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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