Zabbix 1.4.4 NTP problem

[pasqu]

Hi all, I'm trying to test from zabbix agent one of my NTP in the network.
My key is net.tcp.service[ntp,192.168.0.10,] but zabbix say "not supported".

In the log I see:


27752:20080221:121935 Requested [net.tcp.service[ntp,192.168.0.10,]]
27752:20080221:121935 Sending back [ZBX_NOTSUPPORTED]


Anyone have some ideas?

Thanks Enrico.

[xs-]

I dont think net.tcp.service recognises NTP as a servicename (afaik the services list is hardcoded in the agent).
You should try using the portnumber.

Oh yeah, NTP usualy uses UDP
Also, i'd make a UserParameter in the agent config to actually check the ntp service (using ntpdate or something) so you can verify the response intead of a port open.

[Tenzer]

NTP is only using the UDP protocol, not TCP. You will have to use an external script in order to check if a NTP server is responding. I am using the following PHP script in order to do this:

#!/usr/bin/php
<?
    // Check for required parameters
    if($_SERVER[argv][1])
    {
            $ntp_server = $_SERVER[argv][1];
    } else {
            echo "You need to supply a NTP server to check. Quitting.\n";
            exit;
    }

    // Do query
    $query = exec("ntpdate -q -t 0.1 ".$ntp_server, $output, $return);

    if($return == 0)
    {
            echo "1\n";
    } else {
            echo "0\n";
    }
?>

The benefit of using a script like this, is that it also checks the stratum of the server. If it for instance is 16, then the script will fail.

[nwisrlit]

Simpler test for NTP

in /etc/zabbix/zabbix_agentd.conf, add the following line:

UserParameter=ntp.up,if ntpdate -q -t 0.1 localhost > /dev/null 2>&1 ; then echo 1 ; else echo 0 ; fi

Then add an "item" referring to "ntp.up" - it returns 1 if NTP is handing out times, 0 if it's not (stratum too high, daemon down, whatever)

Enjoy!