Nagios Support Forum

Posted: **Tue Feb 22, 2022 9:34 am**

Hi all!

I've recently started using Nagios Core for my monitoring purposes and right now I'm struggling with proper setup of contacts and / or notifications for contact.

I do have a mailserver already present in my network so I didn't install new one on the Nagios machine ( Postfix, etc ... ).
What I did instead is edited the "notify-host-by-email" command in commands.cfg.

Code: Select all

define command {
    command_name    notify-host-by-email
    command_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mailx -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" -S smtp="smtp://<myMailServerIP>" -S from="[email protected]( Nagios )" $CONTACTEMAIL$
}

This seems to be working just fine. I had to do some tweaking on the mailserver but I have tested this by just running the command in command line ( filling in some details ). It worked as I expected.

Where my problem lies is correct contact settings ? I guess.

say I have following host:

Code: Select all

define host {

    host_name               akro-200                        
    parents                 akro-gw
    use                     akro-server                         
    alias                   Akropolis DC             
    address                 <IP>                  
    hostgroups              akro-servers                           
    _PORT                   <PORT>
    _TOKEN                  <NCPATOKEN>
}

where use akro-server is:

Code: Select all

define host {
    name                            akro-server          
    use                             generic-host           
    check_period                    24x7                   
    check_interval                  5                       
    retry_interval                  1                       
    max_check_attempts              10                     
    check_command                   check-host-alive-p       
    contact_groups                  admins                  
    contacts                        fsit
    hostgroups                      akro-servers             
    register                        0                      
}

with contact_groups admins and contacts fsit being:

Code: Select all

define contact {

    contact_name            fsit                    
    alias                   fsit                    
    email                   [email protected]      
    
    service_notification_period     24x7
    service_notification_options    w,u,c,r,f,s
    service_notification_commands   notify-service-by-email
    host_notification_period        24x7
    host_notification_options       d,u,r,f,s
    host_notification_commands      notify-host-by-email
}

define contactgroup {

    contactgroup_name       admins
    alias                   Nagios Administrators
    members                 fsit
    
}

when this host goes down I'm not receiving any emails. Same goes for the services added to this host.
Can anyone tell me how to setup mail notifications properly ? Or tell me what am I doing wrong ?

Thank you all kindly.
Joe

Nagios Support Forum

Properly setting email notifications for contacts.

Properly setting email notifications for contacts.