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How do I get host down notifications working?

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How do I get host down notifications working?

Postby cdevidal » Wed Sep 14, 2022 11:16 pm

If I power down a server I don't get any emails; But if I shut down a service running on that server, it emails me. What do I need to do to get host down notification working?

Using Nagios 4.4.6 installed via apt on Ubuntu 22.04. I did a fresh install to get the default configs and only changed where absolutely necessary. Changes listed below.

Again, service notifications are working. Only host down notifications are not.

Uncommented this in nagios.cfg: cfg_dir=/etc/nagios4/servers

servers/web01.cfg:

Code: Select all
define host {
    use                     linux-server
    host_name               web01.example.com
    alias                   web01
    address                 XXX.XXX.XXX.XXX
    notifications_enabled   1
}

define service {
    use                     local-service
    host_name               web01.example.com
    service_description     PING
    check_command           check_ping!100.0,20%!500.0,60%
    notifications_enabled   1
}

define service {
    use                     local-service
    host_name               web01.example.com
    service_description     SSH
    check_command           check_ssh
    notifications_enabled   1
}


objects/templates.cfg is unmodified:

Code: Select all
define contact {

    name                            generic-contact         ; The name of this contact template
    service_notification_period     24x7                    ; service notifications can be sent anytime
    host_notification_period        24x7                    ; host notifications can be sent anytime
    service_notification_options    w,u,c,r,f,s             ; send notifications for all service states, flapping events, and scheduled downtime events
    host_notification_options       d,u,r,f,s               ; send notifications for all host states, flapping events, and scheduled downtime events
    service_notification_commands   notify-service-by-email ; send service notifications via email
    host_notification_commands      notify-host-by-email    ; send host notifications via email
    register                        0                       ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL CONTACT, JUST A TEMPLATE!
}

define host {

    name                            generic-host            ; The name of this host template
    notifications_enabled           1                       ; Host notifications are enabled
    event_handler_enabled           1                       ; Host event handler is enabled
    flap_detection_enabled          1                       ; Flap detection is enabled
    process_perf_data               1                       ; Process performance data
    retain_status_information       1                       ; Retain status information across program restarts
    retain_nonstatus_information    1                       ; Retain non-status information across program restarts
    notification_period             24x7                    ; Send host notifications at any time
    register                        0                       ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}



# Linux host definition template
# This is NOT a real host, just a template!

define host {

    name                            linux-server            ; The name of this host template
    use                             generic-host            ; This template inherits other values from the generic-host template
    check_period                    24x7                    ; By default, Linux hosts are checked round the clock
    check_interval                  5                       ; Actively check the host every 5 minutes
    retry_interval                  1                       ; Schedule host check retries at 1 minute intervals
    max_check_attempts              10                      ; Check each Linux host 10 times (max)
    check_command                   check-host-alive        ; Default command to check Linux hosts
    notification_period             workhours               ; Linux admins hate to be woken up, so we only notify during the day
                                                            ; Note that the notification_period variable is being overridden from
                                                            ; the value that is inherited from the generic-host template!
    notification_interval           120                     ; Resend notifications every 2 hours
    notification_options            d,u,r                   ; Only send notifications for specific host states
    contact_groups                  admins                  ; Notifications get sent to the admins by default
    register                        0                       ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}

define service {

    name                            generic-service         ; The 'name' of this service template
    active_checks_enabled           1                       ; Active service checks are enabled
    passive_checks_enabled          1                       ; Passive service checks are enabled/accepted
    parallelize_check               1                       ; Active service checks should be parallelized (disabling this can lead to major performance problems)
    obsess_over_service             1                       ; We should obsess over this service (if necessary)
    check_freshness                 0                       ; Default is to NOT check service 'freshness'
    notifications_enabled           1                       ; Service notifications are enabled
    event_handler_enabled           1                       ; Service event handler is enabled
    flap_detection_enabled          1                       ; Flap detection is enabled
    process_perf_data               1                       ; Process performance data
    retain_status_information       1                       ; Retain status information across program restarts
    retain_nonstatus_information    1                       ; Retain non-status information across program restarts
    is_volatile                     0                       ; The service is not volatile
    check_period                    24x7                    ; The service can be checked at any time of the day
    max_check_attempts              3                       ; Re-check the service up to 3 times in order to determine its final (hard) state
    check_interval                  10                      ; Check the service every 10 minutes under normal conditions
    retry_interval                  2                       ; Re-check the service every two minutes until a hard state can be determined
    contact_groups                  admins                  ; Notifications get sent out to everyone in the 'admins' group
    notification_options            w,u,c,r                 ; Send notifications about warning, unknown, critical, and recovery events
    notification_interval           60                      ; Re-notify about service problems every hour
    notification_period             24x7                    ; Notifications can be sent out at any time
    register                        0                       ; DON'T REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
}



# Local service definition template
# This is NOT a real service, just a template!

define service {

    name                            local-service           ; The name of this service template
    use                             generic-service         ; Inherit default values from the generic-service definition
    max_check_attempts              4                       ; Re-check the service up to 4 times in order to determine its final (hard) state
    check_interval                  5                       ; Check the service every 5 minutes under normal conditions
    retry_interval                  1                       ; Re-check the service every minute until a hard state can be determined
    register                        0                       ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
}
cdevidal
 
Posts: 7
Joined: Wed Sep 14, 2022 11:12 pm

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