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# mqtt
Documentation and source code for the departmental mqtt server hosted at https://mqtt.chem.wisc.edu.
To prepare (starting with Ubuntu 20.04)
```
$ apt install docker.io
$ apt install docker-compose
```
This machine needs the following ports to be open to the campus network:
- 80 (http) (used via reverse proxy)
- 1883 (mqtt)
- 8086 (influxdb)
To run:
```
$ docker-compose up -d --build
```
Volumes:
This compose file will create a docker volume `mqtt_influxdb`.
This volume contains the influx database itself and should be backed up.
On the host machine it appears at `/var/lib/docker/volumes/mqtt_influxdb/`.
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