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+====== Burp - backup and restore program ======
+[[https://burp.grke.org/|BURP]] is a powerful backup and restore tool.
+===== backup lvm snapshots =====
+I backup virtual machines from hypervisors using burp and lvm (thin) snapshots.
+<file conf /etc/burp/burp.conf>
+backup_script_pre=/etc/burp/pre_backup.sh
+backup_script_post=/etc/burp/post_backup.sh
+</file>
+**/etc/burp/pre_backup.sh** and **/etc/burp/post_backup.sh** are both symlinks to **/etc/burp/backup_lvm.sh**
+<file bash /etc/burp/backup_lvm.sh>
+#!/bin/sh
+set -e
+MNT=/mnt/burp
+PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin:/usr/local/sbin
+SUFFIX=_burp
+MNT=/mnt/burp
+snapshot() {
+	vg=$2
+	lv=$3
+	lvsnap=${4:-$3}$SUFFIX
+	mnt=$MNT/${4:-$3}
+	partition=$5
+	if test -z "$vg" -o -z "$lv"; then
+		echo "bad params: $@" 1>&2
+		exit 1
+	fi
+	if [ "$1" = "pre" ]; then
+		mkdir -p $mnt
+		thin=$(lvs $vg/$lv | tail -n 1 | awk '{ print $5 }')
+		if [ -n "$thin" ]; then
+			lvcreate -kn -n $lvsnap -s $vg/$lv
+		else
+			lvcreate -L2G -s -n $lvsnap $vg/$lv
+		fi
+		#lvchange -ay -K $vg/$lvsnap
+		sleep 1
+		if test -n "$partition"; then
+			kpartx -avs /dev/mapper/$vg-$lvsnap
+			dev=/dev/mapper/$vg-$lvsnap$partition
+		else
+			dev=/dev/mapper/$vg-$lvsnap
+		fi
+		mount $dev $mnt
+	elif [ "$1" = "post" ]; then
+		umount -f $mnt || true
+		if test -n "$partition"; then
+			kpartx -d /dev/mapper/$vg-$lvsnap || true
+		fi
+		lvremove -f $vg/$lvsnap || true
+	fi
+}
+script=$(basename $0)
+if [ "$script" = "pre_backup.sh" ]; then
+	action=pre
+elif [ "$script" = "post_backup.sh" ]; then
+	action=post
+else
+	echo "bad invocation $0" 1>&2
+	exit 1
+fi
+while IFS= read -r line; do
+	echo "$line" | grep -q '^#' && continue
+	test -z "$line" && continue
+	snapshot $action $line
+done < "$(dirname $0)/backup_lvm.conf"
+</file>
+The file reads its config from **/etc/burp/backup_lvm.conf** which list the logical volumes to be snapshoted and mounted before burp runs, for instance:
+<file conf /etc/burp/backup_lvm.conf>
+# VGNAME LVNAME (MNT_NAME) (PARTITION)
+vg0 root
+vg0 vm_build build 1
+vg0 vm_k2 k2 1
+vg0 vm_k2_data k2_data
+vg0 vm_db db 1
+vg0 vm_db_postgres db_postgres
+vg0 vm_db_mysql db_mysql
+vg0 vm_db_logs db_logs
+</file>
+Then on server side, just **include=** mountpoint from **/mnt/burp** to the list of filesystems to be backup by burp.

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