#	Name	Rule	Severity	Extra
1	CPU usage > 95% for 15 minutes.	processors.processor_usage >= 95	warning	Max: 1 Delay: 60 Interval: 900
2	Host has been down for 10 minutes.	macros.device_down = 1	critical	Max: 1 Delay: 60 Interval: 600
3	Host has been rebooted.	devices.uptime < 300 AND macros.device = 1	warning	Max: 1 Delay: 60 Interval: 300
4	Host has not been polled within the last day.	devices.last_polled >= 86400	critical	Max: 1 Delay: 60 Interval: 300
5	Memory usage > 95% for 5 minutes.	mempools.mempool_perc >= 95	warning	Max: 1 Delay: 60 Interval: 300
6	Network usage > 80% for 5 minutes.	%macros.port_usage_perc >= "80"	ok	Max: 1 Delay: 60 Interval: 600
7	Root filesystem has less than 5% free space available.	storage.storage_descr = "/" AND storage.storage_perc >= 95	critical	Max: 1 Delay: 60 Interval: 300
8	Service up/down	services.service_status != 0 AND macros.device_up = 1	warning	Max: 1 Delay: 60 Interval: 300
9	Host has entered a Warning state.	%services.service_status = "1"	warning	Max: -1 Delay: 300 Interval: 300
10	Host has entered a Critical state.	%services.service_status = "2"	critical	Max: -1 Delay: 300 Interval: 300

Telegram HTML Alert Template

LibreNMS allows you to customize the alert message that is sent to your transport endpoint. The following is my default message. I did not bother with additional templates.

Alert Title: LibreNMS ({{ $alert->hostname }}) - NEW ALERT
Recovery Title: LibreNMS ({{ $alert->hostname }}) - END OF ALERT
Alert Body:

<b><i><u>{{ $alert->title }}</u></i></b>

@if ($alert->state == 0)<b><u>Duration:</u></b> {{ $alert->elapsed }} @else <b><u>Severity:</u></b> {{ $alert->severity }} @endif

<b><u>Rule:</u></b> @if ($alert->name) {{ $alert->name }} @else {{ $alert->rule }} @endif

@if ($alert->faults)<b><u>Faults:</u></b>
@foreach ($alert->faults as $key => $value)
  {{ $key }}: {{ $value['string'] }}
@endforeach
@endif

<b>---------------------------</b>
<b><u>Timestamp:</u></b> {{ $alert->timestamp }}
<b><u>Uptime:</u></b> {{ $alert->uptime_long }}

Alert Example

The following is a screenshot of my telegram bot displaying a test alert