如何在 windows 中的 docker 上测试 mqtt？

Question

I have pulled the eclipse-mosquitto image on the docker. How can I test the mqtt client by subscribing and publishing some message through docker?

Following are the details of my system:

Operating System: Windows 10 Home

Docker version 19.03.1

Can someone please guide me with the steps on how to test the mqtt on docker in windows 10?

Thank you

Answer 1

You can test using MQTT client docker container.

• server

Start eclipse-mosquitto container

docker run --name mq -it -p 1883:1883 -p 9001:9001  eclipse-mosquitto

• client:

Then open another terminal window and run subscriber command using docker MQTT client

docker run --rm -it   --link mq   ruimarinho/mosquitto mosquitto_sub -h mq -t '#'

Now open another terminal window and publish a message, you will able to see message in window 2.

docker run --rm -it   --link mq   ruimarinho/mosquitto mosquitto_pub -h mq -t home-assistant/switch/1/on -m "Docker pub-subtest message"

Answer 2

You need to install an MQTT client that can do both Publish and Subscribe. I tend to use the Node.JS MQTT module that includes a client that will do both.

You will need to install Node.JS first. Then do a:

> npm install mqtt

This will install the MQTT Node.JS module under the./node_modules directory in your current directory.

After this, you need to run a Subscriber and a Publisher. The Subscriber you run like so:

> node ./node_modules/mqtt/mqtt.js sub -t "my/local/#" -h "mqtt-broker-host.home.local" -vv

Where mqtt-broker-host.home.local is either the FQDN or the IP address of your MQTT Broker container.

In another terminal session, you can run MQTT publishers:

> node ./node_modules/mqtt/mqtt.js pub -t "my/local/test-topic" -h "mqtt-broker-host.home.local' -m '{"msg": "This is a test" }' 

In your 'sub' terminal you should now see the "This is a test" message if everything is working correctly. If not, look in the 'pub' terminal session for any error messages. If there is none, then you should look at your MQTT Broker log file to see what it thinks is going one.