How can i get the portnumber of the current node-red instance that is running. I can not get port: process.env.PORT || 1880 working.

To set the port you have three options: do nothing and Node-RED will use port 1880 by default set the PORT env var and Node-RED will use that instead use the -p option and it will use that value and not the value of the PORT env var. The only place to add something to global context is in the set…

If you just need to know it in order to diagnose a problem then start node-red in a terminal and the startup log will tell you. You will see something like 10 Jan 16:27:36 - [info] Server now running at http://127.0.0.1:1880/

If you need it in your Node-RED flow, you can simply add it to the global variables in settings.js, I do this with the PID so that I can kill Node-RED in a flow if I want to.

I need the information in a flow in order to get the node-red version for a status page. I added port:process.env.PORT || 1880 to functionGlobal context, but i always get 1880 as a result, even if i am running node-red on another port 1881 e.g.

For that to work, you need to use the PORT env variable to set the port before starting Node-RED. If you set the port another way, make sure you have the number in a variable and pass that variable to the globals.

What do you mean by use the PORT env variable to set the port before starting? How can i pass the port number to global variables? I start node red the following in the cmd: node-red -p 1885 -u . -settings.js flows.json For the setting.js, I added some information under functionGlobalContext:…

You mean to say that the below settings is expected to work?. Unfortunately it is not working for me ,anything wrong ? functionGlobalContext: { userPort:process.env.PORT }

module.exports = { // the tcp port that the Node-RED web server is listening on uiPort: process.env.PORT || 1880,

I was trying to get port number which I pass as command line using global variable. I declared a variable userPort and tried to initialize . Is there any other way to get the global variable in my custom node?

Thanks Nick ,I think you meant RED.settings.uiPort .This worked.

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Port number of running node-red instance

General

knolleary 24 April 2020 06:33 12

In a node you should be able to access RED.settings.port.

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Port number of running node-red instance

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