blob: 3c2db7cd79adc9f91bbe10a57620fc65c55a6006 (
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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
#!/bin/sh
install_alpine() {
rootfs="$1"
shift
mkdir -p "$rootfs"/etc/apk || return 1
cp -r ${keys_dir:-/etc/apk/keys} "$rootfs"/etc/apk/
if [ -n "$repository" ]; then
echo "$repository" > "$rootfs"/etc/apk/repositories
else
cp /etc/apk/repositories "$rootfs"/etc/apk/repositories || return 1
fi
opt_arch=
if [ -n "$apk_arch" ]; then
opt_arch="--arch $apk_arch"
fi
${APK:-apk} add -U --initdb --root $rootfs $opt_arch "$@" alpine-base
}
configure_alpine() {
rootfs="$1"
echo "Setting up /etc/inittab"
cat >"$rootfs"/etc/inittab<<EOF
::sysinit:/sbin/rc sysinit
::wait:/sbin/rc default
tty1:12345:respawn:/sbin/getty 38400 tty1
::ctrlaltdel:/sbin/reboot
::shutdown:/sbin/rc shutdown
EOF
# set up nameserver
grep nameserver /etc/resolv.conf > "$rootfs/etc/resolv.conf"
# configure the network using the dhcp
# note that lxc will set up lo interface
cat <<EOF > $rootfs/etc/network/interfaces
#auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
EOF
# set the hostname
echo $hostname > $rootfs/etc/hostname
# missing device nodes
echo "Setting up device nodes"
mkdir -p -m 755 "$rootfs/dev/pts"
mkdir -p -m 1777 "$rootfs/dev/shm"
mknod -m 666 "$rootfs/dev/full" c 1 7
mknod -m 666 "$rootfs/dev/random" c 1 8
mknod -m 666 "$rootfs/dev/urandom" c 1 9
mknod -m 666 "$rootfs/dev/tty0" c 4 0
mknod -m 666 "$rootfs/dev/tty1" c 4 1
mknod -m 666 "$rootfs/dev/tty2" c 4 2
mknod -m 666 "$rootfs/dev/tty3" c 4 3
mknod -m 666 "$rootfs/dev/tty4" c 4 4
# mknod -m 600 "$rootfs/dev/initctl" p
mknod -m 666 "$rootfs/dev/tty" c 5 0
mknod -m 666 "$rootfs/dev/console" c 5 1
mknod -m 666 "$rootfs/dev/ptmx" c 5 2
# start services
ln -s /etc/init.d/syslog "$rootfs"/etc/runlevels/default/syslog
return 0
}
copy_configuration() {
path=$1
rootfs=$2
hostname=$3
grep -q "^lxc.rootfs" $path/config 2>/dev/null \
|| echo "lxc.rootfs = $rootfs" >> $path/config
if [ -n "$lxc_arch" ]; then
echo "lxc.arch = $lxc_arch" >> $path/config
fi
lxc_network_link_line="# lxc.network.link = br0"
for br in lxcbr0 virbr0 br0; do
if [ -d /sys/class/net/$br/bridge ]; then
lxc_network_link_line="lxc.network.link = $br"
break
fi
done
if ! grep -q "^lxc.network.type" $path/config 2>/dev/null; then
cat <<EOF >> $path/config
lxc.network.type = veth
$lxc_network_link_line
lxc.network.flags = up
EOF
fi
# if there is exactly one veth network entry, make sure it has an
# associated mac address.
nics=$(grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l)
if [ "$nics" -eq 1 ] && ! grep -q "^lxc.network.hwaddr" $path/config; then
# see http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
hwaddr="fe:$(dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 | \
head -1 |awk '{print $2}' | cut -c1-10 |\
sed 's/\(..\)/\1:/g; s/.$//')"
echo "lxc.network.hwaddr = $hwaddr" >> $path/config
fi
cat <<EOF >> $path/config
lxc.tty = 4
lxc.pts = 1024
lxc.utsname = $hostname
# When using LXC with apparmor, uncomment the next line to run unconfined:
#lxc.aa_profile = unconfined
# devices
lxc.cgroup.devices.deny = a
# /dev/null and zero
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
# consoles
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm
# /dev/{,u}random
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# rtc
lxc.cgroup.devices.allow = c 254:0 rwm
# mounts point
lxc.mount.entry=proc proc proc nodev,noexec,nosuid 0 0
lxc.mount.entry=run run tmpfs nodev,noexec,nosuid,relatime,size=1m,mode=0755 0 0
lxc.mount.entry=none dev/pts devpts gid=5,mode=620 0 0
EOF
return 0
}
die() {
echo "$@" >&2
exit 1
}
usage() {
cat >&2 <<EOF
Usage: $(basename $0) [-h|--help] [-r|--repository <url>] [-a|--arch <arch>]
-p|--path <path> -n|--name <name> [PKG...]
EOF
}
usage_err() {
usage
exit 1
}
optarg_check() {
if [ -z "$2" ]; then
usage_err "option '$1' requires an argument"
fi
}
default_path=/var/lib/lxc
while [ $# -gt 0 ]; do
opt="$1"
shift
case "$opt" in
-h|--help)
usage
exit 0
;;
-n|--name)
optarg_check $opt "$1"
name=$1
shift
;;
-p|--path)
optarg_check $opt "$1"
path=$1
shift
;;
-r|--repository)
optarg_check $opt "$1"
repository=$1
shift
;;
-a|--arch)
optarg_check $opt "$1"
arch=$1
shift
;;
--)
break;;
--*=*)
# split --myopt=foo=bar into --myopt foo=bar
set -- ${opt%=*} ${opt#*=} "$@"
;;
-?)
usage_err "unknown option '$opt'"
;;
-*)
# split opts -abc into -a -b -c
set -- $(echo "${opt#-}" | sed 's/\(.\)/ -\1/g') "$@"
;;
esac
done
[ -z "$name" ] && usage_err
if [ -z "${path}" ]; then
path="${default_path}/${name}"
fi
rootfs=`awk -F= '$1 ~ /^lxc.rootfs/ { print $2 }' "$path/config" 2>/dev/null`
if [ -z "$rootfs" ]; then
rootfs="${path}/rootfs"
fi
lxc_arch=$arch
apk_arch=$arch
case "$arch" in
i[3-6]86)
apk_arch=x86;;
x86)
lxc_arch=i686;;
x86_64|"") ;;
*) die "unsupported architecture: $arch";;
esac
install_alpine "$rootfs" "$@" || die "Failed to install rootfs for $name"
configure_alpine "$rootfs" "$name" || die "Failed to configure $name"
copy_configuration "$path" "$rootfs" "$name"
|
