The Node-RED Admin API provides an endpoint called /flows to retrieve a JSON version of the currently deployed flows file. This raw data can be very useful for producing reports of the total nodes deployed, and how many of each type exist in your flows. Using the /nodes endpoint gives some additional information, so the node types can be grouped by the installed "module" name.
These 3 flows are used to:
- Show total node counts by type
- Get node properties for all or specific types
- Group node names by module name and version
Each flow begins with either an http in or inject node -- so it can be executed from either a browser or the Node-RED editor. There is also a Swagger doc for each of these endpoints, so they can be executed directly from the swagger sidebar (when node-red-node-swagger is installed).
The output JSON from the admin APIs is converted into various forms, using change nodes with the appropriate JSONata expressions. For instance, to count all the nodes by type, this simple (yet powerful) expression works nicely:
payload^($uppercase(type)) {
"*": $count($$.payload),
$substringBefore(type, ":"): $count([$])
}
The full source of the flows can be found below...