Fix backup/restore procedure

- Restore the "active from" timestamp
- Add to the backup and restore the "active to" timestamp

imageroot/actions/restore-module/06copyenv

@@ -1,23 +1,8 @@
 #!/usr/bin/env python3
 
 #
-# Copyright (C) 2022 Nethesis S.r.l.
-# http://www.nethesis.it - [email protected]
-#
-# This script is part of NethServer.
-#
-# NethServer is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License,
-# or any later version.
-#
-# NethServer is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with NethServer.  If not, see COPYING.
+# Copyright (C) 2024 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
 
 import sys
@@ -33,5 +18,15 @@ for evar in [
         "LOKI_API_AUTH_PASSWORD",
         "LOKI_LOGS_INGRESS_TOKEN",
         "LOKI_RETENTION_PERIOD",
+        "LOKI_ACTIVE_FROM",
     ]:
     agent.set_env(evar, original_environment[evar])
+
+try:
+    backup_env = agent.read_envfile("backup.env")
+except:
+    backup_env = {}
+
+# If available, restore the backup approximate timestamp
+if "LOKI_ACTIVE_TO" in backup_env:
+    agent.set_env("LOKI_ACTIVE_TO", backup_env["LOKI_ACTIVE_TO"])

imageroot/bin/module-cleanup-state

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2024 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+set -e
+
+# Redirect any output to the journal (stderr)
+exec 1>&2
+
+rm -vf backup.env

imageroot/bin/module-dump-state

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+#
+# Copyright (C) 2024 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+import json
+import sys
+import agent
+
+agent.write_envfile("backup.env", {
+    'LOKI_ACTIVE_TO': datetime.datetime.now().astimezone().isoformat(),
+})

imageroot/etc/state-include.conf

@@ -1 +1,2 @@
 volumes/loki-server-data
+state/backup.env