Linking containers example not working any more

In the section about linking containers the example to link mosquitto by a bridge network dosn't work with mosquitto:latest (2.0.7), but with the last 1.6.13 seams that the config file of Mosquitto 2 is different and not listening to the network by default.

If I look into the container log I get:

1614083867: mosquitto version 2.0.7 starting
1614083867: Config loaded from /mosquitto/config/mosquitto.conf.
1614083867: Starting in local only mode. Connections will only be possible from clients running on this machine.
1614083867: Create a configuration file which defines a listener to allow remote access.
1614083867: Opening ipv4 listen socket on port 1883.
1614083867: Opening ipv6 listen socket on port 1883.
1614083867: Error: Address not available
1614083867: mosquitto version 2.0.7 running

by altering the docker command to:

docker run -itd --network iot --name mybroker eclipse-mosquitto:1.6.13

it works like expected. So two solutions:

1. using the command like above with the last 1.6 Mosquitto
2. Providing an docker image with adapted mosquitto.conf file to enable listener 1883 and allow_anonymous true to have the same behavior for the latest mosquitto.

Dockerfile could look like:

FROM eclipse-mosquitto:latest

RUN echo "listener 1883" >> /mosquitto/config/mosquitto.conf
&& echo "allow_anonymous true" >> /mosquitto/config/mosquitto.conf

VOLUME ["/mosquitto/data", "/mosquitto/log"]

EXPOSE 1883
ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]

Best Christian

從 Docker 入門文件中的「linking containers」部分開始，使用目前的映像重現其中的 Mosquitto 範例。將結果與 Mosquitto 1.6.13 以及回報的 listener 設定進行比較。當文件中的範例能在受支援的 Mosquitto 版本上運作，並且明確包含任何必要的設定或版本固定時，即視為完成。