[995c968] | 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 | install_busybox() |
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| 24 | { |
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| 25 | rootfs=$1 |
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| 26 | name=$2 |
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| 27 | res=0 |
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| 28 | tree="\ |
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| 29 | $rootfs/selinux \ |
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| 30 | $rootfs/dev \ |
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| 31 | $rootfs/home \ |
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| 32 | $rootfs/root \ |
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| 33 | $rootfs/etc \ |
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| 34 | $rootfs/etc/init.d \ |
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| 35 | $rootfs/bin \ |
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| 36 | $rootfs/sbin \ |
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| 37 | $rootfs/proc \ |
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| 38 | $rootfs/mnt \ |
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| 39 | $rootfs/tmp \ |
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| 40 | $rootfs/var/log \ |
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| 41 | $rootfs/usr/share/udhcpc \ |
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| 42 | $rootfs/dev/pts \ |
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| 43 | $rootfs/dev/shm \ |
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| 44 | $rootfs/lib \ |
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| 45 | $rootfs/usr/lib \ |
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| 46 | $rootfs/lib64 \ |
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| 47 | $rootfs/usr/lib64" |
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| 48 | |
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| 49 | mkdir -p $tree || return 1 |
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| 50 | chmod 755 $tree || return 1 |
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| 51 | |
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| 52 | pushd $rootfs/dev > /dev/null || return 1 |
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| 53 | |
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| 54 | # minimal devices needed for busybox |
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| 55 | mknod tty c 5 0 || res=1 |
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| 56 | mknod console c 5 1 || res=1 |
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| 57 | chmod 666 tty console || res=1 |
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| 58 | mknod tty0 c 4 0 || res=1 |
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| 59 | mknod tty1 c 4 0 || res=1 |
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| 60 | mknod tty5 c 4 0 || res=1 |
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| 61 | chmod 666 tty0 || res=1 |
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| 62 | mknod ram0 b 1 0 || res=1 |
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| 63 | chmod 600 ram0 || res=1 |
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| 64 | mknod null c 1 3 || res=1 |
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| 65 | chmod 666 null || res=1 |
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| 66 | |
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| 67 | popd > /dev/null |
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| 68 | |
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| 69 | # root user defined |
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| 70 | cat <<EOF >> $rootfs/etc/passwd |
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| 71 | root:x:0:0:root:/root:/bin/sh |
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| 72 | EOF |
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| 73 | |
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| 74 | cat <<EOF >> $rootfs/etc/group |
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| 75 | root:x:0:root |
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| 76 | EOF |
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| 77 | |
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| 78 | # mount everything |
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| 79 | cat <<EOF >> $rootfs/etc/init.d/rcS |
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| 80 | #!/bin/sh |
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| 81 | /bin/syslogd |
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| 82 | /bin/mount -a |
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| 83 | /bin/udhcpc |
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| 84 | EOF |
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| 85 | |
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| 86 | # executable |
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| 87 | chmod 744 $rootfs/etc/init.d/rcS || return 1 |
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| 88 | |
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| 89 | # mount points |
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| 90 | cat <<EOF >> $rootfs/etc/fstab |
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| 91 | proc /proc proc defaults 0 0 |
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| 92 | shm /dev/shm tmpfs defaults 0 0 |
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| 93 | EOF |
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| 94 | |
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| 95 | # writable and readable for other |
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| 96 | chmod 644 $rootfs/etc/fstab || return 1 |
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| 97 | |
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| 98 | # launch rcS first then make a console available |
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| 99 | # and propose a shell on the tty, the last one is |
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| 100 | # not needed |
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| 101 | cat <<EOF >> $rootfs/etc/inittab |
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| 102 | ::sysinit:/etc/init.d/rcS |
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| 103 | tty1::respawn:/bin/getty -L tty1 115200 vt100 |
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| 104 | console::askfirst:/bin/sh |
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| 105 | EOF |
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| 106 | # writable and readable for other |
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| 107 | chmod 644 $rootfs/etc/inittab || return 1 |
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| 108 | |
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| 109 | cat <<EOF >> $rootfs/usr/share/udhcpc/default.script |
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| 110 | #!/bin/sh |
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| 111 | |
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| 112 | case "\$1" in |
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| 113 | deconfig) |
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| 114 | ip addr flush dev \$interface |
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| 115 | ;; |
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| 116 | |
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| 117 | renew|bound) |
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| 118 | |
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| 119 | # flush all the routes |
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| 120 | if [ -n "\$router" ]; then |
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| 121 | ip route del default 2> /dev/null |
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| 122 | fi |
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| 123 | |
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| 124 | # check broadcast |
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| 125 | if [ -n "\$broadcast" ]; then |
