snapshot instance disk and dump it to STDOUT

diff --git a/gnt-lv-snap-dd.sh b/gnt-lv-snap-dd.sh
new file mode 100755 (executable)
index 0000000..04c10f4
--- /dev/null
+++ b/gnt-lv-snap-dd.sh
@@ -0,0 +1,40 @@
+#!/bin/sh -e
+
+instance=$1
+disk=$2
+test -z "$backup" && backup="backup"
+test -z "$rsync_server" && rsync_server="lib15"
+
+if [ "$1" = '-' ] ; then
+       read instance disk
+elif [ -z "$instance" -o -z "$disk" ] ; then
+       echo "Usage: $0 instance disk"
+       exit 1
+fi
+
+test -z "$instance" && exit 1
+
+instance=`gnt-instance list --no-headers -o name $instance | head -1`
+
+node=`gnt-instance list -o pnode --no-headers $instance`
+echo "# $instance on $node" > /dev/stderr
+
+ssh $node lvs -o name,tags,vg_name | grep $instance | tee /dev/shm/$instace.$node.lvs | grep disk${disk}_data | while read lv origin vg ; do
+       disk_nr=`echo $lv | cut -d. -f2 | tr -d a-z_`
+       echo "# $lv | $origin | $disk_nr" > /dev/stderr
+
+cat <<__SHELL__ > /dev/shm/$instance.sh
+
+       lvcreate -L10240m -s -n$lv.snap /dev/$vg/$lv > /dev/stderr
+
+       dd if=/dev/$vg/$lv.snap bs=1M
+
+       lvremove -f /dev/$vg/$lv.snap > /dev/stderr
+__SHELL__
+
+       scp /dev/shm/$instance.sh $node:/dev/shm/$instance.sh
+
+       ssh $node sh -e /dev/shm/$instance.sh
+
+done
+