Hi Anthony,

Just as Adam mentioned, use a local cache. Be aware that we had issues with the 'native' systemd-resolved daemon on ubuntu that was actually triggering a lot of dns resolution errors in observium where there was no issue at all. I'd recommend removing/disabling systemd-resolved altogether (if you have that) and if needed, replace it with another caching daemon (we used bind, but others like dnsmasq, unbound or powerdns would probably do).

My 2¢

Ahmed.

Le mer. 2 juin 2021, à 18 h 36, adama--- via observium < observium@observium.org> a écrit :

I’d also recommend using a local caching dns on the observium system.

Adam.

*From:* observium observium-bounces@observium.org *On Behalf Of *Mike Stupalov via observium *Sent:* 02 June 2021 13:28 *To:* Observium observium@observium.org; Pisano, Anthony D. via observium observium@observium.org *Cc:* Mike Stupalov mike@observium.org *Subject:* Re: [Observium] Option to Ignore Device Down due to DNS failure

Hi,

use alert checker conditions like this:

device_status eq 0 device_status_type ne dns

Pisano, Anthony D. via observium wrote on 01.06.2021 19:11:

Hello,

We have had a couple incidents where for one reason or another Observium has been unable to resolve DNS.

This generates hundreds of emails saying the entire network is down, and again when it comes back up.

Is there a way to tell Observium not to alert when a device is failed due to DNS lookup?

*Anthony Pisano* | Network Design Engineer | IMSS anthony.pisano@caltech.edu | (626) 395-4255 | Caltech | *caltech.edu http://caltech.edu/*

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