forked from neil/lxc-templates
Drop busybox (still in main repo)
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
This commit is contained in:
Stéphane Graber
parent
711ed73634
commit
cb2e0841e6
@ -190,7 +190,6 @@ AC_CONFIG_FILES([
|
||||
templates/lxc-alpine
|
||||
templates/lxc-altlinux
|
||||
templates/lxc-archlinux
|
||||
templates/lxc-busybox
|
||||
templates/lxc-centos
|
||||
templates/lxc-cirros
|
||||
templates/lxc-debian
|
||||
|
||||
@ -4,7 +4,6 @@ templates_SCRIPTS = \
|
||||
lxc-alpine \
|
||||
lxc-altlinux \
|
||||
lxc-archlinux \
|
||||
lxc-busybox \
|
||||
lxc-centos \
|
||||
lxc-cirros \
|
||||
lxc-debian \
|
||||
|
||||
@ -1,484 +0,0 @@
|
||||
#!/bin/bash
|
||||
|
||||
#
|
||||
# lxc: linux Container library
|
||||
|
||||
# Authors:
|
||||
# Daniel Lezcano <daniel.lezcano@free.fr>
|
||||
|
||||
# This library is free software; you can redistribute it and/or
|
||||
# modify it under the terms of the GNU Lesser General Public
|
||||
# License as published by the Free Software Foundation; either
|
||||
# version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
# This library is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
# Lesser General Public License for more details.
|
||||
|
||||
# You should have received a copy of the GNU Lesser General Public
|
||||
# License along with this library; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
|
||||
LXC_MAPPED_UID=
|
||||
LXC_MAPPED_GID=
|
||||
SSH=
|
||||
|
||||
# Make sure the usual locations are in PATH
|
||||
export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
|
||||
|
||||
am_in_userns() {
|
||||
[ -e /proc/self/uid_map ] || { echo no; return; }
|
||||
[ "$(wc -l /proc/self/uid_map | awk '{ print $1 }')" -eq 1 ] || { echo yes; return; }
|
||||
line=$(awk '{ print $1 " " $2 " " $3 }' /proc/self/uid_map)
|
||||
[ "$line" = "0 0 4294967295" ] && { echo no; return; }
|
||||
echo yes
|
||||
}
|
||||
|
||||
in_userns=0
|
||||
[ $(am_in_userns) = "yes" ] && in_userns=1
|
||||
|
||||
copy_binary()
|
||||
{
|
||||
binary_path=`which $1`
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Unable to find $1 binary on the system"
|
||||
return 1
|
||||
fi
|
||||
|
||||
dir_path="${binary_path%/*}"
|
||||
echo /{,usr/}{,s}bin | grep $dir_path >/dev/null 2>&1
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Binary $1 is located at $binary_path and will not be copied"
|
||||
echo "($dir_path not supported)"
|
||||
return 1
|
||||
fi
|
||||
|
||||
cp $binary_path $rootfs/$binary_path
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Failed to copy $binary_path to rootfs"
|
||||
return 1
|
||||
fi
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
install_busybox()
|
||||
{
|
||||
rootfs=$1
|
||||
name=$2
|
||||
res=0
|
||||
tree="\
|
||||
$rootfs/selinux \
|
||||
$rootfs/dev \
|
||||
$rootfs/home \
|
||||
$rootfs/root \
|
||||
$rootfs/etc \
|
||||
$rootfs/etc/init.d \
|
||||
$rootfs/bin \
|
||||
$rootfs/usr/bin \
|
||||
$rootfs/sbin \
|
||||
$rootfs/usr/sbin \
|
||||
$rootfs/proc \
|
||||
$rootfs/sys \
|
||||
$rootfs/mnt \
|
||||
$rootfs/tmp \
|
||||
$rootfs/var/log \
|
||||
$rootfs/usr/share/udhcpc \
|
||||
$rootfs/dev/pts \
|
||||
$rootfs/dev/shm \
|
||||
$rootfs/lib \
|
||||
$rootfs/usr/lib \
|
||||
$rootfs/lib64 \
|
||||
$rootfs/usr/lib64"
|
||||
|
||||
mkdir -p $tree || return 1
|
||||
chmod 755 $tree || return 1
|
||||
|
||||
pushd $rootfs/dev > /dev/null || return 1
|
||||
|
||||
# minimal devices needed for busybox
|
||||
if [ $in_userns -eq 1 ]; then
|
||||
