[88df158] | 1 | #!/bin/bash |
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| 2 | |
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| 3 | # |
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| 4 | # lxc: linux Container library |
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| 5 | |
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| 6 | # Authors: |
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| 7 | # Daniel Lezcano <daniel.lezcano@free.fr> |
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| 8 | |
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| 9 | # This library is free software; you can redistribute it and/or |
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| 10 | # modify it under the terms of the GNU Lesser General Public |
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| 11 | # License as published by the Free Software Foundation; either |
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| 12 | # version 2.1 of the License, or (at your option) any later version. |
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| 13 | |
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| 14 | # This library is distributed in the hope that it will be useful, |
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| 15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | # Lesser General Public License for more details. |
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| 18 | |
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| 19 | # You should have received a copy of the GNU Lesser General Public |
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| 20 | # License along with this library; if not, write to the Free Software |
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| 21 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 22 | |
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| 23 | SUITE=${SUITE:-squeeze} |
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| 24 | MIRROR=${MIRROR:-http://cdn.debian.net/debian} |
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| 25 | |
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| 26 | configure_debian() |
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| 27 | { |
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| 28 | rootfs=$1 |
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| 29 | hostname=$2 |
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| 30 | |
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| 31 | # squeeze only has /dev/tty and /dev/tty0 by default, |
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| 32 | # therefore creating missing device nodes for tty1-4. |
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| 33 | for tty in $(seq 1 4); do |
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| 34 | if [ ! -e $rootfs/dev/tty$tty ]; then |
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| 35 | mknod $rootfs/dev/tty$tty c 4 $tty |
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| 36 | fi |
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| 37 | done |
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| 38 | |
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| 39 | # configure the inittab |
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| 40 | cat <<EOF > $rootfs/etc/inittab |
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| 41 | id:3:initdefault: |
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| 42 | si::sysinit:/etc/init.d/rcS |
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| 43 | l0:0:wait:/etc/init.d/rc 0 |
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| 44 | l1:1:wait:/etc/init.d/rc 1 |
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| 45 | l2:2:wait:/etc/init.d/rc 2 |
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| 46 | l3:3:wait:/etc/init.d/rc 3 |
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| 47 | l4:4:wait:/etc/init.d/rc 4 |
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| 48 | l5:5:wait:/etc/init.d/rc 5 |
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| 49 | l6:6:wait:/etc/init.d/rc 6 |
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| 50 | # Normally not reached, but fallthrough in case of emergency. |
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| 51 | z6:6:respawn:/sbin/sulogin |
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| 52 | 1:2345:respawn:/sbin/getty 38400 console |
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| 53 | c1:12345:respawn:/sbin/getty 38400 tty1 linux |
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| 54 | c2:12345:respawn:/sbin/getty 38400 tty2 linux |
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| 55 | c3:12345:respawn:/sbin/getty 38400 tty3 linux |
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| 56 | c4:12345:respawn:/sbin/getty 38400 tty4 linux |
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| 57 | p6::ctrlaltdel:/sbin/init 6 |
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| 58 | p0::powerfail:/sbin/init 0 |
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| 59 | EOF |
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| 60 | |
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| 61 | # disable selinux in debian |
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| 62 | mkdir -p $rootfs/selinux |
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| 63 | echo 0 > $rootfs/selinux/enforce |
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| 64 | |
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| 65 | # configure the network using the dhcp |
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| 66 | cat <<EOF > $rootfs/etc/network/interfaces |
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| 67 | auto lo |
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| 68 | iface lo inet loopback |
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| 69 | |
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| 70 | auto eth0 |
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| 71 | iface eth0 inet dhcp |
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| 72 | EOF |
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| 73 | |
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| 74 | # set the hostname |
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| 75 | cat <<EOF > $rootfs/etc/hostname |
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| 76 | $hostname |
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| 77 | EOF |
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| 78 | |
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| 79 | # reconfigure some services |
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| 80 | if [ -z "$LANG" ]; then |
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| 81 | chroot $rootfs locale-gen en_US.UTF-8 UTF-8 |
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| 82 | chroot $rootfs update-locale LANG=en_US.UTF-8 |
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| 83 | else |
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| 84 | chroot $rootfs locale-gen $LANG $(echo $LANG | cut -d. -f2) |
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| 85 | chroot $rootfs update-locale LANG=$LANG |
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| 86 | fi |
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| 87 | |
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| 88 | # remove pointless services in a container |
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| 89 | chroot $rootfs /usr/sbin/update-rc.d -f checkroot.sh remove |
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| 90 | chroot $rootfs /usr/sbin/update-rc.d -f umountfs remove |
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| 91 | chroot $rootfs /usr/sbin/update-rc.d -f hwclock.sh remove |
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| 92 | chroot $rootfs /usr/sbin/update-rc.d -f hwclockfirst.sh remove |
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| 93 | |
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| 94 | echo "root:root" | chroot $rootfs chpasswd |
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| 95 | echo "Root password is 'root', please change !" |
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| 96 | |
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| 97 | return 0 |
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| 98 | } |
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| 99 | |
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| 100 | cleanup() |
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| 101 | { |
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| 102 | rm -rf $cache/partial-$SUITE-$arch |
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| 103 | rm -rf $cache/rootfs-$SUITE-$arch |
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| 104 | } |
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| 105 | |
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| 106 | download_debian() |
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| 107 | { |
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| 108 | packages=\ |
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| 109 | ifupdown,\ |
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| 110 | locales,\ |
