NRPE: Unable to read output

[Jake Solid]

I did modified the nrpe.cfg to execute commands via sudo by adding the
following line:

*command[check_smartmon]=/usr/bin/sudo
/usr/lib64/nagios/plugins/check_smartmon  ata -d /dev/sda*

*Why I'm able to invoke the following plugins from the nagios server using
check_nrpe but when invoking check_smartmon  I get *NRPE: Unable to read
output*?*

command[check_users]=/usr/lib64/nagios/plugins/check_users -w 8 -c 10
command[check_load]=/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c
30,25,20
command[check_disk1]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
/dev/mapper/VolGroup00-LogVol00
command[check_disk2]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
/dev/mapper/VolGroup00-LogVol01
command[check_disk3]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
/dev/mapper/VolGroup00-LogVol02
command[check_disk4]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p
/dev/mapper/VolGroup01-LogVol00
command[check_md]=/usr/lib64/nagios/plugins/check_swraid
command[check_zombie_procs]=/usr/lib64/nagios/plugins/check_procs -w 5 -c 10
-s Z
command[check_total_procs]=/usr/lib64/nagios/plugins/check_procs -w 200 -c
300



On Tue, Aug 12, 2008 at 12:25 PM, <kyle.odonnell at gmail.com> wrote:

> executing check_nrpe via sudo will not accomplish what you want.  You
> will need to either modify the nrpe.cfg to execute commands via sudo,
> or write a wrapper for check_smartmon.  I am not familiar with that
> plugin, but you may also be able to edit it and prepend /path/to/sudo
> before it execs smartctl.
>
>
>
> On 8/12/08, Jake Solid <richardsolid at gmail.com> wrote:
> > I'm trying to use check_nrpe with check_smartmon but I'm getting NRPE:
> > Unable to read output at the Nagios Server. *All other check plugins like
> > check_load and check_procs work fine.
> > *
> > *I'm running the following command from my nagios server to the remote
> host:
> > *
> > *./check_nrpe -H remotehost.domain.com -c check_smartmon*
> >
> > *and the out put is the following:*
> > *NRPE: Unable to read output*
> >
> > *This is what the remote host logs display:*
> > *Aug 12 11:16:13 *remotehost* xinetd[7151]: START: nrpe pid=7986 from=
> > 198.162.1.1 <- Nagios Server IP Address
> > Aug 12 11:16:13 *remotehost* nrpe[7986]: INFO: SSL/TLS initialized. All
> > network traffic will be encrypted.
> > Aug 12 11:16:13 *remotehost* xinetd[7151]: EXIT: nrpe status=0 pid=7986
> > duration=0(sec)*
> >
> >
> > *When I use the check_smartmon directly in the remote machine as the user
> > nagios and using sudo it works fine:*
> > [nagios at remotehost plugins]$  sudo
> /usr/lib64/nagios/plugins/check_smartmon
> > ata -d /dev/sda
> > OK: device is functional and stable (temperature: 33)
> >
> > *If I change the only_from line on  /etc/xinetd.d/nrpe file to 127.0.0.1and
> > I run the following from the remote host I get prompted by a password:*
> > *[nagios at remotehost plugins]$ sudo /usr/lib64/nagios/plugins/check_nrpe
> -h
> > remotehost.domain.com.latpro.com -c check_smartmon
> > Password:
> > *
> > *The permissions on the device are the following:*
> > *[nagios at remotehost plugins]$ ls -lah /dev/sda
> > brw-rw---- 1 root disk 8, 0 Jan  8  2008 /dev/sda*
> >
> > *The disk group also has nagios:*
> > disk:x:6:root,nagios
> >
> >
> > *And again the other plugins work fine when they are invoked from the
> Nagios
> > server. Like the following:*
> > [nagios at nagios-server plugins]$ ./check_nrpe -H remotehost.domain.com -c
> > check_load
> > OK - load average: 2.14, 2.44, 2.72|load1=2.140;15.000;30.000;0;
> > load5=2.440;10.000;25.000;0; load15=2.720;5.000;20.000;0;
> >
> > *I added the following line on my remotehost to the /etc/sudoers:*
> > nagios    ALL=(ALL) NOPASSWD:
> >
> /usr/sbin/smartctl,/usr/lib64/nagios/plugins/check_nrpe,/usr/lib64/nagios/plugins/check_smartmon
> >
> > I also try running the NRPE as adeamon and not with xinetd and I had the
> > same issue.
> >
> > Any inputs?
> >
>
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