3 # lxc template for debootstrapping in userns
6 # Brett Parker <iDunno@sommitrealweird.co.uk>
8 # This library is free software; you can redistribute it and/or
9 # modify it under the terms of the GNU Lesser General Public
10 # License as published by the Free Software Foundation; either
11 # version 2.1 of the License, or (at your option) any later version.
13 # This library is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 # Lesser General Public License for more details.
18 # You should have received a copy of the GNU Lesser General Public
19 # License along with this library; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 # Only support usage in userns.
26 [ "$arg" = "--" ] && break
27 if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then
32 if [ "$MAPPED" == "no" ]; then
33 echo "This template can only be used for unprivileged containers." 1>&2
34 echo "You might want the \"debian\" template instead." 1|&2
37 # Make sure the usual locations are in PATH
38 export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
39 export GREP_OPTIONS=""
43 LXC debootstrap in user namespace for unprivileged containers
46 [ -h | --help ]: Print this help message and exit.
49 [ -r | --release <release> ]: The debian release, e.g. jessie or stretch.
52 [ -m | --mirror <mirrorurl> ]: The debian mirror to user
57 options=$(getopt -o r:m:h -l release:,mirror:,help,mapped-uid:,mapped-gid:,name:,path:,rootfs: -- "$@")
64 eval set -- "$options"
66 DEBIAN_MIRROR="http://mirror.mythic-beasts.com/debian/"
67 DEBIAN_RELEASE="jessie"
71 -h|--help) usage && exit 1;;
72 -r|--release) DEBIAN_RELEASE=$2; shift 2;;
73 -m|--mirror) DEBIAN_MIRROR=$2; shift 2;;
74 --mapped-uid) MAPPED_UID=$2; shift 2;;
75 --mapped-gid) MAPPED_GID=$2; shift 2;;
76 --name) LXC_NAME=$2; shift 2;;
77 --path) LXC_PATH=$2; shift 2;;
78 --rootfs) LXC_ROOTFS=$2; shift 2;;
83 echo "Mapped UID: $MAPPED_UID"
84 echo "Mapped GID: $MAPPED_GID"
85 echo "RootFS: $LXC_ROOTFS"
86 echo "Name: $LXC_NAME"
87 echo "Path: $LXC_PATH"
89 # rewrite the default config file
91 sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" ${LXC_PATH}/config
92 sed -i -e '4,$d' ${LXC_PATH}/config
94 cat <<EOF >> ${LXC_PATH}/config
97 lxc.include = /usr/share/lxc/config/debian.common.conf
98 lxc.include = /usr/share/lxc/config/debian.userns.conf
101 lxc.utsname = $LXC_NAME
103 # Automatic configuration
106 # add back in the auto foo
107 cat "${LXC_PATH}/config-auto" >> ${LXC_PATH}/config
108 rm ${LXC_PATH}/config-auto
110 mkdir ${LXC_PATH}/bin
111 cat <<EOF > ${LXC_PATH}/bin/mknod
117 chmod 755 ${LXC_PATH}/bin/mknod
119 export PATH=${LXC_PATH}/bin:$PATH
121 debootstrap --foreign --include debian-archive-keyring,ifupdown,isc-dhcp-client,locales,openssh-server $DEBIAN_RELEASE ${LXC_ROOTFS} $DEBIAN_MIRROR
123 # now totally skip that check in the new root, because it sucks.
124 sed -i -e 's#check_sane_mount () {#check_sane_mount () {\n\treturn 0#;' ${LXC_ROOTFS}/debootstrap/functions
126 # and stop it from bothering to try to setup proc
127 sed -i -e 's#setup_proc () {#setup_proc () {\n\treturn 0#;' ${LXC_ROOTFS}/debootstrap/functions
129 keyring_dpkg=$(sed -ne "/^debian-archive-keyring/ { s#.* ##; p; }" ${LXC_ROOTFS}/debootstrap/debpaths)
130 # and unpack debian-archive-keyring, because we'll need that
131 (cd ${LXC_ROOTFS} && dpkg-deb -x .$keyring_dpkg .)
133 # replace the tar containing devices with something that doesn't contain any
134 (cd $LXC_ROOTFS/debootstrap && rm devices.tar.gz && tar czvf devices.tar.gz --files-from=/dev/null)
136 # and mount a shitload of things for fun and profit...
