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

从 Docker 入门文档中的“linking containers”部分开始，使用当前镜像复现其中的 Mosquitto 示例。将结果与 Mosquitto 1.6.13 以及报告的 listener 配置进行比较。当文档中的示例能够在受支持的 Mosquitto 版本上运行，并且明确包含任何必需的配置或版本固定时，即视为完成。