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| 126 | broadcast="broadcast \$broadcast" |
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| 127 | fi |
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| 128 | |
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| 129 | # add a new ip address |
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| 130 | ip addr add \$ip/\$mask \$broadcast dev \$interface |
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| 131 | |
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| 132 | if [ -n "\$router" ]; then |
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| 133 | ip route add default via \$router dev \$interface |
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| 134 | fi |
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| 135 | |
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| 136 | [ -n "\$domain" ] && echo search \$domain > /etc/resolv.conf |
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| 137 | for i in \$dns ; do |
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| 138 | echo nameserver \$i >> /etc/resolv.conf |
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| 139 | done |
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| 140 | ;; |
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| 141 | esac |
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| 142 | exit 0 |
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| 143 | EOF |
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| 144 | |
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| 145 | chmod 744 $rootfs/usr/share/udhcpc/default.script |
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| 146 | |
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| 147 | return $res |
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| 148 | } |
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| 149 | |
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| 150 | configure_busybox() |
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| 151 | { |
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| 152 | rootfs=$1 |
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| 153 | |
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| 154 | functions="\ |
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| 155 | [ [[ addgroup adduser adjtimex ar arp arping ash awk basename \ |
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| 156 | brctl bunzip2 bzcat bzip2 cal cat catv chattr chgrp chmod \ |
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| 157 | chown chpasswd chpst chroot chrt chvt cksum clear cmp comm \ |
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| 158 | cp cpio crond crontab cryptpw cut date dc dd deallocvt \ |
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| 159 | delgroup deluser df dhcprelay diff dirname dmesg dnsd dos2unix \ |
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| 160 | du dumpkmap dumpleases echo ed egrep eject env envdir envuidgid \ |
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| 161 | ether-wake expand expr fakeidentd false fbset fdformat fdisk \ |
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| 162 | fetchmail fgrep find findfs fold free freeramdisk fsck \ |
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| 163 | fsck.minix ftpget ftpput fuser getopt getty grep gunzip gzip \ |
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| 164 | halt hdparm head hexdump hostid hostname httpd hwclock id \ |
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| 165 | ifconfig ifdown ifenslave ifup inetd init insmod install ip \ |
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| 166 | ipaddr ipcalc ipcrm ipcs iplink iproute iprule iptunnel \ |
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| 167 | kbd_mode kill killall killall5 klogd last length less linux32 \ |
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| 168 | linux64 linuxrc ln loadfont loadkmap logger login logname \ |
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| 169 | logread losetup lpd lpq lpr ls lsattr lsmod lzmacat makedevs \ |
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| 170 | md5sum mdev mesg microcom mkdir mkfifo mkfs.minix mknod mkswap \ |
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| 171 | mktemp modprobe more mount mountpoint msh mt mv nameif nc \ |
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| 172 | netstat nice nmeter nohup nslookup od openvt passwd patch \ |
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| 173 | pgrep pidof ping ping6 pipe_progress pivot_root pkill poweroff \ |
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| 174 | printenv printf ps pscan pwd raidautorun rdate readahead \ |
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| 175 | readlink readprofile realpath reboot renice reset resize rm \ |
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| 176 | rmdir rmmod route rpm rpm2cpio run-parts runlevel runsv \ |
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| 177 | runsvdir rx script sed sendmail seq setarch setconsole \ |
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| 178 | setkeycodes setlogcons setsid setuidgid sh sha1sum slattach \ |
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| 179 | sleep softlimit sort split start-stop-daemon stat strings \ |
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| 180 | stty su sulogin sum sv svlogd swapoff swapon switch_root \ |
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| 181 | sync sysctl syslogd tac tail tar taskset tcpsvd tee telnet \ |
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| 182 | telnetd test tftp tftpd time top touch tr traceroute \ |
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| 183 | true tty ttysize udhcpc udhcpd udpsvd umount uname uncompress \ |
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| 184 | unexpand uniq unix2dos unlzma unzip uptime usleep uudecode \ |
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| 185 | uuencode vconfig vi vlock watch watchdog wc wget which \ |
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| 186 | who whoami xargs yes zcat zcip" |
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| 187 | |
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| 188 | type busybox >/dev/null |
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| 189 | |
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| 190 | if [ $? -ne 0 ]; then |
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| 191 | echo "busybox executable is not accessible" |
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| 192 | return 1 |
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| 193 | fi |
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| 194 | |
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| 195 | file $(which busybox) | grep -q "statically linked" |
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| 196 | if [ $? -ne 0 ]; then |
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| 197 | echo "warning : busybox is not statically linked." |
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| 198 | echo "warning : The template script may not correctly" |
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| 199 | echo "warning : setup the container environment." |
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| 200 | fi |
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| 201 | |
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| 202 | # copy busybox in the rootfs |
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| 203 | cp $(which busybox) $rootfs/bin |
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| 204 | if [ $? -ne 0 ]; then |
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| 205 | echo "failed to copy busybox in the rootfs" |
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| 206 | return 1 |
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| 207 | fi |
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| 208 | |
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| 209 | # do hardlink to busybox for the different commands |
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| 210 | for i in $functions; do ln $rootfs/bin/busybox $rootfs/bin/$i; done |
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| 211 | |
