Getting graphs for one host, but not another... but both in same hostgroup

[Andrew Davis]

  I've stumbled across something odd. We're using Nagios and PNP4Nagios 
to get trending and graphs. I have two clients in the same hostgroup. 
The hostgroup name is "linux-servers". Members are "osiris1" and 
"imhotep". I'm using NRPE to check each. Relevant config files are 
below. In a nutshell, I'm getting disk graphs for Osiris1, but not for 
Imhotep and I can't figure out why. To clarify... the disk graphs are 
there for both. However, for host Osiris1 they are populated with data. 
But for host Imhotep they are blank (not non-existent, existent, but 
blank/empty). Checking manually at the command line of the Nagios server 
shows the pipe and the subsequent data (tests at bottm of email). I 
could understand if was monitoring the hosts individually and had a typo 
in a config for one, but I'm monitoring them as a hostgroup and command 
line tests work, but one is giving graphs with results and the other 
blank graphs. Any thoughts?

*hosts.cfg* (/relevant portion/):

##### Linux Hosts #####
# -- Linux host
define host {
         name                    Linux-Servers
         register                0

         hostgroups              linux-servers
         check_command           check-host-alive
         icon_image              tux.png
         statusmap_image         tux.png
         icon_image_alt          Linux Server
         max_check_attempts      3
         check_period            24x7
         contact_groups          unixadmins
         notification_interval   120
         notification_period     24x7
         notification_options    d, u, r, f, s
}
define host {
         host_name               imhotep
         use                     Linux-Servers
         alias                   Imhotep (SLES)
         address                 10.1.1.57
         parents                 *changed_for_security_reasons*
}
define host {
         host_name               osiris1
         use                     Linux-Servers
         alias                   Osiris1 (SLES)
         address                 10.1.1.52
         parents                 *changed_for_security_reasons*
}

*hostgroups.cfg* (/relevant portion/):

##### Linux Servers #####
define hostgroup {
         hostgroup_name          linux-servers
         alias                   Linux Servers (Checked via NRPE)
         members                 imhotep, osiris1
}

*checkcommands.cfg* (/relevant portion/):

define command {
         command_name            check_nrpe
         command_line            $USER1$/check_nrpe -H $HOSTADDRESS$ -t 
60 -c $ARG1$
}

*services.cfg* (/relevant portion/):

define service {
         hostgroup_name                  linux-servers
         service_description             DISK
         check_command                   check_nrpe!check_disks
         max_check_attempts              3
         normal_check_interval           15
         retry_check_interval            5
         check_period                    24x7
         notification_interval           120
         notification_period             24x7
         notification_options            w, u, c, r, f, s
         contact_groups                  unixadmins
         action_url                      
/nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$
}

Manual tests from Nagios command line:

[nagios at nephilim ]$ /usr/local/nagios/libexec/check_nrpe -H imhotep -c 
check_disks
DISK OK| /=37431MB;62067;65515;0;68964 /dev/shm=0MB;7187;7586;0;7986 
/srv=487666MB;857825;905482;0;953139 
/Process=771063MB;1151634;1215614;0;1279594 
/home=484743MB;974463;1028600;0;1082737 
/mnt/store=906386MB;1715990;1811323;0;1906656 
/data=397590MB;837857;884405;0;930953 
/mnt/archives=2715115MB;4618679;4875272;0;5131866
[nagios at nephilim ]$ /usr/local/nagios/libexec/check_nrpe -H osiris1 -c 
check_disks
DISK OK| /=5753MB;62067;65515;0;68964 /dev/shm=0MB;7013;7403;0;7793 
/mnt/store=906386MB;1715990;1811323;0;1906656 
/mnt/newxray=651767MB;837621;884155;0;930690 
/mnt/incell=1503651MB;1715990;1811323;0;1906656 
/mnt/newdata=788776MB;878368;927166;0;975965 
/share=560786MB;851256;898548;0;945840 
/data=397590MB;837857;884405;0;930953 
/home=484743MB;974463;1028600;0;1082737 
/mnt/archives=2715115MB;4618679;4875272;0;5131866 
/Peptide=452914MB;844445;891359;0;938273

Any thoughts? I'm stumped on this one... anyone know where PNP keeps its 
logs? I'm thinking I might be able to grep through the logs for the host 
with the blank graphs and find something...

-- 


   A. Davis
   Email:     nccomp at gmail.com

   "There is no limit to what a man can accomplish
    if he doesn't care who gets the credit." - Ronald Reagan

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