check_disk '/sys not accessable'

[Boyer, Timothy A.]

$ ./check_disk -w 10% -c 5% -p /sys
DISK UNKNOWN - free space:|

is the result on both servers.

But that's running locally, which works.  The problem is when running via nrpe.

Running check_nrpe with -x /sys in the command line returns:

DISK CRITICAL - /dev/pts is not accessible: Permission denied

Doing the next obvious thing and including /dev in the excludes works, and is a workaround.

Thanks much...


From: Claudio Kuenzler [mailto:ck at claudiokuenzler.com]
Sent: Friday, March 09, 2012 7:46 AM
To: Nagios Users List
Subject: Re: [Nagios-users] check_disk '/sys not accessable'

Nagios 3.3.1.  Two identical RHEL6.1 systems, and all I'm trying to do is get a total disk space reading.

Well the systems are not identical as the manually launched plugin output of yours shows:
[nagios at server1 ~)$ /usr/lib/nagios/plugins/check_disk -w20% -c10%
DISK OK - free space: / 24673 MB (98% inode=99%); /dev/shm 12007 MB (100% inode=99%); /boot 154 MB (65% inode=99%); /home 7507 MB (98% inode=99%);

[nagios at server2 /]$ /usr/lib/nagios/plugins/check_disk -w20% -c10%
DISK OK - free space: / 22004 MB (77% inode=96%); /dev/shm 498 MB (100% inode=99%); /boot 387 MB (84% inode=99%);

Note the /home mount point.

Have you checked the servers for the different mount points? It looks like on server2 /sys is seen as a partition or mount point while on server1 the check seems to "ignore" it successfully? Any idea why server2 thinks /sys is a partition or mount point?

Can you try to launch it specifically on /sys and output the results (on both servers)?

./check_disk -w 10% -c 5% -p /sys

Then try to exclude /sys from the check:

./check_disk -w 10% -c 5% -x /sys

By the way the error you're seeing seems to be triggered from this code (at the bottom of the source file):

void
stat_path (struct parameter_list *p)
{
  /* Stat entry to check that dir exists and is accessible */
  if (verbose >= 3)
    printf("calling stat on %s\n", p->name);
  if (stat (p->name, &stat_buf[0])) {
    if (verbose >= 3)
      printf("stat failed on %s\n", p->name);
    printf("DISK %s - ", _("CRITICAL"));
    die (STATE_CRITICAL, _("%s %s: %s\n"), p->name, _("is not accessible"), strerror(errno));
  }
}


On Fri, Mar 9, 2012 at 1:16 PM, Boyer, Timothy A. <Timothy.Boyer at opm.gov<mailto:Timothy.Boyer at opm.gov>> wrote:
It's Permissive, so that can't be it.  Thanks...

-----Original Message-----
From: Sigmund Brandstaetter [mailto:sb at maniladev.com<mailto:sb at maniladev.com>]
Sent: Thursday, March 08, 2012 4:12 PM
To: nagios-users at lists.sourceforge.net<mailto:nagios-users at lists.sourceforge.net>
Subject: Re: [Nagios-users] check_disk '/sys not accessable'

Tim,

How about SELinux, is it maybe on only on the one that is making the
problem?

Cheers
Sigmund



On 3/9/2012 00:49, Boyer, Timothy A. wrote:
> Nagios 3.3.1. Two identical RHEL6.1 systems, and all I'm trying to do
> is get a total disk space reading. So nrpe is running on both, with
> the identical command in nrpe.cfg:
> command[check_all_disk]=/usr/lib/nagios/plugins/check_disk -w $ARG1$
> -c $ARG2$
> command[check_all_disk]=/usr/lib/nagios/plugins/check_disk -w $ARG1$
> -c $ARG2$
> Running as user nagios from the central server.
> One works fine:
> -sh-4.1$ /usr/lib/nagios/plugins/check_nrpe -H server1 -c
> check_all_disk -a 20% 10%
> DISK OK - free space: / 24673 MB (98% inode=99%); /dev/shm 12007 MB
> (100% inode=99%); /boot 154 MB (65% inode=99%); /home 7507 MB (98%
> inode=99%);
> the other gives me this:
> -sh-4.1$ /usr/lib/nagios/plugins/check_nrpe -H server2 -c
> check_all_disk -a 20% 10%
> DISK CRITICAL - /sys is not accessible: Permission denied
> Identical versions of nrpe (2.12); a diff on check_disk shows they're
> both identical; both commands work correctly locally run as user Nagios:
> [nagios at server1 ~)$ /usr/lib/nagios/plugins/check_disk -w20% -c10%
> DISK OK - free space: / 24673 MB (98% inode=99%); /dev/shm 12007 MB
> (100% inode=99%); /boot 154 MB (65% inode=99%); /home 7507 MB (98%
> inode=99%);
> [nagios at server2 /]$ /usr/lib/nagios/plugins/check_disk -w20% -c10%
> DISK OK - free space: / 22004 MB (77% inode=96%); /dev/shm 498 MB
> (100% inode=99%); /boot 387 MB (84% inode=99%);
> Multiple other nrpe commands running on both; this is the only thing
> they're having problems with.
> /sys is user-readable in both. Logs show nothing.
> I've run out of ideas. Pointers in the right direction appreciated...
> Tim
>
>
> ------------------------------------------------------------------------------
> Virtualization&  Cloud Management Using Capacity Planning
> Cloud computing makes use of virtualization - but cloud computing
> also focuses on allowing computing to be delivered as a service.
> http://www.accelacomm.com/jaw/sfnl/114/51521223/
>
>
> _______________________________________________
> Nagios-users mailing list
> Nagios-users at lists.sourceforge.net<mailto:Nagios-users at lists.sourceforge.net>
> https://lists.sourceforge.net/lists/listinfo/nagios-users
> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue.
> ::: Messages without supporting info will risk being sent to /dev/null


--
---------------------
Sigmund Brandstaetter
Check my Blog
Live from Manila
http://maniladev.com
---------------------


------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net<mailto:Nagios-users at lists.sourceforge.net>
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue.
::: Messages without supporting info will risk being sent to /dev/null

------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net<mailto:Nagios-users at lists.sourceforge.net>
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue.
::: Messages without supporting info will risk being sent to /dev/null

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