#!/bin/bash set -eux set -o pipefail _LIB="/tmp/ramdisk-build" source "$_LIB/common-defaults" source "$_LIB/img-defaults" source "$_LIB/ramdisk-defaults" source "$_LIB/common-functions" source "$_LIB/img-functions" source "$_LIB/ramdisk-functions" KERNEL_VERSION="${DIB_KERNEL_VERSION:-$(find_kernel_version)}" MODULE_DIR="$MODULE_ROOT/lib/modules/$KERNEL_VERSION" FIRMWARE_DIR="$MODULE_ROOT/lib/firmware" LIB_UDEV="$LIB_UDEV_ROOT/lib/udev" INIT="$_LIB/scripts/init" FUNCTIONS_D="$_LIB/scripts/d" MODULE="$_LIB/scripts/module" # NOTE(bnemec): IMAGE_ELEMENT is normally set in disk-image-create, but we're # not using that to build the image here. IMAGE_ELEMENT= mk_build_dir mkdir -p "$TMP_BUILD_DIR/mnt" export TMP_HOOKS_PATH=/tmp export TMP_MOUNT_PATH="$TMP_BUILD_DIR/mnt" echo "building ramdisk in $TMP_MOUNT_PATH" populate_init SCRIPT_HOME=/tmp/in_target.d/bin TMP_HOOKS_PATH=/tmp/in_target.d run_d ramdisk-install MODULE_PATH="/usr/lib/dracut/modules.d" cp -r "$MODULE" "$MODULE_PATH/80deploy-ramdisk" cp "$TMP_MOUNT_PATH/init" "$MODULE_PATH/80deploy-ramdisk/init.sh" # Notes on the options passed to Dracut: # -N: Do not build a host-specific ramdisk. We want to be able to run this ramdisk # on as many different machines as possible. # --install: A list of the binaries needed by our ramdisk script fragments. # --kernel-cmdline: Kernel parameters to pass to the ramdisk. rd.neednet is required # to force Dracut to bring up networking even if it isn't passed a # network target root. Pre-loading the ahci module is necessary # on some systems to ensure that SATA disks are recognized. # --include: Files from the chroot to include in the ramdisk. # --kver: The kernel version to use, as determined above. # --add-drivers: Extra kernel modules to include in the ramdisk. # -o: Force omission of these dracut modules. Our scripts are written for bash, # so dash is not desirable, and plymouth was causing some issues on Ubuntu. dracut -N \ --install 'tail head awk ifconfig cut expr route ping tgtd tgtadm nc wget curl tftp grep' \ --kernel-cmdline "rd.shell rd.debug rd.neednet=1 rd.driver.pre=ahci" \ --include "$TMP_MOUNT_PATH/init-func" /init-func \ --kver "${KERNEL_VERSION}" \ --add-drivers "virtio virtio_net virtio_blk" \ -o "dash plymouth" \ /tmp/ramdisk cp "/boot/vmlinuz-${KERNEL_VERSION}" /tmp/kernel chmod o+r /tmp/kernel