Load Alerts

**mr_fern** · March 23rd, 2006, 2:50 PM

Well I decided to write myselfs some scripts to keep me informed of any issues with my servers. I figured I'd share them here.

The first is an Apache watchdog. It basically checks to see if Apache is running. If not, it attempts to restart it. It then sends a text message response regarding the success of the operation. I have tested everything but the restarting, so I won't post it yet.

But I did also create a basic Load alert system. It gets the current load of the system, and checks it against a configured value and then sends a text message if the load is higher than the configured value. It optionally also sends the current load value.

PHP Code:


			
<?php



/***********************************************************************

* Load Doctor v 0.1                                                    *

* (c) 2006 Pierre Fontenelle - http://brooklynrebel.com                *

*                                                                      *

* This program monitors your server's load and will alert you when     *

* the load is higher than a specified value. Alerts are sent via       *

* text messages to ensure prompt awareness.                            *

*                                                                      *

* Dependencies: uptime                                                 *

*                                                                      *

* Currently Supported Cell Companies:                                  *

*                                                                      *

* Sprint PCS (Sprint), Nextel (Nextel), AT&T (Cingular),               *

* Cingular (Cingular), T-Mobile (T-Mobile), Verizon (Verizon)          *

* Note: Parentheses stand for $service value                           *

*                                                                      *

* Valid Phone Number Formats:                                          *

* 1234567890, (123)456-7890, 123-456-7890, (123)456.7890, 123.456.7890 *                                                                       *                                                                      *

***********************************************************************/



// Enter Your Phone Number Here

// Valid Formats: (123)456-7890, 123-456-7890, (123)456.7890, 123.456.7890, 1234567890

$phone_number = '123-456-7890';



// Enter Your Service Name Here

// Valids are listed at the top of file

$service = 'Sprint';



// Subject

// Subject of Text Message

$subj = 'Heartbeat Alert!';



// Max Load

// Set as a float.

// A decent load is CPUs * 1.00;

$load = 0.00;



// Load Message: Sent when load is higher than desired value

$load_msg = 'Your load has gone above the desired load value. ';



// Include Load:

// Set to 1 to include the current load value. 0 to omit it.

$include_load = 1;



// Do Not Edit Below This Line

// Unless You Want To Of Course :)



if (isset($_SERVER['REMOTE_ADDR'])) // Make sure it's run through Command Line

    die('This program is not intended to be run through a browser');



$uptime = exec('uptime'); // get uptime data

$start = strpos($uptime, 'load average:') + strlen('load average: ');

$loads = substr($uptime, $start);

list($current_load, $five_minute_load, $fifteen_minute_load) = explode(', ', $loads);



$txtmsg_address = get_message_addr($phone_number,$service); // prepares text message e-mail address



    if ($current_load > $load)

    {

        $load_msg .= ($include_load) ? 'Current Load: '.$current_load : ''; //append current load

        mail($txtmsg_address, $subj, $load_msg);

    }



function get_message_addr($number,$service) {



    $number = preg_replace('/[^0-9]/','',$number); // strip non digits

    $service = strtolower($service);

    

    $services = array();

    $services['sprint'] = 'messaging.sprintpcs.com';

    $services['nextel'] = 'messaging.nextel.com';

    $services['cingular'] = 'cingularME.com';

    $services['t-mobile'] = 'tmomail.net';

    $services['verizon'] = 'vtext.com';

    

    return $number     .'@'. $services[$service];

}



?>

I had a weird issue occur at one point during testing. It stalled on one instance and shot the load up. It was due to the mail sending, however I think it was a result of the headers I was trying to send (which don't work for the email to sms conversion), so the headers were removed.

The script's intended to be ran as a minute interval cron job

Example Crontab Line:
* * * * * php -q /path/to/load_checker.php

Nothing complex, pretty simple script. If you decide to use it let me know, and let me know how things work out.

And if you have any suggestions, let me hear 'em

You can download a copy from the attached zip (The file header comments don't seem to show in the php code block

**David** · March 23rd, 2006, 4:11 PM

And this is why you are in fact, the man. I'll use this tonight when I get home from work.

**Kayla** · March 23rd, 2006, 4:18 PM

I like "heartbeat alert"..

**David** · March 23rd, 2006, 4:29 PM

I think I see next year's Ultimate Surpasser.

**Emmanuel** · March 23rd, 2006, 4:39 PM

Amazing, simply amazing

thanks for sharing your skills and knowledge

**David** · March 23rd, 2006, 4:40 PM

No problem. I try but...oh you mean Fern. Yeah, thanks Fern.

**Kayla** · March 23rd, 2006, 4:41 PM

**Emmanuel** · March 23rd, 2006, 4:42 PM

Quote:

Originally Posted by David

No problem. I try but...oh you mean Fern. Yeah, thanks Fern.

nice one

head

H · March 23rd, 2006, 4:43 PM

Hmm that's damn nifty. From reading the code, this could actually be run by anyone, even non-dedicated customers, correct?

