This page (revision-45) was last changed on 23-Apr-2022 17:06 by Harry Metske

This page was created on 23-Apr-2022 17:05 by Harry Metske

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Version Date Modified Size Author Changes ... Change note
45 23-Apr-2022 17:06 24 KB Harry Metske to previous
44 23-Apr-2022 17:05 24 KB Harry Metske to previous | to last
43 23-Apr-2022 17:05 24 KB Harry Metske to previous | to last
42 23-Apr-2022 17:05 24 KB Harry Metske to previous | to last
41 23-Apr-2022 17:05 21 KB Harry Metske to previous | to last

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Computerhok 2013
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At line 605 added 58 lines
#!/bin/bash
#
# copy an lxc (filesystem) to another one
# args: <src lxc> (must bu either cn1 or cn4, they will get copied to resp. cn2 and cn3)
#
# funtions first
logDie()
{
msg=$1
echo "$msg"
exit 8
}
# m a i n l i n e
#
NUMARGS=$#
if [ $NUMARGS -ne 1 ]; then
echo "Usage: lxc-copy <src lxc> (must bu either cn1 or cn4, they will get copied to resp. cn2 and cn3)"
exit 8
fi
SRCLXC=$1
if [ $SRCLXC != "cn1" -a $SRCLXC != "cn4" ]; then
echo "argument must be either cn1 or cn4"
exit 8
fi
TGTLXC=cn2
if [ $SRCLXC = "cn4" ]; then
TGTLXC=cn3
fi
echo "cloning from $SRCLXC to $TGTLXC"
mount |grep "/var/lib/lxc/${TGTLXC}" > /dev/null || logDie "/var/lib/lxc/${TGTLXC} is not mounted"
TGTDIR=/var/lib/lxc/${TGTLXC}/rootfs
OLDIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
OLDUUID=`cat /etc/fstab|grep /${TGTLXC} | awk '{ print $1}'|awk -F= '{ print $NF}'`
# save old metadata of target lxc
cd /var/lib/lxc/${TGTLXC} && tar -cf /tmp/old-metadata-of-TGTLXC.tar config fstab rootfs.hold || logDie "saving old metadata of ${TGTLXC} failed"
cd -
MNTPOINT=/var/lib/lxc/${TGTLXC}
echo "umounting ${MNTPOINT}"
umount ${MNTPOINT} || logDie "umount failed for ${MNTPOINT}"
echo "dumping source filesystem"
TAPEFILE=/tmp/savedfs.fsa
fsarchiver -A savefs ${TAPEFILE} /dev/mapper/vg0-lvol.${SRCLXC} || logDie "fsarchive savefs failed"
echo "restoring filesystem"
fsarchiver restfs ${TAPEFILE} id=0,dest=/dev/mapper/vg0-lvol.${TGTLXC} || logDie "fsarchive restfs failed"
echo "restoring old UUID ${OLDUUID}"
tune2fs /dev/mapper/vg0-lvol.${TGTLXC} -U ${OLDUUID}
echo "mounting back again"
mount -a | logDie "mount -a failed"
echo "restoring old metadata"
cd /var/lib/lxc/${TGTLXC} && tar -xf /tmp/old-metadata-of-TGTLXC.tar || logDie "restoring old metadata failed"
echo "patching /etc/hostname, /etc/hosts and /etc/network/interfaces ==> $TGTLXC / $OLDIP"
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hostname || logDie "patching /etc/hostname failed"
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hosts || logDie "patching /etc/hosts failed"
WRONGIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
sed --in-place s/${WRONGIP}/${OLDIP}/g ${TGTDIR}/etc/network/interfaces || logDie "patching /etc/network/interfaces failed"
rm -f ${TAPEFILE} /tmp/old-metadata-of-TGTLXC.tar
This page (revision-45) was last changed on 23-Apr-2022 17:06 by Harry MetskeTop