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| 111 | libui-dialog-perl,\ |
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| 112 | dialog,\ |
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| 113 | isc-dhcp-client,\ |
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| 114 | netbase,\ |
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| 115 | net-tools,\ |
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| 116 | iproute,\ |
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| 117 | openssh-server |
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| 118 | |
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| 119 | cache=$1 |
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| 120 | arch=$2 |
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| 121 | |
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| 122 | trap cleanup EXIT SIGHUP SIGINT SIGTERM |
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| 123 | # check the mini debian was not already downloaded |
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| 124 | mkdir -p "$cache/partial-$SUITE-$arch" |
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| 125 | if [ $? -ne 0 ]; then |
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| 126 | echo "Failed to create '$cache/partial-$SUITE-$arch' directory" |
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| 127 | return 1 |
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| 128 | fi |
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| 129 | |
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| 130 | # download a mini debian into a cache |
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| 131 | echo "Downloading debian minimal ..." |
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| 132 | debootstrap --verbose --variant=minbase --arch=$arch \ |
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| 133 | --include=$packages \ |
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| 134 | "$SUITE" "$cache/partial-$SUITE-$arch" $MIRROR |
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| 135 | if [ $? -ne 0 ]; then |
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| 136 | echo "Failed to download the rootfs, aborting." |
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| 137 | return 1 |
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| 138 | fi |
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| 139 | |
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| 140 | mv "$1/partial-$SUITE-$arch" "$1/rootfs-$SUITE-$arch" |
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| 141 | echo "Download complete." |
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| 142 | trap EXIT |
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| 143 | trap SIGINT |
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| 144 | trap SIGTERM |
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| 145 | trap SIGHUP |
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| 146 | |
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| 147 | return 0 |
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| 148 | } |
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| 149 | |
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| 150 | copy_debian() |
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| 151 | { |
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| 152 | cache=$1 |
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| 153 | arch=$2 |
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| 154 | rootfs=$3 |
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| 155 | |
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| 156 | # make a local copy of the minidebian |
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| 157 | echo -n "Copying rootfs to $rootfs..." |
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| 158 | mkdir -p $rootfs |
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| 159 | rsync -a "$cache/rootfs-$SUITE-$arch"/ $rootfs/ || return 1 |
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| 160 | return 0 |
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| 161 | } |
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| 162 | |
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| 163 | install_debian() |
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| 164 | { |
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| 165 | cache="/var/cache/lxc/debian" |
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| 166 | rootfs=$1 |
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| 167 | mkdir -p /var/lock/subsys/ |
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| 168 | ( |
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| 169 | flock -x 200 |
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| 170 | if [ $? -ne 0 ]; then |
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| 171 | echo "Cache repository is busy." |
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| 172 | return 1 |
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| 173 | fi |
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| 174 | |
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| 175 | arch=$(dpkg --print-architecture) |
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| 176 | |
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| 177 | echo "Checking cache download in $cache/rootfs-$SUITE-$arch ... " |
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| 178 | if [ ! -e "$cache/rootfs-$SUITE-$arch" ]; then |
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| 179 | download_debian $cache $arch |
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| 180 | if [ $? -ne 0 ]; then |
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| 181 | echo "Failed to download 'debian base'" |
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| 182 | return 1 |
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| 183 | fi |
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| 184 | fi |
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| 185 | |
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| 186 | copy_debian $cache $arch $rootfs |
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| 187 | if [ $? -ne 0 ]; then |
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| 188 | echo "Failed to copy rootfs" |
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| 189 | return 1 |
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| 190 | fi |
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| 191 | |
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| 192 | return 0 |
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| 193 | |
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| 194 | ) 200>/var/lock/subsys/lxc |
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| 195 | |
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| 196 | return $? |
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| 197 | } |
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| 198 | |
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| 199 | copy_configuration() |
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| 200 | { |
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| 201 | path=$1 |
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| 202 | rootfs=$2 |
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| 203 | hostname=$3 |
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| 204 | |
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| 205 | grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config |
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| 206 | cat <<EOF >> $path/config |
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| 207 | lxc.tty = 4 |
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| 208 | lxc.pts = 1024 |
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| 209 | lxc.utsname = $hostname |
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| 210 | # uncomment the next line to run the container unconfined: |
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| 211 | #lxc.aa_profile = unconfined |
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| 212 | lxc.cgroup.devices.deny = a |
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| 213 | # /dev/null and zero |
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| 214 | lxc.cgroup.devices.allow = c 1:3 rwm |
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| 215 | lxc.cgroup.devices.allow = c 1:5 rwm |
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| 216 | # consoles |
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| 217 | lxc.cgroup.devices.allow = c 5:1 rwm |
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| 218 | lxc.cgroup.devices.allow = c 5:0 rwm |
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| 219 | lxc.cgroup.devices.allow = c 4:0 rwm |
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| 220 | lxc.cgroup.devices.allow = c 4:1 rwm |
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| 221 | # /dev/{,u}random |
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| 222 | lxc.cgroup.devices.allow = c 1:9 rwm |
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| 223 | lxc.cgroup.devices.allow = c 1:8 rwm |
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| 224 | lxc.cgroup.devices.allow = c 136:* rwm |
