Re: Exclude notification for the disk /dev

I see spurious alarms for FreeBSD systems; although they also use a special
filesystem, it seems it may still be flagged as a "fixed disk" filesystem
by Net-SNMP, and thus gets collected by OpenNMS.

On Tue, Sep 4, 2018, 6:24 AM Jonathan Heard <
[email protected]> wrote:

> Hi Yusufdeen,
>
> e.g. from my own /etc/opennms/thresholds.xml
>
>     <group name="netsnmp" rrdRepository="/var/lib/opennms/rrd/snmp/">
> ...
>         <threshold
>             description="Trigger an alert when the percentage of inodes used on any disk (excluding the specified special paths) reaches or goes above 90% for two consecutive measurement intervals"
>             type="high" ds-type="dskIndex" value="90.0" rearm="75.0"
>             trigger="2" ds-label="ns-dskPath" filterOperator="and" ds-name="ns-dskPercentNode">
>             <resource-filter field="ns-dskPath">^(?!(/proc|/sys|/dev/pts|/run|/home|/mnt/home|/var/lib/nfs/rpc_pipefs)).*$</resource-filter>
>             <resource-filter field="ns-dskDevice">^(?!(/dev/loop)).*$</resource-filter>
>         </threshold>
> ....
>     </group>
>
>
> You should be able to modify your own thresholds in a similar way to do a
> RegEx match of paths or devices to exclude... Note that we don't exclude
> /dev but do exclude /dev/pts
>
> I'm actually a bit puzzled about your situation and wonder if you're
> trying to solve the right problem... On modern Linux systems /dev is a
> special 'devfs' filesystem and shouldn't be subject to disk space problems.
>
> Hope this helps
>
> Regards
>
>
> Jonathan
>
>
>
> On 04/09/18 10:25, Yusufdeen wrote:
>
> Dear Friends,
>
> I want to exclude the notification for the drive "/dev".Many of the server
> have /dev storage.it's almost reaches the disk percentage 95%.We have
> received couple of notification for those server.
>
> High threshold exceeded for SNMP datasource hrStorageUsed / hrStorageSize
> * 100.0 on interface 172.17.250.55, parms: label="/dev" ds="hrStorageUsed /
> hrStorageSize * 100.0" description="Trigger an alert when the percentage of
> disk space used reaches or goes above 90% for two consecutive measurement
> intervals (only for disks of type hrStorageFixedDisk, such as a locally
> attached or USB-attached hard disk)" value="100" instance="34"
> instanceLabel="dev" resourceId="node[48].hrStorageIndex[dev]"
> threshold="95.0" trigger="2" rearm="90.0"
>
> Could you please tell how to exclude/avoid  /dev disks notification/alert.
>
> *Thanks & Regards*
> *Yusuf*
>
>
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-- 

Mike Kelly

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