+++ /dev/null
-#!/bin/sh
-
-#
-# lxc: linux Container library
-
-# Authors:
-# Serge Hallyn <serge.hallyn@ubuntu.com>
-# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-set -e
-
-usage() {
- echo "usage: $(basename $0) -o ORIG_NAME -n NEW_NAME [-s] [-h] [-L FS_SIZE]" >&2
- echo " [-v VG_NAME] [-p LV_PREFIX] [-t FS_TYPE]" >&2
-}
-
-help() {
- usage
- echo >&2
- echo "Clone an existing container on the system." >&2
- echo >&2
- echo "Options:" >&2
- echo " -o ORIG_NAME specify the name of the original container" >&2
- echo " -n NEW_NAME specify the name of the new container" >&2
- echo " -s make the new rootfs a snapshot of the original" >&2
- echo " -L FS_SIZE specify the new filesystem size (default: same as original)" >&2
- echo " -v VG_NAME specify the new LVM volume group name (default: lxc)" >&2
- echo " -p LV_PREFIX add a prefix to new LVM logical volume names" >&2
- echo " -t FS_TYPE specify the new filesystem type (default: ext3;" >&2
- echo " only works for non-snapshot LVM)" >&2
-}
-
-usage_err() {
- [ -n "$1" ] && echo "$1" >&2
- usage
- exit 1
-}
-
-optarg_check() {
- [ -n "$2" ] || usage_err "option $1 requires an argument"
-}
-
-. @DATADIR@/lxc/lxc.functions
-snapshot=no
-lxc_size=_unset
-lxc_vg=lxc
-lxc_lv_prefix=""
-fstype=ext3
-
-while [ $# -gt 0 ]; do
- opt="$1"
- shift
- case "$opt" in
- -h|--help)
- help
- exit 1
- ;;
- -s|--snapshot)
- snapshot=yes
- snapshot_opt="-s"
- ;;
- -o|--orig)
- optarg_check $opt $1
- lxc_orig=$1
- shift
- ;;
- -L|--fssize)
- optarg_check $opt $1
- lxc_size=$1
- shift
- ;;
- -t|--fstype)
- optarg_check $opt $1
- fstype=$1
- shift
- ;;
- -v|--vgname)
- optarg_check $opt $1
- lxc_vg=$1
- shift
- ;;
- -n|--name)
- optarg_check $opt $1
- lxc_new=$1
- shift
- ;;
- -p|--lvprefix)
- optarg_check $opt $1
- lxc_lv_prefix=$1
- shift
- ;;
- --)
- break
- ;;
- -?)
- usage_err "Unknown option: '$opt'"
- ;;
- -*)
- # split opts -abc into -a -b -c
- set -- $(echo "${opt#-}" | sed 's/\(.\)/ -\1/g') "$@"
- ;;
- *)
- usage_err
- ;;
- esac
-done
-
-if [ -z "$lxc_path" ]; then
- echo "$(basename $0): no configuration path defined" >&2
- exit 1
-fi
-
-if [ ! -r $lxc_path ]; then
- echo "$(basename $0): configuration path '$lxc_path' not found" >&2
- exit 1
-fi
-
-if [ -z "$lxc_orig" ]; then
- echo "$(basename $0): no original container name specified" >&2
- usage
- exit 1
-fi
-
-if [ -z "$lxc_new" ]; then
- echo "$(basename $0): no new container name specified" >&2
- usage
- exit 1
-fi
-
-if [ "$(id -u)" != "0" ]; then
- echo "$(basename $0): must be run as root" >&2
- exit 1
-fi
-
-if [ ! -d "$lxc_path/$lxc_orig" ]; then
- echo "$(basename $0): '$lxc_orig' does not exist" >&2
- exit 1
-fi
-
-if [ -d "$lxc_path/$lxc_new" ]; then
- echo "$(basename $0): '$lxc_new' already exists" >&2
- exit 1
-fi
-
-mounted=0
-frozen=0
-oldroot=`grep lxc.rootfs $lxc_path/$lxc_orig/config | awk -F= '{ print $2 '}`
-
-cleanup() {
- if [ -b $oldroot ]; then
- if [ $mounted -eq 1 ]; then
