summaryrefslogtreecommitdiffstats
path: root/tools/vnftest-img-lxd-modify
blob: 5b54a7ce0677422419eb7c11d884dcba9cc7feaa (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
#!/bin/bash

##############################################################################
# Copyright 2018 EuropeanSoftwareMarketingLtd.
# ===================================================================
#  Licensed under the ApacheLicense, Version2.0 (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
#
# 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
##############################################################################
# vnftest comment: this is a modified copy of
# yardstick/tools/vnftest-img-lxd-modify

# vnftest-img-lxd-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:
# vnftest-img-lxd-modify /home/vnftest/tools/ubuntu-server-cloudimg-modify.sh
#
# Warning: the script will create files by default in:
#   /tmp/workspace/vnftest
# 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 $cmd
mountdir="/mnt/vnftest"
workspace=${WORKSPACE:-"/tmp/workspace/vnftest"}
host=${HOST:-"cloud-images.ubuntu.com"}
release=${RELEASE:-"xenial"}
image_path="${release}/current/${release}-server-cloudimg-amd64-root.tar.gz"
image_url=${IMAGE_URL:-"https://${host}/${image_path}"}
sha256sums_path="${release}/current/SHA256SUMS"
sha256sums_url=${SHA256SUMS_URL:-"https://${host}/${sha256sums_path}"}

imgfile="${workspace}/vnftest-image.tar.gz"
filename=$(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 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
    cd -
}

# extract files
setup() {
    mkdir -p $mountdir

    cp $cmd $mountdir/$(basename $cmd)

    cd $workspace
    tar zxvf $filename -C $mountdir
}

# 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

    tar zcvf $(basename $imgfile) $mountdir/
}

# cleanup the image
cleanup() {
    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