[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_sshd() |
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| 24 | { |
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| 25 | rootfs=$1 |
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| 26 | |
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| 27 | tree="\ |
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| 28 | $rootfs/var/run/sshd \ |
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| 29 | $rootfs/var/empty/sshd \ |
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| 30 | $rootfs/var/lib/empty/sshd \ |
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| 31 | $rootfs/etc/ssh \ |
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| 32 | $rootfs/dev/shm \ |
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| 33 | $rootfs/run/shm \ |
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| 34 | $rootfs/proc \ |
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| 35 | $rootfs/bin \ |
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| 36 | $rootfs/sbin \ |
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| 37 | $rootfs/usr \ |
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| 38 | $rootfs/tmp \ |
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| 39 | $rootfs/home \ |
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| 40 | $rootfs/root \ |
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| 41 | $rootfs/lib \ |
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| 42 | $rootfs/lib64" |
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| 43 | |
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| 44 | mkdir -p $tree |
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| 45 | if [ $? -ne 0 ]; then |
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| 46 | return 1 |
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| 47 | fi |
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| 48 | |
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| 49 | return 0 |
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| 50 | } |
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| 51 | |
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| 52 | configure_sshd() |
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| 53 | { |
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| 54 | rootfs=$1 |
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| 55 | |
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| 56 | cat <<EOF > $rootfs/etc/passwd |
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| 57 | root:x:0:0:root:/root:/bin/bash |
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| 58 | sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin |
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| 59 | EOF |
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| 60 | |
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| 61 | cat <<EOF > $rootfs/etc/group |
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| 62 | root:x:0:root |
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| 63 | sshd:x:74: |
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| 64 | EOF |
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| 65 | |
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| 66 | ssh-keygen -t rsa -f $rootfs/etc/ssh/ssh_host_rsa_key |
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| 67 | ssh-keygen -t dsa -f $rootfs/etc/ssh/ssh_host_dsa_key |
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| 68 | |
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| 69 | # by default setup root password with no password |
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| 70 | cat <<EOF > $rootfs/etc/ssh/sshd_config |
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| 71 | Port 22 |
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| 72 | Protocol 2 |
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| 73 | HostKey /etc/ssh/ssh_host_rsa_key |
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| 74 | HostKey /etc/ssh/ssh_host_dsa_key |
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| 75 | UsePrivilegeSeparation yes |
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| 76 | KeyRegenerationInterval 3600 |
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| 77 | ServerKeyBits 768 |
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| 78 | SyslogFacility AUTH |
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| 79 | LogLevel INFO |
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| 80 | LoginGraceTime 120 |
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| 81 | PermitRootLogin yes |
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| 82 | StrictModes yes |
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| 83 | RSAAuthentication yes |
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| 84 | PubkeyAuthentication yes |
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| 85 | IgnoreRhosts yes |
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| 86 | RhostsRSAAuthentication no |
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| 87 | HostbasedAuthentication no |
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| 88 | PermitEmptyPasswords yes |
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| 89 | ChallengeResponseAuthentication no |
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| 90 | EOF |
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| 91 | |
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| 92 | if [ -n "$auth_key" -a -f "$auth_key" ]; then |
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| 93 | u_path="/root/.ssh" |
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| 94 | root_u_path="$rootfs/$u_path" |
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| 95 | mkdir -p $root_u_path |
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| 96 | cp $auth_key "$root_u_path/authorized_keys" |
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| 97 | chown -R 0:0 "$rootfs/$u_path" |
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| 98 | chmod 700 "$rootfs/$u_path" |
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| 99 | |
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| 100 | echo "Inserted SSH public key from $auth_key into /home/ubuntu/.ssh/authorized_keys" |
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| 101 | fi |
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| 102 | |
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| 103 | return 0 |
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| 104 | } |
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| 105 | |
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| 106 | copy_configuration() |
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| 107 | { |
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| 108 | path=$1 |
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| 109 | rootfs=$2 |
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| 110 | name=$3 |
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| 111 | |
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| 112 | cat <<EOF >> $path/config |
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| 113 | lxc.utsname = $name |
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| 114 | lxc.pts = 1024 |
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| 115 | lxc.rootfs = $rootfs |
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| 116 | # uncomment the next line to run the container unconfined: |
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| 117 | #lxc.aa_profile = unconfined |
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| 118 | lxc.mount.entry=/dev dev none ro,bind 0 0 |
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| 119 | lxc.mount.entry=/lib lib none ro,bind 0 0 |
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| 120 | lxc.mount.entry=/bin bin none ro,bind 0 0 |
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| 121 | lxc.mount.entry=/usr usr none ro,bind 0 0 |
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| 122 | lxc.mount.entry=/sbin sbin none ro,bind 0 0 |
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| 123 | lxc.mount.entry=tmpfs var/run/sshd tmpfs mode=0644 0 0 |
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| 124 | lxc.mount.entry=/usr/lib/lxc/templates/lxc-sshd sbin/init none bind 0 0 |
