nextcloud-docs/eclipse-mosquitto/content.md

What is Eclipse Mosquitto?

Eclipse Mosquitto is an open source implementation of a server for versions 5, 3.1.1, and 3.1 of the MQTT protocol. Main homepage: http://mosquitto.org/

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Eclipse Mosquitto and Cedalo

Cedalo provides commercial support, enterprise MQTT products, professional services and training for Eclipse Mosquitto.

How to use this image

Directories

Three directories have been created in the image to be used for configuration, persistent storage and logs.

/mosquitto/config
/mosquitto/data
/mosquitto/log

It is suggested to mirror this structure for your local configuration.

Configuration

When running the image, the default configuration values are used. To use a custom configuration file, create your mosquitto.conf in $PWD/mosquitto/config/mosquitto.conf, then mount the config directory to /mosquitto/config.

$ docker run -it -p 1883:1883 -v "$PWD/mosquitto/config:/mosquitto/config" %%IMAGE%%

Configuration can be changed to:

• persist data to /mosquitto/data
• log to /mosquitto/log/mosquitto.log

i.e. add the following to mosquitto.conf:

persistence true
persistence_location /mosquitto/data/
log_dest file /mosquitto/log/mosquitto.log

Note: If a volume is used, the data will persist between containers.

Run

Run a container using the new image:

$ docker run -it -p 1883:1883 -v "$PWD/mosquitto/config:/mosquitto/config" -v /mosquitto/data -v /mosquitto/log %%IMAGE%%

or:

$ docker run -it -p 1883:1883 -v "$PWD/mosquitto/config:/mosquitto/config" -v "$PWD/mosquitto/data:/mosquitto/data" -v "$PWD/mosquitto/log:/mosquitto/log" %%IMAGE%%

Note: if the mosquitto configuration (mosquitto.conf) was modified to use non-default ports, the docker run command will need to be updated to expose the ports that have been configured.

For example, if you use port 1883 and port 8080:

$ docker run -it -p 1883:1883 -p 8080:8080 -v "$PWD/mosquitto/config:/mosquitto/config" %%IMAGE%%