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Diffstat (limited to 'tools/yardstick-img-dpdk-modify')
| -rw-r--r-- | tools/yardstick-img-dpdk-modify | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/tools/yardstick-img-dpdk-modify b/tools/yardstick-img-dpdk-modify new file mode 100644 index 000000000..ec2672d27 --- /dev/null +++ b/tools/yardstick-img-dpdk-modify @@ -0,0 +1,162 @@ +#!/bin/bash + +############################################################################## +# Copyright (c) 2015 Ericsson AB and others. +# +# All rights reserved. This program and the accompanying materials +# are made available under the terms of the Apache License, Version 2.0 +# which accompanies this distribution, and is available at +# http://www.apache.org/licenses/LICENSE-2.0 +############################################################################## + +# yardstick-img-dpdk-modify - download and modify a Ubuntu cloud image +# +# The actual customization is done by a script passed with an absolute path as +# the only single argument. The command needs to be invoked as sudo +# +# Example invocation: +# yardstick-img-dpdk-modify /home/yardstick/tools/ubuntu-server-cloudimg-dpdk-modify.sh +# +# Warning: the script will create files by default in: +# /tmp/workspace/yardstick +# the files will be owned by root! +# +# TODO: image resize is needed if the base image is too small +# + +set -e +set -x + +die() { + echo "error: $1" >&2 + exit 1 +} + +test $# -eq 1 || die "no image specific script as argument" +test $(id -u) -eq 0 || die "should invoke using sudo" + +cmd=$1 +test -x $cmd +mountdir="/mnt/yardstick" + +workspace=${WORKSPACE:-"/tmp/workspace/yardstick"} +host=${HOST:-"cloud-images.ubuntu.com"} +release=${RELEASE:-"wily"} +image_path="${release}/current/${release}-server-cloudimg-amd64-disk1.img" +image_url=${IMAGE_URL:-"https://${host}/${image_path}"} +md5sums_path="${release}/current/MD5SUMS" +md5sums_url=${MD5SUMS_URL:-"https://${host}/${md5sums_path}"} + +imgfile="${workspace}/yardstick-${release}-server" +raw_imgfile="${workspace}/yardstick-${release}-server.raw" +filename=$(basename $image_url) + +# download and checksum base image, conditionally if local copy is outdated +download() { + test -d $workspace || mkdir -p $workspace + cd $workspace + rm -f MD5SUMS # always download the checksum file to a detect stale image + wget $md5sums_url + test -e $filename || wget -nc $image_url + grep $filename MD5SUMS | md5sum -c || + if [ $? -ne 0 ]; then + rm $filename + wget -nc $image_url + grep $filename MD5SUMS | md5sum -c + fi + qemu-img convert $filename $raw_imgfile + cd - +} + +# mount image +setup() { + mkdir -p $mountdir + + for i in $(seq 0 9); do + [ -a /dev/loop$i ] || mknod -m 660 /dev/loop$i b 7 $i + done + + loopdevice=$(kpartx -l $raw_imgfile | head -1 | cut -f1 -d ' ') + + kpartx -a $raw_imgfile + + mount /dev/mapper/$loopdevice $mountdir + mount -t proc none $mountdir/proc + + echo $loopdevice + + sudo resize2fs /dev/mapper/$loopdevice + + cp $cmd $mountdir/$(basename $cmd) +} + +# modify image running a script using in a chrooted environment +modify() { + # resolv.conf does not exist in base image, pass nameserver value from host + nameserver_ip=$(grep -m 1 '^nameserver' \ + /etc/resolv.conf | awk '{ print $2 '}) + + # prevent init scripts from running during install + echo $'#!/bin/sh\nexit 101' >$mountdir/usr/sbin/policy-rc.d + chmod a+x $mountdir/usr/sbin/policy-rc.d + + chroot $mountdir /$(basename $cmd) $nameserver_ip + + rm -rf $mountdir/usr/sbin/policy-rc.d + + umount -f $mountdir/proc + umount $mountdir + + qemu-img convert -c -o compat=0.10 -O qcow2 $raw_imgfile $imgfile +# qemu-img convert -O vmdk $raw_imgfile $imgfile + + if dmsetup table | grep $loopdevice; then + dmsetup clear $loopdevice || true + fi +} + +# cleanup (umount) the image +cleanup() { + # designed to be idempotent + mount | grep $mountdir/proc && umount $mountdir/proc + mount | grep $mountdir && umount $mountdir + if [ -f $raw_imgfile ]; then + kpartx -dv $raw_imgfile || true + fi + rm -f $raw_imgfile + rm -rf $mountdir +} + +exitcode="" +error_trap() +{ + local rc=$? + + set +e + + if [ -z "$exitcode" ]; then + exitcode=$rc + fi + + cleanup + + echo "Image build failed with $exitcode" + + exit $exitcode +} + +main() { + cleanup + + trap "error_trap" EXIT SIGTERM + + download + setup + modify + trap - EXIT SIGTERM + cleanup + + echo "the modified image is found here: $imgfile" +} + +main |