diskimage-builder/elements/baremetal/cleanup.d/99-extract-kernel-and-ramdisk
Jan Grant 6df7039ba1 Parameterise PXE kernel and initrd selection
When using custom-built kernels, their filenames may not necessarily
follow the standard naming conventions for the stock systems in question.

This patch permits the specification of an alternative pattern to use
when looking for the correct kernel to construct the PXE images from.

Example:
  export DIB_BAREMETAL_KERNEL_PATTERN="kernel*jang"
  export DIB_BAREMETAL_INITRD_PATTERN="initrd*jang"

Change-Id: I86e5254051addd5e89dd4e363e9bba117e65353d
2014-05-21 10:08:23 +01:00

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#!/bin/bash
#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
set -eu
set -o pipefail
[ -n "$TARGET_ROOT" ]
# Dig up the initrd and kernel to use.
BOOTDIR="$TARGET_ROOT/boot"
KERNEL=
RAMDISK=
if [ -n "${DIB_BAREMETAL_KERNEL_PATTERN:-}" -a -n "${DIB_BAREMETAL_INITRD_PATTERN:-}" ]; then
KERNEL=$(basename `eval ls -1rv "$BOOTDIR/${DIB_BAREMETAL_KERNEL_PATTERN}" | head -1`)
RAMDISK=$(basename `eval ls -1rv "$BOOTDIR/${DIB_BAREMETAL_INITRD_PATTERN}" | head -1`)
elif [ -f $TARGET_ROOT/etc/redhat-release ]; then
# Prioritize PAE if present
KERNEL=$(ls -1rv $BOOTDIR/vmlinuz* | grep PAE | grep -v debug | head -1 || echo "")
if [ ! $KERNEL ]; then
KERNEL=$(ls -1rv $BOOTDIR/vmlinuz* | grep -v debug | head -1 || echo "")
if [ ! $KERNEL ]; then
echo "No suitable kernel found."
exit 1
fi
fi
KERNEL=$(basename $KERNEL)
KERNEL_VERSION=`echo $KERNEL | sed 's/vmlinuz-//g'`
RAMDISK=$(basename `ls $BOOTDIR/initramfs-$KERNEL_VERSION.img` || echo "")
if [ ! $RAMDISK ]; then
echo "Can't find an initramfs for the $KERNEL_VERSION version of the kernel."
exit 1
fi
elif [ -f $TARGET_ROOT/etc/debian_version ]; then
KERNEL=$(basename `ls -1rv $BOOTDIR/vmlinuz*generic | head -1`)
RAMDISK=$(basename `ls -1rv $BOOTDIR/initrd*generic | head -1`)
elif [ -f $TARGET_ROOT/etc/SuSE-release ]; then
KERNEL=$(basename `ls -1rv $BOOTDIR/vmlinuz`)
RAMDISK=$(basename `ls -1rv $BOOTDIR/initrd`)
else
echo "ERROR: Unable to detect operating system"
exit 1
fi
sudo cp $BOOTDIR/$KERNEL ${IMAGE_NAME}.vmlinuz
sudo cp $BOOTDIR/$RAMDISK ${IMAGE_NAME}.initrd
sudo chmod a+r ${IMAGE_NAME}.vmlinuz
sudo chmod a+r ${IMAGE_NAME}.initrd