137 for file in /var/lib/lxcfs/proc/*; do
138 fname=$(basename $file)
139 touch ${LXC_ROOTFS}/proc/$fname
140 mount -n -o bind $file ${LXC_ROOTFS}/proc/$fname
143 for dev in random urandom; do
144 touch ${LXC_ROOTFS}/dev/$dev
145 mount -n -o bind /dev/$dev ${LXC_ROOTFS}/dev/$dev
148 # set /proc/cmdline to something silly
149 echo "debootstrapping - hahaha" > ${LXC_ROOTFS}/proc/cmdline
151 # and disable initscripts
152 cat <<EOF > ${LXC_ROOTFS}/usr/sbin/policy-rc.d
158 # and run the second stage
159 chroot ${LXC_ROOTFS} /debootstrap/debootstrap --second-stage
164 if [ ! -z "$LANG" ]; then
169 cat >> ${LXC_ROOTFS}/etc/locale.gen <<EOF
173 chroot ${LXC_ROOTFS} /usr/sbin/locale-gen $lang $enc
174 chroot ${LXC_ROOTFS} /usr/sbin/update-locale LANG=$LANG
177 if [ -f /etc/timezone ]; then
178 cat /etc/timezone > ${LXC_ROOTFS}/etc/timezone
179 elif [ -f /etc/sysconfig/clock ]; then
180 . /etc/sysconfig/clock
181 echo $ZONE > ${LXC_ROOTFS}/etc/timezone
183 chroot ${LXC_ROOTFS} dpkg-reconfigure -f noninteractive tzdata
186 NETWORK_FILE=/etc/network/interfaces
187 if [ -e ${LXC_ROOTFS}/etc/network/interfaces.d ]; then
188 NETWORK_FILE=/etc/network/interfaces.d/eth0
191 # remove some interesting breakages in pam for unpriv foo
192 sed -i -e 's#^\(session.*required.*pam_loginuid.so\)#\#\1#;' ${LXC_ROOTFS}/etc/pam.d/*
195 echo $LXC_NAME > ${LXC_ROOTFS}/etc/hostname
198 cat <<EOF > ${LXC_ROOTFS}/etc/apt/sources.list
199 deb $DEBIAN_MIRROR $DEBIAN_RELEASE main
200 deb http://security.debian.org/ $DEBIAN_RELEASE/updates main
203 # disable bits of systemd that we hates
204 chroot $LXC_ROOTFS /usr/sbin/update-rc.d -f checkroot.sh disable > /dev/null 2>&1
205 chroot $LXC_ROOTFS /usr/sbin/update-rc.d -f umountfs disable > /dev/null 2>&1
206 chroot $LXC_ROOTFS /usr/sbin/update-rc.d -f hwclock.sh disable > /dev/null 2>&1
207 chroot $LXC_ROOTFS /usr/sbin/update-rc.d -f hwclockfirst.sh disable > /dev/null 2>&1
209 if [ -e ${LXC_ROOTFS}/etc/systemd/system/ ]; then
210 touch ${LXC_ROOTFS}/etc/systemd/system/systemd-setup-dgram-qlen.service
211 touch ${LXC_ROOTFS}/etc/systemd/system/dev-hugepages.mount
212 touch ${LXC_ROOTFS}/etc/systemd/system/udev.service
213 touch ${LXC_ROOTFS}/etc/systemd/system/systemd-udevd.service
214 chroot ${LXC_ROOTFS} systemctl set-default multi-user.target
215 chroot ${LXC_ROOTFS} ln -s /lib/systemd/system/halt.target /etc/systemd/system/sigpwr.target
218 cat <<EOF >> ${LXC_ROOTFS}${NETWORK_FILE}
223 # and update to the latest security
224 chroot ${LXC_ROOTFS} apt-get update
225 chroot ${LXC_ROOTFS} apt-get -y upgrade
227 # if we're all good here, unmount things and clean up
228 [ -e ${LXC_ROOTFS}/usr/sbin/policy-rc.d ] && rm ${LXC_ROOTFS}/usr/sbin/policy-rc.d
229 rm ${LXC_ROOTFS}/proc/cmdline
231 for dev in random urandom; do
232 umount ${LXC_ROOTFS}/dev/$dev
233 rm ${LXC_ROOTFS}/dev/$dev
236 for file in /var/lib/lxcfs/proc/*; do
237 fname=$(basename $file)
238 umount ${LXC_ROOTFS}/proc/$fname
239 rm ${LXC_ROOTFS}/proc/$fname