blob: 599768555528a32f1c42483bc944307c009df625 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
#!/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-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-modify /home/yardstick/tools/ubuntu-server-cloudimg-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 -o $# -eq 2 || die "no image specific script as argument"
test $(id -u) -eq 0 || die "should invoke using sudo"
cmd=$1
RELEASE=$2
test -x $cmd
mountdir="/mnt/yardstick"
workspace=${WORKSPACE:-"/tmp/workspace/yardstick"}
host=${HOST:-"cloud-images.ubuntu.com"}
release=${RELEASE:-"xenial"}
boot_mode="disk1"
if [[ "${YARD_IMG_ARCH}" = "arm64" ]]; then
boot_mode="uefi1"
fi
image_path="${release}/current/${release}-server-cloudimg-${YARD_IMG_ARCH}-${boot_mode}.img"
image_url=${IMAGE_URL:-"https://${host}/${image_path}"}
sha256sums_path="${release}/current/SHA256SUMS"
sha256sums_url=${SHA256SUMS_URL:-"https://${host}/${sha256sums_path}"}
imgfile="${workspace}/yardstick-image.img"
raw_imgfile_basename="yardstick-${release}-server.raw"
raw_imgfile="${workspace}/${raw_imgfile_basename}"
filename=$(basename $image_url)
apt-get install -y parted
# download and checksum base image, conditionally if local copy is outdated
download() {
test -d $workspace || mkdir -p $workspace
cd $workspace
rm -f SHA256SUMS # always download the checksum file to a detect stale image
wget $sha256sums_url
test -e $filename || wget -nc --progress=dot:giga $image_url
grep $filename SHA256SUMS | sha256sum -c ||
if [ $? -ne 0 ]; then
rm $filename
wget -nc --progress=dot:giga $image_url
grep $filename SHA256SUMS | sha256sum -c
fi
for i in $(seq 0 9); do
[ -a /dev/loop$i ] || mknod -m 660 /dev/loop$i b 7 $i
done
qemu-img convert $filename $raw_imgfile
cd -
}
# mount image
setup() {
# qemu-img resize $raw_imgfile +5GB
mkdir -p $mountdir
loopdevice=$(kpartx -l $raw_imgfile | head -1 | cut -f1 -d ' ')
kpartx -av $raw_imgfile
# for trouble shooting
sleep 2
dmsetup ls
parted -l /dev/${loopdevice:0:5} || true
mount /dev/mapper/$loopdevice $mountdir
mount -t proc none $mountdir/proc
cp $cmd $mountdir/$(basename $cmd)
if [ "${YARD_IMG_ARCH}" = "arm64" ]; then
cp /usr/bin/qemu-aarch64-static $mountdir/usr/bin
fi
}
# modify image running a script using in a chrooted environment
modify() {
# resolv.conf does not exist in base image, pass nameserver value from host
nameserver_ip=$(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
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 $mountdir
mount | grep "/mnt/${release}" && umount "/mnt/${release}"
if [ -f "${raw_imgfile}" ]; then
#kpartx -dv $raw_imgfile sometimes failed, we should checked it agein.
#if [ -z "$(kpartx -l $raw_imgfile | grep 'loop deleted')" ]; then
# kpartx -dv $raw_imgfile
#fi
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
setup
modify
trap - EXIT SIGTERM
cleanup
echo "the modified image is found here: $imgfile"
}
main
|
