Send SMS notifications with Nagios using a GSM modem

Follow the below steps to set up Nagios to send SMS notifications with a GSM modem

1) ############## Install the GSM modem ##############################

Physically connect your GSM modem and find out if it is installed and which tty it is using.

Check if it is installed properly:

lsusb        # you should see your device is listed


dmesg | grep tty       # will help you to find the proper tty for your device



2) ############## Install gammu #######################################

use yum to install gammu

yum install gammu



3) ###############    Specify device in gammu config file /etc/gammurc  ######################

    [gammu]
    port= /dev/ttyS0   #or /dev/ttyUSB0   #or /dev/ttyACM0
    connection = at115200


4) ############### Check and set the permissions on the device #####################################

ls -l /dev/ttyS0

crw-rw---- 1 root dialout 4, 64 2008-05-21 14:23 ttyS0

You can notice the usergroup is "dialout" and the owner is root.

You need to add www-data (or apache) and nagios to the dialoutgroup

sudo usermod -a -G dialout nagios
sudo usermod -a -G dialout www-data


5) ###################  Test it! #########################################

You can now try to send an SMS :

su nagios
echo "sms test" | /usr/bin/gammu --sendsms TEXT +336xxxxxxxxx



6) ############### Commands on Nagios #########################

define command{
        command_name    notify-host-by-sms
        command_line    /usr/bin/printf "%b" "Nagios Notification: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nTime: $LONGDATETIME$\n" | /usr/bin/gammu --sendsms text $CONTACTPAGER$
        }



define command{
        command_name    notify-service-by-sms
        command_line    /usr/bin/printf "%b" "Nagios Notification: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nTime: $LONGDATETIME$\n" | /usr/bin/gammu --sendsms text $CONTACTPAGER$
        }




7) ##################  Set up Contacts #################################



define contact{
    contact_name SMSUser
    alias SMS User
    service_notification_period 24x7
    host_notification_period 24x7
    service_notification_options w,u,c,r
    host_notification_options d,u,r
    service_notification_commands notify-service-by-email,notify-service-by-sms
    host_notification_commands notify-host-by-email,notify-host-by-sms
    email rassoulg@sbs.com.au
    pager 0413771358
}



8) ############# Add contacts and notifications to Objects ########################




define host{
        use                     linux-server            ; Name of host template to use
        host_name               nitrogen
        alias                   nitrogen
        address                 10.21.160.106
    contacts        SMSUser
    first_notification_delay    0
    notification_interval        30
    notification_period        24x7
        }

define service{
        use                             local-service         ; Name of service template to use
        host_name                       nitrogen
        service_description             PING
    check_command            check_ping!100.0,20%!500.0,60%
    contacts            SMSUser
    first_notification_delay    0
    notification_interval        30
    notification_period        24x7
        }