Hi Tom,

Fair enough, I think you are right about lldpd, as the servers are giving their actual hostname.

I need to check what actually added the RRDNS, so I can prevent it.

Thanks for the pointers.

Best regards,

Louis

Louis,

I think it's best if you don't add them to Observium then ;-)

You'll need to figure out why it's being added - it won't be because of LLDP.

As the devices are returning differing host names via sysName, I'll assume they're returning distinct names via lldpd as well...

Tom

Hi,

 

Actually what I tried to say is that I don’t care about the RRDNS and  don’t want Observium to add them as devices.

I just want the actual devices behind the RRDNS to be monitored.

I have a quite large environment and rely on the auto discovery so it would nice if the auto discovery was smart enough so it doesn’t keep adding the RRDNS aliases.

 

Best regards,

Louis

 

 

Louis Bailleul Computer Systems Engineer Imaging & Engineering | Imaging   Telephone: +44 1932 376000 Direct: +44 1932 376842 VOIP: 74416842 Mobile: +44 7786 525307 Email: louis.bailleul@pgs.com   A Clearer Image | www.pgs.com

From: observium [mailto:observium-bounces@observium.org] On Behalf Of Jason Lixfeld
Sent: Friday, March 11, 2016 12:53
To: Observium Network Observation System
Subject: Re: [Observium] Avoid adding round robin dns devices

 

RRDNS is generally a mechanism used to hold up a service.  Since Observium is not a service checker, this will probably never work the way you want.  Observium's design goals are to monitor devices, so best practices for its use would be to monitor the real devices within the RR.

Sent from my iPhone

On Mar 11, 2016, at 7:33 AM, Louis Bailleul <Louis.Bailleul@pgs.com> wrote:

Hi,

 

I have some devices that are configured with a round robin DNS entry.

I believe that as we are running lldp on servers too, the auto discovery pick them up and add them.

 

But as the picture below shows, this is pretty much useless as each polling end up on a different server.

(You can see that the sysdescr and sysname contains contradictory data : lxfer01 and lxfer02)

 

Would it be possible to detect that the FQDN is a round robin alias and avoid adding it as a new device ?

And it would be perfect if it could be the same for CNAME as well, as it is not really worthwhile having Observium polling a node for each of its aliases.

 

<image001.png>

 

 

Best regards,

Louis

 

Louis Bailleul Computer Systems Engineer Imaging & Engineering | Imaging   Telephone: +44 1932 376000 Direct: +44 1932 376842 VOIP: 74416842 Mobile: +44 7786 525307 Email: louis.bailleul@pgs.com   A Clearer Image | www.pgs.com

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