#!/bin/bash # # lxc: linux Container library # Authors: # Daniel Lezcano # Template for slackware by Matteo Bernardini # some parts are taken from the debian one (used as model) # 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # Detect use under userns (unsupported) for arg in "$@"; do [ "$arg" = "--" ] && break if [ "$arg" = "--mapped-uid" -o "$arg" = "--mapped-gid" ]; then echo "This template can't be used for unprivileged containers." 1>&2 echo "You may want to try the \"download\" template instead." 1>&2 exit 1 fi done # Add some directories to PATH in case we create containers with sudo export PATH=/sbin:/usr/sbin:$PATH cache=${cache:-/var/cache/lxc/slackware} # Use the primary Slackware site by default, but please consider changing # this to a closer mirror site. MIRROR=${MIRROR:-http://ftp.slackware.com/pub/slackware} if [ -z "$arch" ]; then case "$( uname -m )" in i?86) arch=i486 ;; arm*) arch=arm ;; *) arch=$( uname -m ) ;; esac fi LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@" configure_slackware() { rootfs=$1 hostname=$2 echo "Configuring..." ; echo # The next part contains excerpts taken from SeTconfig (written by # Patrick Volkerding) from the slackware setup disk. # But before pasting them just set a variable to use them as they are T_PX=$rootfs ( cd $T_PX ; chmod 755 ./ ) ( cd $T_PX ; chmod 755 ./var ) if [ -d $T_PX/usr/src/linux ]; then chmod 755 $T_PX/usr/src/linux fi if [ ! -d $T_PX/proc ]; then mkdir $T_PX/proc chown root.root $T_PX/proc fi if [ ! -d $T_PX/sys ]; then mkdir $T_PX/sys chown root.root $T_PX/sys fi chmod 1777 $T_PX/tmp if [ ! -d $T_PX/var/spool/mail ]; then mkdir -p $T_PX/var/spool/mail chmod 755 $T_PX/var/spool chown root.mail $T_PX/var/spool/mail chmod 1777 $T_PX/var/spool/mail fi echo "#!/bin/sh" > $T_PX/etc/rc.d/rc.keymap echo "# Load the keyboard map. More maps are in /usr/share/kbd/keymaps." \ >> $T_PX/etc/rc.d/rc.keymap echo "if [ -x /usr/bin/loadkeys ]; then" >> $T_PX/etc/rc.d/rc.keymap echo " /usr/bin/loadkeys us" >> $T_PX/etc/rc.d/rc.keymap echo "fi" >> $T_PX/etc/rc.d/rc.keymap chmod 755 $T_PX/etc/rc.d/rc.keymap # Network configuration is left to the user, that have to edit # /etc/rc.d/rc.inet1.conf and /etc/resolv.conf of the container # just set the hostname cat < $rootfs/etc/HOSTNAME $hostname.example.net EOF cp $rootfs/etc/HOSTNAME $rootfs/etc/hostname # make needed devices, from Chris Willing's MAKEDEV.sh # http://www.vislab.uq.edu.au/howto/lxc/MAKEDEV.sh DEV=$rootfs/dev mkdir -p ${DEV} mknod -m 666 ${DEV}/null c 1 3 mknod -m 666 ${DEV}/zero c 1 5 mknod -m 666 ${DEV}/random c 1 8 mknod -m 666 ${DEV}/urandom c 1 9 mkdir -m 755 ${DEV}/pts mkdir -m 1777 ${DEV}/shm mknod -m 666 ${DEV}/tty c 5 0 mknod -m 600 ${DEV}/console c 5 1 mknod -m 666 ${DEV}/tty0 c 4 0 mknod -m 666 ${DEV}/tty1 c 4 1 mknod -m 666 ${DEV}/tty2 c 4 2 mknod -m 666 ${DEV}/tty3 c 4 3 mknod -m 666 ${DEV}/tty4 c 4 4 mknod -m 666 ${DEV}/tty5 c 4 5 mknod -m 666 ${DEV}/full c 1 7 mknod -m 600 ${DEV}/initctl p mknod -m 660 ${DEV}/loop0 b 7 0 mknod -m 660 ${DEV}/loop1 b 7 1 ln -s pts/ptmx ${DEV}/ptmx ln -s /proc/self/fd ${DEV}/fd echo "Adding an etc/fstab" cat >$rootfs/etc/fstab <$rootfs/tmp/rcs.patch <<'EOF' --- ./etc/rc.orig/rc.6 2012-08-15 01:03:12.000000000 +0200 +++ ./etc/rc.d/rc.6 2013-02-17 10:26:30.888839354 +0100 @@ -9,6 +9,12 @@ # Author: Miquel van Smoorenburg # Modified by: Patrick J. Volkerding, # +# minor