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| 125 | lxc.mount.entry=proc proc proc nodev,noexec,nosuid 0 0 |
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| 126 | EOF |
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| 127 | |
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| 128 | # if no .ipv4 section in config, then have the container run dhcp |
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| 129 | grep -q "^lxc.network.ipv4" $path/config || touch $rootfs/run-dhcp |
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| 130 | |
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| 131 | if [ "$(uname -m)" = "x86_64" ]; then |
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| 132 | cat <<EOF >> $path/config |
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| 133 | lxc.mount.entry=/lib64 lib64 none ro,bind 0 0 |
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| 134 | EOF |
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| 135 | fi |
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| 136 | } |
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| 137 | |
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| 138 | usage() |
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| 139 | { |
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| 140 | cat <<EOF |
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| 141 | $1 -h|--help -p|--path=<path> |
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| 142 | EOF |
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| 143 | return 0 |
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| 144 | } |
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| 145 | |
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| 146 | options=$(getopt -o hp:n:S: -l help,path:,name:,auth-key: -- "$@") |
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| 147 | if [ $? -ne 0 ]; then |
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| 148 | usage $(basename $0) |
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| 149 | exit 1 |
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| 150 | fi |
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| 151 | eval set -- "$options" |
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| 152 | |
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| 153 | while true |
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| 154 | do |
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| 155 | case "$1" in |
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| 156 | -h|--help) usage $0 && exit 0;; |
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| 157 | -p|--path) path=$2; shift 2;; |
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| 158 | -n|--name) name=$2; shift 2;; |
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| 159 | -S|--auth-key) auth_key=$2; shift 2;; |
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| 160 | --) shift 1; break ;; |
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| 161 | *) break ;; |
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| 162 | esac |
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| 163 | done |
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| 164 | |
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| 165 | if [ "$(id -u)" != "0" ]; then |
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| 166 | echo "This script should be run as 'root'" |
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| 167 | exit 1 |
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| 168 | fi |
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| 169 | |
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| 170 | if [ $0 == "/sbin/init" ]; then |
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| 171 | |
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| 172 | type /usr/lib/lxc/lxc-init |
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| 173 | if [ $? -ne 0 ]; then |
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| 174 | echo "'lxc-init is not accessible on the system" |
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| 175 | exit 1 |
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| 176 | fi |
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| 177 | |
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| 178 | type sshd |
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| 179 | if [ $? -ne 0 ]; then |
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| 180 | echo "'sshd' is not accessible on the system " |
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| 181 | exit 1 |
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| 182 | fi |
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| 183 | |
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| 184 | # run dhcp? |
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| 185 | if [ -f /run-dhcp ]; then |
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| 186 | type dhclient |
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| 187 | if [ $? -ne 0 ]; then |
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| 188 | echo "can't find dhclient" |
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| 189 | exit 1 |
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| 190 | fi |
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| 191 | touch /etc/fstab |
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| 192 | rm -f /dhclient.conf |
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| 193 | cat > /dhclient.conf << EOF |
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| 194 | send host-name "<hostname>"; |
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| 195 | EOF |
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| 196 | ifconfig eth0 up |
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| 197 | dhclient eth0 -cf /dhclient.conf |
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| 198 | fi |
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| 199 | |
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| 200 | exec /usr/lib/lxc/lxc-init -- /usr/sbin/sshd |
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| 201 | exit 1 |
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| 202 | fi |
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| 203 | |
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| 204 | if [ -z "$path" ]; then |
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| 205 | echo "'path' parameter is required" |
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| 206 | exit 1 |
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| 207 | fi |
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| 208 | |
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| 209 | rootfs=$path/rootfs |
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| 210 | |
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| 211 | install_sshd $rootfs |
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| 212 | if [ $? -ne 0 ]; then |
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| 213 | echo "failed to install sshd's rootfs" |
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| 214 | exit 1 |
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| 215 | fi |
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| 216 | |
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| 217 | configure_sshd $rootfs |
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| 218 | if [ $? -ne 0 ]; then |
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| 219 | echo "failed to configure sshd template" |
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| 220 | exit 1 |
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| 221 | fi |
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| 222 | |
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| 223 | copy_configuration $path $rootfs $name |
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| 224 | if [ $? -ne 0 ]; then |
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| 225 | echo "failed to write configuration file" |
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| 226 | exit 1 |
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| 227 | fi |
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