March 23rd, 2006, 2:50 PM	#1 (permalink)
mr_fern All Ur Base R Belong 2 Us Excelling Contributor Joined in Feb 2005 Lives in Vegas & New York 824 posts Gave thanks: 2 Thanked 6 times	Load Alerts Well I decided to write myselfs some scripts to keep me informed of any issues with my servers. I figured I'd share them here. The first is an Apache watchdog. It basically checks to see if Apache is running. If not, it attempts to restart it. It then sends a text message response regarding the success of the operation. I have tested everything but the restarting, so I won't post it yet. But I did also create a basic Load alert system. It gets the current load of the system, and checks it against a configured value and then sends a text message if the load is higher than the configured value. It optionally also sends the current load value. PHP Code: <?php /*********************************************************************** * Load Doctor v 0.1 * * (c) 2006 Pierre Fontenelle - http://brooklynrebel.com * * * * This program monitors your server's load and will alert you when * * the load is higher than a specified value. Alerts are sent via * * text messages to ensure prompt awareness. * * * * Dependencies: uptime * * * * Currently Supported Cell Companies: * * * * Sprint PCS (Sprint), Nextel (Nextel), AT&T (Cingular), * * Cingular (Cingular), T-Mobile (T-Mobile), Verizon (Verizon) * * Note: Parentheses stand for $service value * * * * Valid Phone Number Formats: * * 1234567890, (123)456-7890, 123-456-7890, (123)456.7890, 123.456.7890 * * * **********************************************************************/ // Enter Your Phone Number Here // Valid Formats: (123)456-7890, 123-456-7890, (123)456.7890, 123.456.7890, 1234567890 $phone_number = '123-456-7890'; // Enter Your Service Name Here // Valids are listed at the top of file $service = 'Sprint'; // Subject // Subject of Text Message $subj = 'Heartbeat Alert!'; // Max Load // Set as a float. // A decent load is CPUs 1.00; $load = 0.00; // Load Message: Sent when load is higher than desired value $load_msg = 'Your load has gone above the desired load value. '; // Include Load: // Set to 1 to include the current load value. 0 to omit it. $include_load = 1; // Do Not Edit Below This Line // Unless You Want To Of Course :) if (isset($_SERVER['REMOTE_ADDR'])) // Make sure it's run through Command Line die('This program is not intended to be run through a browser'); $uptime = exec('uptime'); // get uptime data $start = strpos($uptime, 'load average:') + strlen('load average: '); $loads = substr($uptime, $start); list($current_load, $five_minute_load, $fifteen_minute_load) = explode(', ', $loads); $txtmsg_address = get_message_addr($phone_number,$service); // prepares text message e-mail address if ($current_load > $load) { $load_msg .= ($include_load) ? 'Current Load: '.$current_load : ''; //append current load mail($txtmsg_address, $subj, $load_msg); } function get_message_addr($number,$service) { $number = preg_replace('/[^0-9]/','',$number); // strip non digits $service = strtolower($service); $services = array(); $services['sprint'] = 'messaging.sprintpcs.com'; $services['nextel'] = 'messaging.nextel.com'; $services['cingular'] = 'cingularME.com'; $services['t-mobile'] = 'tmomail.net'; $services['verizon'] = 'vtext.com'; return $number .'@'. $services[$service]; } ?> I had a weird issue occur at one point during testing. It stalled on one instance and shot the load up. It was due to the mail sending, however I think it was a result of the headers I was trying to send (which don't work for the email to sms conversion), so the headers were removed. The script's intended to be ran as a minute interval cron job Example Crontab Line: * * * * * php -q /path/to/load_checker.php Nothing complex, pretty simple script. If you decide to use it let me know, and let me know how things work out. And if you have any suggestions, let me hear 'em You can download a copy from the attached zip (The file header comments don't seem to show in the php code block __________________ Nobody doing nothing

March 23rd, 2006, 4:11 PM	#2 (permalink)
David I'm Dope as Crack Resident. Joined in Mar 2004 Lives in Asheboro, NC Hosted on Pass 7 13,036 posts Gave thanks: 7 Thanked 29 times	And this is why you are in fact, the man. I'll use this tonight when I get home from work. __________________ Last edited by David; March 23rd, 2006 at 4:13 PM.

March 23rd, 2006, 4:29 PM	#4 (permalink)
David I'm Dope as Crack Resident. Joined in Mar 2004 Lives in Asheboro, NC Hosted on Pass 7 13,036 posts Gave thanks: 7 Thanked 29 times	I think I see next year's Ultimate Surpasser. __________________

March 23rd, 2006, 4:39 PM	#5 (permalink)
Emmanuel CTO, Surpass Hosting Super #1 Joined in Apr 2003 Lives in Florida 1,811 posts Gave thanks: 10 Thanked 131 times	Amazing, simply amazing thanks for sharing your skills and knowledge __________________ Emmanuel :: Surpass Hosting Network Admin http://www.SurpassHosting.com

March 23rd, 2006, 4:40 PM	#6 (permalink)
David I'm Dope as Crack Resident. Joined in Mar 2004 Lives in Asheboro, NC Hosted on Pass 7 13,036 posts Gave thanks: 7 Thanked 29 times	No problem. I try but...oh you mean Fern. Yeah, thanks Fern. __________________

March 23rd, 2006, 4:18 PM	#3 (permalink)
Kayla Searcher Surpass Staff Joined in May 2003 Lives in Orlando 24,509 posts Gave thanks: 936 Thanked 787 times	I like "heartbeat alert"..

March 23rd, 2006, 4:41 PM	#7 (permalink)
Kayla Searcher Surpass Staff Joined in May 2003 Lives in Orlando 24,509 posts Gave thanks: 936 Thanked 787 times	LOL __________________ Follow Surpass on Twitter and Facebook Check out interesting finds on the Surpass Blog .... it's coming.

March 23rd, 2006, 4:43 PM	#9 (permalink)
H after g, before i Resident. Joined in Jul 2004 Hosted on Gojira 8,032 posts Gave thanks: 48 Thanked 129 times	Hmm that's damn nifty. From reading the code, this could actually be run by anyone, even non-dedicated customers, correct?

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