Monitor Varnish with Zabbix

Add the following to the end of /etc/zabbix/zabbix_agentd.conf

# Varnish Keys
UserParameter=varnish.stat[*],(test -f /usr/bin/varnishstat && varnishstat -1 -f $1 | awk '{print $$2}')

Restart the Zabbix agent

/etc/init.d/zabbix-agent restart