Docker – how to expose http endpoints on two ports in node-red

I’m a bit curious as to why you want to do this. But there are definitely ways to do it. Here’s an example using docker-compose and nginx. Nginx will listen on ports 1880 and 1881 and pass any requests on to the node-red container.

Create an Nginx config file called nginx.conf with this content

server {
    listen 1880;

    location / {
        proxy_pass http://nodered:1880/;
    }
}

server {
    listen 1881;

    location / {
        proxy_pass http://nodered:1880/;
    }
}

and a docker-compose.yml file with this

version: '3'

services:
  nodered:
    image: nodered/node-red
  proxy:
    image: nginx:alpine
    volumes:
      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
    ports:
      - 1880:1880
      - 1881:1881

Spin up the containers using docker compose up -d and you should be able to reach node-red on both http://localhost:1880/ and on http://localhost:1881/.