Nagios Support Forum

We are getting warning messages from check_local_disk when we should NOT be, as I have been checking the linux server disk usage with df -h:
[root@ourserver etc]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_livm37-lv_root 11T 435G 9.8T 5% /
tmpfs 253G 0 253G 0% /dev/shm
/dev/sda1

The check_local_disk is returning warning message:
[1393909200] CURRENT SERVICE STATE: ourserver.com;Root Partition;OK;HARD;1;DISK OK - free space: / 124402 MB (26% inode=99%):

The above two do not match.

Here is the setting in minimal.cfg:
# Define a service to check the disk space of the root partition
# on the local machine. Warning if < 20% free, critical if
# < 10% free space on partition.
#
define service{
use generic-service ; Name of service template to use
host_name ourserver.com

service_description Root Partition
is_volatile 0
check_period 24x7
max_check_attempts 4
normal_check_interval 5
retry_check_interval 1
contact_groups admins
notification_options w,u,c,r
notification_interval 960
notification_period 24x7
check_command check_local_disk!20%!10%!/
}

Also see attached screen shot of our Nagios GUI warning message for this server.

So what am I doing wrong in getting these warning messages when I should not be getting them?

Is there another configuration file that needs to be set?

Please help.

What plugin and how is the check_local_disk command defined? Is this actually a local disk check or something via snmp or similar?

We are using Nagios 3.2.3

We have Nagios installed on its own server and we are monitoring many other servers remotely from the Nagios server.

Here is the check_local_disk definition:
# 'check_local_disk' command definition
define command{
command_name check_local_disk
command_line $USER1$/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
}

That check_local_disk command, is only checking the local nagios system, was that your intention?

Are you sure the df output is correct? (253gb)!!?
Could you run the check with max verbosity and post the output:

You are correct sreinhardt!!! I just checked the local system warning message (less than 20% disk space) matches when I run df -h on the local machine! Well this is not our intention. We want monitor all the remote servers listed in the host_name field of the minimal.cfg file, here is the define service we have for the remote servers we want to monitor (see attached for the complete minimal.cfg):

# Define a service to check the disk space of the root partition
# on the local machine. Warning if < 20% free, critical if < 10% free space on partition.
define service{
use generic-service ; Name of service template to use
host_name nshserver.livm.net, pegasus.livm.net, pegasus2.livm.net, medcomp.livm.net, nattis.livm.net, scan.livm.net, liesc.livm.net, liescDR.livm.net, leps.livm.net,
liasc.livm.net, liascDR.livm.net

service_description Root Partition
is_volatile 0
check_period 24x7
max_check_attempts 4
normal_check_interval 5
retry_check_interval 1
contact_groups admins
notification_options w,u,c,r
notification_interval 960
notification_period 24x7
check_command check_local_disk!20%!10%!/
}

So what do I have to configure in order to monitor our remote machines as listed in the host_name field above?

You would want to either configure those systems with a remote agent to execute plugins and return values for the remote systems, such as NCPA. Otherwise you would need to setup snmp and snmp checks, or use check_by_ssh to exectute them remotely instead of using a agent running as a daemon on the remote systems. Once you decide how you would like to do this, then we can work on setting up config options from there.