Monitoring Port Status Across Multiple Machines

Simon

I'm trying to monitor if a certain port is open, for various machines. What's the best way to achieve that? So far I'm experimenting with telegraf & _response, ```[[inputs.net_response]] protocol = "tcp" address = "192.168.1.1:5555" timeout = "1s" read_timeout = "1s" [inputs.net_response.tags] name = "Server"``` However, I'm not sure this is the best way to go about it, displaying the yes/no data is a bit tricky.

Prabhat

Is this from a security point of view where you want to cpature which ports are open on which machines?

Simon

A specific port on each machine, I wanna know if they're reachable.

Simon

Not really security, no.

Prabhat

I have never tried this with telegraf or observability tools

Prabhat

I have used `nmap` for this though which is the perfect tool for this kind of activity. Would that help you?

Prabhat

what is the goal of checking the reachability of the ports? health check of the application ?

Simon

Yup

Prabhat

there area a couple of ways to do this.

Prabhat

You can use prometheus blackbox exporter

Prabhat

you could also use otel-collector

Prabhat

Let me get you the right receiver for otel-collector

Prabhat

Looks like otel-collector only has an httpchecker

Prabhat

Prabhat

If you are looking for raw TCP then you can use prometheus blackbox exporter

Simon

Yeah, tcp, it's not an http endpoint.

Prabhat

- this video explains how to setup blackbox exporter and use it with OpenObserve

Simon

Also available as text somewhere? I don't like videos.

Prabhat

not yet. But you should be able to use prometheus blackbox exporter documentation.

Simon

Aye, thanks

Simon

Is there a way to have a simple query for open port? prometheus expects a query/response directly, that's a bit much

Simon

And the readme uses keys that aren't even mentioned in the configuration doc?