MQTT簡介
MQTT（Message Queuing Telemetry Transport，消息隊列遙測傳輸）是IBM開發的一個即時通訊協議，有可能成為物聯網的重要組成部分。該協議支持所有平臺，幾乎可以把所有聯網物品和外部連接起來，被用來當做傳感器和制動器（比如通過Twitter讓房屋聯網）的通信協議。
Docker安裝RabbitMQ配置MQTT
使用RabbitMQ作為MQTT服務端，Eclipse Paho作為客戶端。宿主機系統為ubuntu16.04
Docker下載鏡像
docker pull daocloud.io/library/rabbitmq:3.7.4
啟動RabbitMQ
docker run -d --hostname my-rabbit --name some-rabbit -p 15672:15672 -p 5672:5672 -p 1883:1883 -p 15675:15675 daocloud.io/library/rabbitmq:3.7.4
注意映射容器端口
啟用插件
默認安裝后我們需要手動開啟rabbitmq_management插件，rabbitmq_mqtt插件和rabbitmq_web_mqtt插件。
執行如下三條命令
docker exec <容器ID> rabbitmq-plugins enable rabbitmq_managementdocker exec <容器ID> rabbitmq-plugins enable rabbitmq_mqttdocker exec <容器ID> rabbitmq-plugins enable rabbitmq_web_mqtt
當然你也可以寫個腳本start.sh，復制到容器中
/usr/sbin/rabbitmq-plugins enable rabbitmq_management/usr/sbin/rabbitmq-plugins enable rabbitmq_mqtt/usr/sbin/rabbitmq-plugins enable rabbitmq_web_mqtt
進入容器執行這個腳本。
sh start.sh
開放宿主機端口
firewall-cmd --zone=public --add-port=15672/tcp --permanentfirewall-cmd --zone=public --add-port=5672/tcp --permanentfirewall-cmd --zone=public --add-port=1883/tcp --permanentfirewall-cmd --zone=public --add-port=15675/tcp --permanentfirewall-cmd --reload
Python MQTT客戶端實現
安裝python包
pip install paho-mqtt
發送數據demo（消費者）
# 使用前需要啟動hbase和thrift服務器# 啟動hbase在cd /usr/local/hbase下bin/start-hbase.sh 默認端口為 60000# 啟動thrift服務器cd /usr/local/hbase/bin執行./hbase-daemon.sh start thrift 默認端口為9090import sysimport osdir_common = os.path.split(os.path.realpath(__file__))[0] + '/../'sys.path.append(dir_common) # 將根目錄添加到系統目錄,才能正常引用common文件夾import argparse #import loggingimport time,datetimefrom common.py_log import init_logger,init_console_loggerfrom common.config import *from common.py_hbase import PyHbaseimport time,jsonfrom common.py_rabbit import Rabbit_Consumerimport paho.mqtt.client as mqttimport timeHOST = "192.168.2.46"PORT = 1883def client_loop(): client_id = time.strftime('%Y%m%d%H%M%S',time.localtime(time.time())) client = mqtt.Client(client_id) # ClientId不能重復，所以使用當前時間 client.username_pw_set("guest", "guest") # 必須設置，否則會返回「Connected with result code 4」 client.on_connect = on_connect client.on_message = on_message client.connect(HOST, PORT, 60) client.loop_forever()def on_connect(client, userdata, flags, rc): print("Connected with result code "+str(rc)) client.subscribe("test")def on_message(client, userdata, msg): print(msg.topic+" "+msg.payload.decode("utf-8"))if __name__ == '__main__': client_loop()接收數據demo（生產者）
import sysimport osdir_common = os.path.split(os.path.realpath(__file__))[0] + '/../'sys.path.append(dir_common) # 將根目錄添加到系統目錄,才能正常引用common文件夾import paho.mqtt.client as mqttimport timeHOST = "192.168.2.46"PORT = 1883def client_loop(): client_id = time.strftime('%Y%m%d%H%M%S',time.localtime(time.time())) client = mqtt.Client(client_id) # ClientId不能重復，所以使用當前時間 client.username_pw_set("guest", "guest") # 必須設置，否則會返回「Connected with result code 4」 client.on_connect = on_connect client.on_message = on_message client.connect(HOST, PORT, 60) client.loop_forever()def on_connect(client, userdata, flags, rc): print("Connected with result code "+str(rc)) client.subscribe("test")def on_message(client, userdata, msg): print(msg.topic+" "+msg.payload.decode("utf-8"))if __name__ == '__main__': client_loop()生產者demo
# import paho.mqtt.client as mqttimport paho.mqtt.publish as publishimport timeHOST = "192.168.2.46"PORT = 1883def on_connect(client, userdata, flags, rc): print("Connected with result code "+str(rc)) client.subscribe("test")def on_message(client, userdata, msg): print(msg.topic+" "+msg.payload.decode("utf-8"))if __name__ == '__main__': client_id = time.strftime('%Y%m%d%H%M%S',time.localtime(time.time())) # client = mqtt.Client(client_id) # ClientId不能重復，所以使用當前時間 # client.username_pw_set("guest", "guest") # 必須設置，否則會返回「Connected with result code 4」 # client.on_connect = on_connect # client.on_message = on_message # client.connect(HOST, PORT, 60) # client.publish("test", "你好 MQTT", qos=0, retain=False) # 發布消息 publish.single("test", "你好 MQTT", qos = 1,hostname=HOST,port=PORT, client_id=client 官方文檔：
mqtt http://www.rabbitmq.com/mqtt.html
總結
以上就是這篇文章的全部內容了，希望本文的內容對大家的學習或者工作具有一定的參考學習價值，謝謝大家對VEVB武林網的支持。
新聞熱點
疑難解答
圖片精選
