 ) | dd of=$OUTDEV bs=524288

# Expand partition 2 to span the whole device
parted /dev/mmcblk0 resizepart 2 100%
mkfs.ext4 ${OUTDEV}p2

### copy over the Fedora root filesystem
mount ${OUTDEV}p2 $WORKDIR/mnt/piroot
cd $WORKDIR/mnt/fedora32/root
tar cfp - . | ( cd $WORKDIR/mnt/piroot; tar xfp - )

### Prepare new image
cd $WORKDIR/mnt/piroot

# set your root-password to 'fedora'
sed -ie 's,^root.*,root:$6$g1sdJY/CulQKzQmS$heAUJV60eTr1HQtTTR188WlA/vOTj6LPuKA7JB1wKEgPiW1qX2gPJHU8lLhSL8KeKgx.hGgUvQ4uzW6JQ68u40:18388:0:99999:7:::,' etc/shadow
# As an alternative, execute 'vi etc/shadow' and manually
# change the password hash to something else.
echo 'PermitRootLogin yes' >>etc/ssh/sshd_config

echo pi4.local >etc/hostname
echo '127.0.0.1   pi4.local pi4' >>etc/hosts

# We just need these 2 lines
echo '/dev/mmcblk0p1 /boot vfat defaults,noatime 0 0' >etc/fstab
echo '/dev/mmcblk0p2 /     ext4 defaults,noatime 0 0' >>etc/fstab

# Copy over RaspiOS kernel modules, firmware, modprobe blacklist
cp -urfp $WORKDIR/mnt/raspbian/root/lib/modules      $WORKDIR/mnt/piroot/usr/lib
cp -urfp $WORKDIR/mnt/raspbian/root/lib/firmware     $WORKDIR/mnt/piroot/root/lib
cp -urfp $WORKDIR/mnt/raspbian/root/etc/modprobe.d/. $WORKDIR/mnt/piroot/etc/modprobe.d/
umount $WORKDIR/mnt/raspbian/root

cat >etc/sysconfig/network-scripts/ifcfg-eth0<<EOT
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
IPADDR=192.168.0.4
PREFIX=24
GATEWAY=192.168.0.1
DNS1=8.8.8.8
NAME=eth0
DEVICE=eth0
ONBOOT=yes
AUTOCONNECT_PRIORITY=-999
EOT

# Disable the initial-setup and other unneeded services
rm -f etc/systemd/system/multi-user.target.wants/initial-setup.service
rm -f etc/systemd/system/multi-user.target.wants/abrtd.service
rm -f etc/systemd/system/multi-user.target.wants/abrt-journal-core.service
rm -f etc/systemd/system/multi-user.target.wants/abrt-oops.service
rm -f etc/systemd/system/multi-user.target.wants/abrt-vmcore.service
rm -f etc/systemd/system/multi-user.target.wants/abrt-xorg.service
rm -f etc/systemd/system/multi-user.target.wants/cups.service
rm -f etc/systemd/system/multi-user.target.wants/nfs-client.service
rm -f etc/systemd/system/multi-user.target.wants/vboxservice.service
rm -f etc/systemd/system/multi-user.target.wants/vmtoolsd.service
rm -f etc/systemd/system/multi-user.target.wants/ModemManager.service
rm -f etc/systemd/system/multi-user.target.wants/rngd.service
rm -f etc/systemd/system/multi-user.target.wants/avahi-daemon.service
rm -f etc/systemd/system/multi-user.target.wants/auditd.service
rm -f etc/systemd/system/multi-user.target.wants/smartd.service
rm -f etc/systemd/system/multi-user.target.wants/libvirtd.service
rm -f etc/systemd/system/multi-user.target.wants/remote-fs.service

rm -f etc/systemd/system/sysinit.target.wants/multipathd.service
rm -f etc/systemd/system/sockets.target.wants/multipathd.socket
cd ..

### prepare boot partition
mount ${OUTDEV}p1 $WORKDIR/mnt/boot

vi $WORKDIR/mnt/boot/cmdline.txt
# change 'console=[..]'
# into 'console=serial0,115200 console=tty1 root=PARTUUID=738a4d67-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait'

# Configure the firmware to boot the 64bit kernel, not the 32bit one
# details: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=250730
echo 'arm_64bit=1' >>$WORKDIR/mnt/boot/config.txt

chmod 0755 $WORKDIR/mnt/piroot
umount $WORKDIR/mnt/boot
umount $WORKDIR/mnt/piroot
umount $WORKDIR/mnt/fedora32/root
lvchange -a n fedora
kpartx -dv $WORKDIR/Fedora-Server-32-1.6.aarch64.raw
kpartx -dv $WORKDIR/2020-05-27-raspios-buster-lite-armhf.img

You should now be able to boot from the sdcard and login.

cat >>~/.bashrc<<EOT
# extend prompt to have temperature
export PS1='[\u@\h $(cut -b 1,2 /sys/devices/virtual/thermal/thermal_zone0/temp)°C \W]\$ '
# colored iostat output
export S_COLORS=always
EOT

### tuning
cat >/etc/rc.local<<EOT
#!/usr/bin/bash
# VM writeback timeout
echo '1500' > '/proc/sys/vm/dirty_writeback_centisecs'
# power saving for wlan and usb chips
echo 'auto' > '/sys/bus/pci/devices/0000:01:00.0/power/control'
echo 'auto' > '/sys/bus/pci/devices/0000:00:00.0/power/control'
EOT
chmod +x /etc/rc.local
/etc/rc.local
ln -s /etc/rc.local /etc/rc.d/rc.local

# To get further ideas about services we do not need
systemd-analyze plot >file.svg

# For my use cases:
systemctl disable lmsensors firewalld

# I like gkrellm
dnf -y install gkrellm-daemon sysstat htop
echo 'allow-host 192.168.0.2' >>/etc/gkrellmd.conf 
systemctl enable --now gkrellmd

# update
dnf -y update

• Would be good to get the Fedora kernel running. Upstream 5.6 is said to have the required pieces together, so maybe recompiling the Fedora kernel could work, or even running stock Fedora kernel?
• kexec possible?