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Fix initramfs hook integration - copy custom configs before chroot and build with proper mounts

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Torbjørn Lindahl
2026-01-30 23:48:30 +01:00
parent 902f00e2b9
commit adc92a61b4
1 changed files with 21 additions and 13 deletions
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34
build-image.sh
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@@ -25,6 +25,15 @@ fi
rm -rf $BUILD_DIR/rootfs
mkdir -p $BUILD_DIR/rootfs
# Copy custom initramfs config into rootfs BEFORE debootstrap, so it's available during chroot
echo "Setting up custom initramfs configuration..."
INITRAMFS_CONFIG="$SCRIPT_DIR/initramfs"
if [ ! -d "$INITRAMFS_CONFIG" ]; then
echo "ERROR: Custom initramfs config not found at $INITRAMFS_CONFIG"
exit 1
fi
# These dirs will be created by debootstrap, so we'll copy after that
# Create base Ubuntu system
echo "Running debootstrap (this will take several minutes)..."
debootstrap --arch=amd64 --variant=minbase --components=main,universe,multiverse \
@@ -202,21 +211,20 @@ umount -l $BUILD_DIR/rootfs/proc
rm $BUILD_DIR/rootfs/setup.sh
# Build initramfs with custom netboot hooks/scripts
# Copy custom initramfs config into rootfs while /proc is mounted
echo "Installing custom initramfs hooks and scripts..."
INITRAMFS_CONFIG="$SCRIPT_DIR/initramfs"
cp "$INITRAMFS_CONFIG/initramfs.conf" "$BUILD_DIR/rootfs/etc/initramfs-tools/"
cp "$INITRAMFS_CONFIG/modules" "$BUILD_DIR/rootfs/etc/initramfs-tools/"
cp -r "$INITRAMFS_CONFIG/hooks/"* "$BUILD_DIR/rootfs/usr/share/initramfs-tools/hooks/"
cp -r "$INITRAMFS_CONFIG/scripts/"* "$BUILD_DIR/rootfs/usr/share/initramfs-tools/scripts/"
# Build initramfs while /proc/sys/dev are still mounted
echo "Building custom netboot initramfs..."
KERNEL_VERSION=$(ls -1 $BUILD_DIR/rootfs/boot/vmlinuz-* | sed 's|.*/vmlinuz-||' | head -1)
# Use mkinitramfs with custom initramfs directory
INITRAMFS_CONFIG="$SCRIPT_DIR/initramfs"
if [ -d "$INITRAMFS_CONFIG" ]; then
mkinitramfs -d "$INITRAMFS_CONFIG" \
-k "$KERNEL_VERSION" \
-o $BUILD_DIR/rootfs/boot/initrd-netboot.img
echo "Initramfs build complete. Size: $(du -h $BUILD_DIR/rootfs/boot/initrd-netboot.img | cut -f1)"
else
echo "ERROR: Custom initramfs config not found at $INITRAMFS_CONFIG"
exit 1
fi
chroot $BUILD_DIR/rootfs mkinitramfs -v -o /boot/initrd-netboot.img $KERNEL_VERSION
INITRAMFS_OUTPUT="$BUILD_DIR/rootfs/boot/initrd-netboot.img"
echo "Initramfs build complete. Size: $(du -h $INITRAMFS_OUTPUT | cut -f1)"
# Copy kernel and netboot initramfs
mkdir -p $IMAGE_DIR/$VERSION