requirements: domU is lvm-based, space for snapshot is free in volumegroup
description: full- or incbackups without interrution of the running domU. All files committed/synced there to the filesystem when the snapshot is taken get available for backup. Backup is taken from dom0, backupclient is only there installed.
grep ^disk /etc/xen/vm/blvm.run # get the lv-volume of the domU
lvs /dev/system/lv_domu_benchlvm # optional: verify the logical volume of the domU is accessable
lvcreate -s -L 2G -n lv_domu_benchlvm-snap /dev/system/lv_domu_benchlvm # create the snapshot in the volumegroup
kpartx -a /dev/system/lv_domu_benchlvm-snap # get the devnodes for mounting
fsck /dev/mapper/system-lv_domu_benchlvm--snap2 # optional: check if fs-structure is ok
mount /dev/mapper/system-lv_domu_benchlvm--snap2 /mnt/tmp # mount the partition to be backupped
cd /mnt/tmp && tar cf .... # do the actual full- or incbackup now
umount /mnt/tmp
kpartx -d /dev/system/lv_domu_benchlvm-snap # free the no longer needed devnodes
lvremove /dev/system/lv_domu_benchlvm-snap # and remove the snapshot again
requirements: domU is lvm-based, space for snapshot is free in volumegroup, space for copy
description: lvm-snapshot can either be blockwise backed up or copied into an other lvm-volume to clone the domU. All that without interruption of the domU. The volume can also be copied over to a different dom0.
lvcreate -s -L 2G -n lv_domu_benchlvm-snap /dev/system/lv_domu_benchlvm # create the snapshot
lvdisplay /dev/system/lv_domu_benchlvm # how many le does the original volume consist of? here 1792
lvcreate -l 1792 -n lv_domu_benchlvm-copy system # create a fresh volume of exact same size, or bigger
cat /dev/system/lv_domu_benchlvm-snap >/dev/system/lv_domu_benchlvm-copy # make the copy
lvremove /dev/system/lv_domu_benchlvm-snap # remove snapshot
kpartx -av /dev/system/lv_domu_benchlvm-copy # get devnodes of partitions
mount /dev/mapper/system-lv_domu_benchlvm--copy2 /mnt/tmp
for i in /mnt/tmp/etc/sysconfig/network/ifcfg-eth-id-aa*; do mv -v $i "`echo $i|sed -e 's,13,20,'`"; done
# fix network-devices
kpartx -dv /dev/system/lv_domu_benchlvm-copy # remove devnodes
cp /etc/xen/vm/blvm.run /etc/xen/vm/blvmclone.run # copy xenfile
vi /etc/xen/vm/blvmclone.run # modify name, macs, lvm-name
vi /etc/hosts # add newly assigned ip/hostname
vi /etc/dhcpd.conf && rcdhcpd restart # add newly assigned ip/hostname/mac
xm cr /etc/xen/vm/blvmclone.run
requirements: works for file-based domU
description: Shutdown domU, mount diskfile on dom0, backsup full or inc, startup domU.
xm shutdown 110 # make sure domU is shut down.
grep ^disk /etc/xen/vm/bnas.run # what exactly is the diskfile?
lomount -diskimage /mnt/nfs_domu/domu_bnas -partition 2 /mnt/tmp
cd /mnt/tmp && tar cf .... # take the backup in you way..
cd; umount /mnt/tmp; xm cr /etc/xen/vm/bnas.run # cleanup & start up domU again.