Nagios Support Forum

Hi

I am using nagios core 4.0.7 and I want to monitor mysql database but facing some problem

My client is running centos 6.5 and nrep.cfgconfig file is like this
command[check_root]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
command[check_var]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /var
command[check_home]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /home
#command[check_mysql]=/usr/local/nagios/libexec/check_mysql -d mysql -H localhost -u root -p testpass
command[check_mysql]=/usr/local/nagios/libexec/check_mysqld.pl

I have download check_mysqld.pl plugin from nagios plugin site and it working ok.
from client if run this command

[root@Titan libexec]# su - nagios
[nagios@Titan libexec]$ ls -l check_my*
-rwxr-xr-x 1 nagios nagios 183655 Jun 5 16:14 check_mysql
-rwxr-xr-x 1 nagios nagios 35326 Jun 13 22:33 check_mysqld.pl
-rwxr-xr-x 1 nagios nagios 170101 Jun 5 16:14 check_mysql_query
[nagios@Titan libexec]$ ./check_mysqld.pl
MYSQL 5.1.73 OK
[nagios@Titan libexec]$
[nagios@Titan libexec]$ /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1 -c check_mysql
MYSQL 5.1.73 OK
[nagios@Titan libexec]$

My core server files are like this

server host.cfg file
define service{
use local-service ; Name of service template to use
host_name titan
service_description Root Partition
check_command check_nrpe!check_root
}

define service{
use generic-service ; Name of service template to use
host_name titan
service_description Mysql Database Status
check_command check_nrpe!check_mysql

server commands.cfg file
define command{
command_name check_nrpe
command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

When I run command from server to client, output showing ok but monitoring showing error "NRPE: Command 'check_mysql' not "

[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_nrpe -H 10.128.28.222 -c check_mysql
MYSQL 5.1.73 OK
[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_nrpe -H 10.128.28.222 -c check_root
DISK OK - free space: / 2847 MB (60% inode=81%);| /=1824MB;3936;4428;0;4921

Root file system monitored without any problem only problem with mysql database.

My nagios core debugging logs out put

[1402739016.570360] [2048.1] [pid=30082] **** BEGIN MACRO PROCESSING ***********
[1402739016.570365] [2048.1] [pid=30082] Processing: '/usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$'
[1402739016.570379] [2048.1] [pid=30082] Done. Final output: '/usr/local/nagios/libexec/check_nrpe -H 10.128.156.122 -c check_mysql'
[1402739016.570386] [2048.1] [pid=30082] **** END MACRO PROCESSING *************
[1402739016.570394] [064.1] [pid=30082] Making callbacks (type 6)...
[1402739016.570410] [001.0] [pid=30082] macros_to_kvv()
[1402739016.570455] [001.0] [pid=30082] clear_volatile_macros_r()
[1402739016.570466] [001.0] [pid=30082] handle_timed_event() end
[1402739016.570473] [064.1] [pid=30082] Making callbacks (type 1)...
[1402739016.570481] [008.1] [pid=30082] ** Event Check Loop
[1402739016.570496] [008.1] [pid=30082] Next Event Time: Sat Jun 14 10:43:39 2014
[1402739016.570503] [008.1] [pid=30082] Current/Max Service Checks: 1/0 (inf% saturation)
[1402739016.570511] [12288.1] [pid=30082] ## Polling 1500ms; sockets=14; events=50; iobs=0xbc4140
[1402739016.585474] [001.0] [pid=30082] handle_async_service_check_result()
[1402739016.585503] [016.0] [pid=30082] ** Handling check result for service 'Mysql Database Status' on host 'titan' from 'Core Worker 30092'...
[1402739016.585512] [016.1] [pid=30082] HOST: titan, SERVICE: Mysql Database Status, CHECK TYPE: Active, OPTIONS: 0, SCHEDULED: Yes, RESCHEDULE: Yes, EXITED OK: Yes, RETURN CODE: 2, OUTPUT: NRPE: Command 'check_mysql' not defined

[1402739016.585527] [001.0] [pid=30082] get_service_check_return_code()
[1402739016.585534] [016.1] [pid=30082] Service is in a non-OK state!
[1402739016.585540] [016.1] [pid=30082] Host is currently UP, so we'll recheck its state to make sure...
[1402739016.585546] [001.0] [pid=30082] schedule_host_check()
[1402739016.585566] [016.0] [pid=30082] Scheduling a non-forced, active check of host 'titan' @ Sat Jun 14 10:43:36 2014

Thanks

Sanjay

Hi Sanjay

Did you restart nrpe daemon on client side after updating nrpe.cfg file.

Soooo.... what exactly is the problem? Can you post the output that the service is showing you in the Nagios Web UI? Also, as asked above, did you properly restart the remote host's nrpe after the changes were made?