From df75c75fc16a7e29754cafc2e7f6a5eab70e7eec Mon Sep 17 00:00:00 2001
From: Udo Waechter <udo@maketank.net>
Date: Tue, 18 Nov 2025 12:38:42 +0100
Subject: [PATCH] Systemd mounts for auto02

---
 roles/backup_server/files/backup-disks.sh | 29 +++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 roles/backup_server/files/backup-disks.sh

diff --git a/roles/backup_server/files/backup-disks.sh b/roles/backup_server/files/backup-disks.sh
new file mode 100644
index 0000000..4f6ea9f
--- /dev/null
+++ b/roles/backup_server/files/backup-disks.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/bash
+#
+#set -Eeuo pipefail
+#
+MQTT='mosquitto_pub -h mqtt.chaos -t switch_backup/switch'
+BASEDIR="/backup"
+
+
+#${MQTT}/debug -m "ARGS: \"$@\""
+
+#check for an unmount event
+if [[ "$@" == "CHECK-MOUNTS-AND-SHUTDOWN" ]]; then
+	OPEN_FILES=$(lsof ${BASEDIR}/* |grep -c ${BASEDIR})
+	[[ ${OPEN_FILES} -eq 0 ]] && umount ${BASEDIR}/*
+	MOUNTS=$(grep -e ${BASEDIR} /proc/self/mounts | grep -v autofs -c)
+	[[ ${MOUNTS} -gt 0 ]] &&  exit 0 #We still have mounts
+	#No mounts left, shutdown disk
+	vgchange -an backup >/dev/null
+	sync
+	sleep 5
+	${MQTT}/switch_backup_power/command -m OFF
+	exit 0
+fi
+#default case, echo mount string for autofs
+${MQTT}/switch_backup_power/command -m ON
+sleep 15 
+vgchange -ay backup >/dev/null
+
+echo "-fstype=btrfs,defaults,compress=lzo :/dev/backup/${1}"