master: Install kernel and create an initramdisk

The initramdisk is very minimal and will only come with some basic
kernel modules as well as scripts to mount the squashfs and jump into
it.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/bricklayer-master b/src/bricklayer-master
index 9f4908f2a5bc92330504fb09947e566363bcf985..b2918c87cd4e2150c092ac22530bcec7dcb3207c 100644 (file)
--- a/src/bricklayer-master
+++ b/src/bricklayer-master
@@ -25,6 +25,7 @@ PAKFIRE_CONFIG="/etc/pakfire/distros/ipfire3.conf"
 # Packages to install in the live system
 PACKAGES=(
        "@Base"
+       "dracut"
        "kernel"
 )
 
@@ -32,6 +33,7 @@ BUILDSYSTEM_PACKAGES=(
        "@Base"
        "dracut"
        "grub"
+       "dmsetup"
 )
 
 # Compress as best as we can
@@ -201,6 +203,60 @@ make_grub_efi_image() {
        return 0
 }
 
+find_kernel_release() {
+       local file
+       for file in ${buildsystem}/usr/lib/modules/*; do
+               if [ -d "${file}" ]; then
+                       basename "${file}"
+                       return 0
+               fi
+       done
+
+       return 1
+}
+
+install_kernel_image() {
+       local filename="${1}"
+
+       # Find kernel release
+       local kernel_release="$(find_kernel_release)"
+
+       cp "${buildsystem}/boot/vmlinuz-${kernel_release}" "${filename}"
+}
+
+install_initramfs() {
+       local filename="${1}"
+
+       # Find kernel release
+       local kernel_release="$(find_kernel_release)"
+
+       local args=(
+               --verbose
+
+               # Generate a ramdisk that can run on many hosts
+               --no-hostonly
+
+               --kmoddir "/usr/lib/modules/${kernel_release}"
+
+               # Add the live image module to mount our squashfs system
+               --add "dmsquash-live"
+
+               # Only enable these modules
+               --modules "base kernel-modules"
+
+               # Add support for squashfs
+               --filesystems "squashfs"
+       )
+
+       if ! in_buildsystem --bind="${tempdir}" \
+                       dracut "${args[@]}" "${filename}" "${kernel_release}" &>/tmp/dracut.$$; then
+               unlink "${filename}"
+               return 1
+       fi
+
+       return 0
+}
+
 mkimage() {
        local filename="${1}"
        local r=0
@@ -293,6 +349,18 @@ mkimage() {
                )
        fi
 
+       # Install the kernel image
+       if ! install_kernel_image "${tempdir}/boot/vmlinuz"; then
+               rm rf "${tempdir}"
+               return 1
+       fi
+
+       # Create live ramdisk
+       if ! install_initramfs "${tempdir}/boot/initramfs.img"; then
+               rm -rf "${tempdir}"
+               return 1
+       fi
+
        # Create the live system image
        if ! make_live_system_image "${tempdir}/live-os.img"; then
                rm -rf "${tempdir}"