DISK CRITIKAL: No such file or directory

[stbender]

Hello,

I want to monitor an ubuntu server 12.04 installation with 3 disks.
Here's the disk configuration from "df":

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/dev/md1         78G    4,1G   70G    6% /
...
/dev/sdc1        19T     84G   18T    1% /mnt/images
/dev/sdc2       2,0T     30G  1,8T    2% /mnt/db

I set up theses Nagios services:

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define service{
        use                             generic-service
        host_name                       server
        service_description             Disk Space /
        check_command                   check_disk!20%!10%!/
        }

define service{
        use                             generic-service 
        host_name                       server
        service_description             Disk Space Images
        check_command                   check_disk!20%!10%!/mnt/images
        }

define service{
        use                             generic-service
        host_name                       server
        service_description             Disk Space DB
        check_command                   check_disk!20%!10%!/mnt/db
        }

The first service for "/" gives a correct status.
The other two services give me an error: "DISK CRITICAL - /mnt/db is not accessible: No such file or directory "

Am I doing something wrong?

Thank you!

Best regards,

Stephan

[agriffin]

Does the nagios user have read permissions on /mnt/db?

[stbender]

Hi,

well, I guess he does.

doing ls -la /mnt/ I get:

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drwxr-xr-x  4 root root 4096 Jun  1 16:47 db
drwxr-xr-x  4 pacs root 4096 Mai 31 16:44 images

So from "drwxr-xr-x" I assume every user has at least the read permission.

[agriffin]

How about read access to /mnt? Are you running anything like SELinux that might add additional restrictions on top of regular file permissions?

[stbender]

ok, there was a problem with the communication between nagios server and the nagios process on the side of the monitored system.

Thank you!

[agriffin]

Okay, glad you got everything working!

[matt_h2]

Hi all.

I have a similar issue to stbender above where all but one filesystem reports back fine. The one that doesn't reports the message:
DISK CRITICAL - XXXXX is not accessible: No such file or directory

I've checked to make sure the filesystem and directories are readable by everyone and I'm not running selinux.

I can run the following command locally on the monitoring server which reports back successfully:
/usr/local/nagios/libexec/check_nrpe -H NN.NN.NN.NN -c check_disk -a w20 c10 XXXXX
DISK OK - free space: XXXXX 23710 MB (99% inode=99%);| XXXXX=206MB;25197;25197;0;25197

Can anyone help and/or give me some ideas of things to check please?

Regards

Matt

[Box293]

Can you please show us the service definition and also the command definition this service uses.

[matt_h2]

Service definition:
define service{
use generic-service
host_name HHHHH
service_description Partition PPPPP
check_command check_nrpe_disk!20%!10%!PPPPP
}

Command definition:
define command{
command_name check_nrpe_disk
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -p5666 -c check_disk -a $ARG1$ $ARG2$ $ARG3$
}

Obviously where: HHHHH is our hostname and PPPPP is the mount point.

[Box293]

On your remote system, when you execute this locally what output does it produce?

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su nagios
/usr/local/nagios/libexec/check_disk -w w20% -c c10% PPPPP

Make sure this is executed as the user nagios.