How traffic data is collected about vizceral

[Unfunctioned]

Hello sparrow0930,
to my knowledge Vizceral is just a library/application that allows you to visualize traffic data that is provided to it. So, I do not think that there is any functionality that allows you to monitor node traffic.

Regarding your first question, the traffic data is supplied to Vizceral by providing a traffic graph using the graph format as specified here (in JSON-format):
https://github.com/Netflix/vizceral/wiki/How-to-Use

This data can be supplied by calling the components updateData()-function.

I am not aware of any functionality that allows you to generate this graph format though, so you possibly need to implement that yourself.

An example how sample JSON-files can provided to Viceral can also be found in the Vizceral-example project:
https://github.com/Netflix/vizceral-example

Specifically in the componentDidMount() and beginSampleData() functions of the traffixFlow.jsx-class
https://github.com/Netflix/vizceral-example/blob/master/src/components/trafficFlow.jsx

This class also suggest that the graph can supplied by setting the traffic-parameter of the Vizceral-object in the render-function.

I would like to point out that I only recently started looking at this project again, after not having worked with it in over a year. So I would not consider myself an expert on it.

Anyways I hope that I could be of some help.