Fix labsync not overwriting existing lvm

packer/initramfs/labsync

@@ -13,7 +13,7 @@ labsync_create_or_resize_lv() {
 
 	if [ -z "$current_lv_size_bytes" ]; then
 		# no size returned, it's likely that lv doesn't exist
-		lvm lvcreate -L ${new_size_bytes}b -n "$lv" "$vg"
+		lvm lvcreate --wipesignatures y -L ${new_size_bytes}b -n "$lv" "$vg"
 	elif [ "$minimum_size_bytes" != "" ] && [ $minimum_size_bytes -gt 0 ]; then
 		# lv already exists
 		if [ $current_lv_size_bytes -lt $minimum_size_bytes ]; then
@@ -72,6 +72,9 @@ labsync_premount() {
 
 
 labsync_mount_root() {
+	set -x
+	sed -i 's/use_lvmetad = 1/use_lvmetad = 0/' /etc/lvm/lvm.conf
+	vg_name="vglab"
 	if [ -z "$labsync_localboot" ]; then
 		labsync_info "Downloading torrent file from ${labsync_torrent}"
 		while ! wget -T 10 -O /tmp/torrent "${labsync_torrent}"; do sleep 1; done
@@ -89,7 +92,18 @@ labsync_mount_root() {
 		size_part_2=$(((size_disk - labsync_partsize_boot) * 1024 * 1024 / 512))
 		start_part_2=$((size_part_1 + 2048))
 
-		sfdisk -q ${labsync_disk} << PARTTABLE
+		dmsetup ls --tree
+
+		lvm vgs -o NAME --noheadings | while read vg; do
+			if [ "$vg" != "$vg_name" ]; then
+				lvm vgchange -an "$vg"
+				find /dev -mindepth 1 -maxdepth 1 -name "$vg" -exec dmsetup remove '{}' \;
+			fi
+		done
+
+		dmsetup ls --tree
+
+		sfdisk --force -q ${labsync_disk} << PARTTABLE
 label: dos
 label-id: 0xdeadbeef
 device: ${labsync_disk}
@@ -99,10 +113,12 @@ ${labsync_disk}1 : start=         2048, size=     $size_part_1, type=83
 ${labsync_disk}2 : start=$start_part_2, size=     $size_part_2, type=8e
 PARTTABLE
 
+		while ! blockdev --rereadpt /dev/sda; do
+			sleep 1
+		done
 
 		labsync_info "Doing lvm stuff"
 		pv_device="${labsync_disk}2"
-		vg_name="vglab"
 
 		lvm pvcreate -t "$pv_device"
 		pvstatus=$?