symbiosis-monit now emails on failure under systemd

monit/debian/symbiosis-monit.install

-sbin/symbiosis-monit          usr/sbin/
+sbin/*                        usr/sbin/
 monit.d/*                     etc/symbiosis/monit.d/
 templates/*                   usr/share/symbiosis/monit/
 lib/*                         usr/lib/ruby/vendor_ruby/
 test.d/*                      etc/symbiosis/test.d/
-debian/symbiosis-monit.timer  lib/systemd/system/
+system/*                      lib/systemd/

monit/sbin/symbiosis-monit-failure-email

+#!/bin/bash
+
+set -e
+
+args="--since=today"
+[ -e "/run/symbiosis-monit.cursor" ] && args="--after-cursor=$(</run/symbiosis-monit.cursor)"
+
+journalctl -b0 $args -u "symbiosis-monit.service" | mail -s "Symbiosis monitor detected service failure" root

monit/system/symbiosis-monit-failure-email.service

+[Unit]
+Description=Notify by email about symbiosis-monit failure
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/symbiosis-monit-failure-email

monit/debian/symbiosis-monit.service → monit/system/symbiosis-monit.service

 [Unit]
 Description=Symbiosis monitor
+OnFailure=symbiosis-monit-failure-email.service
 
 [Service]
 Type=simple
+ExecStartPre=/bin/sh -c 'journalctl -o cat -n 0 -u %n --show-cursor | cut -f3 -d" " > /run/symbiosis-monit.cursor'
 ExecStart=/usr/sbin/symbiosis-monit -t email /etc/symbiosis/monit.d