tweaks for an lxc container +# by Matteo Bernardini , +# based also on Chris Willing's modifications +# http://www.vislab.uq.edu.au/howto/lxc/rc.6 +# a check for a container variable is made to jump sections +container="lxc" # Set the path. PATH=/sbin:/etc:/bin:/usr/bin @@ -37,6 +43,9 @@ ;; esac +# lxc container check +if [ ! $container = "lxc" ]; then + # Save the system time to the hardware clock using hwclock --systohc. if [ -x /sbin/hwclock ]; then # Check for a broken motherboard RTC clock (where ioports for rtc are @@ -53,6 +62,8 @@ fi fi +fi # end container check + # Run any local shutdown scripts: if [ -x /etc/rc.d/rc.local_shutdown ]; then /etc/rc.d/rc.local_shutdown stop @@ -148,6 +159,9 @@ sleep 2 fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Shut down PCMCIA devices: if [ -x /etc/rc.d/rc.pcmcia ]; then . /etc/rc.d/rc.pcmcia stop @@ -155,11 +169,16 @@ /bin/sleep 5 fi +fi # end container check + # Turn off process accounting: if [ -x /sbin/accton -a -r /var/log/pacct ]; then /sbin/accton off fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Terminate acpid before syslog: if [ -x /etc/rc.d/rc.acpid -a -r /var/run/acpid.pid ]; then # quit . /etc/rc.d/rc.acpid stop @@ -170,6 +189,8 @@ sh /etc/rc.d/rc.udev force-stop fi +fi # end container check + # Kill all remaining processes. if [ ! "$1" = "fast" ]; then echo "Sending all processes the SIGTERM signal." @@ -179,6 +200,9 @@ /sbin/killall5 -9 fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Try to turn off quota. if /bin/grep -q quota /etc/fstab ; then if [ -x /sbin/quotaoff ]; then @@ -187,6 +211,8 @@ fi fi +fi # end container check + # Carry a random seed between reboots. echo "Saving random seed from /dev/urandom in /etc/random-seed." # Use the pool size from /proc, or 512 bytes: @@ -205,6 +231,9 @@ rm -f /var/lock/subsys/* fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Turn off swap: echo "Turning off swap." /sbin/swapoff -a @@ -216,6 +245,8 @@ echo "Remounting root filesystem read-only." /bin/mount -v -n -o remount,ro / +fi # end container check + # This never hurts: /bin/sync @@ -240,12 +271,17 @@ done fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Deactivate LVM volume groups: if [ -r /etc/lvmtab -o -d /etc/lvm/backup ]; then echo "Deactivating LVM volume groups:" /sbin/vgchange -an --ignorelockingfailure fi +fi # end container check + # This never hurts again (especially since root-on-LVM always fails # to deactivate the / logical volume... but at least it was # remounted as read-only first) @@ -258,6 +294,9 @@ # This is to ensure all processes have completed on SMP machines: wait +# lxc container check +if [ ! $container = "lxc" ]; then + if [ -x /sbin/genpowerd ]; then # See if this is a powerfail situation: if /bin/egrep -q "FAIL|SCRAM" /etc/upsstatus 2> /dev/null ; then @@ -274,6 +313,13 @@ fi fi +else + +# confirm successful shutdown of the container +echo ; echo "* container stopped. *" ; echo + +fi # end container check + # Now halt (poweroff with APM or ACPI enabled kernels) or reboot. if [ "$command" = "reboot" ]; then echo "Rebooting." --- ./etc/rc.orig/rc.S 2012-09-13 21:38:34.000000000 +0200 +++ ./etc/rc.d/rc.S 2013-02-17 09:39:41.579799641 +0100 @@ -4,9 +4,18 @@ # # Mostly written by: Patrick J. Volkerding, # +# minor tweaks for an lxc container +# by Matteo Bernardini , +# based also on Chris Willing's