Devmon / MRTG

[mv652 at softhome.net]

That's helped to explain things very nicely, thank you. 

I am, in fact using CENTOS, so should have it setup quite soon. 

I'll place any futrure devmon questions in the relevant lists. 


Regards,
Mario 


Buchan Milne writes: 

> On Friday, 14 August 2009 15:08:33 mv652 at softhome.net wrote:
>> Hi, 
>>
>> Could I get a quick-and-dirty explanation regarding the Devmon
>> implementation in Xymon 4.3.x?
> 
> Nothing has changed regarding Devmon in Xymon 4.3.x. 
> 
> However, Xymon itself has some basic native SNMP support, which is new in 
> 4.3.x. 
> 
>> The way I understand it, Devmon provides SNMP capabilities to Xymon so the
>> monitoring server can poll SNMP capable devices. 
>>
>> How is this different to Integrating MRTF data into XYMON, for example?
> 
> Devmon only polls devices, does conversion and formatting of data, which it 
> then sends to Xymon as a normal status message. A devmon RRD collector is now 
> shipped with Xymon (as of 4.2.2), that allows RRD graphs to be created by 
> Xymon for any test/template that includes data intended for this purpose 
> (using the rrd option to the TABLE operator in the template file on the devmon 
> side), if the test is mapped to use this collector (in the TEST2RRD variable 
> in hobbitserver.cfg). 
> 
> Besides the graphs, devmon will also change the "colour" of the tests based on 
> thresholds, allowing you to alert on SNMP data (including non-graph data). 
> 
>> If I am interesting in getting bandwidth for various device interfaces, I
>> am assuming it is best to do via Devmon rather than integrate MRTG?
> 
> I think it is probably easier to get bandwidth graphs up with Devmon than with 
> MRTG, and alerts based on link utilisation will be available out-the-box. 
> 
>> Lastly, is there a readme / howto that explains devmon-xymon setup?
> 
> If you're on a distro that provides devmon, it is more or less a matter of: 
> 
> # $install devmon 
> 
> (where install=urpmi for Mandriva, or $install="yum install" on RHEL or CentOS 
> if you have added the repo at e.g.  
> http://staff.telkomsa.net/packages/rhel5/xymon) 
> 
> # vi /etc/devmon.cfg 
> 
> (set your SNMP community strings in the SNMPCIDS variable, the others should 
> have adequate defaults) 
> 
> # /etc/init.d/devmon readbbhosts 
> 
> # /etc/init.d/devmon start 
> 
> 
> If you're adventurous, you could add the weathermap (see 
> http://staff.telkomsa.net/~bgmilne/xymon/). 
> 
> If you're not on a distro with packages available, please see the INSTALLATION 
> and USING files shipped in the docs directory. 
> 
> Regards,
> Buchan 
>