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I am trying to setup Slack interactivity (handling the interactive elements click) on my backend. Of course, for this task I need to have a https:// endpoint, so ngRok is the best solution for this. I have previously worked with this tool and it is great, this is my old config for docker compose:

ngrok:
    image: ngrok/ngrok:latest
    restart: on-failure
    env_file: ./.env.dev
    command: tunnel --label edge=${NGROK_EDGE_GROUP} backend:8000
    ports:
      - 4040:4040
    environment:
      - NGROK_AUTHTOKEN=${NGROK_AUTHTOKEN}

But now I have a new project and now I am running the Linux shell using the docker-compose, and inside the shell I am running the command npm run dev to start my server inside the shell. I have tried to start my docke-compose using this Dockerfile setup:

RUN apt-get update && apt-get install -y wget \
    && wget https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip \
    && unzip ngrok-stable-linux-amd64.zip \
    && mv ngrok /usr/local/bin/ngrok \
    && rm ngrok-stable-linux-amd64.zip

COPY .env.docker /app/.env.docker

EXPOSE 3001
EXPOSE 4040

ENV NGROK_AUTHTOKEN=${NGROK_AUTHTOKEN}
ENV NGROK_EDGE_GROUP=${NGROK_EDGE_GROUP}

But unfortunately this attempt was a fail. Also I have tried to run this command ngrok tunnel --label edge=${NGROK_EDGE_GROUP} 8000 inside the shell directly, but got the error like 'Unknown command "tunnel"'. Will be very appreciated for the solution!

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  • 1
    You missed RUN docker command to run ngrok. Try the next: RUN ngrok tunnel --label edge=${NGROK_EDGE_GROUP} http 8000 --authtoken=${NGROK_AUTHTOKEN}"] Commented Jun 5, 2024 at 7:46
  • 1
    Or even better - try ready-to-use scenario github.com/shkoliar/docker-ngrok Commented Jun 5, 2024 at 7:47
  • 1
    You can't RUN background processes in a Dockerfile. In most cases it's better to run only one process in a container (you should not need to manually run commands inside containers). Can you run the ngrok tunnel in a separate container alongside your main application container? Commented Jun 5, 2024 at 9:20
  • @DavidMaze I have tried to do this. This is a part of my docker compose: ngrok: image: ngrok/ngrok:latest restart: on-failure env_file: ./.env.docker command: tunnel --label edge=${NGROK_EDGE_GROUP} app:3001 ports: - 4040:4040 environment: - NGROK_AUTHTOKEN=${NGROK_AUTHTOKEN} networks: - local And it doesn't work Commented Jun 5, 2024 at 12:11
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