Could not connect to TraCI server using port 56213 about intelligent_traffic_lights HOT 3 OPEN

Hi Klaas!

SUMo is not a very friendly tool tbh. As your question is not directly connected with the code I wrote, I suggest to try googling something on the topic of SUMo + Docker.

However, my assumption is that there's a problem with closed ports inside your docker container. As far as I remember, SUMo starts a server on your local machine, but it might be not accessible for some Docker-ish reasons. Since I never used SUMo in Docker, I can't really tell you more. My suggestion would be to try pre-configured docker with SUMo (https://github.com/bogaotory/docker-sumo maybe this is what you need).

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Thanks for the reply! We will further investigate.

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We managed to find a working solution.

Dockerfile

FROM ubuntu:bionic
....
RUN apt-get install -y \
    xserver-xorg-video-dummy \
    x11-apps
.....

docker-compose.yml

services:
  intelligent_traffic_lights:
    build: .
    volumes:
      ....
      - /tmp/.X11-unix/:/tmp/.X11-unix/
    environment:
      - DISPLAY=$DISPLAY

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