Cant get it running on with docker compose 3.7 on ubuntu linux

[leozilla]

This is similar to #21

I followed the README but I still dont get any visible output on the terminal which listens with nc.

version: '3.7'

networks:
  backend:
    driver: bridge

services:
  host.docker.internal:
    image: qoomon/docker-host
    cap_add: [ 'NET_ADMIN', 'NET_RAW' ]
    restart: on-failure
    networks:
      - backend

  tcp_message_emitter:
    depends_on: [ host.docker.internal ]
    image: alpine
    command: [ "sh", "-c", "while :; do date; sleep 1; done | nc 'host.docker.internal' 2323 -v"]
    networks:
      - backend

$ docker-compose -f docker-compose.yml up -d
Creating network "docker-compose_backend" with driver "bridge"
Creating docker-compose_host.docker.internal_1 ... done
Creating docker-compose_tcp_message_emitter_1  ... done

# i have more networks but I only show the relevant one
$ docker network ls
NETWORK ID          NAME                          DRIVER              SCOPE
a5aa8ca04a22        docker-compose_backend        bridge              local

$ sudo docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' docker-compose_host.docker.internal_1
172.28.0.2
$ sudo ufw allow from 172.28.0.2 proto tcp to any port 2323
Rules updated

All of the following nc commands on the host give no output:

$ nc 127.0.0.1 2323 -lk
$ nc 0.0.0.0 2323 -lk

$ docker network inspect docker-compose_backend --format='{{( index .IPAM.Config 0).Gateway}}'
172.28.0.1
$ nc 172.28.0.1 2323 -lk

Unfortunately I didnt find the problem myself so far, maybe you have some ideas.

[qoomon]

I recently updated the examples, I replaced the container name docker-host with host.docker.internal maybe that is causing problems. Will have a deeper look into it this weekend.

[qoomon]

It was my bad I revert my changes in the README back to docker-host, please try again.
Sorry for the inconvenience.

[leozilla]

@qoomon Thanks it works now. It seems like dashes are not supported in service/container names. Do you know why? because I havent found that this restriction is mentioned in the docker compose docs

[qoomon]

@leozilla actually it works, however it does not work with docker-compose, don't know why