Zabbix Stuff

README.md

DNS Test

This requires config for zabbix agent as well as the dnstest.php script somewhere on the path, for example /usr/local/bin/dnstest.php.

Content for /etc/zabbix/zabbix_agent.d/userparameter_dnstest.conf

UserParameter=dns.ping[*],dnstest.php $1 $2

dnstest.php

#!/usr/bin/php
<?php
  //This file should be used together with userparameters in zabbix
  //to test if there is a valid response from a DNS server
  //first parameter is the dns server
  //second parameter is the address to resolve
  
  // Define defaults
    $result=0;
 
   if(count($_SERVER["argv"]) > 1 and $_SERVER["argv"][1]) {
        $ns_server = $_SERVER["argv"][1];
    } 
    else {
        echo "You need to supply a DNS server to check. Quitting.\n";
        exit;
    }

    if(count($_SERVER["argv"]) < 3) {
        echo "You need to supply at least 1 host to check. Quitting.\n";
        exit;
    }
   
    $hosts = array_slice($_SERVER["argv"], 2);
   
    // Do query
    foreach($hosts as $host)
    {
        #echo "host=".$host."\n";
        $out = shell_exec("dig +time=1 +tries=1 +short @".$ns_server." ".$host);
        #echo "out=".$out."\n";
        #echo "filter=".filter_var($out, FILTER_VALIDATE_IP)."\n";
        if(strlen($out)>7) {
            $result= $result+0; // success
        } else {
            $result= $result+1; // failure
        }
#       echo "result=".$result."\n";
    }

    if($result > 0)
    {
        $result=0;
    } else {

        $result=1;
    }

    echo $result;
?>