modifications +# http://www.vislab.uq.edu.au/howto/lxc/rc.S +# a check for a container variable is made to jump sections +container="lxc" PATH=/sbin:/usr/sbin:/bin:/usr/bin +# lxc container check +if [ ! $container = "lxc" ]; then + # Try to mount /proc: /sbin/mount -v proc /proc -n -t proc 2> /dev/null @@ -254,10 +263,27 @@ read junk; fi # Done checking root filesystem +else + # We really don't want to start udev in the container + if [ -f /etc/rc.d/rc.udev ]; then + chmod -x /etc/rc.d/rc.udev + fi + # Alsa won't work + if [ -f /etc/rc.d/rc.alsa ]; then + chmod -x /etc/rc.d/rc.alsa + fi + # This too + if [ -f /etc/rc.d/rc.loop ]; then + chmod -x /etc/rc.d/rc.loop + fi +fi # end container check # Any /etc/mtab that exists here is old, so we start with a new one: /bin/rm -f /etc/mtab{,~,.tmp} && /bin/touch /etc/mtab +# lxc container check +if [ ! $container = "lxc" ]; then + # Add entry for / to /etc/mtab: /sbin/mount -f -w / @@ -337,6 +363,8 @@ # mounted read-write. /sbin/swapon -a 2> /dev/null +fi # end container check + # Clean up some temporary files: rm -f /var/run/* /var/run/*/* /var/run/*/*/* /etc/nologin \ /etc/dhcpc/*.pid /etc/forcefsck /etc/fastboot \ @@ -364,7 +392,7 @@ # if the first line of that file begins with the word 'Linux'. # You are free to modify the rest of the file as you see fit. if [ -x /bin/sed ]; then - /bin/sed -i "{1s/^Linux.*/$(/bin/uname -sr)\./}" /etc/motd + /bin/sed -i "{1s/^Linux.*/$(/bin/uname -sr) lxc container\./}" /etc/motd fi # If there are SystemV init scripts for this runlevel, run them. @@ -372,6 +400,9 @@ . /etc/rc.d/rc.sysvinit fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Run serial port setup script: # CAREFUL! This can make some systems hang if the rc.serial script isn't # set up correctly. If this happens, you may have to edit the file from a @@ -380,6 +411,8 @@ sh /etc/rc.d/rc.serial start fi +fi # end container check + # Carry an entropy pool between reboots to improve randomness. if [ -f /etc/random-seed ]; then echo "Using /etc/random-seed to initialize /dev/urandom." --- ./etc/rc.orig/rc.M 2012-09-25 19:47:07.000000000 +0200 +++ ./etc/rc.d/rc.M 2013-02-17 09:39:41.579799641 +0100 @@ -10,6 +10,10 @@ # Author: Fred N. van Kempen, # Heavily modified by Patrick Volkerding # +# minor tweaks for an lxc container +# by Matteo Bernardini : +# a check for a container variable is made to jump sections +container="lxc" # Tell the viewers what's going to happen. echo "Going multiuser..." @@ -20,6 +24,9 @@ /sbin/ldconfig & fi +# lxc container check +if [ ! $container = "lxc" ]; then + # Screen blanks after 15 minutes idle time, and powers down in one hour # if the kernel supports APM or ACPI power management: /bin/setterm -blank 15 -powersave powerdown -powerdown 60 @@ -33,6 +40,8 @@ /bin/hostname darkstar fi +fi # end container check + # Set the permissions on /var/log/dmesg according to whether the kernel # permits non-root users to access kernel dmesg information: if [ -r /proc/sys/kernel/dmesg_restrict ]; then @@ -135,6 +144,9 @@ chmod 755 / 2> /dev/null chmod 1777 /tmp /var/tmp +# lxc container check +if [ ! $container = "lxc" ]; then + # Start APM or ACPI daemon. # If APM is enabled in the kernel, start apmd: if [ -e /proc/apm ]; then @@ -146,6 +158,8 @@ . /etc/rc.d/rc.acpid start fi +fi # end container check + # Update any existing icon cache files: if find /usr/share/icons 