check_nrpe returning truncated performance data

[rajasegar]

Nagios XI 2014R1.2
nrpe v 2.15

We have an issue where the performance data is being truncated.
Please advice on options available to fix this issue.

Code: Select all

[nagios@nagiosprodxi1 libexec]$ ./check_nrpe -H 10.10.10.10 -c check_disk -a MB 30% 15% '/tmp' ' -e -A -x /cdrom -i /zones -i /platform/sun4v'
CRITICAL - /oravl11 >Tot:307200MB Used:286934MB(94%) Free:20265MB(6%), /oravl12 >Tot:307200MB Used:286934MB(94%) Free:20265MB(6%), /oravl13 >Tot:307200MB Used:286933MB(94%) Free:20266MB(6%), /oravl51 >Tot:307200MB Used:286947MB(94%) Free:20252MB(6%), /oravl52 >Tot:307200MB Used:286943MB(94%) Free:20256MB(6%), /oravl53 >Tot:307200MB Used:286942MB(94%) Free:20257MB(6%), /oravl54 >Tot:307200MB Used:286945MB(94%) Free:20254MB(6%), /oravl55 >Tot:307200MB Used:225447MB(74%) Free:81752MB(26%), /oravl56 >Tot:307200MB Used:225451MB(74%) Free:81748MB(26%),| /tmp=28MB;716;870;0;1024 /=32810MB;42356;51432;0;60509 /dev=32810MB;42356;51432;0;60509 /oravl00=4950MB;7168;8704;0;10240 /oravl01=6489MB;7168;8704;0;10240 /oravl02=862MB;7168;8704;0;10240 /oravl03=1063MB;7168;8704;0;10240 /oravl04=862MB;7168;8704;0;10240 /oravl05=862MB;7168;8704;0;10240 /oravl06=37113MB;71680;87040;0;102400 /oravl11=286934MB;215040;261120;0;307200 /oravl12=286934MB;215040;261120;0;307200 /oravl13=286933MB;215040;261120;0;307200 /oravl14=204947MB;2

Thanks

[Box293]

NRPE has a return limit of 1K by default.

There are some patches/mods out there that allow you to increase it but it means you need to re-compile NRPE at both ends

Personally for these situations I use check_by_ssh as it does not have limits on the amount of data that can be sent back.

[rajasegar]

NRPE has a return limit of 1K by default.

There are some patches/mods out there that allow you to increase it but it means you need to re-compile NRPE at both ends

Personally for these situations I use check_by_ssh as it does not have limits on the amount of data that can be sent back.

Recompiling is not an issue.
Can you please provide info on the mods?

Thanks

[Box293]

Have a read of this forum post.

http://support.nagios.com/forum/viewtop ... 34&t=25221

[rajasegar]

Have a read of this forum post.

http://support.nagios.com/forum/viewtop ... 34&t=25221

Ok, found the info required. Will try it out

Code: Select all

./include/common.h:#define MAX_INPUT_BUFFER     4096    /* max size of most buffers we use */
./include/common.h:#define MAX_PACKETBUFFER_LENGTH      4096            /* max amount of data we'll send in one query/response */
./contrib/nrpe_check_control.c:#define MAX_CHARS        4096

Thanks

[tmcdonald]

Let us know how this works out. I was personally interested in that thread and never got to see the end results, so I am curious to see if those changes work for anyone.

[rajasegar]

Confirmed working fine. I set the values to 8192.

Before

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nagios@unix-test-server:/usr/local/nagios/libexec$ ./check_nrpe.old -H localhost -c rs_test -a ""
CHECK_NRPE: Received 0 bytes from daemon.  Check the remote server logs for error messages.
nagios@unix-test-server:/usr/local/nagios/libexec$

After

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nagios@unix-test-server:/usr/local/nagios/libexec$ ./check_nrpe -H localhost -c rs_test -a ""
total 23867
-rwxr-xr-x   1 nagios   nagios    323324 May 19  2014 check_apt
-rwxr-xr-x   1 nagios   nagios      2256 May 19  2014 check_breeze
-rwxr-xr-x   1 nagios   nagios    159760 May 19  2014 check_by_ssh
lrwxrwxrwx   1 root     root           9 Jan 28 15:14 check_clamd -> check_tcp
....
.... snipped
....
-rw-r--r--   1 root     root           0 Feb  9 08:54 test.txt
-rwxr-xr-x   1 nagios   nagios    124008 May 19  2014 urlize
-rwxr-xr-x   1 nagios   nagios      1912 May 19  2014 utils.pm
-rwxr-xr-x   1 nagios   nagios      2791 May 19  2014 utils.sh
OK - dumped long listing

Need to change check_nrpe on the nagios server also. Have not done this yet.

[rajasegar]

--WARNING ----

The newly compiled nrpe and check_nrpe only works with similarly compiled check_nrpe in the Nagios server.
The new check_nrpe does not work with the stock agents anymore and returns the following error.

Code: Select all

CHECK_NRPE: Received 0 bytes from daemon.  Check the remote server logs for error messages.

Anybody know how to fix this so that this new version can work for both new and modified agents?

Please take note and rename accordingly.

[Box293]

As a work around, name the newly compiled check_nrpe as check_nrpe_larger
Then create a new command defition that uses this check_nrpe_larger plugin
Then modify the services you require to use this modified command.

I tried what you were after and this was one of the reasons why I decided to use check_by_ssh.

[rajasegar]

As a work around, name the newly compiled check_nrpe as check_nrpe_larger
Then create a new command defition that uses this check_nrpe_larger plugin
Then modify the services you require to use this modified command.

I tried what you were after and this was one of the reasons why I decided to use check_by_ssh.

Yeah. This is what I did.
Change to check_by_ssh needs proper testing so I am using this as a temp measure.