SMS

Sending Zabbix Alert SMS via USB modem

Posted on by looke

During some Zabbix sessions, I thought it would be nice to be able to alert via SMS. Zabbix, out of the box, supports the possibility to send SMS via attached GSM modems, so I gave it a try. I am currently using a Huawei USB modem:


Bus 003 Device 011: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem / E230/E270/E870 HSDPA/HSUPA Modem

Unfortunately, this modem has some troubles with the AT command sequences Zabbix sends:
/var/log/zabbix-server/zabbix_server.log


   856:20120120:170920.965 Read from GSM modem [^MOK^M]
   856:20120120:170920.965 End of read_gsm():SUCCEED
   856:20120120:170920.965 Write to GSM modem [ATE0^M]
   856:20120120:170920.965 In read_gsm() [OK] [NULL] [NULL] [NULL]
   856:20120120:170921.069 Read from GSM modem [^MOK^M]
   856:20120120:170921.069 In check_modem_result()
   856:20120120:170921.069 End of check_modem_result():SUCCEED
   856:20120120:170921.069 End of read_gsm():SUCCEED
   856:20120120:170921.069 Write to GSM modem [AT^M]
   856:20120120:170921.069 In read_gsm() [OK] [NULL] [NULL] [NULL]
   856:20120120:170921.173 Read from GSM modem [^MOK^M]
   856:20120120:170921.174 In check_modem_result()
   856:20120120:170921.174 End of check_modem_result():SUCCEED
   856:20120120:170921.174 End of read_gsm():SUCCEED
   856:20120120:170921.174 Write to GSM modem [AT+CMGF=1^M]
   856:20120120:170921.174 In read_gsm() [OK] [NULL] [NULL] [NULL]
   856:20120120:170921.277 Read from GSM modem [^MOK^M]
   856:20120120:170921.277 In check_modem_result()
   856:20120120:170921.277 End of check_modem_result():SUCCEED
   856:20120120:170921.277 End of read_gsm():SUCCEED
   856:20120120:170921.277 Write to GSM modem [AT+CMGS="]
   856:20120120:170921.277 Write to GSM modem [0041791234567]
   856:20120120:170921.277 Write to GSM modem ["^M]
   856:20120120:170921.277 In read_gsm() [> ] [NULL] [NULL] [NULL]
   856:20120120:170921.385 Read from GSM modem [^M> ]
   856:20120120:170921.385 In check_modem_result()
   856:20120120:170921.385 End of check_modem_result():SUCCEED
   856:20120120:170921.385 End of read_gsm():SUCCEED
   856:20120120:170921.385 Write to GSM modem [Host xyz is unreachable: PROBLEM]
   856:20120120:170921.385 Write to GSM modem [^Z]
   856:20120120:170921.385 In read_gsm() [+CMGS: ] [NULL] [NULL] [NULL]
   856:20120120:170921.489 Read from GSM modem [^M]
   856:20120120:170921.489 In check_modem_result()
   856:20120120:170921.489 End of check_modem_result():FAIL
   856:20120120:170921.489 End of read_gsm():FAIL
   856:20120120:170921.489 Write to GSM modem [^MESC^Z]
   856:20120120:170921.489 In read_gsm() [] [NULL] [NULL] [NULL]
   856:20120120:170921.489 Error during wait for GSM modem.
   856:20120120:170921.489 Read from GSM modem []
   856:20120120:170921.489 End of read_gsm():SUCCEED
   856:20120120:170921.494 End of send_sms():FAIL
   856:20120120:170921.494 End execute_action()
   856:20120120:170921.494 Error sending alert ID [62]

After some research I figured out that it probably would be a better idea to write a wrapper-script to implement the SMS functionality. There is actually a way to fix this AT command sequence issue, but it would require recompiling some parts of Zabbix (which is not an option for me, as I use the Debian packaged Zabbix). To interface with the modem, I am finally using Gnokii:

/etc/zabbix/gnokii.conf


[global]
port = /dev/ttyUSB1
model = AT
connection = serial

Thats the script I use to send the alerts to (taken straight from zabbix.com):

/etc/zabbix/alert.d/zabbix-sms.sh


#!/bin/sh 
LOGFILE="/var/log/zabbix-server/zabbix-sms.log" 
echo "To: '$1' Text: '$3'" >> ${LOGFILE} 
PHONENR=`echo "$1" | sed s#\s##` 
/bin/echo "$3" | /usr/bin/gnokii --config /etc/zabbix/gnokii.conf --sendsms "${PHONENR}" 1>>${LOGFILE} 2>&1

Here are some screenshots on how to configure the SMS alert in the Zabbix GUI:

Links
http://www.zabbix.com/wiki/howto/config/alerts/sms
http://lab4.org/wiki/Zabbix_Medien_einrichten

Sending free SMS over the SWITCH Mailgateway

Posted on by looke

One of the nice aspects of working in a universitary environment is, that you can take advance of many nice little things. For example, you can send free SMS via the Switch Mailgateway (http://www.switch.ch/mail/)

To do so, I wrote a simple PHP script, wich enables me to send SMS via a little Textbox through a Website. I used the PEAR Framework to implement the mailing- function. For readability I stripped away the HTML forms and JavaScript functions, wich limited the form’s capacity to the SMS- usual 160 characters.

<?php
require_once('Mail.php');

if (isset($_POST['smsor_message'])) {
	$options = array (
		'host'      => 'smtp.unibas.ch',
		'auth'      => false,
	);
	$mailer = Mail::factory('smtp', $options);
	if (true === PEAR::isError($mailer)) {
		die ($mailer->getMessage());
	}
	$headers = array(
		'From' => 'me@unibas.ch',
		'To' => $_POST['smsor_to']."@sms.switch.ch",
	);
	$res = $mailer->send($_POST['smsor_to']."@sms.switch.ch",
				$headers,
				$_POST['smsor_message']);

	if (true === PEAR::isError($res)) {
		die ($res->getMessage());
	}
	echo "Message <br>\n<i>".$_POST['smsor_message']."</i><br>\n
		sent to <i>".$_POST['smsor_to']."</i><br>\n";
	echo "<br><hr><br>";
}
?>