How to use 2 tunnel port in ngrok within docker-compose

I just wanted to share this since I’m trying to get kafka and confluent schema registry within docker-compose to be exposed to the internet.

docker-compose.yaml

services:

  ngrok:
    image: ngrok/ngrok:latest
    restart: unless-stopped
    command:
      - "start"
      - "--all"
      - "--config"
      - "/etc/ngrok.yml"
    volumes:
      - ./ngrok.yml:/etc/ngrok.yml
    ports:
      - 4040:4040

ngrok.yml

version: 2
authtoken: XXXYYYYZZZZ
log: stdout
tunnels:
  kafka:
    addr: "kafka:9092"
    proto: tcp
  schema-registry:
    addr: "schema-registry:8081"
    proto: tcp

Full example available at https://github.com/alberttwong/onehouse-demos/tree/main/mysql-debezium

Thanks to https://rmoff.net/2023/11/01/using-apache-kafka-with-ngrok/