for dev in tty console tty0 tty1 ram0 null urandom; do
|
||||
echo "lxc.mount.entry = /dev/$dev dev/$dev none bind,optional,create=file 0 0" >> $path/config
|
||||
done
|
||||
else
|
||||
mknod -m 666 tty c 5 0 || res=1
|
||||
mknod -m 666 console c 5 1 || res=1
|
||||
mknod -m 666 tty0 c 4 0 || res=1
|
||||
mknod -m 666 tty1 c 4 0 || res=1
|
||||
mknod -m 666 tty5 c 4 0 || res=1
|
||||
mknod -m 600 ram0 b 1 0 || res=1
|
||||
mknod -m 666 null c 1 3 || res=1
|
||||
mknod -m 666 zero c 1 5 || res=1
|
||||
mknod -m 666 urandom c 1 9 || res=1
|
||||
fi
|
||||
|
||||
popd > /dev/null
|
||||
|
||||
# root user defined
|
||||
cat <<EOF >> $rootfs/etc/passwd
|
||||
root:x:0:0:root:/root:/bin/sh
|
||||
EOF
|
||||
|
||||
cat <<EOF >> $rootfs/etc/group
|
||||
root:x:0:root
|
||||
EOF
|
||||
|
||||
# mount everything
|
||||
cat <<EOF >> $rootfs/etc/init.d/rcS
|
||||
#!/bin/sh
|
||||
/bin/syslogd
|
||||
/bin/mount -a
|
||||
/bin/udhcpc
|
||||
EOF
|
||||
|
||||
# executable
|
||||
chmod 744 $rootfs/etc/init.d/rcS || return 1
|
||||
|
||||
# launch rcS first then make a console available
|
||||
# and propose a shell on the tty, the last one is
|
||||
# not needed
|
||||
cat <<EOF >> $rootfs/etc/inittab
|
||||
::sysinit:/etc/init.d/rcS
|
||||
tty1::respawn:/bin/getty -L tty1 115200 vt100
|
||||
console::askfirst:/bin/sh
|
||||
EOF
|
||||
# writable and readable for other
|
||||
chmod 644 $rootfs/etc/inittab || return 1
|
||||
|
||||
cat <<EOF >> $rootfs/usr/share/udhcpc/default.script
|
||||
#!/bin/sh
|
||||
case "\$1" in
|
||||
deconfig)
|
||||
ip addr flush dev \$interface
|
||||
;;
|
||||
|
||||
renew|bound)
|
||||
# flush all the routes
|
||||
if [ -n "\$router" ]; then
|
||||
ip route del default 2> /dev/null
|
||||
fi
|
||||
|
||||
# check broadcast
|
||||
if [ -n "\$broadcast" ]; then
|
||||
broadcast="broadcast \$broadcast"
|
||||
fi
|
||||
|
||||
# add a new ip address
|
||||
ip addr add \$ip/\$mask \$broadcast dev \$interface
|
||||
|
||||
if [ -n "\$router" ]; then
|
||||
ip route add default via \$router dev \$interface
|
||||
fi
|
||||
|
||||
[ -n "\$domain" ] && echo search \$domain > /etc/resolv.conf
|
||||
for i in \$dns ; do
|
||||
echo nameserver \$i >> /etc/resolv.conf
|
||||
done
|
||||
;;
|
||||
esac
|
||||
exit 0
|
||||
EOF
|
||||
|
||||
chmod 744 $rootfs/usr/share/udhcpc/default.script
|
||||
|
||||
return $res
|
||||
}
|
||||
|
||||
install_dropbear()
|
||||
{
|
||||
# copy dropbear binary
|
||||
copy_binary dropbear || return 1
|
||||
|
||||
# make symlinks to various ssh utilities
|
||||
utils="\
|
||||
$rootfs/usr/bin/dbclient \
|
||||
$rootfs/usr/bin/scp \
|
||||
$rootfs/usr/bin/ssh \
|
||||
$rootfs/usr/sbin/dropbearkey \
|
||||
$rootfs/usr/sbin/dropbearconvert \
|
||||
"
|
||||
echo $utils | xargs -n1 ln -s /usr/sbin/dropbear
|
||||
|
||||
# add necessary config files
|
||||
mkdir $rootfs/etc/dropbear
|
||||
dropbearkey -t rsa -f $rootfs/etc/dropbear/dropbear_rsa_host_key > /dev/null 2>&1
|
||||
dropbearkey -t dss -f $rootfs/etc/dropbear/dropbear_dss_host_key > /dev/null 2>&1
|
||||
|
||||
echo "'dropbear' ssh utility installed"
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
install_openssh()
|
||||
{
|
||||
# tools to be installed
|
||||
server_utils="sshd"
|
||||
client_utils="\
|
||||
ssh \
|
||||
scp \
|
||||
"
|
||||
client_optional_utils="\
|
||||
sftp \
|
||||
ssh-add \
|
||||
ssh-agent \
|
||||
ssh-keygen \
|
||||
ssh-keyscan \
|
||||
ssh-argv0 \
|
||||
ssh-copy-id \
|
||||
"
|
||||
|
||||
# new folders used by ssh
|
||||
ssh_tree="\
