DigitalOcean experiments

freebsd-to-gentoo.sh

#!/bin/sh
##########
# usage:
# curl -O -L 'https://gist.github.com/j000/42a75d1402f723038a559047930773bc/raw/freebsd-to-gentoo.sh' && sudo sh freebsd-to-gentoo.sh
##########

if [ $(id -u) -ne 0 ]; then
  echo "This script must be run as root" 1>&2
  exit 1
fi

# confirmation helper
yesno() {
  question=${1:-Do you want to continue}
  while :
    do
    read -p "$question (yes/no): " answer
    case "${answer}" in
      [yY]|[yY][eE][sS]) return 0 ;;
      [nN]|[nN][oO]) return 1 ;;
    esac
  done
}

pkg install -y grub2 wget e2fsprogs nano sha
swapoff -a
echo 'Preparing drive'
# TODO: verify we are not feleting wrong stuff
#=>      40  62914480  vtbd0  GPT  (30G)
#        40       512      1  freebsd-boot  (256K)
#       552   4194304      2  freebsd-swap  (2.0G)
#   4194856  58719664      3  freebsd-ufs  (28G)
# delete boot
gpart delete -i 1 /dev/vtbd0
# delete swap
gpart delete -i 2 /dev/vtbd0
# add bios-boot
gpart add -t \!21686148-6449-6E6F-744E-656564454649 -i 1 -s 2M /dev/vtbd0
# add /boot
gpart add -t linux-data -i 2 -s 1G /dev/vtbd0
# add data partition for data
# TODO do we need it?
gpart add -t linux-data -i 4 /dev/vtbd0
gpart show /dev/vtbd0
yesno 'Does this look ok?' || exit
mkfs.ext3 -L Linux /dev/vtbd0p2
mount -t ext2fs /dev/vtbd0p2 /boot
cd /boot
echo 'Installing grub'
#grub-install --target=x86_64-efi --efi-directory=/boot/grub/x86_64-efi/ --boot-directory=/boot /dev/vtbd0
grub-install /dev/vtbd0
echo 'Downloading latest install image'
wget 'http://distfiles.gentoo.org/releases/amd64/autobuilds/latest-install-amd64-minimal.txt'
latest=$(grep -v -e '^#' latest-install-amd64-minimal.txt | cut -d' ' -f 1)
wget 'http://distfiles.gentoo.org/releases/amd64/autobuilds/'$latest -O install-amd64-minimal.iso
wget 'http://distfiles.gentoo.org/releases/amd64/autobuilds/'$latest'.DIGESTS' -O digests
echo 'Verifing digests'
a=0
grep -qi sha512 digests && grep -q $(sha512 -r install-amd64-minimal.iso) digests && a=1
[ $a -eq 0 ] && grep -qi sha256 digests && grep -q $(sha256 -r install-amd64-minimal.iso) digests && a=1
[ $a -eq 0 ] && grep -qi sha1 digests && grep -q $(sha1 -r install-amd64-minimal.iso) digests && a=1
[ $a -eq 0 ] && echo 'Digest verification failed' && exit 1
rm latest-install-amd64-minimal.txt
rm digests
echo 'Unpacking'
dd if=install-amd64-minimal.iso of=/dev/vtbd0p4 bs=8M
#tar xf install-amd64-minimal.iso
echo 'Configuring grub'
cat >> /usr/local/etc/grub.d/40_custom << EOF
set timeout=90
menuentry "Gentoo Minimal Install iso" --class iso {
  set isofile=/install-amd64-minimal.iso
  # dokeymap
  set cmdline="dolvm doscsi scandelay=2 doload=virtio-pci,ata_piix looptype=squashfs loop=/image.squashfs cdroot"
  loopback loop \${isofile}
  linux  (loop)/isolinux/gentoo \$cmdline root=/dev/ram0 isoboot=\${isofile} init=/linuxrc initrd=gentoo.igz
  initrd (loop)/isolinux/gentoo.igz
}
menuentry "memtest86" {
  set isofile=/install-amd64-minimal.iso
  loopback loop \${isofile}
  linux memtest86
}
menuentry "FreeBSD" {
  set root="(hd0,gpt3)"
  kfreebsd /boot/loader
}
EOF
#echo "DEBIAN: (hd0)   /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive0"
#echo "EXAMPLE: grub-install --device-map=/boot/grub/device.map /dev/vda"
#echo "Our /boot/grub/device.map:"
#cat /boot/grub/device.map
echo "(hd0) /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive0" > /boot/grub/device.map
echo "Making grub config"
grub-mkconfig -o /boot/grub/grub.cfg
yesno 'Ready for reboot?' || exit
reboot