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| 212 | # relink /sbin/init |
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| 213 | ln $rootfs/bin/busybox $rootfs/sbin/init |
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| 214 | |
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| 215 | # passwd exec must be setuid |
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| 216 | chmod +s $rootfs/bin/passwd |
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| 217 | touch $rootfs/etc/shadow |
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| 218 | chroot $rootfs /bin/passwd -d root |
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| 219 | |
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| 220 | echo "No password for 'root', please change !" |
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| 221 | |
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| 222 | return 0 |
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| 223 | } |
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| 224 | |
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| 225 | copy_configuration() |
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| 226 | { |
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| 227 | path=$1 |
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| 228 | rootfs=$2 |
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| 229 | name=$3 |
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| 230 | |
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| 231 | cat <<EOF >> $path/config |
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| 232 | lxc.utsname = $name |
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| 233 | lxc.tty = 1 |
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| 234 | lxc.pts = 1 |
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| 235 | lxc.rootfs = $rootfs |
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| 236 | # uncomment the next line to run the container unconfined: |
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| 237 | #lxc.aa_profile = unconfined |
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| 238 | EOF |
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| 239 | |
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| 240 | if [ -d "$rootfs/lib" ]; then |
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| 241 | cat <<EOF >> $path/config |
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| 242 | lxc.mount.entry=/lib $rootfs/lib none ro,bind 0 0 |
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| 243 | lxc.mount.entry=/usr/lib $rootfs/usr/lib none ro,bind 0 0 |
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| 244 | EOF |
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| 245 | fi |
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| 246 | |
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| 247 | if [ -d "/lib64" ] && [ -d "$rootfs/lib64" ]; then |
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| 248 | cat <<EOF >> $path/config |
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| 249 | lxc.mount.entry=/lib64 $rootfs/lib64 none ro,bind 0 0 |
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| 250 | EOF |
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| 251 | fi |
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| 252 | |
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| 253 | if [ -d "/usr/lib64" ] && [ -d "$rootfs/usr/lib64" ]; then |
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| 254 | cat <<EOF >> $path/config |
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| 255 | lxc.mount.entry=/usr/lib64 $rootfs/usr/lib64 none ro,bind 0 0 |
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| 256 | EOF |
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| 257 | fi |
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| 258 | } |
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| 259 | |
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| 260 | usage() |
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| 261 | { |
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| 262 | cat <<EOF |
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| 263 | $1 -h|--help -p|--path=<path> |
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| 264 | EOF |
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| 265 | return 0 |
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| 266 | } |
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| 267 | |
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| 268 | options=$(getopt -o hp:n: -l help,path:,name: -- "$@") |
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| 269 | if [ $? -ne 0 ]; then |
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| 270 | usage $(basename $0) |
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| 271 | exit 1 |
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| 272 | fi |
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| 273 | eval set -- "$options" |
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| 274 | |
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| 275 | while true |
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| 276 | do |
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| 277 | case "$1" in |
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| 278 | -h|--help) usage $0 && exit 0;; |
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| 279 | -p|--path) path=$2; shift 2;; |
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| 280 | -n|--name) name=$2; shift 2;; |
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| 281 | --) shift 1; break ;; |
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| 282 | *) break ;; |
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| 283 | esac |
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| 284 | done |
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| 285 | |
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| 286 | if [ "$(id -u)" != "0" ]; then |
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| 287 | echo "This script should be run as 'root'" |
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| 288 | exit 1 |
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| 289 | fi |
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| 290 | |
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| 291 | if [ -z "$path" ]; then |
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| 292 | echo "'path' parameter is required" |
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| 293 | exit 1 |
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| 294 | fi |
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| 295 | |
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| 296 | rootfs=$path/rootfs |
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| 297 | |
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| 298 | install_busybox $rootfs $name |
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| 299 | if [ $? -ne 0 ]; then |
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| 300 | echo "failed to install busybox's rootfs" |
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| 301 | exit 1 |
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| 302 | fi |
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| 303 | |
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| 304 | configure_busybox $rootfs |
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| 305 | if [ $? -ne 0 ]; then |
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| 306 | echo "failed to configure busybox template" |
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| 307 | exit 1 |
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| 308 | fi |
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| 309 | |
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| 310 | copy_configuration $path $rootfs $name |
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| 311 | if [ $? -ne 0 ]; then |
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| 312 | echo "failed to write configuration file" |
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| 313 | exit 1 |
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| 314 | fi |
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