I setup the "check_logs.pl"
(http://www.nagiosexchange.org/cgi-bin/page.cgi?g=Detailed%2F1752.html;d=1)
test and its config file on some local Linux servers tested via NRPE.
All other NRPE tests work fine (including some custom ones). The
check_logs.pl works fine locally, but fails over NRPE. I've enabled
debugging in NRPE, but its not telling me much more...
Client local test:
atum:/etc/init.d # /usr/local/nagios/libexec/check_logs.pl -c
/etc/nagios/check_logs_linux.cfg
faillog => OK; lastlog => OK; messages => OK; wtmp => OK;
Server test to client via NRPE:
/usr/local/nagios/libexec/check_nrpe -H atum -c check_logs
CHECK_NRPE: No output returned from daemon.
Local log (/var/log/messages) on client when test is run from server:
Apr 1 18:05:52 atum nrpe[1412]: Added
command[check_logs]=/usr/local/nagios/libexec/check_logs.pl -c
/etc/nagios/check_logs_linux.cfg
Apr 1 18:05:52 atum nrpe[1412]: INFO: SSL/TLS initialized. All
network traffic will be encrypted.
Apr 1 18:05:52 atum nrpe[1412]: Handling the connection...
Apr 1 18:05:52 atum nrpe[1412]: Host is asking for command
'check_logs' to be run...
Apr 1 18:05:52 atum nrpe[1412]: Running command:
/usr/local/nagios/libexec/check_logs.pl -c
/etc/nagios/check_logs_linux.cfg
Apr 1 18:05:52 atum nrpe[1412]: Command completed with return code
0 and output:
Apr 1 18:05:52 atum nrpe[1412]: Return Code: 0, Output:
The response is immediate, so its not a timeout issue. Other NRPE tests
work fine:
/usr/local/nagios/libexec/check_nrpe -H atum -c check_load
OK - load average: 0.00, 0.00, 0.00|load1=0.000;5.000;10.000;0;
load5=0.000;5.000;10.000;0; load15=0.000;5.000;10.000;0;
/usr/local/nagios/libexec/check_nrpe -H atum -c check_memory
CHECK_MEMORY OK - 1702M free |
free=1785552896b;210236620.8:;105118310.4:
And on the client:
Apr 1 18:09:25 atum nrpe[1799]: INFO: SSL/TLS initialized. All
network traffic will be encrypted.
Apr 1 18:09:25 atum nrpe[1799]: Handling the connection...
Apr 1 18:09:25 atum nrpe[1799]: Host is asking for command
'check_load' to be run...
Apr 1 18:09:25 atum nrpe[1799]: Running command:
/usr/local/nagios/libexec/check_load -r -w 5.0 -c 10.0
Apr 1 18:09:25 atum nrpe[1799]: Command completed with return code
0 and output: OK - load average: 0.00, 0.00,
0.00|load1=0.000;5.000;10.000;0; load5=0.000;5.000;10.000;0;
load15=0.000;5.000;10.000;0;
Apr 1 18:09:25 atum nrpe[1799]: Return Code: 0, Output: OK - load
average: 0.00, 0.00, 0.00|load1=0.000;5.000;10.000;0;
load5=0.000;5.000;10.000;0; load15=0.000;5.000;10.000;0;
Apr 1 18:09:26 atum nrpe[1802]: INFO: SSL/TLS initialized. All
network traffic will be encrypted.
Apr 1 18:09:26 atum nrpe[1802]: Handling the connection...
Apr 1 18:09:26 atum nrpe[1802]: Host is asking for command
'check_memory' to be run...
Apr 1 18:09:26 atum nrpe[1802]: Running command:
/usr/local/nagios/libexec/check_memory.pl -w 10% -c 5%
Apr 1 18:09:26 atum nrpe[1802]: Command completed with return code
0 and output: CHECK_MEMORY OK - 1703M free |
free=1786134528b;210236620.8:;105118310.4:
Apr 1 18:09:26 atum nrpe[1802]: Return Code: 0, Output:
CHECK_MEMORY OK - 1703M free |
free=1786134528b;210236620.8:;105118310.4:
Here's the local command in my /etc/nagios/nrpe.cfg:
command[check_logs]=/usr/local/nagios/libexec/check_logs.pl -c
/etc/nagios/check_logs_linux.cfg
And on the server (when done in services.cfg, though its failing with
manual tests too):
define service {
hostgroup_name linux-servers
service_description LOGS
check_command check_nrpe!check_logs
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
}
Considering it fails with a manual test (command line), I doubt its my
services.cfg entry. It runs fine when called locally, so I'm thinking it
could be an issue on the client in the nrpe.cfg, but if so I can't find
it...
I *do* see the obvious... namely, the other two tests that run over NRPE
have something after "Output:" and the check_logs.pl does not. However,
called at the command line it does... which is what stumps me.
What would cause the test to run fine locally, but return nothing when
called via NRPE??? (BTW: I'm running 3.x with the latest set of plugins
and NRPE).
One more thing: I know *someone* is going to ask why I don't just use
the built-in check_log test. The answer is that check_logs.pl allows for
multiple files and pattern matches and a "seek" file to speed things up.
--
A. Davis
Email: [email protected]
"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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