Nagios-Discord

This is a very simple Python script which will allow Nagios notifications to be announced on Discord. You'll need a webhook on Discord already set up. Discord's guide for this is here. Be sure to update HOOK with your webhook URL as well as changing your.website.com to the appropriate domain at the top of each script.

You'll need to make some modifications to your Nagios installation. The steps are quite easy.

First, we need to make sure we have dependencies installed.
On your cli: pip3 install discord-webhook

Place the scripts in your plugins directory on the Nagios server.

Now we need to create the Nagios commands to call these scripts. These should probably go in your commands.cfg file.

define command {
  command_name notify-host-by-discord
  command_line /usr/lib/nagios/plugins/send-host.py "$NOTIFICATIONTYPE$" "$HOSTNAME$" "$HOSTSTATE$" "$HOSTADDRESS$" "$HOSTOUTPUT$" "$TIMET$"
}

define command {
  command_name notify-service-by-discord
  command_line /usr/lib/nagios/plugins/send-service.py "$NOTIFICATIONTYPE$" "$SERVICEDESC$" "$HOSTNAME$" "$HOSTADDRESS$" "$SERVICESTATE$" "$TIMET$" "$SERVICEOUTPUT$"
}

Next, we should create a Nagios contact. This is usually found in your contacts.cfg file

define contact {
  contact_name          discord
  use                   discord-contact
  alias                 Discord Contact
  email                 some@example.com
}

Add your new contact to your appropriate contact group too!

define contactgroup {
  contactgroup_name     everyone
  alias                 Everyone
  members               alice,bob,discord
}

Finally, add a template in your templates.cfg file.

define contact {
  name                          discord-contact
  service_notification_period   24x7
  host_notification_period      24x7
  service_notification_options  w,u,c,r,f,s
  host_notification_options     d,u,r,f,s
  service_notification_commands notify-service-by-discord
  host_notification_commands    notify-host-by-discord
  register                      0
}