DockerでMosquittoを動かしてMQTTとWebSocket通信してみる

DockerfileとMosquittoの設定ファイルを作ります。

Dockerfile

FROM ubuntu:18.04

RUN apt-get update
RUN apt-get install -y mosquitto mosquitto-clients

COPY ./mosquitto.conf /etc/mosquitto/mosquitto.conf

# MQTT Port
EXPOSE 1883

# WebSocket Port
EXPOSE 8080

CMD ["mosquitto", "-c", "/etc/mosquitto/mosquitto.conf"]

mosquitto.conf

# Place your local configuration in /etc/mosquitto/conf.d/
#
# A full description of the configuration file is at
# /usr/share/doc/mosquitto/examples/mosquitto.conf.example

pid_file /var/run/mosquitto.pid

persistence true
persistence_location /var/lib/mosquitto/

log_dest file /var/log/mosquitto/mosquitto.log

include_dir /etc/mosquitto/conf.d

listener 1883

listener 8080
protocol websockets

イメージをビルド、コンテナを起動します。

$ docker build -t mosquitto_image .
$ docker run -d -p 1883:1883 -p 8080:8080 --name mosquitto_container mosquitto_image

MQTTクライアントからpub/subしてみます。

$ mosquitto_pub -h localhost -p 1883 -d -t hello_topic -m "hello"
Client mosq-8zgvruDJ1gCOBNFchP sending CONNECT
Client mosq-8zgvruDJ1gCOBNFchP received CONNACK (0)
Client mosq-8zgvruDJ1gCOBNFchP sending PUBLISH (d0, q0, r0, m1, 'hello_topic', ... (5 bytes))
Client mosq-8zgvruDJ1gCOBNFchP sending DISCONNECT

$ mosquitto_sub -h localhost -p 1883 -d -t hello_topic
Client mosq-GP0NmJL6vHdSMuuhF7 sending CONNECT
Client mosq-GP0NmJL6vHdSMuuhF7 received CONNACK (0)
Client mosq-GP0NmJL6vHdSMuuhF7 sending SUBSCRIBE (Mid: 1, Topic: hello_topic, QoS: 0, Options: 0x00)
Client mosq-GP0NmJL6vHdSMuuhF7 received SUBACK
Subscribed (mid: 1): 0
Client mosq-GP0NmJL6vHdSMuuhF7 received PUBLISH (d0, q0, r0, m0, 'hello_topic', ... (5 bytes))
hello

MQTT over WebSocketからもpub/subしてみます。

以上。