MQTT Broker Docker Setup¶
Host Persistent Directories¶
Make directory for /Container/eclipse-mosquitto-16
Create following directories in it:
config
data
docroot
log
Create an initial configuration in config/mosquitto.conf:
persistence true
persistence_location /mosquitto/data/
log_dest file /mosquitto/log/mosquitto.log
listener 9001
protocol websockets
http_dir /mosquitto/docroot
Container Configuration¶
Name: eclipse-mosquitto-2020 Command: /usr/sbin/mosquitto -c /mosquitto/config/mosquitto.conf Entrypoint: /docker-entrypoint.sh CPU Limit: 10% Memory Limit: 1200 MB
Container Hostname: mqtt-16
Network, exposed ports:
for MQTT protocol: QNAP-Host: 1883, Container: 1883, TCP
for Websockets: QNAP-Host: 9001, Container: 9001, TCP
Shared Folders:
Volume from host:
/Container/eclipse-mosquitto-16/config => /mosquitto/config
/Container/eclipse-mosquitto-16/data => /mosquitto/data
/Container/eclipse-mosquitto-16/log => /mosquitto/log
HTTP server for the Web App¶
Note
The MQTT broker could also provide some files via http but is made too simple as the mime types cannot be configured. So JS files will not be interpreted by the browers. Therefore an nginx is used here to provide the web app files.
Docker OS used: offical nginx
Name: nginx-safechicken CPU Limit: 10% Memory Limit: 1200 MB
Container Hostname: nginx-safechicken
Network, exposed ports:
for MQTT protocol: QNAP-Host: 9000, Container: 80, TCP
Volume from host:
/Container/http-safechicken/docroot => /usr/share/nginx/html
Set directory permissions:
cd /usr/share/nginx/html chown nginx:nginx . chown nginx:nginx -R ./*
MQTT Client for Testing¶
Proposed client: https://mqtt-explorer.com/
snap install mqtt-explorer
Run it like this: mqtt-explorer
Name: <some name> Host: <your Docker host> Port: 1883
MQTT Manual Test¶
Using mqtt-explorer > Publish json
test1/topic1: {“value1”:11, “array1”: [“val1”, “val2”]}
Select “retain” to store it in a database so you could better test it.