Implement dynamic backups for ostree systems, backing up system configuration in its entirety

roles/backup/templates/s3backup.sh

@@ -33,7 +33,18 @@ declare -a DIRS
 {% for item in backup_s3backup_list + backup_s3backup_list_extra %}
 DIRS+=("{{ item }}")
 {% endfor %}
-# End directories
+# End directory manual configuration
+
+# If we have ostree, add diff'd configs to the list, too
+if command -v ostree > /dev/null 2>&1; then
+	for file in $(
+		ostree admin config-diff 2>/dev/null | \
+		grep -e '^[A|M]' | \
+		awk '{print $2}'
+	); do
+		DIRS+=("/etc/$file")
+	done
+fi
 
 # Tar up all items in the backup list, recursively, and pipe them straight
 # up to S3