monitoring

#!/usr/bin/env php
<?php
class ServerMonitor {

    public $hosts = array(
        'DNS Server' => '10.0.0.215',
        'CRM RC'     => 'crm.rc.edp',
        'CRM Work'   => 'crm.w.edp',
        'CRM Prod'   => 'crm.pl.edp',
        'Jenikins'   => 'ci.w.edp',
    );

    public $hostsByIp = array(
        'CRM RC'     => '10.0.0.222',
        'CRM Work'   => '10.0.0.221',
        'CRM Prod'   => '10.0.0.217',
    );

    function check($host) {
        exec("ping -c 1 $host", $o, $r);
        return (int)$r === 0;
    }

    function alert($msg) {
        `DISPLAY=:0.0 /usr/bin/notify-send -u critical -i /usr/share/icons/Faenza/status/scalable/error.svg 'Hosts are down'  '$msg' `;
    }

    function run() {
        $msg = '';
        $hosts = $this->hosts;

        if(!$this->check($this->hosts['DNS Server'])) {
            $msg .= "DNS is down\n";
            $hosts = $this->hostsByIp;
        }

        foreach($hosts as $name => $host) {
            if (!$this->check($host)) $msg .= "$name ($host)\n";
        }

        if($msg) {
            $this->alert($msg);
        }

    }
}


$Monitoring = new ServerMonitor();
$Monitoring->run();