Disk Space - Reporting Error (incorrect)

[jcmanous]

Greetings,

I recently added a host (Linux - RHEL 6.6) to monitor via SNMP and it's reporting 153% utilization. I verified that net-snmp is up to date to no avail.

It's worth nothing that this didn't happen on any of the others.

Ideas?

[jcmanous]

I should also add, as I just realized, that this is on an XFS file system.

[ssax]

Please run the command from the command line and show us the command (sanitized) and the full output of the command so that we can try to debug it for you.

[ssax]

It's worth nothing that this didn't happen on any of the others.

Do you mean you have other servers returning proper values with XFS as well?

Also, you could grab the full command and output by going to Configure > Core Config Manager > Services edit the service and click the test button.

[jcmanous]

This is odd...

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COMMAND: /usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "\^/data\$" -w 80 -c 95 -f
OUTPUT: Unknown storage : \^/data$ : ERROR

This doesn't break in the View->Services display but running it manually irritates it.

Also, the other file system(s) are ext4. Sorry for the confusion.

[lmiltchev]

Testing from within CCM may fail sometimes, because of escaping issues. Try running the following command from the CLI :

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/usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "^/data$" -w 80 -c 95 -f

and show the output.

[jcmanous]

Output from the command:

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/usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "^/data$" -w 80 -c 95 -f

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/data: 153%used(2746858MB/1794802MB) (>95%) : CRITICAL | '/data'=2746858MB;1435842;1705062;0;1794802

This is what's reported within the GUI as well.

[lmiltchev]

How large is the drive? Can you run the following command and report the output?

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df -h

Do you get the "expected" output if you add a "-G" flag to your command?

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/usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "^/data$" -G -w 80 -c 95 -f

[jcmanous]

Everything reports the same as before..

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Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VG00_System-LV01_Root
                      193G  163G   21G  90% /
tmpfs                 190G  4.0K  190G   1% /dev/shm
/dev/sda1             477M   79M  373M  18% /boot
/dev/mapper/VG00_System-LV02_Data
                       18T   11T  7.1T  60% /data

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shell#/usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "^/data$" -G -w 80 -c 95 -f
/data: 153%used(2683GB/1753GB) (>95%) : CRITICAL | '/data'=2683GB;1402;1665;0;1753

[lmiltchev]

I found a version of the plugin online that is *supposed to be newer* even though it shows the same version (1.3.3). You can give it a try. Rename the original plugin:

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mv /usr/local/nagios/libexec/check_snmp_storage_wizard.pl /usr/local/nagios/libexec/check_snmp_storage_wizard_old.pl

Download the file below, unzip it, and copy it to the "libexec" directory:

check_snmp_storage_wizard.zip

Make it executable and test your check again:

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chmod +x /usr/local/nagios/libexec/check_snmp_storage_wizard.pl
/usr/local/nagios/libexec/check_snmp_storage_wizard.pl -H xxx.xxx.xxx.xxx  -C public --v2c -m "^/data$" -w 80 -c 95 -f

If it doesn't work - revert back to the original plugin:

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mv /usr/local/nagios/libexec/check_snmp_storage_wizard_old.pl /usr/local/nagios/libexec/check_snmp_storage_wizard.pl