Re: Exclude notification for the disk /dev

Hi Yusufdeen,

     You should be able to filter out alerts for /dev simply by using an 
amended version of the snippet I sent. I've never noticed it at 100% on 
any of the Ubuntu or RHEL Linux hosts I've used but it looks like it 
will report 100% in some scenarios - e.g. 
https://apple.stackexchange.com/questions/267165/why-is-devfs-full

Therefore if you update the thresholds.conf file but change my snippet 
to it excludes all of /dev and then restart OpenNMS, you should stop 
receiving alerts.

Thanks

Jonathan



On 05/09/18 14:09, Yusufdeen wrote:
> Dear Jonathan,
>
> Thank You for your reply....it's really appreciated....
>
> You can see alert message.what i am understand from your reply, we 
> can't exclude /dev alerts but do exclude /dev/pts.I don't want those 
> alerts message. Is there is any solution for this issue ?
>
> image.png
>
> image.png
>
>
> Thank You,
>
> On Tue, Sep 4, 2018 at 6:25 PM Jonathan Heard 
> <[email protected] 
> <mailto:[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 <http://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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> *

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