Actually add that file

roles/nextcloud/templates/backup.sh

@@ -0,0 +1,57 @@
+#! /bin/bash
+#
+# nextcloud.sh
+# Backup script for Nextcloud. Meant to be sourced by our main backup script
+# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
+#
+# Distributed under terms of the MIT license.
+#
+
+set -e
+
+export OUTDIR="$BACKUPSDIR/{{ nextcloud_url }}"
+retention=7 # 7-day retention period
+
+# Sanity checks
+if [ -z "$BACKUPSDIR" ]; then
+	log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
+	return 1
+fi
+if ! [ -d "$OUTDIR" ]; then
+	if ! mkdir "$OUTDIR"; then
+		log "Unable to find or create output directory: $OUTDIR"
+		return 2
+	fi
+fi
+# Enforce permissions on our output directory since the git user will need them
+chown root.git "$OUTDIR"
+chmod 770 "$OUTDIR"
+
+# Purge oldest backup if we need to
+currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
+if (( currentbackupcount >= retention )); then
+	lastbackup="$(find "$OUTDIR" -name \*.zip 2>/dev/null | sort | head -n 1)"
+	if [ -f "$lastbackup" ]; then
+		log "Removing old backup: $lastbackup"
+		rm "$lastbackup"
+	fi
+fi
+# WE MAKE BACKUP NOW SERGEI
+if cd "{{ nextcloud_webroot }}"; then
+	log "Enabling maintenance mode"
+	sudo -u www-data ./oc maintenance:mode --on
+	trap 'sudo -u www-data ./occ maintenance:mode --off' EXIT
+	date="$(date -Iseconds)"
+	log "Creating data backup"
+	tar czf "$OUTDIR/$date-data.tar.gz" "/var/nextcloud"
+	log "Creating webroot backup"
+	tar czf "$OUTDIR/$date-webroot.tar.gz" "{{ nextcloud_webroot }}"
+	log "Creating DB backup"
+	mysqldump nextcloud --single-transaction | gzip > "$OUTDIR/$date-db.sql.gz"
+	log "Unsetting maintenance mode"
+	sudo -u www-data ./occ maintenance:mode --off
+else
+	log "Could not change directory: $OUTDIR"
+	return 3
+fi
+