check_disk '/sys not accessable'

Claudio Kuenzler ck at claudiokuenzler.com
Thu Mar 15 16:44:15 CET 2012
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Hey Timothy,

By reading some old mails in the mailing list, I stumbled over a topic
similar to your case from 2011-12-09 (SELinux and RHEL6.2 preventing disk
checks via NRPE). I know you said you didn't use SELinux, but I think it
doesn't hurt if you read it in the archive:
http://sourceforge.net/mailarchive/forum.php?thread_name=15tzkf1x503.fsf%40tux.uio.no&forum_name=nagios-users



On Tue, Mar 13, 2012 at 9:03 AM, Wenig, Michael (IT/I4Z) <
michael.wenig at ww-informatik.de> wrote:

> We had some similar issues which were originated in missing policies for
> SELinux.
>
> -----Ursprüngliche Nachricht-----
> Von: Boyer, Timothy A. [mailto:Timothy.Boyer at opm.gov]
> Gesendet: Montag, 12. März 2012 20:57
> An: Nagios Users List
> Betreff: Re: [Nagios-users] check_disk '/sys not accessable'
>
> Works fine on all of the other RHEL6 systems.
>
> # su - nagios
> -bash-4.1$ /usr/lib64/nagios/plugins/check_nrpe -H system3 -c
> check_all_disk 20 10 DISK OK - free space: / 24673 MB (98% inode=99%);
> /dev/shm 12007 MB (100% inode=99%); /boot 154 MB (65% inode=99%);
>
> ... with nothing at all in sudoers.
>
>
> -----Original Message-----
> From: davor grgicevic [mailto:dgrgicevic at gmail.com]
> Sent: Monday, March 12, 2012 1:32 PM
> To: Nagios Users List
> Subject: Re: [Nagios-users] check_disk '/sys not accessable'
>
> Hi  Timothy
>
> localy  u r workiong  as  root..  if  you  try  as  user Nagios, it wont
>  work ..
>
> u  have to  run sudo for  this
>
> "DISK CRITICAL - /dev/pts is not accessible: Permission denied"
>
> davor
>
>
>
> On Mon, Mar 12, 2012 at 6:17 PM, Boyer, Timothy A.
> <Timothy.Boyer at opm.gov> wrote:
> > $ ./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>
> > wrote:
> >
> > It's Permissive, so that can't be it.  Thanks...
> >
> >
> > -----Original Message-----
> > From: Sigmund Brandstaetter [mailto:sb at maniladev.com]
> > Sent: Thursday, March 08, 2012 4:12 PM
> > To: 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
> >> 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
> > 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
> > 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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> > Nagios-users mailing list
> > 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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> The most comprehensive online learning library for Microsoft developers is
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> 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
>
> ------------------------------------------------------------------------------
> Try before you buy = See our experts in action!
> The most comprehensive online learning library for Microsoft developers is
> just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro
> Style Apps, more. Free future releases when you subscribe now!
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> _______________________________________________
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> 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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