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openwrt-docker/src/entry.sh
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#!/usr/bin/env bash
# Based on https://github.com/qemus/qemu-docker
set -Eeuo pipefail
APP="OpenWrt"
SUPPORT="https://github.com/AlbrechtL/openwrt-docker-arm64-build"
attach_eth_if () {
HOST_IF=$1
CONTAINER_IF=$2
QEMU_IF=$3
# Privilige=true and pid=host mode necessary
# Sources
# * https://serverfault.com/questions/688483/assign-physical-interface-to-docker-exclusively
# * https://medium.com/lucjuggery/a-container-to-access-the-shell-of-the-host-2c7c227c64e9
# * https://developers.redhat.com/blog/2018/10/22/introduction-to-linux-interfaces-for-virtual-networking#
info "Attaching physical Ethernet interface $HOST_IF into container with the name $CONTAINER_IF ..."
PID_CONTAINTER=$(nsenter --target 1 --uts --net --ipc --mount docker inspect -f '{{.State.Pid}}' $(cat /etc/hostname))
nsenter --target 1 --uts --net --ipc --mount mkdir -p /var/run/netns
nsenter --target 1 --uts --net --ipc --mount ln -s /proc/$PID_CONTAINTER/ns/net /var/run/netns/$PID_CONTAINTER
nsenter --target 1 --uts --net --ipc --mount ip link set $HOST_IF netns $PID_CONTAINTER name $CONTAINER_IF
nsenter --target 1 --uts --net --ipc --mount ip netns exec $PID_CONTAINTER ip link set $CONTAINER_IF up
nsenter --target 1 --uts --net --ipc --mount rm /var/run/netns/$PID_CONTAINTER
#ip link add link $CONTAINER_IF name $QEMU_IF type ipvlan mode l2
#ip link add link $CONTAINER_IF name $QEMU_IF type macvtap mode bridge
ip link add link $CONTAINER_IF name $QEMU_IF type macvtap mode passthru
# Create MAC address for new interface
QEMU_MAC_OUI="52:54:00"
read MAC </sys/class/net/$CONTAINER_IF/address
QEMU_IF_MAC=${QEMU_MAC_OUI}${MAC:8} # Replaces the 8 first characters of the original MAC
# Active new interface
ip link set $QEMU_IF address $QEMU_IF_MAC up
#ip link set $QEMU_IF up
}
cd /run
# Initialize system
. reset.sh
trap - ERR
# Check if rootfs is in volume
FILE=/storage/rootfs-${OPENWRT_VERSION}.img
if [ -f "$FILE" ]; then
info "$FILE exists. Nothing to do."
else
info "$FILE does not exist. Copying rootfs-${OPENWRT_VERSION}.img to storage ..."
cp /var/vm/rootfs-${OPENWRT_VERSION}.img.gz /storage/rootfs-${OPENWRT_VERSION}.img.gz
gzip -d /storage/rootfs-${OPENWRT_VERSION}.img.gz
info "Inject some additional files into the image"
mount /storage/rootfs-${OPENWRT_VERSION}.img /mnt
# mount -o offset=$((512*262656)) /storage/disk.img /mnt # combined image ext4 partition starts at offset 262656
chmod +x /var/vm/openwrt_additional/bin/*
cp /var/vm/openwrt_additional/bin/* /mnt/usr/bin/
umount /mnt
if [ -f "/storage/current_version" ]; then
mv /storage/current_version /storage/old_version
fi
touch /storage/current_version
echo "rootfs-${OPENWRT_VERSION}.img" > /storage/current_version
fi
# Enable VNC
info "Activating web VNC ..."
[ ! -f "$INFO" ] && error "File $INFO not found?!"
rm -f "$INFO"
[ ! -f "$PAGE" ] && error "File $PAGE not found?!"
rm -f "$PAGE"
# Check KVM
info "Checking for KVM ..."
KVM_ERR=""
CPU_ARGS="-cpu cortex-a53"
if [ ! -e /dev/kvm ]; then
KVM_ERR="(device file missing)"
else
if ! sh -c 'echo -n > /dev/kvm' &> /dev/null; then
KVM_ERR="(no write access)"
else
CPU_ARGS="--enable-kvm -cpu host"
info "KVM detected"
fi
fi
if [ -n "$KVM_ERR" ]; then
info "KVM acceleration not detected $KVM_ERR, this will cause a major loss of performance."
fi
# Attach physical PHY to container
LAN_ARGS=""
if [[ -z "${LAN_IF}" ]]; then
LAN_ARGS="-device virtio-net,netdev=qlan0 -netdev user,id=qlan0,net=192.168.1.0/24"
else
HOST_LAN_IF=$LAN_IF
attach_eth_if $HOST_LAN_IF $HOST_LAN_IF qlan0
exec 30<>/dev/tap$(cat /sys/class/net/qlan0/ifindex)
LAN_ARGS="-device virtio-net-pci,netdev=hostnet0,mac=$(cat /sys/class/net/qlan0/address) \
-netdev tap,fd=30,id=hostnet0"
fi
WAN_ARGS=""
if [[ -z "${WAN_IF}" ]]; then
WAN_ARGS="-device virtio-net,netdev=qwan0 -netdev user,id=qwan0,hostfwd=tcp::8000-:80,hostfwd=tcp::8022-:22"
else
HOST_WAN_IF=$WAN_IF
attach_eth_if $HOST_WAN_IF $HOST_WAN_IF qwan0
exec 31<>/dev/tap$(cat /sys/class/net/qwan0/ifindex)
WAN_ARGS="-device virtio-net-pci,netdev=hostnet1,mac=$(cat /sys/class/net/qwan0/address) \
-netdev tap,fd=31,id=hostnet1"
fi
# Attach USB interface
USB_ARGS=""
if [[ -z "${USB_VID_1}" || -z "${USB_PID_1}" ]]; then
USB_ARGS=""
else
USB_ARGS="-device usb-host,vendorid=0x$USB_VID_1,productid=0x$USB_PID_1"
fi
# Migrate settings from old OpenWrt version to new one
if [ -f /storage/old_version ]; then
OLD_VERSION_ROOTFS=`cat /storage/old_version`
info "Migrate settings from $OLD_VERSION_ROOTFS to rootfs-${OPENWRT_VERSION}.img. This can take some time because we need to boot openwrt multiple times."
