This script sends notifications about host UP and DOWN events. In comparison
to just netwatch (
/ tool netwatch) and its
this script implements a simple state machine. Host down events are triggered
only if the host is down for several checks to avoid false alerts.
Just install the script:
Then add a scheduler to run it periodically:
/ system scheduler add interval=1m name=netwatch-notify on-event="/ system script run netwatch-notify;" start-time=startup;
The hosts to be checked have to be added to netwatch with specific comment:
/ tool netwatch add comment="notify, hostname=example.com" host=[ :resolve "example.com" ] timeout=5s;
It is possible to run an up hook command (
up-hook) or down hook command
down-hook) when a notification is triggered. This has to be added in
/ tool netwatch add comment="notify, hostname=poe-device, down-hook=/ interface ethernet poe power-cycle en21;" host=10.0.0.20 timeout=5s;
Also notification settings are required for e-mail and telegram.