I've been looking into replacing our nagios installation with something more versatile and have been testing zabbix. I've metered-up a few hosts but have been wondering about whether the data that the zabbix 'agent' collects is already being collected by Metricbeat. I suspect that the zabbix agent has a few additional features (eg "active mode") but its not clear where it truly stands apart from Metricbeat.
Is there a reason to run both?