mount /storage/$OLD_VERSION_ROOTFS /mnt
mv /mnt/etc/rc.local /mnt/etc/rc.local.disabled
cp /var/vm/openwrt_additional/do_backup_rc.local /mnt/etc/rc.local
chmod +x /mnt/etc/rc.local
umount /mnt
info "Boot previous $OLD_VERSION_ROOTFS to get config"
qemu-system-aarch64 -M virt \
-m 128 \
-nodefaults \
$CPU_ARGS -smp $CPU_COUNT \
-bios /usr/share/qemu/edk2-aarch64-code.fd \
-display vnc=:0,websocket=5700 \
-vga none -device ramfb \
-kernel /var/vm/kernel.bin -append "root=fe00 console=tty0" \
-blockdev driver=raw,node-name=hd0,cache.direct=on,file.driver=file,file.filename=/storage/${OLD_VERSION_ROOTFS} \
-device virtio-blk-pci,drive=hd0 \
-device qemu-xhci -device usb-kbd
# Get config backup from old rootfs
mount /storage/$OLD_VERSION_ROOTFS /mnt
rm /mnt/etc/rc.local
mv /mnt/etc/rc.local.disabled /mnt/etc/rc.local
if [ -f /mnt/root/backup/config.tar.gz ]; then
cp /mnt/root/backup/config.tar.gz /storage/config-`basename $OLD_VERSION_ROOTFS .img`.tar.gz
else
error "No config.tar.gz in $OLD_VERSION_ROOTFS found"
fi
umount /mnt
# Put config backup to new rootfs
mount $FILE /mnt
mkdir -p /mnt/root/backup
cp /storage/config-`basename $OLD_VERSION_ROOTFS .img`.tar.gz /mnt/root/backup/config.tar.gz
mv /mnt/etc/rc.local /mnt/etc/rc.local.disabled
cp /var/vm/openwrt_additional/restore_backup_rc.local /mnt/etc/rc.local
chmod +x /mnt/etc/rc.local
umount /mnt
info "Boot current rootfs-${OPENWRT_VERSION}.img to install config"
qemu-system-aarch64 -M virt \
-m 128 \
-nodefaults \
$CPU_ARGS -smp $CPU_COUNT \
-bios /usr/share/qemu/edk2-aarch64-code.fd \
-display vnc=:0,websocket=5700 \
-vga none -device ramfb \
-kernel /var/vm/kernel.bin -append "root=fe00 console=tty0" \
-blockdev driver=raw,node-name=hd0,cache.direct=on,file.driver=file,file.filename=${FILE} \
-device virtio-blk-pci,drive=hd0 \
-device qemu-xhci -device usb-kbd
mount $FILE /mnt
rm /mnt/etc/rc.local
mv /mnt/etc/rc.local.disabled /mnt/etc/rc.local
mv /mnt/root/backup/config.tar.gz /mnt/root/backup/config-`basename $OLD_VERSION_ROOTFS .img`.tar.gz
umount /mnt
# Finally remove old rootfs and old files
rm /storage/$OLD_VERSION_ROOTFS
rm /storage/old_version
rm /storage/config-`basename $OLD_VERSION_ROOTFS .img`.tar.gz
fi
# See qemu command if debug is enabled
[[ "$DEBUG" == [Yy1]* ]] && set -x
#************************ FINAL BOOTING ************************
info "Booting image using $VERS..."
exec qemu-system-aarch64 -M virt \
-m 128 \
-nodefaults \
$CPU_ARGS -smp $CPU_COUNT \
-bios /usr/share/qemu/edk2-aarch64-code.fd \
-display vnc=:0,websocket=5700 \
-vga none -device ramfb \
-kernel /var/vm/kernel.bin -append "root=fe00 console=tty0" \
-blockdev driver=raw,node-name=hd0,cache.direct=on,file.driver=file,file.filename=${FILE} \
-device virtio-blk-pci,drive=hd0 \
-device qemu-xhci -device usb-kbd \
$LAN_ARGS \
$WAN_ARGS \
$USB_ARGS \
-qmp unix:/run/qmp-sock,server=on,wait=off
# -device virtio-net,netdev=qlan1 -netdev user,id=qlan1,net=192.168.1.0/24,hostfwd=tcp::8000-192.168.1.1:80 \
# -blockdev driver=raw,node-name=hd0,cache.direct=on,file.driver=file,file.filename=/var/vm/openwrt-armsr-armv8-generic-ext4-combined.img \
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