Initial version of lvm and guests management

Signed-off-by: Michal Čihař <michal@cihar.com>

demo/maintenance/make-snapshot

@@ -0,0 +1,9 @@
+#!/bin/sh
+# Script to make a LVM snapshot of a demo server
+
+if [ -z "$1" ] ; then
+	echo "Usage: make-snapshot NAME"
+	exit 1
+fi
+
+lvcreate -s -n demo-$1-snapshot -L 4G /dev/mapper/pma-demo--$1

demo/maintenance/reset-demo

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+#!/bin/sh
+# Script to reset demo virtual machine to snapshot
+
+if [ -z "$1" ] ; then
+	echo "Usage: reset-demo NAME"
+	exit 1
+fi
+
+virsh destroy demo-$1
+sleep 5
+./restore-snapshot $1
+./make-snapshot $1
+virsh start demo-$1

demo/maintenance/restore-snapshot

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+#!/bin/sh
+# Script to merge LVM snapshot into original volume
+
+if [ -z "$1" ] ; then
+	echo "Usage: restore-snapshot NAME"
+	exit 1
+fi
+
+lvconvert --merge /dev/mapper/pma-demo--$1--snapshot