2> /dev/null | grep -q icon-theme.cache ; then for theme_dir in /usr/share/icons/* ; do --- ./etc/rc.orig/rc.inet1 2012-08-05 19:13:27.000000000 +0200 +++ ./etc/rc.d/rc.inet1 2013-02-17 09:39:41.579799641 +0100 @@ -3,6 +3,11 @@ # This script is used to bring up the various network interfaces. # # @(#)/etc/rc.d/rc.inet1 10.2 Sun Jul 24 12:45:56 PDT 2005 (pjv) +# +# minor tweaks for an lxc container +# by Matteo Bernardini : +# a check for a container variable is made to jump sections +container="lxc" ############################ # READ NETWORK CONFIG FILE # @@ -105,6 +110,10 @@ [ "${IFNAME[$i]}" = "${1}" ] && break i=$(($i+1)) done + + # lxc container check + if [ ! $container = "lxc" ]; then + # If the interface is a bridge, then create it first: [ -n "${BRNICS[$i]}" ] && br_open $i # If the interface isn't in the kernel yet (but there's an alias for it in @@ -115,6 +124,9 @@ /sbin/modprobe ${1} fi fi + + fi # end container check + if grep `echo ${1}: | cut -f 1 -d :`: /proc/net/dev 1> /dev/null ; then # interface exists if ! /sbin/ifconfig | grep -w "${1}" 1>/dev/null || \ ! /sbin/ifconfig ${1} | grep -w inet 1> /dev/null ; then # interface not up or not configured EOF ( cd $rootfs ; patch -p1 < tmp/rcs.patch ; rm tmp/rcs.patch ) # restart rc.inet1 to have routing for the loop device echo "/etc/rc.d/rc.inet1 restart" >> $rootfs/etc/rc.d/rc.local # reduce the number of local consoles: two should be enough sed -i '/^c3\|^c4\|^c5\|^c6/s/^/# /' $rootfs/etc/inittab # better not use this in a container sed -i 's/.*genpowerfail.*//' $rootfs/etc/inittab # add a message to rc.local that confirms successful container startup echo "echo ; echo \"* container $name started. *\" ; echo" >> $rootfs/etc/rc.d/rc.local # borrow the time configuration from the local machine cp -a /etc/localtime $rootfs/etc/localtime return 0 } copy_slackware() { rootfs=$1 # make a local copy of the installed filesystem echo -n "Copying rootfs to $rootfs..." mkdir -p $rootfs cp -a $cache/rootfs-$release-$arch/* $rootfs/ || exit 1 # fix fstab with the actual path sed -i "s|$cache/rootfs-$release-$arch|$rootfs|" $rootfs/etc/fstab return 0 } install_slackware() { rootfs=$1 mkdir -p /var/lock/subsys/ ( flock -n -x 9 if [ $? -ne 0 ]; then echo "Cache repository is busy." return 1 fi if [ "$arch" == "x86_64" ]; then PKGMAIN=slackware64 elif [ "$arch" == "arm" ]; then PKGMAIN=slackwarearm else PKGMAIN=slackware fi export CONF=$cache/slackpkg-conf export ROOT=$cache/rootfs-$release-$arch mkdir -p $cache/cache-$release-$arch $cache/rootfs-$release-$arch \ $cache/slackpkg-$release-$arch $CONF/templates echo "$MIRROR/$PKGMAIN-$release/" > $CONF/mirrors touch $CONF/blacklist cat < $CONF/slackpkg.conf # v2.8 ARCH=$arch TEMP=$cache/cache-$release-$arch WORKDIR=$cache/slackpkg-$release-$arch DELALL=off CHECKMD5=on CHECKGPG=on CHECKSIZE=off PRIORITY=( patches %PKGMAIN extra pasture testing ) POSTINST=on ONLY_NEW_DOTNEW=off ONOFF=on DOWNLOAD_ALL=on DIALOG=off BATCH=on DEFAULT_ANSWER=y USE_INCLUDES=on SPINNING=off EOF # thanks to Vincent Batts for this list of packages # (that I modified a little :P) # http://connie.slackware.com/~vbatts/minimal/ cat < $CONF/templates/minimal-lxc.template aaa_base aaa_elflibs aaa_terminfo bash bin bzip2 coreutils dhcpcd dialog diffutils e2fsprogs elvis etc findutils gawk glibc-solibs gnupg grep gzip hostname iputils libunistring logrotate mpfr net-tools