zabbix: Install perl deps of mysql userstats when required

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

hosts

@@ -29,6 +29,10 @@ orion.archlinux.org
 apollo.archlinux.org
 soyuz.archlinux.org
 
+[mysql-servsers]
+apollo.archlinux.org
+luna.archlinux.org
+
 [buildservers]
 soyuz.archlinux.org
 sgp.pkgbuild.com

roles/zabbix-agent/tasks/main.yml

@@ -3,6 +3,10 @@
 - name: install packages
   pacman: name=zabbix-agent,python-dbus
 
+- name: install mysql userstats monitoring packages
+  pacman: name=perl-dbi,perl-dbd-mysql,perl-json
+  when: "'mysql-servers' in group_names"
+
 - file: path=/etc/zabbix state=directory owner=root group=root mode=755
 
 - name: create host PSK