From 6f7bf4f92b8735f90813fcaec9e94faa21109c97 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Fri, 10 Mar 2023 16:03:38 +0100
Subject: [PATCH] just create snapshot of lvm, zamd will pull it

---
 gnt-lv-snap-shell.sh | 58 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100755 gnt-lv-snap-shell.sh

diff --git a/gnt-lv-snap-shell.sh b/gnt-lv-snap-shell.sh
new file mode 100755
index 0000000..819abc2
--- /dev/null
+++ b/gnt-lv-snap-shell.sh
@@ -0,0 +1,58 @@
+#!/bin/sh -e
+
+instance=$1
+disk=$2
+test -z "$backup" && backup="backup"
+
+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"
+
+found_lvm=0
+
+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
+	found_lvm=1
+
+	disk_nr=`echo $lv | cut -d. -f2 | tr -d a-z_`
+	echo "# $lv | $origin | $disk_nr"
+
+cat <<__SHELL__ > /dev/shm/$instance-mount.sh
+
+	lvcreate -L10240m -s -n$lv.snap /dev/$vg/$lv
+
+	mkdir /dev/shm/$lv.snap
+
+	# we must mount filesystem read-write to allow journal recovery
+	offset=\`fdisk -l /dev/$vg/$lv.snap -u | grep Linux | grep /dev/$vg/$lv.snap | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'\`
+	test ! -z "\$offset" && offset=",offset=\$offset"
+	mount /dev/$vg/$lv.snap /dev/shm/$lv.snap -o noatime\$offset
+
+	echo "rsync-from $node:/dev/shm/$lv.snap/"
+
+__SHELL__
+
+cat <<__SHELL__ > /dev/shm/$instance-umount.sh
+	umount /dev/shm/$lv.snap
+
+	lvremove -f /dev/$vg/$lv.snap
+
+	rmdir /dev/shm/$lv.snap
+__SHELL__
+
+	scp /dev/shm/$instance-*.sh $node:/dev/shm/
+
+	ssh $node sh -xe /dev/shm/$instance-mount.sh
+
+	echo "ssh $node sh -xe /dev/shm/$instance-umount.sh"
+
+done
-- 
2.20.1