Help please - test works fine EXCEPT over NRPE???
Andrew Davis
nccomp at gmail.com
Fri Apr 3 00:08:31 CEST 2009
I've checked /etc/sudoers, /etc/nagios/nrpe.cfg, /etc/xinetd.d/nrpe, and
the script itself (/usr/local/nagios/libexec/check_logs.pl) and none
have any "tty" strings in them for me to comment out.
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
Lei Chen wrote:
> use visudo command, comment the following line:
> Defaults requiretty
>
> and try again.
>
>
> 2009/4/2 Andrew Davis <nccomp at gmail.com>:
>
>> Its running under xinetd, so 'ps aux|grep nrpe' isn't showing the true user.
>> However, the nrpe.cfg is set to use the nobody user. I've added the nobody
>> user to sudo, and even tried it as the nagios user. What I see now from the
>> server is:
>>
>> /usr/local/nagios/libexec/check_nrpe -H atum -c check_logs
>> CHECK_NRPE: Socket timeout after 10 seconds.
>>
>> And in the messages file on the client:
>>
>> Apr 1 22:54:25 atum nrpe[25661]: Running command: /usr/bin/sudo
>> /usr/local/nagios/libexec/check_logs.pl -c /etc/nagios/check_logs_linux.cfg
>> Apr 1 22:54:25 atum /usr/bin/sudo: nobody : TTY=unknown ; PWD=/ ;
>> USER=root ; COMMAND=/usr/local/nagios/libexec/check_logs.pl -c
>> /etc/nagios/check_logs_linux.cfg
>>
>> 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
>>
>>
>> John Stile wrote:
>>
>> On the client, if you look at 'ps aux |grep nrpe'
>> what user does nrpe run as?
>>
>> You might have to configure sudo to allow that user to run the plugin.
>>
>>
>> On Wed, 2009-04-01 at 18:27 -0400, Andrew Davis wrote:
>>
>>
>> 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: 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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>>
>>
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>
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