Configuring Storage Thresholding
Make sure that you have at least 1 Windows or Linux SNMP Node configured (We need a device to monitor)
- Check to see if your selected node is able to monitor its Disk Usage
- In the OpenNMS dashboard, we can check this by: Selecting
“Reports”>“Resource Graphs”>Select Resource Node(ex. Web01) > Verify that you system has the following Node Resource Available“Storage (SNMP MIB-2 Host Resources)”
To Configure Thresholds: Select “Configure OpenNMS” in the top right corner of your dashboard (should be an icon with 3 gears) > Scroll down to “Performance Measurement” and select “Configure Thresholds” > Edit “hrstorage” configuration > add or modify the Threshold configs to suit your environment > Lastly go back to “Threshold Groups” and click “Reload Threshold Configuration” to apply our changes. Additional information can be found here.
In order to test if the threshold monitoring works, I copied files (ex. iso files) onto the network monitored system using the SCP command. If configured correctly, we should receive a “Threshold Exceeded” alarm in our OpenNMS Dashboard with more detailed information in the node’s alarm event viewer as shown below.
Figures 1.1 + 1.2: Screenshots of the High Threshold Exceeded Alert being triggered on the Web01 system after its disk storage exceeded its specified threshold capacity.