Nagios Support Forum

We have the Log Server data saving to an NFS mount and looks like this is throwing the global stats off. We are not seeing the "Data Written" and "I/O Size" data. I am guessing this could be due to the nature of us moving the data location. Is this something we could adjust and fix?

This metric is pulled from an elasticsearch query. Please run the following on one of your problem nodes: Let us know the results. My guess is that either elasticsearch can't calculate disk read/write actions via NFS or the GUI is having trouble communicating with the subsystem. I think the former is more likely.

Looks like you are right. There are no disk stats. I ran the same command on a test node which had local disks and it is returning a number of disk statistics.

My guess is that the elasticsearch API does not support monitoring the disk stats on a remote NFS mount. This guess might be taken further based on a quote from the elasticsearch team:

Do not place the index on a remotely mounted filesystem (e.g. NFS or SMB/CIFS); use storage local to the machine instead.

I'm doing some further digging - I'll let you know what I find out.

Since elasticsearch cannot read the data here, we cannot report it properly in the GUI. I traced the code down to this section, view-able via github: https://github.com/elastic/elasticsearc ... monitor/fs

I suggest filing a bug report to the elasticsearch team, since I cannot find an existing bug regarding this issue. https://github.com/elastic/elasticsearch/issues

In the meantime, you could use something like iostatto monitor your disk performance.