Files
reterminal-dm4/emmc-provisioning/network-boot-initramfs/build.sh
nearxos 7e1bf8a4c2 Add DHCP network boot management to API and UI
Enhance the dashboard API with new endpoints for managing DHCP network boot options, allowing devices to enable or disable network boot via POST requests. Update the device action handling to include a 'reboot' action, specifically for network devices. Modify the home.html template to display the current state of network boot and provide a button for disabling it. Update provisioning scripts to disable network boot after deployment or backup completion, ensuring devices boot from eMMC on the next startup. Improve user feedback and error handling throughout the changes.
2026-02-20 17:05:38 +02:00

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#!/usr/bin/env bash
# Build provisioning initramfs for Raspberry Pi 4 / CM4 (aarch64).
# Produces initrd.img (gzip cpio) for TFTP boot (config.txt: initramfs initrd.img followkernel).
#
# On x86_64: tries Docker/Podman with --platform linux/arm64; if that fails (no
# arm64 emulation), downloads prebuilt static aarch64 busybox and curl. No sudo needed.
# On aarch64 (e.g. Raspberry Pi): uses local busybox and curl if installed.
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT="${1:-$SCRIPT_DIR/initrd.img}"
BUILD_DIR=$(mktemp -d)
trap "rm -rf $BUILD_DIR" EXIT
echo "Build dir: $BUILD_DIR"
# Layout: /init, /provisioning-client.sh, /bin/busybox, /bin/sh, /usr/bin/curl, /lib/*.so
mkdir -p "$BUILD_DIR"/{bin,usr/bin,proc,sys,dev,dev/pts,lib}
cp "$SCRIPT_DIR/init" "$BUILD_DIR/init"
cp "$SCRIPT_DIR/provisioning-client.sh" "$BUILD_DIR/provisioning-client.sh"
chmod +x "$BUILD_DIR/init" "$BUILD_DIR/provisioning-client.sh"
ARCH=$(uname -m 2>/dev/null)
if [ "$ARCH" = "aarch64" ] || [ "$ARCH" = "arm64" ] || [ "$ARCH" = "armv8l" ]; then
if ! command -v busybox >/dev/null 2>&1 || ! command -v curl >/dev/null 2>&1; then
echo "On aarch64: install busybox and curl (apt install busybox curl) then re-run."
exit 1
fi
echo "Copying busybox and curl from host (aarch64)..."
cp "$(command -v busybox)" "$BUILD_DIR/bin/busybox"
cp "$(command -v curl)" "$BUILD_DIR/usr/bin/curl"
chmod +x "$BUILD_DIR/bin/busybox" "$BUILD_DIR/usr/bin/curl"
for f in $(ldd "$(command -v curl)" 2>/dev/null | awk '/=>/{print $3}'); do
[ -f "$f" ] && cp "$f" "$BUILD_DIR/lib/"
done
cp /lib/ld-linux-aarch64.so.1 "$BUILD_DIR/lib/" 2>/dev/null || true
else
# x86_64: try container first; on "Exec format error" (no arm64 emulation) use static downloads
CONTAINER_RUNTIME=""
for cmd in docker podman; do
if command -v "$cmd" >/dev/null 2>&1; then
CONTAINER_RUNTIME="$cmd"
break
fi
done
CONTAINER_OK=0
if [ -n "$CONTAINER_RUNTIME" ]; then
echo "Trying $CONTAINER_RUNTIME (linux/arm64)..."
CNT_NAME="cm4-initramfs-build-$$"
# Use a container-internal dir (no bind mount); copy out with podman cp (works with rootless)
$CONTAINER_RUNTIME run --name "$CNT_NAME" --platform linux/arm64 debian:bookworm-slim bash -c '
apt-get update -qq && apt-get install -y -qq busybox curl
mkdir -p /out/bin /out/usr/bin /out/lib
cp /bin/busybox /out/bin/busybox
cp /usr/bin/curl /out/usr/bin/curl
chmod +x /out/bin/busybox /out/usr/bin/curl
ldd /usr/bin/curl 2>/dev/null | awk "/=>/{print \$3}" | while read f; do [ -n "$f" ] && [ -f "$f" ] && cp "$f" /out/lib/; done
cp /lib/ld-linux-aarch64.so.1 /out/lib/ 2>/dev/null || true
' 2>/dev/null || true
# Always copy from container (avoids rootless bind-mount issues)
$CONTAINER_RUNTIME cp "$CNT_NAME:/out/bin/busybox" "$BUILD_DIR/bin/" 2>/dev/null && \
$CONTAINER_RUNTIME cp "$CNT_NAME:/out/usr/bin/curl" "$BUILD_DIR/usr/bin/" 2>/dev/null && \
$CONTAINER_RUNTIME cp "$CNT_NAME:/out/lib/." "$BUILD_DIR/lib/" 2>/dev/null || true
$CONTAINER_RUNTIME rm -f "$CNT_NAME" >/dev/null 2>&1
if [ -f "$BUILD_DIR/bin/busybox" ] && [ -f "$BUILD_DIR/usr/bin/curl" ]; then
CONTAINER_OK=1
echo "Container build succeeded."
fi
fi
if [ "$CONTAINER_OK" -ne 1 ]; then
echo "Using prebuilt static aarch64 binaries (no container/emulation needed)..."
