Check manual page of haproxy.frontend
HAProxy: Status of the Frontends
This check monitors the status of the frontends of the HAProxy loadbalancer
for TCP and HTTP connections. It requires the mk_haproxy.freebsd agent plugin
to be installed on the FreeBSD host to be monitored.
The check is OK if the frontend has the status OPEN. It is CRIT
The name of the frontend.
One service for each frontend is created.