|
||||
$rootfs/etc/ssh \
|
||||
$rootfs/var/empty/sshd \
|
||||
$rootfs/var/lib/empty/sshd \
|
||||
$rootfs/var/run/sshd \
|
||||
"
|
||||
|
||||
# create folder structure
|
||||
mkdir -p $ssh_tree
|
||||
if [ $? -ne 0 ]; then
|
||||
return 1
|
||||
fi
|
||||
|
||||
# copy binaries
|
||||
for bin in $server_utils $client_utils; do
|
||||
copy_binary $bin || return 1
|
||||
done
|
||||
|
||||
for bin in $client_optional_utils; do
|
||||
tool_path=`which $bin` && copy_binary $bin
|
||||
done
|
||||
|
||||
# add user and group
|
||||
cat <<EOF >> $rootfs/etc/passwd
|
||||
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
|
||||
EOF
|
||||
|
||||
cat <<EOF >> $rootfs/etc/group
|
||||
sshd:x:74:
|
||||
EOF
|
||||
|
||||
# generate container keys
|
||||
ssh-keygen -t rsa -N "" -f $rootfs/etc/ssh/ssh_host_rsa_key >/dev/null 2>&1
|
||||
ssh-keygen -t dsa -N "" -f $rootfs/etc/ssh/ssh_host_dsa_key >/dev/null 2>&1
|
||||
|
||||
# by default setup root password with no password
|
||||
cat <<EOF > $rootfs/etc/ssh/sshd_config
|
||||
Port 22
|
||||
Protocol 2
|
||||
HostKey /etc/ssh/ssh_host_rsa_key
|
||||
HostKey /etc/ssh/ssh_host_dsa_key
|
||||
UsePrivilegeSeparation yes
|
||||
KeyRegenerationInterval 3600
|
||||
ServerKeyBits 768
|
||||
SyslogFacility AUTH
|
||||
LogLevel INFO
|
||||
LoginGraceTime 120
|
||||
PermitRootLogin yes
|
||||
StrictModes yes
|
||||
RSAAuthentication yes
|
||||
PubkeyAuthentication yes
|
||||
IgnoreRhosts yes
|
||||
RhostsRSAAuthentication no
|
||||
HostbasedAuthentication no
|
||||
PermitEmptyPasswords yes
|
||||
ChallengeResponseAuthentication no
|
||||
EOF
|
||||
|
||||
echo "'OpenSSH' utility installed"
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
configure_busybox()
|
||||
{
|
||||
rootfs=$1
|
||||
|
||||
which busybox >/dev/null 2>&1
|
||||
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "busybox executable is not accessible"
|
||||
return 1
|
||||
fi
|
||||
|
||||
# copy busybox in the rootfs
|
||||
cp $(which busybox) $rootfs/bin
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to copy busybox in the rootfs"
|
||||
return 1
|
||||
fi
|
||||
|
||||
# symlink busybox for the commands it supports
|
||||
# it would be nice to just use "chroot $rootfs busybox --install -s /bin"
|
||||
# but that only works right in a chroot with busybox >= 1.19.0
|
||||
pushd $rootfs/bin > /dev/null || return 1
|
||||
./busybox --help | grep 'Currently defined functions:' -A300 | \
|
||||
grep -v 'Currently defined functions:' | tr , '\n' | \
|
||||
xargs -n1 ln -s busybox
|
||||
popd > /dev/null
|
||||
|
||||
# relink /sbin/init
|
||||
ln $rootfs/bin/busybox $rootfs/sbin/init
|
||||
|
||||
# /etc/fstab must exist for "mount -a"
|
||||
touch $rootfs/etc/fstab
|
||||
|
||||
# passwd exec must be setuid
|
||||
chmod +s $rootfs/bin/passwd
|
||||
touch $rootfs/etc/shadow
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
copy_configuration()
|
||||
{
|
||||
path=$1
|
||||
rootfs=$2
|
||||
name=$3
|
||||
|
||||
grep -q "^lxc.rootfs.path" $path/config 2>/dev/null || echo "lxc.rootfs.path = $rootfs" >> $path/config
|
||||
cat <<EOF >> $path/config
|
||||
lxc.signal.halt = SIGUSR1
|
||||
lxc.signal.reboot = SIGTERM
|
||||
lxc.uts.name = $name
|
||||
lxc.tty.max = 1
|
||||
lxc.pty.max = 1
|
||||
lxc.cap.drop = sys_module mac_admin mac_override sys_time
|
||||
|
||||
# When using LXC with apparmor, uncomment the next line to run unconfined:
|
||||
#lxc.apparmor.profile = unconfined
|
||||
|
||||
lxc.mount.auto = cgroup:mixed proc:mixed sys:mixed
