I'm trying to setup NRPE with a basic example as a first step towards deploying it. For simplicity, I'm running both NRPE and Nagios locally. NRPE and Nagios both seem to be working, but using check_nrpe from Nagios fails mysteriously. Edit: I'm using version 4.1.1 of Nagios and 2.15 of NRPE.
I think that NRPE is working because I can run check_nrpe manually:
/s/l/n/nagios_instance ❯❯❯ libexec/check_nrpe -H 127.0.0.1 -p 5667 -c check_total_procs ⏎
PROCS CRITICAL: 536 processes | procs=536;150;200;0;
I think that Nagios is working (and supplying correct arguments) because I have written this simple check in python, file named check_hello_world.py that lives in the libexec directory:
#!/usr/bin/env python
import sys
print str(sys.argv)
raise SystemExit, 2
The relevant lines of my nagios config look like this:
define host {
use linux-server
host_name yourhost
alias My first Apache server
address 127.0.0.1
}
define command {
command_name check_procs_nrpe
command_line $USER1$/check_hello_world.py –H "$HOSTADDRESS$" -p 5667 -c "check_total_procs"
#command_line $USER1$/check_nrpe –H "$HOSTADDRESS$" -p 5667 -c "check_total_procs"
}
define service {
use generic-service
host_name yourhost
service_description Check using the hello world plugin
check_command check_procs_nrpe
}
As you can see, I define the check_procs_nrpe command with one of two commands, either the simple python script, or the nrpe command to check procs that worked from the command line. When I use the python script, within a couple of minutes I get an email with text:
Additional Info:
[/spare/local/nagios/nagios_instance/libexec/check_hello_world.py, –H, 127.0.0.1, -p, 5667, -c, check_total_procs]
This seems to show that Nagios is working correctly, triggering alerts, sending emails, and correct resolving arguments. When I change the command to use check_nrpe and rerun Nagios, I get an email with text:
Additional Info:
Incorrect command line arguments supplied
I really don't know where to go next. I don't have root on this box and thus cannot easily reconfigure rsyslog to try to get logging information. Happy to provide additional info upon request. Any ideas?