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| 225 | lxc.cgroup.devices.allow = c 5:2 rwm |
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| 226 | # rtc |
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| 227 | lxc.cgroup.devices.allow = c 254:0 rwm |
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| 228 | |
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| 229 | # mounts point |
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| 230 | lxc.mount.entry=proc proc proc nodev,noexec,nosuid 0 0 |
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| 231 | lxc.mount.entry=sysfs sys sysfs defaults 0 0 |
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| 232 | EOF |
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| 233 | |
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| 234 | if [ $? -ne 0 ]; then |
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| 235 | echo "Failed to add configuration" |
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| 236 | return 1 |
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| 237 | fi |
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| 238 | |
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| 239 | return 0 |
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| 240 | } |
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| 241 | |
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| 242 | clean() |
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| 243 | { |
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| 244 | cache="/var/cache/lxc/debian" |
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| 245 | |
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| 246 | if [ ! -e $cache ]; then |
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| 247 | exit 0 |
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| 248 | fi |
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| 249 | |
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| 250 | # lock, so we won't purge while someone is creating a repository |
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| 251 | ( |
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| 252 | flock -n -x 200 |
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| 253 | if [ $? != 0 ]; then |
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| 254 | echo "Cache repository is busy." |
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| 255 | exit 1 |
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| 256 | fi |
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| 257 | |
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| 258 | echo -n "Purging the download cache..." |
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| 259 | rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1 |
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| 260 | exit 0 |
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| 261 | |
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| 262 | ) 200>/var/lock/subsys/lxc |
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| 263 | } |
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| 264 | |
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| 265 | usage() |
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| 266 | { |
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| 267 | cat <<EOF |
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| 268 | $1 -h|--help -p|--path=<path> --clean |
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| 269 | EOF |
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| 270 | return 0 |
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| 271 | } |
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| 272 | |
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| 273 | options=$(getopt -o hp:n:c -l help,path:,name:,clean -- "$@") |
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| 274 | if [ $? -ne 0 ]; then |
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| 275 | usage $(basename $0) |
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| 276 | exit 1 |
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| 277 | fi |
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| 278 | eval set -- "$options" |
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| 279 | |
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| 280 | while true |
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| 281 | do |
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| 282 | case "$1" in |
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| 283 | -h|--help) usage $0 && exit 0;; |
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| 284 | -p|--path) path=$2; shift 2;; |
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| 285 | -n|--name) name=$2; shift 2;; |
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| 286 | -c|--clean) clean=$2; shift 2;; |
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| 287 | --) shift 1; break ;; |
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| 288 | *) break ;; |
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| 289 | esac |
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| 290 | done |
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| 291 | |
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| 292 | if [ ! -z "$clean" -a -z "$path" ]; then |
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| 293 | clean || exit 1 |
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| 294 | exit 0 |
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| 295 | fi |
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| 296 | |
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| 297 | type debootstrap |
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| 298 | if [ $? -ne 0 ]; then |
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| 299 | echo "'debootstrap' command is missing" |
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| 300 | exit 1 |
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| 301 | fi |
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| 302 | |
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| 303 | if [ -z "$path" ]; then |
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| 304 | echo "'path' parameter is required" |
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| 305 | exit 1 |
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| 306 | fi |
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| 307 | |
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| 308 | if [ "$(id -u)" != "0" ]; then |
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| 309 | echo "This script should be run as 'root'" |
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| 310 | exit 1 |
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| 311 | fi |
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| 312 | |
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| 313 | # detect rootfs |
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| 314 | config="$path/config" |
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| 315 | if grep -q '^lxc.rootfs' $config 2>/dev/null ; then |
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| 316 | rootfs=`grep 'lxc.rootfs =' $config | awk -F= '{ print $2 }'` |
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| 317 | else |
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| 318 | rootfs=$path/rootfs |
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| 319 | fi |
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| 320 | |
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| 321 | |
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| 322 | install_debian $rootfs |
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| 323 | if [ $? -ne 0 ]; then |
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| 324 | echo "failed to install debian" |
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| 325 | exit 1 |
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| 326 | fi |
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| 327 | |
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| 328 | configure_debian $rootfs $name |
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| 329 | if [ $? -ne 0 ]; then |
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| 330 | echo "failed to configure debian for a container" |
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| 331 | exit 1 |
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| 332 | fi |
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| 333 | |
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| 334 | copy_configuration $path $rootfs $name |
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| 335 | if [ $? -ne 0 ]; then |
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| 336 | echo "failed write configuration file" |
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| 337 | exit 1 |
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| 338 | fi |
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| 339 | |
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| 340 | if [ ! -z $clean ]; then |
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| 341 | clean || exit 1 |
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| 342 | exit 0 |
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| 343 | fi |
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