download and modify centos image

Change-Id: I1934fb75d5d7f4a50f44c06080fbcec4f6c81f02
Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

1 files changed, 242 insertions, 0 deletions

diff --git a/tools/daisy-img-modify.sh b/tools/daisy-img-modify.sh
new file mode 100755
index 00000000..60b60d26
--- /dev/null
+++ b/tools/daisy-img-modify.sh
@@ -0,0 +1,242 @@
+#!/bin/bash
+
+##############################################################################
+# Copyright (c) 2016 ZTE Coreporation 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
+##############################################################################
+
+# This script refers to the yardstick project.
+
+usage()
+{
+    cat << EOF
+USAGE: `basename $0` [-c sub-Command] [-a IP Address] [-g Gateway IP address] [-s image Size in GB]
+
+OPTIONS:
+  -c sub-command to modify the content
+  -a IP address for the sub-command to set in the image
+  -g gateway IP address for the sub-command to set in the image
+  -s image size of gigabytes. If it is absent, the image size will not be changed.
+
+EXAMPLE:
+    sudo `basename $0` -c centos-img-modify.sh -a 10.20.11.2 -g 10.20.11.1 -s 100
+EOF
+}
+
+while getopts "c:a:g:s:h" OPTION
+do
+    case $OPTION in
+        c)
+            cmd=${OPTARG}
+            if [ ! -x $cmd ]; then
+                echo "The $cmd does not exist or is not executable."
+                usage
+                exit 1
+            fi
+            ;;
+        a)
+            ipaddr=${OPTARG}
+            ;;
+        g)
+            gwaddr=${OPTARG}
+            ;;
+        s)
+            img_size=${OPTARG}
+            ;;
+        h)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "${OPTION} is not a valid argument"
+            usage
+            exit 0
+            ;;
+    esac
+done
+
+
+set -e
+set -x
+
+die() {
+    echo "error: $1" >&2
+    exit 1
+}
+
+test $(id -u) -eq 0 || die "You need be root to run this script"
+
+cmd=${cmd:-$(cd "$(dirname "$0")"; pwd)/centos-img-modify.sh}
+test -x $cmd
+
+if [[ -n $ipaddr ]]; then
+    export ipaddr=$ipaddr
+fi
+
+if [[ -n $gwaddr ]]; then
+    export gwaddr=$gwaddr
+fi
+
+mountdir="/mnt/daisy/centos"
+workdir=${WORKDIR:-"/tmp/workdir/daisy"}
+host=${HOST:-"cloud.centos.org"}
+filename=CentOS-7-x86_64-GenericCloud-1608.qcow2
+image_xz_path="centos/7/images/${filename}.xz"
+image_xz_url=${IMAGE_XZ_URL:-"http://${host}/${image_xz_path}"}
+sha256sum_path="centos/7/images/sha256sum.txt"
+sha256sum_url=${SHA256SUM_URL:-"http://${host}/${sha256sum_path}"}
+imgfile="${workdir}/centos7.qcow2"
+raw_imgfile="${workdir}/centos7.raw"
+
+# download and checksum base image, conditionally if local copy is outdated
+download() {
+    test -d $workdir || mkdir -p $workdir
+    cd $workdir
+    rm -f sha256sum.txt
+    wget $sha256sum_url
+
+    test -e $filename  &&  grep $filename$ sha256sum.txt | sha256sum -c
+    if [ $? -ne 0 ]; then
+        rm -f $filename
+        rm -f ${filename}.xz
+        wget -nc --progress=dot:giga $image_xz_url
+        xz -d -k ${filename}.xz
+        grep $filename$ sha256sum.txt | sha256sum -c
+    fi
+
+    for i in $(seq 0 9); do
+        [[ -e /dev/loop$i ]] || mknod -m 660 /dev/loop$i b 7 $i
+    done
+
+    qemu-img convert $filename $raw_imgfile
+    cd -
+}
+
+# install utils
+install_utils()
+{
+    which kpartx ||
+    if [ $? -ne 0 ]; then
+        yum install -y kpartx
+    fi
+
+    which growpart ||
+    if [ $? -ne 0 ]; then
+        yum install -y cloud-utils-growpart
+    fi
+
+    which xfs_growfs ||
+    if [ $? -ne 0 ]; then
+        yum install -y xfsprogs
+    fi
+}
+
+# resize image
+resize() {
+    install_utils
+
+    # resize the image
+    qemu-img resize $raw_imgfile ${img_size}G
+    qemu-img info $raw_imgfile
+    loopdevice=$(kpartx -l $raw_imgfile | head -1 | cut -f1 -d ' ')
+    kpartx -av $raw_imgfile
+    sleep 2
+    dmsetup ls
+    fdisk -l /dev/${loopdevice:0:5} || true
+    growpart /dev/${loopdevice:0:5} 1
+    dmsetup clear $loopdevice
+    kpartx -dv $raw_imgfile
+}
+
+# mount image
+setup() {
+    mkdir -p $mountdir
+
+    loopdevice=$(kpartx -l $raw_imgfile | head -1 | cut -f1 -d ' ')
+
+    kpartx -av $raw_imgfile
+    sleep 2
+    dmsetup ls
+    fdisk -l /dev/${loopdevice:0:5} || true
+    mount /dev/mapper/$loopdevice $mountdir
+    mount -t proc none ${mountdir}/proc
+
+    if [[ -n $img_size ]]; then
+        xfs_growfs /dev/mapper/$loopdevice
+    fi
+
+    chroot $mountdir df -h
+    cp $cmd $mountdir/$(basename $cmd)
+}
+
+# modify image running a script using in a chrooted environment
+modify() {
+    chroot $mountdir /$(basename $cmd)
+    rm -f $mountdir/$(basename $cmd)
+
+    umount $mountdir/proc
+    umount $mountdir
+
+    if dmsetup table | grep $loopdevice; then
+       dmsetup clear $loopdevice || true
+    fi
+
+    qemu-img convert -c -o compat=0.10 -O qcow2 $raw_imgfile $imgfile
+}
+
+# cleanup (umount) the image
+cleanup() {
+    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
+
+    dmesg -T | tail -50
+
+    cleanup
+
+    echo "Image build failed with $exitcode"
+
+    exit $exitcode
+}
+
+main() {
+    cleanup
+
+    trap "error_trap" EXIT SIGTERM
+
+    download
+    if [[ -n $img_size ]]; then
+        echo img_size=$img_size
+        resize
+    fi
+    setup
+    modify
+
+    trap - EXIT SIGTERM
+    cleanup
+
+    echo "the modified image is found here: $imgfile"
+}
+
+main
+