Nagios Support Forum

Posted: **Wed Mar 06, 2013 3:10 pm**

lets rule out db corruption, and run the following

/usr/local/nagiosxi/scripts/repairmysql.sh nagios

then for good measure, run

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service ndo2db stop
service nagios stop
killall -9 ndo2db
killall -9 nagios
service ndo2db start
service nagios start

Posted: **Thu Mar 07, 2013 9:11 am**

I did as suggested and I'm still running out of space on my ramdisk on both machines. One is set to 50MB while the new one is set to 75MB.

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[root@nagiosxivm ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      108G   49G   55G  48% /
tmpfs                 7.4G     0  7.4G   0% /dev/shm
/dev/sda1              97M   82M   11M  89% /boot
tmpfs                  50M     -     -   -  /var/nagiosramdisk

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[root@LNTTAVMNAG1 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00_ROOT
                       48G   17G   28G  38% /
/dev/mapper/VolGroup00-LogVol00
                      2.9G   69M  2.7G   3% /tmp
/dev/mapper/VolGroup00-LogVol00_VAR
                      4.8G  3.1G  1.5G  68% /var
/dev/hda1             190M   47M  134M  26% /boot
tmpfs                 2.0G     0  2.0G   0% /dev/shm
tmpfs                  75M   75M     0 100% /var/nagiosramdisk
10.100.3.220:/kickstart
                      190G  110G   70G  62% /kickstart

From what I've been able to find, a reboot is the only thing that fixes it. I have tried stopping and starting nagios, npcd, ndo2db, mysqld without luck. I just tried restarting httpd and it appears to have cleared the file.

Somehow, the data is being written but not cleared. When I restart and check the services that are showing down, I can see them just fine. The closer the ramdisk gets to being full, the more likely I am to click on services and/or hosts that are down and get the screen that says nothing is down.

This is rendering both Nagios installs useless at this point.

I decided to take a look at the commands for process-host-perfdata-* & process-service-perfdata-* after reading this post: Nagios Performance Tuning - Tech Tiops: Understanding Disk I/O
A number of these were still pointing to the /usr/local/nagios/var/* files. The documentation only shows to update the process-*-perfdata-file-bulk files to point to the ramdisk.

I've let the new system run like this for about an hour now and it seems that the service-perfdata file has stabalized at 44K and host-perfdata at 11k.

On a separate note, I think I figured out the issue on my new system with the Home link being different from the Tactical Overview link. When I imported the backup, I'm guessing that it kept the links pointing to the old server and didn't update it with the new one. This might be a bug?

Posted: **Thu Mar 07, 2013 2:53 pm**

I would go through each of the items in
http://library.nagios.com/library/produ ... n-nagiosxi

and make sure all have been modified and with the correct path.

Also, if you run the following it may give a clue to what is causing the ram disk to fill

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ll /var/nagiosramdisk/spool/perfdata|wc -l
ll /var/nagiosramdisk/spool/xidpe|wc -l

Posted: **Thu Mar 07, 2013 3:03 pm**

scottwilkerson wrote:I would go through each of the items in
http://library.nagios.com/library/produ ... n-nagiosxi

and make sure all have been modified and with the correct path.

Also, if you run the following it may give a clue to what is causing the ram disk to fill
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ll /var/nagiosramdisk/spool/perfdata|wc -l
ll /var/nagiosramdisk/spool/xidpe|wc -l

I have, multiple times.

The documentation only has the following:

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Additionally, the following command definitions will need to be updated in the Nagios XI->Core Config Manager->Commands. 
 command_name process-host-perfdata-file-bulk
 command_line /bin/mv /var/nagiosramdisk/host-perfdata /var/nagiosramdisk/spool/xidpe/$TIMET$.perfdata.host
 command_name process-service-perfdata-file-bulk
 command_line /bin/mv /var/nagiosramdisk/service-perfdata /var/nagiosramdisk/spool/xidpe/$TIMET$.perfdata.service

It doesn't touch on any of the other commands:

process-host-perfdata-file-pnp-bulk
process-host-perfdata
process-service-perfdata-file-pnp-bulk
process-service-perfdata

It wasn't until I changed these as well to point to the new folder (/var/nagiosramdisk) that the issue was corrected. None of these is mentioned anywhere in the how-to document.

Posted: **Thu Mar 07, 2013 5:43 pm**

Hey jbennett,

Can you submit a ticket to [email protected]? This way our team can work more hand in hand over this and take a look at your system via a remote session if it is needed, being that this issue is still occurring and impacting your monitoring environment so heavily.

Posted: **Fri Mar 08, 2013 8:30 am**

slansing wrote:Hey jbennett,

Can you submit a ticket to [email protected]? This way our team can work more hand in hand over this and take a look at your system via a remote session if it is needed, being that this issue is still occurring and impacting your monitoring environment so heavily.

Thank you for the offer.

However, this is not necessary as I have stated everything is corrected.

The only reason for a ticket would be to inform whoever does documentation that the documentation for utilizing a ramdisk doesn't include all of the necessary changes to commands.

Also, that when migrating data, links still point to old servers and aren't updated on the new server.

Posted: **Fri Mar 08, 2013 1:48 pm**

We will look into correcting the documentation. Thank you for the info and clear descriptions!

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