How to read stats from a remote server

I have a "central" ubuntu server which should read the load stats of several remote ubuntu/debian servers automatically every minute or so. Can it be done in PHP? What would be the best way to accomplish this?

Thanks
Jay
jiiins2Asked:
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boon86Connect With a Mentor Commented:
This shows uptime and load average for 1 server called monitor.php
please place this to other server:

http://myserver1.com/monitor.php
http://myserver2.com/monitor.php
http://myserver3.com/monitor.php
http://myserver4.com/monitor.php

<?php

$uptime = trim(exec("cat /proc/uptime")); 
/*D*/print_r($uptime);
echo "<br/>";
$uptime = explode(" ", $uptime);
$idletime=$uptime[1];
$uptime=$uptime[0];


$day=86400;
$days=floor($uptime/$day);
echo "Up: $days days<br/>";
$utdelta=$uptime-($days*$day);

$hour=3600;
$hours=floor($utdelta/$hour);
echo "$hours hours<br/>";
$utdelta-=$hours*$hour;

$minute=60;
$minutes=floor($utdelta/$minute);
echo "$minutes minutes<br/>";
$utdelta-=round($minutes*$minute,2);

echo "$utdelta seconds<br/>";

echo '<b>Load Average</b><br/>';
echo '<div id="load">';
echo round((1-($idletime/$uptime))*100,3);
echo "%";
echo '</div>';
?>

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This file to place at your central server:

http://mycentralubuntuserver.com/status.php

<?php
include('simple_html_dom.php');
//server 1
$html = file_get_html('http://myserver1.com/monitor.php');
foreach($html->find('div[id=load]') as $key => $info)
{
echo 'Load: '.$info->plaintext."<br />\n";
}
//server 2
$html = file_get_html('http://myserver2.com/monitor.php');
foreach($html->find('div[id=load]') as $key => $info)
{
echo 'Load: '.$info->plaintext."<br />\n";
}
//server 3
$html = file_get_html('http://myserver3.com/monitor.php');
foreach($html->find('div[id=load]') as $key => $info)
{
echo 'Load: '.$info->plaintext."<br />\n";
}
//server 4
$html = file_get_html('http://myserver4.com/monitor.php');
foreach($html->find('div[id=load]') as $key => $info)
{
echo 'Load: '.$info->plaintext."<br />\n";
}

?>

Open in new window


i included: simple_html_dom.php
                 complete.zip

so that you can refer, i tested my code before i post it here.

hope that help


simple-html-dom.php
complete.zip
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dbauermannCommented:
You can try to install Zabbix (www.zabbix.com).

This software collect a lot of information about servers, not only load stats...
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jiiins2Author Commented:
@boon86

Thanks, very interesting. The main stats I'd need to retrive are the current cpu load and mem usage. Would your script provide those as well?
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boon86Commented:
current output is like this:

2312931.92 2298002.62
Up: 26 days
18 hours
28 minutes
51.9199999999 seconds
Load Average
0.645%

Open in new window


for ram you might use:

echo system('free');

my code above its execute uptime command so you will get server load as well.
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jiiins2Author Commented:
What about getting the current load instead of the average?
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madunixCommented:
I use Cacti , MRTG and Nagios, to monitor servers.

Mylist:
http://www.groundworkopensource.com GroundWork Monitor Enterprise
http://www.hyperic.com Hyperic HQ
http://www.icinga.org Icinga
http://www.nagios.com Nagios
http://www.n-able.com N-central
http://www.op5.com op5 Monitor
http://www.open-itcockpit.com openITCockpit
http://www.opennms.org OpenNMS
http://www.hp.com/de/bto HP OpenView
http://www.bmc.com BMC PATROL ProactiveNet Performance Management
http://www.shinken-monitoring.org Shinken
http://www.ibm.com/software/de/tivoli IBM Tivoli
http://www.ca.com/de CA Unicenter
http://www.whatsupgold.com WhatsUp Gold
http://www.zabbix.com Zabbix
http://www.zenoss.com Zenoss Enterprise
http://oss.oetiker.ch/mrtg/ mrtg
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jiiins2Author Commented:
Anything fred and extremely easy to use?
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