|
||||
lxc.mount.entry = shm /dev/shm tmpfs defaults 0 0
|
||||
EOF
|
||||
|
||||
libdirs="\
|
||||
lib \
|
||||
usr/lib \
|
||||
lib64 \
|
||||
usr/lib64"
|
||||
|
||||
for dir in $libdirs; do
|
||||
if [ -d "/$dir" ] && [ -d "$rootfs/$dir" ]; then
|
||||
echo "lxc.mount.entry = /$dir $dir none ro,bind 0 0" >> $path/config
|
||||
fi
|
||||
done
|
||||
echo "lxc.mount.entry = /sys/kernel/security sys/kernel/security none ro,bind,optional 0 0" >>$path/config
|
||||
}
|
||||
|
||||
remap_userns()
|
||||
{
|
||||
path=$1
|
||||
|
||||
if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
|
||||
chown $LXC_MAPPED_UID $path/config >/dev/null 2>&1
|
||||
chown -R root $path/rootfs >/dev/null 2>&1
|
||||
fi
|
||||
|
||||
if [ -n "$LXC_MAPPED_GID" ] && [ "$LXC_MAPPED_GID" != "-1" ]; then
|
||||
chgrp $LXC_MAPPED_GID $path/config >/dev/null 2>&1
|
||||
chgrp -R root $path/rootfs >/dev/null 2>&1
|
||||
fi
|
||||
}
|
||||
|
||||
usage()
|
||||
{
|
||||
cat <<EOF
|
||||
$1 -h|--help -p|--path=<path> -s|--ssh={dropbear,openssh}
|
||||
EOF
|
||||
return 0
|
||||
}
|
||||
|
||||
options=$(getopt -o hp:n:s: -l help,rootfs:,path:,name:,mapped-uid:,mapped-gid:,ssh: -- "$@")
|
||||
if [ $? -ne 0 ]; then
|
||||
usage $(basename $0)
|
||||
exit 1
|
||||
fi
|
||||
eval set -- "$options"
|
||||
|
||||
while true
|
||||
do
|
||||
case "$1" in
|
||||
-h|--help) usage $0 && exit 0;;
|
||||
-p|--path) path=$2; shift 2;;
|
||||
--rootfs) rootfs=$2; shift 2;;
|
||||
-n|--name) name=$2; shift 2;;
|
||||
--mapped-uid) LXC_MAPPED_UID=$2; shift 2;;
|
||||
--mapped-gid) LXC_MAPPED_GID=$2; shift 2;;
|
||||
-s|--ssh) SSH=$2; shift 2;;
|
||||
--) shift 1; break ;;
|
||||
*) break ;;
|
||||
esac
|
||||
done
|
||||
|
||||
if [ "$(id -u)" != "0" ]; then
|
||||
echo "This script should be run as 'root'"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ -z "$path" ]; then
|
||||
echo "'path' parameter is required"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# detect rootfs
|
||||
config="$path/config"
|
||||
if [ -z "$rootfs" ]; then
|
||||
if grep -q '^lxc.rootfs.path' $config 2>/dev/null ; then
|
||||
rootfs=$(awk -F= '/^lxc.rootfs.path =/{ print $2 }' $config)
|
||||
else
|
||||
rootfs=$path/rootfs
|
||||
fi
|
||||
fi
|
||||
|
||||
install_busybox $rootfs $name
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to install busybox's rootfs"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
configure_busybox $rootfs
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to configure busybox template"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
copy_configuration $path $rootfs $name
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to write configuration file"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
remap_userns $path
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "failed to remap files to user"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ -n "$SSH" ]; then
|
||||
case "$SSH" in
|
||||
"dropbear")
|
||||
install_dropbear
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Unable to install 'dropbear' ssh utility"
|
||||
exit 1
|
||||
fi ;;
|
||||
"openssh")
|
||||
install_openssh
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Unable to install 'OpenSSH' utility"
|
||||
exit 1
|
||||
fi ;;
|
||||
*)
|
||||
echo "$SSH: unrecognized ssh utility"
|
||||
exit 1
|
||||
esac
|
||||
else
|
||||
which dropbear >/dev/null 2>&1
|
||||
if [ $? -eq 0 ]; then
|
||||
install_dropbear
|
||||
fi
|
||||
fi
|
||||
Loading…
Reference in New Issue
Block a user