- umount $rootfs || true
- fi
- lvremove -f $rootdev || true
- fi
- ${bindir}/lxc-destroy -n $lxc_new || true
- if [ $frozen -eq 1 ]; then
- lxc-unfreeze -n $lxc_orig
- fi
- echo "$(basename $0): aborted" >&2
- exit 1
-}
-trap cleanup HUP INT TERM
-
-mkdir -p $lxc_path/$lxc_new
-hostname=$lxc_new
-
-echo "Tweaking configuration"
-cp $lxc_path/$lxc_orig/config $lxc_path/$lxc_new/config
-sed -i '/lxc.utsname/d' $lxc_path/$lxc_new/config
-echo "lxc.utsname = $hostname" >> $lxc_path/$lxc_new/config
-
-grep "lxc.mount[ \t]" $lxc_path/$lxc_new/config >/dev/null 2>&1 && { sed -i '/lxc.mount[ \t]/d' $lxc_path/$lxc_new/config; echo "lxc.mount = $lxc_path/$lxc_new/fstab" >> $lxc_path/$lxc_new/config; }
-
-if [ -e $lxc_path/$lxc_orig/fstab ];then
- cp $lxc_path/$lxc_orig/fstab $lxc_path/$lxc_new/fstab
- sed -i "s@$lxc_path/$lxc_orig@$lxc_path/$lxc_new@" $lxc_path/$lxc_new/fstab
-fi
-
-echo "Copying rootfs..."
-oldroot=`grep lxc.rootfs $lxc_path/$lxc_orig/config | awk -F'[= \t]+' '{ print $2 }'`
-rootfs=`echo $oldroot |sed "s/$lxc_orig/$lxc_new/"`
-
-container_running=True
-lxc-info -n $lxc_orig --state-is RUNNING || container_running=False
-
-sed -i '/lxc.rootfs/d' $lxc_path/$lxc_new/config
-if [ -b $oldroot ]; then
- which vgscan >/dev/null 2>&1 || { echo "$(basename $0): lvm is not installed" >&2; false; }
- lvdisplay $oldroot > /dev/null 2>&1 || { echo "$(basename $0): non-lvm blockdev cloning is not supported" >&2; false; }
- lvm=TRUE
- # ok, create a snapshot of the lvm device
- if [ $container_running = "True" ]; then
- lxc-freeze -n $lxc_orig
- frozen=1
- fi
- if [ $lxc_size = "_unset" ]; then
- lxc_size=`lvdisplay $oldroot | grep Size | awk '{ print $3 $4 }'`
- fi
- newlv="${lxc_lv_prefix}${lxc_new}_snapshot"
- lvcreate -s -L $lxc_size -n $newlv $oldroot
- which xfs_admin > /dev/null 2>&1 && {
- # change filesystem UUID if it is an xfs filesystem
- xfs_admin -u /dev/$lxc_vg/$newlv && xfs_admin -U generate /dev/$lxc_vg/$newlv
- }
-
- if [ $container_running = "True" ]; then
- lxc-unfreeze -n $lxc_orig
- frozen=0
- fi
- if [ $snapshot = "no" ]; then
- #mount snapshot
- mkdir -p ${rootfs}_snapshot
- mount /dev/$lxc_vg/${lxc_lv_prefix}${lxc_new}_snapshot ${rootfs}_snapshot || { echo "$(basename $0): failed to mount new rootfs_snapshot" >&2; false; }
- #create a new lv
- lvcreate -L $lxc_size $lxc_vg -n ${lxc_lv_prefix}$lxc_new
- echo "lxc.rootfs = /dev/$lxc_vg/${lxc_lv_prefix}$lxc_new" >> $lxc_path/$lxc_new/config
- # and mount it so we can tweak it
- mkdir -p $rootfs
- mkfs -t $fstype /dev/$lxc_vg/${lxc_lv_prefix}$lxc_new
- mount /dev/$lxc_vg/${lxc_lv_prefix}$lxc_new $rootfs || { echo "$(basename $0): failed to mount new rootfs" >&2; false; }
- mounted=1
- rsync -Hax ${rootfs}_snapshot/ ${rootfs}/ || { echo "$(basename $0): copying data to new lv failed" >&2; false; }
- umount ${rootfs}_snapshot
- rmdir ${rootfs}_snapshot
- lvremove -f $lxc_vg/${lxc_lv_prefix}${lxc_new}_snapshot
