bundles/postfix: use own postqueue exporter

bundles/postfix/files/postfix-telegraf-queue

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+
+
+from json import loads
+from subprocess import check_output
+
+
+queue_counts = {}
+
+queue_json = check_output(['sudo', '/usr/sbin/postqueue', '-j'])
+for line in queue_json.splitlines():
+    j = loads(line.decode('UTF-8'))
+    queue_counts.setdefault(j['queue_name'], 0)
+    queue_counts[j['queue_name']] += 1
+
+for queue in ('incoming', 'active', 'deferred', 'corrupt', 'hold'):
+    print('postfix_queue,status={} count={}i'.format(queue, queue_counts.get(queue, 0)))