pxeboot/create_pxeinitrd.sh

181 lines
5.1 KiB
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Executable File

#!/bin/bash
set -Eeuxo pipefail
TMP_DIR=${TMP_DIR:=$PWD}
MNT_DIR=$TMP_DIR/newroot
INITRD_DIR=$TMP_DIR/initramfs
RESULT_DIR=$TMP_DIR/files
KERNEL_DIR=$RESULT_DIR/kernel
[[ -d $MNT_DIR ]] || mkdir -p $MNT_DIR
[[ -d $INITRD_DIR ]] || mkdir -p $INITRD_DIR
[[ -d $RESULT_DIR ]] || mkdir -p $RESULT_DIR
[[ -d $KERNEL_DIR ]] || mkdir -p $KERNEL_DIR
# Configs overwritable via environment variables
ROOTPASSWD=${ROOTPASSWD:='$6$LmI1TuCG$YRTAdn/Ht7v1kNdkb8HFXV4S7Sau571DD3kaBWltX72OSo21P7ON9JRw4XepjsBQ0FzzBebfsdQ4YfH9M2CaN0'} ## wit
RELEASE=${RELEASE:=unstable}
FLAVOUR=${FLAVOUR:=debian} # Either 'debian' or 'ubuntu'
INCLUDES=${INCLUDES:="openssh-server,init,curl,parted,xz-utils,vim,locales-all,less,dmidecode,iputils-ping,fping,tcpdump,rsync,ethtool,lldpd,iproute2,net-tools,sudo,gnupg,tcpdump,mtr-tiny,ifupdown,ipmitool,iptables,telnet,netcat,bridge-utils,vlan,ifstat,ncurses-term,wget,pciutils,dhcpcd5,python,efibootmgr,busybox-static,firmware-qlogic"}
MIRROR=${MIRROR:="https://mirrors.wit.com/debian"}
DEBCORE_INCLUDES=${DEBCORE_INCLUDES:="wit-start-me-up"}
fail() {
echo ""
echo "FAILED: $1"
exit 1
}
cancel() {
fail "CTRL-C detected"
}
trap cancel INT
if [ $FLAVOUR == "debian" ]; then
BOOT_PKG="linux-image-$ARCH"
elif [ $FLAVOUR == "ubuntu" ]; then
BOOT_PKG="linux-image-generic"
fi
###################
## build root fs ##
###################
echo "Installing Debian $RELEASE..."
debootstrap --variant=minbase --components=main,contrib,non-free --include=$INCLUDES,$BOOT_PKG $RELEASE $MNT_DIR $MIRROR || fail "cannot install $RELEASE"
echo localhost > $MNT_DIR/etc/hostname
cat <<EOF > $MNT_DIR/etc/hosts
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
EOF
echo "ipv4: \4 ipv6: \6" >>$MNT_DIR/etc/issue
rm -f $MNT_DIR/etc/apt/sources.list
echo 'deb https://mirrors.wit.com/debian sid main contrib non-free' > $MNT_DIR/etc/apt/sources.list
echo 'deb https://mirrors.wit.com/debcore sid main experimental' >> $MNT_DIR/etc/apt/sources.list
curl https://mirrors.wit.com/debcore/public.key | LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-key add -
LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-get update
LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-get install $DEBCORE_INCLUDES
LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-get clean
cat /dev/null > $MNT_DIR/etc/machine-id
mkdir -p $MNT_DIR/root/.ssh
echo ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDd7rLlS1NmTpBr5KP5ryuA/euGD8I6uc2RCg4sCIlvH0FhEPb123QuMVImHi23ftVP61cKZXm8MlTtAoLHduYtGMHCkJWAAkiIpPetAP2KPIpuadtgIS8xuD/TCYjl0xNXLh0M1C7i7HOnTd8yr+3QNjUppyDdKjLvMQbPWZZTU5rt7CYoGlrxHjieCkq9jj8kRjRARUaAJ4DHEgMFUDIcq3JYluzzkgPK/JFwoq/IokVQCr5qfQRwr3SCkD4sIuGTj+J67uzabIr/xDBqlrMW3T+7YfY12ciHpijob+l7xESkJ+6Gxh56z8llBkGiVyh3UqnmW4MvfuAA/D3Dzhwr afrank@adams-mbp.lan > $MNT_DIR/root/.ssh/authorized_keys
cat <<EOF >$MNT_DIR/etc/dhcpcd.conf
hostname
duid
slaac hwaddr
noipv4ll
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes, ntp_servers, interface_mtu
require dhcp_server_identifier
EOF
chroot $MNT_DIR usermod -p "${ROOTPASSWD}" root
chroot $MNT_DIR ssh-keygen -q -f /root/.ssh/id_rsa -C root@pxeboot -N ""
echo "### public ssh key for root of this install"
cat $MNT_DIR/root/.ssh/id_rsa.pub
##################
## build initrd ##
##################
mkdir -p $INITRD_DIR/bin
cp $MNT_DIR/bin/busybox $INITRD_DIR/bin/busybox
cat <<-"EOF" >$INITRD_DIR/init
#!/bin/busybox sh
# Dump to sh if something fails
error() {
echo "Jumping into the shell..."
setsid cttyhack sh
}
# Populate /bin with binaries from busybox
/bin/busybox --install /bin
mkdir -p /proc
mount -t proc proc /proc
mkdir -p /sys
mount -t sysfs sysfs /sys
mkdir -p /sys/dev
mkdir -p /var/run
mkdir -p /dev
mkdir -p /dev/pts
mount -t devpts devpts /dev/pts
# Populate /dev
mdev -s
mkdir -p /newroot
mount -t tmpfs -o size=${size:=10000}m tmpfs /newroot || error
echo "Extracting rootfs... "
xz -d -c -f rootfs.tar.xz | tar -x -f - -C /newroot || error
mount --move /sys /newroot/sys
mount --move /proc /newroot/proc
mount --move /dev /newroot/dev
exec switch_root /newroot /sbin/init || error
EOF
chmod +x $INITRD_DIR/init
XZ_OPT=-T0 tar -cJf $INITRD_DIR/rootfs.tar.xz -C $MNT_DIR .
#[ -d /usr/lib/linux-image-* ] && cp -r $MNT_DIR/usr/lib/linux-image-* $RESULT_DIR/dtbs
rm $MNT_DIR/boot/initrd.img-*
mv $MNT_DIR/boot/vmlinuz-* $KERNEL_DIR/vmlinuz-$ARCH
cd $INITRD_DIR
find . -print0 | cpio --null -ov --format=newc | gzip -9 > $KERNEL_DIR/initramfs-$ARCH.gz
cd -
apt-get update
if [[ $ARCH = amd64 ]]
then
apt-get -y install grub-common grub-efi-$ARCH-bin grub-pc-bin
grub-mknetdir --directory=/usr/lib/grub/i386-pc/ --net-directory=$RESULT_DIR/
grub-mknetdir --directory=/usr/lib/grub/x86_64-efi/ --net-directory=$RESULT_DIR/
else
apt-get -y install grub-common grub-efi-$ARCH-bin
grub-mknetdir --net-directory=$RESULT_DIR/
fi
rm -rf $RESULT_DIR/boot/grub/locale/ $RESULT_DIR/boot/grub/fonts/
ls -la $RESULT_DIR/
exit 0