zabbix-agent: Add item for failed systemd units

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/zabbix-agent/files/systemd-units-failed.py

+#!/usr/bin/python
+
+import dbus
+
+bus = dbus.SystemBus()
+systemd1 = bus.get_object('org.freedesktop.systemd1', '/org/freedesktop/systemd1')
+systemd1_manager = dbus.Interface(systemd1, dbus_interface='org.freedesktop.systemd1.Manager')
+
+units = systemd1_manager.ListUnits()
+for unit in filter(lambda u: u[3] == 'failed', units):
+    print(unit[0])

roles/zabbix-agent/tasks/main.yml

 ---
 
 - name: install packages
-  pacman: name=zabbix-agent
+  pacman: name=zabbix-agent,python-dbus
 
 - file: path=/etc/zabbix state=directory owner=root group=root mode=755
 
@@ -20,6 +20,11 @@
   template: src=my.cnf.j2 dest=/etc/zabbix/zabbix_agentd.my.cnf owner=zabbix-agent group=zabbix-agent mode=600
   when: zabbix_agent_mysql_user is defined
 
+- name: Install helper scripts
+  copy: src={{item}} dest=/usr/local/bin/{{item}} mode=0755 owner=root group=root
+  with_items:
+    - systemd-units-failed.py
+
 - name: run zabbix agent service
   service: name=zabbix-agent enabled=yes state=started
 

roles/zabbix-agent/templates/zabbix_agentd.conf

@@ -17,6 +17,8 @@ UserParameter=systemd.unit.is-active[*],systemctl is-active --quiet '$1' && echo
 UserParameter=systemd.unit.is-failed[*],systemctl is-failed --quiet '$1' && echo 1 || echo 0
 UserParameter=systemd.unit.is-enabled[*],systemctl is-enabled --quiet '$1' && echo 1 || echo 0
 
+UserParameter=systemd.failed_units,/usr/local/bin/systemd-units-failed.py
+
 UserParameter=postfix.pfmailq,mailq | grep -v "Mail queue is empty" | grep -c '^[0-9A-Z]'
 UserParameter=postfix[*],/usr/local/bin/postfix-zabbix-stats.sh $1