network-scripts ncurses openssh openssl-solibs pkgtools procps-ng sed shadow sharutils slackpkg sysklogd sysvinit sysvinit-functions sysvinit-scripts tar udev util-linux wget which xz EOF TEMPLATE=${TEMPLATE:-minimal-lxc} if [ ! "$TEMPLATE" = "minimal-lxc" ]; then if [ -f /etc/slackpkg/templates/$TEMPLATE.template ]; then cat /etc/slackpkg/templates/$TEMPLATE.template \ > $CONF/templates/$TEMPLATE.template else TEMPLATE="minimal-lxc" fi fi # clean previous installs rm -fR $ROOT/* slackpkg -default_answer=n update slackpkg install-template $TEMPLATE # add a slackpkg default mirror echo "$MIRROR/$PKGMAIN-$release/" >> $ROOT/etc/slackpkg/mirrors # blacklist the devs package (we have to use our premade devices). # do the same with the kernel packages (we use the host's one), # but leave available headers and sources echo "devs" >> $ROOT/etc/slackpkg/blacklist sed -i \ -e "s|^#kernel-|kernel-|" \ -e "s|^kernel-headers|#kernel-headers|" \ -e "s|^kernel-source|#kernel-source|" \ $ROOT/etc/slackpkg/blacklist # force klog to use the system call interface to the kernel message # buffers - needed for unprivileged containers sed -i 's|3\ \-x|3 -x -s|' $ROOT/etc/rc.d/rc.syslog || true return 0 ) 9>/var/lock/subsys/lxc return $? } copy_configuration() { path=$1 rootfs=$2 name=$3 cat <> $path/config lxc.uts.name = $name lxc.arch = $arch lxc.mount.fstab = $rootfs/etc/fstab lxc.include = ${LXC_TEMPLATE_CONFIG}/slackware.common.conf EOF if [ $? -ne 0 ]; then echo "Failed to add configuration." return 1 fi return 0 } clean() { if [ ! -e $cache ]; then exit 0 fi # lock, so we won't purge while someone is creating a repository ( flock -n -x 9 if [ $? != 0 ]; then echo "Cache repository is busy." exit 1 fi echo -n "Purging the download cache..." rm --preserve-root --one-file-system -rf $cache && echo "Done." || exit 1 exit 0 ) 9>/var/lock/subsys/lxc } usage() { cat < --clean EOF return 0 } options=$(getopt -o hp:n:a:r:c -l help,rootfs:,path:,name:,arch:,release:,clean -- "$@") 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;; -a|--arch) arch=$2; shift 2;; -r|--release) release=$2; shift 2;; -n|--name) name=$2; shift 2;; -c|--clean) clean=$2; shift 2;; --) shift 1; break ;; *) break ;; esac done if [ ! -z "$clean" -a -z "$path" ]; then clean || exit 1 exit 0 fi type installpkg if [ $? -ne 0 ]; then echo "'installpkg' command is missing." exit 1 fi type slackpkg if [ $? -ne 0 ]; then echo "'slackpkg' command is missing." exit 1 fi if [ -z "$path" ]; then echo "'path' parameter is required." exit 1 fi if [ "$(id -u)" != "0" ]; then echo "This script should be run as 'root'." exit 1 fi # If no release version was specified, use current release=${release:-current} if [ -z "$name" ]; then # no name given? set a default one name=slackwarecontainer fi # detect rootfs config="$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 echo set -e install_slackware $rootfs if [ $? -ne 0 ]; then echo "Failed to install slackware." exit 1 fi echo configure_slackware $cache/rootfs-$release-$arch $name if [ $? -ne 0 ]; then echo "Failed to configure slackware for a container." exit 1 fi echo rootfs=$path/rootfs copy_slackware $rootfs if [ $? -ne 0 ]; then echo "Failed to copy rootfs." exit 1 fi echo copy_configuration $path $rootfs $name if [ $? -ne 0 ]; then echo "Failed to write configuration file." exit 1 fi if [ ! -z $clean ]; then clean || exit 1 exit 0 fi