221 lines
5.2 KiB
Bash
Executable File
221 lines
5.2 KiB
Bash
Executable File
#!/bin/bash
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set -Eeuxo pipefail
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SIZE=10000
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HOSTNAME=localhost
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RELEASE=unstable
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TMP_DIR=$PWD
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MNT_DIR=$TMP_DIR/newroot
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RESULT_DIR=${RESULT_DIR:=$TMP_DIR/files}
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# Configs overwritable via environment variables
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FLAVOUR=${FLAVOUR:=debian} # Either 'debian' or 'ubuntu'
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INCLUDES=${INCLUDES:="openssh-server,init,curl,parted,xz-utils,vim,locales-all,less,ceph-common,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,dhcpcd5"}
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MIRROR=${MIRROR:="https://mirrors.wit.com/debian"}
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ARCH=${ARCH:=amd64}
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fail() {
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echo ""
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echo "FAILED: $1"
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exit 1
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}
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cancel() {
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fail "CTRL-C detected"
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}
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trap cancel INT
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mkdir $MNT_DIR
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if [ $FLAVOUR == "debian" ]; then
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BOOT_PKG="linux-image-$ARCH"
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elif [ $FLAVOUR == "ubuntu" ]; then
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BOOT_PKG="linux-image-generic"
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fi
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###################
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## build root fs ##
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###################
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echo "Installing Debian $RELEASE..."
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debootstrap --variant=minbase --include=$INCLUDES,$BOOT_PKG $RELEASE $MNT_DIR $MIRROR || fail "cannot install $RELEASE"
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echo $HOSTNAME > $MNT_DIR/etc/hostname
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cat <<EOF > $MNT_DIR/etc/hosts
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127.0.0.1 localhost
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# The following lines are desirable for IPv6 capable hosts
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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EOF
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rm -f $MNT_DIR/etc/apt/sources.list
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echo 'deb https://mirrors.wit.com/debian sid main contrib non-free' > $MNT_DIR/etc/apt/sources.list
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echo 'deb https://mirrors.wit.com/debcore sid main' >> $MNT_DIR/etc/apt/sources.list
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curl https://mirrors.wit.com/debcore/public.key | LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-key add -
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LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-get update
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LANG=C DEBIAN_FRONTEND=noninteractive chroot $MNT_DIR apt-get clean
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cat /dev/null > $MNT_DIR/etc/machine-id
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sed -i '/PasswordAuthentication/d' $MNT_DIR/etc/ssh/sshd_config
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echo "PasswordAuthentication no" >>$MNT_DIR/etc/ssh/sshd_config
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mkdir -p $MNT_DIR/root/.ssh
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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
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cat <<EOF > $MNT_DIR/etc/systemd/system/start-me-up.service
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[Unit]
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Description=WIT System Startup
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Wants=network-online.target
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After=network-online.target
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[Service]
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Type=oneshot
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ExecStart=/usr/local/bin/start_me_up.sh
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RemainAfterExit=true
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ExecStop=/usr/local/bin/shut_me_down.sh
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StandardOutput=journal
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[Install]
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WantedBy=multi-user.target
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EOF
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cat <<EOF > $MNT_DIR/usr/local/bin/start_me_up.sh
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#!/bin/bash
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eval "kernel_args=( \$(cat /proc/cmdline) )"
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for i in "\${kernel_args[@]}"
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do
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if [ \${i:0:4} = exec ]
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then
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export -- "\$i"
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fi
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done
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echo \$execstartup
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eval \$execstartup
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EOF
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cat <<EOF > $MNT_DIR/usr/local/bin/shut_me_down.sh
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#!/bin/bash
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eval "kernel_args=( \$(cat /proc/cmdline) )"
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for i in "\${kernel_args[@]}"
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do
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if [ \${i:0:4} = exec ]
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then
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export -- "\$i"
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fi
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done
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echo \$execshutdown
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eval \$execshutdown
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EOF
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cat <<EOF >$MNT_DIR/etc/dhcpcd.conf
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hostname
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duid
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slaac hwaddr
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noipv4ll
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option domain_name_servers, domain_name, domain_search, host_name
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option classless_static_routes, ntp_servers, interface_mtu
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require dhcp_server_identifier
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EOF
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chmod +x $MNT_DIR/usr/local/bin/start_me_up.sh
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chmod +x $MNT_DIR/usr/local/bin/shut_me_down.sh
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chroot $MNT_DIR systemctl enable start-me-up || fail "failed to enable start-me-up"
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#echo "Enter root password:"
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#while ! chroot $MNT_DIR passwd root
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#do
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# echo "Try again"
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#done
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##################
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## build initrd ##
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##################
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mkdir -p $TMP_DIR/initramfs/bin
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wget -O $TMP_DIR/initramfs/bin/busybox https://www.busybox.net/downloads/binaries/1.26.1-defconfig-multiarch/busybox-x86_64
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chmod +x $TMP_DIR/initramfs/bin/busybox
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cat <<-"EOF" >$TMP_DIR/initramfs/init
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#!/bin/busybox sh
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# Dump to sh if something fails
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error() {
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echo "Jumping into the shell..."
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setsid cttyhack sh
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}
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# Populate /bin with binaries from busybox
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/bin/busybox --install /bin
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mkdir -p /proc
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mount -t proc proc /proc
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mkdir -p /sys
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mount -t sysfs sysfs /sys
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mkdir -p /sys/dev
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mkdir -p /var/run
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mkdir -p /dev
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mkdir -p /dev/pts
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mount -t devpts devpts /dev/pts
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# Populate /dev
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echo /bin/mdev > /proc/sys/kernel/hotplug
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mdev -s
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mkdir -p /newroot
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mount -t tmpfs -o size=${SIZE}m tmpfs /newroot || error
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echo "Extracting rootfs... "
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xz -d -c -f rootfs.tar.xz | tar -x -f - -C /newroot || error
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mount --move /sys /newroot/sys
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mount --move /proc /newroot/proc
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mount --move /dev /newroot/dev
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exec switch_root /newroot /sbin/init || error
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EOF
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chmod +x $TMP_DIR/initramfs/init
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tar -cJf $TMP_DIR/initramfs/rootfs.tar.xz -C $TMP_DIR/newroot .
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cp $TMP_DIR/newroot/boot/vmlinuz-* $RESULT_DIR/vmlinuz
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cd $TMP_DIR/initramfs
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find . -print0 | cpio --null -ov --format=newc | gzip -9 > $RESULT_DIR/initramfs.gz
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ls -la $RESULT_DIR/
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exit 0
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