Check manual page of nfsmounts

nfsmounts

Author: Mathias Kettner

License: GPL

Distribution: official part of Check_MK

Supported Agents: Linux

This check probes the availability of NFS mounts. The Linux agent sends the status of all NFS mounts, if the command line utility maxwait is available (it is is used to avoid hanging if the NFS server is not responding). The probe is done by trying a stat -f (system call statfs(2)) on the mount point. If that lasts longer then 2 seconds, then the server is considered to be not responding.

When you install the Linux agent manually, please do not forget to also install waitmax into /usr/bin. That file is shipped together with the agent. When waitmax is missing, the agent will silently omit the section nfsmounts.

If the NFS mount is "stale", then stat -f returns immediately but with a size of -1. The check detects that and results in a warning state.

Please note, that though this check outputs the current usage of the remote filesystem, no levels can be defined for the used space and no performance data is output. Please do a check for used space directly on the NFS server.

Item

The mount point.

Check parameters

None.

Performance data

This check does not provide performance data. The disk usage is assumedly measured on the file server itself. Duplicating that data on all clients would unneccessarily create redundant RRDs.

Inventory

All NFS mounts are found automatically. This is done by scanning /proc/mounts. The file /etc/fstab is irrelevant.

Configuration variables

None.