DOWNLOAD_DIR=$(mktemp -d)
trap "rm -rf $BUILD_DIR $DOWNLOAD_DIR" EXIT
if command -v curl >/dev/null 2>&1; then
GET="curl -sL"
GET_O="curl -sL -o"
else
GET="wget -q -O -"
GET_O="wget -q -O"
fi
# Static busybox aarch64: try busybox.net, then Alpine busybox-static package
BB_OK=0
$GET_O "$DOWNLOAD_DIR/busybox" "https://busybox.net/downloads/binaries/1.35.0-defconfig-multiarch-musl/busybox-armv8l" 2>/dev/null || true
if [ -f "$DOWNLOAD_DIR/busybox" ] && [ -s "$DOWNLOAD_DIR/busybox" ]; then
BB_OK=1
fi
if [ "$BB_OK" -ne 1 ]; then
echo "Trying Alpine busybox-static aarch64..."
$GET_O "$DOWNLOAD_DIR/bb.apk" "https://dl-cdn.alpinelinux.org/alpine/v3.19/main/aarch64/busybox-static-1.36.1-r11.apk" 2>/dev/null || true
if [ -f "$DOWNLOAD_DIR/bb.apk" ] && [ -s "$DOWNLOAD_DIR/bb.apk" ]; then
case "$(head -c 4 "$DOWNLOAD_DIR/bb.apk" | od -An -tx1 2>/dev/null | tr -d ' ')" in
3c21444f|3c68746d) ;; # HTML response, skip extract
*)
(cd "$DOWNLOAD_DIR" && (tar xf bb.apk 2>/dev/null || tar xzf bb.apk 2>/dev/null) && [ -f data.tar.gz ] && tar xzf data.tar.gz 2>/dev/null)
;;
esac
fi
if [ -f "$DOWNLOAD_DIR/bin/busybox" ] && [ -s "$DOWNLOAD_DIR/bin/busybox" ]; then
cp "$DOWNLOAD_DIR/bin/busybox" "$DOWNLOAD_DIR/busybox"
BB_OK=1
fi
fi
if [ "$BB_OK" -ne 1 ]; then
echo "Failed to download busybox (x86 host cannot run arm64 container without emulation)."
echo ""
echo "Option A - Enable arm64 containers (one-time, needs sudo):"
echo " Fedora: sudo dnf install -y qemu-user-static"
echo " Then re-run this script (Podman will use QEMU to run the arm64 build)."
echo ""
echo "Option B - Build on a Raspberry Pi 4 (aarch64):"
echo " scp -r $(dirname "$SCRIPT_DIR") pi@<pi-ip>:~/ && ssh pi@<pi-ip> 'cd ~/emmc-provisioning/network-boot-initramfs && sudo apt install -y busybox curl && ./build.sh'"
echo " Then scp pi@<pi-ip>:~/emmc-provisioning/network-boot-initramfs/initrd.img ."
exit 1
fi
chmod +x "$DOWNLOAD_DIR/busybox"
cp "$DOWNLOAD_DIR/busybox" "$BUILD_DIR/bin/busybox"
# Static curl aarch64 glibc (Raspberry Pi OS uses glibc)
$GET "https://github.com/stunnel/static-curl/releases/download/8.18.0/curl-linux-aarch64-glibc-8.18.0.tar.xz" -o "$DOWNLOAD_DIR/curl.tar.xz" || true
if [ ! -f "$DOWNLOAD_DIR/curl.tar.xz" ] || [ ! -s "$DOWNLOAD_DIR/curl.tar.xz" ]; then
echo "Failed to download static curl."
exit 1
fi
(cd "$DOWNLOAD_DIR" && tar xf curl.tar.xz)
CURL_BIN=$(find "$DOWNLOAD_DIR" -maxdepth 3 -name "curl" -type f 2>/dev/null | head -1)
if [ -n "$CURL_BIN" ] && [ -x "$CURL_BIN" ]; then
cp "$CURL_BIN" "$BUILD_DIR/usr/bin/curl"
chmod +x "$BUILD_DIR/usr/bin/curl"
else
echo "Could not find curl binary in tarball."
exit 1
fi
rm -rf "$DOWNLOAD_DIR"
trap "rm -rf $BUILD_DIR" EXIT
fi
fi
# Verify we have busybox (container or fallback must have left it)
if [ ! -f "$BUILD_DIR/bin/busybox" ] || [ ! -s "$BUILD_DIR/bin/busybox" ]; then
echo "Error: busybox not found in $BUILD_DIR/bin. If the container ran, check Podman volume mount."
exit 1
fi
chmod +x "$BUILD_DIR/bin/busybox" 2>/dev/null || true
# Busybox applets we need (sh, mount, udhcpc, etc.)
cd "$BUILD_DIR/bin"
./busybox --list 2>/dev/null | while read applet; do
case "$applet" in
sh|ash|mount|umount|mkdir|cat|ip|udhcpc|sleep|echo|grep|cut|awk|hostname|dd|reboot) ln -sf busybox "$applet"; ;;
esac
done
[ -e sh ] || ln -sf busybox sh
# Build cpio (gzip)
echo "Building cpio..."
( cd "$BUILD_DIR"; find . -print0 | cpio -o -H newc -0 2>/dev/null ) | gzip -9 > "$OUTPUT"
echo "Written: $OUTPUT ($(stat -c%s "$OUTPUT" 2>/dev/null || stat -f%z "$OUTPUT" 2>/dev/null) bytes)"
echo ""
echo "Next: copy initrd.img to TFTP root (e.g. /srv/tftpboot on LXC) and in config.txt add:"
echo " initramfs initrd.img followkernel"
echo "Then ensure the kernel line loads the initrd (followkernel does that)."
echo "Default provisioning server: http://10.20.50.1:5000 (override with kernel cmdline: provisioning_server=http://...)"