[Observium] Linux custom snmpd & alert

Hello,

I try to find the best solution for add custom alerting for Linux with observium.

As for now it's not possible to use xinetd with new alert system, i wonder how i can add properly custom data that's will be graph and avaible in checker conditions.

I would like add a simple test as custom script that's will download a http page and return 0 if failed or a value in ms for time to download the page. Will add the script in snmpd.conf.

But what will be the best oid for this without change observium code ?

Thanks for help.

Best Regards,

-- Fabien