- else
- lvrename $lxc_vg/${lxc_lv_prefix}${lxc_new}_snapshot $lxc_vg/${lxc_lv_prefix}$lxc_new
- echo "lxc.rootfs = /dev/$lxc_vg/${lxc_lv_prefix}$lxc_new" >> $lxc_path/$lxc_new/config
- # and mount it so we can tweak it
- mkdir -p $rootfs
- mount /dev/$lxc_vg/${lxc_lv_prefix}$lxc_new $rootfs || { echo "$(basename $0): failed to mount new rootfs" >&2; false; }
- mounted=1
- fi
-
-elif which btrfs >/dev/null 2>&1 && btrfs subvolume list $oldroot >/dev/null 2>&1; then
- # if oldroot is a btrfs subvolume, assume they want a snapshot
- btrfs subvolume snapshot "$oldroot" "$rootfs" 2>&1 || { echo "$(basename $0): btrfs snapshot failed" >&2; false; }
- echo "lxc.rootfs = $rootfs" >> "$lxc_path/$lxc_new/config"
-elif [ -d $lxc_path/$lxc_orig/delta0 ]; then # this is a quasi-ephemeral container
- if [ $container_running = "True" ]; then
- echo "$(basename $0): container $lxc_orig is running." >&2
- cleanup
- fi
- rsync -Hax $lxc_path/$lxc_orig/delta0 $lxc_path/$lxc_new/
- touch $lxc_path/$lxc_new/configured
- cp -f $lxc_path/$lxc_orig/pre-mount $lxc_path/$lxc_new/
- sed -i "s@$lxc_path/$lxc_orig@$lxc_path/$lxc_new@g" $lxc_path/$lxc_new/config
- sed -i "s@$lxc_path/$lxc_orig@$lxc_path/$lxc_new@g" $lxc_path/$lxc_new/pre-mount
- sed -i "s@LXC_NAME=\"$lxc_orig@LXC_NAME=\"$lxc_new@" $lxc_path/$lxc_new/pre-mount
- # lxc-start-ephemeral will have updated /etc/hostname and such under the
- # delta0, so just mounting the delta should suffice.
- mkdir -p $rootfs
- mount --bind $lxc_path/$lxc_new/delta0 $rootfs
- mounted=1
- echo "lxc.rootfs = $rootfs" >> "$lxc_path/$lxc_new/config"
-else
- if [ $snapshot = "yes" ]; then
- echo "$(basename $0): cannot snapshot a directory" >&2
- cleanup
- fi
- if [ $container_running = "True" ]; then
- lxc-freeze -n $lxc_orig
- frozen=1
- fi
- mkdir -p $rootfs/
- rsync -Hax $oldroot/ $rootfs/
- echo "lxc.rootfs = $rootfs" >> $lxc_path/$lxc_new/config
- if [ $container_running = "True" ]; then
- lxc-unfreeze -n $lxc_orig
- frozen=0
- fi
-fi
-
-echo "Updating rootfs..."
-
-# so you can 'ssh $hostname.' or 'ssh $hostname.local'
-if [ -f $rootfs/etc/dhcp/dhclient.conf ] && ! grep -q "^send host-name.*hostname" $rootfs/etc/dhcp/dhclient.conf; then
- sed -i "s/send host-name.*$/send host-name \"$hostname\";/" $rootfs/etc/dhcp/dhclient.conf
-fi
-
-c=$lxc_path/$lxc_new/config
-# change hwaddrs
-mv ${c} ${c}.old
-(
-while read line; do
- if echo $line | grep -q -w '^lxc.network.hwaddr'; then
- echo "lxc.network.hwaddr= 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')"
- else
- echo "$line"
- fi
-done
-) < ${c}.old > ${c}
-rm -f ${c}.old
-
-# set the hostname
-cat <<EOF > $rootfs/etc/hostname
-$hostname
-EOF
-# set minimal hosts
-cat <<EOF > $rootfs/etc/hosts
-127.0.0.1 localhost $hostname
-EOF
-
-# if this was a block device, then umount it now
-if [ $mounted -eq 1 ]; then
- umount $rootfs
-fi
-
-echo "'$lxc_new' created"
projects / thirdparty / lxc.git / commitdiff
