MQTT 上的 IotAgent UltraLight 不處理來自 MQTT 代理的值

Question

我正在關注以下教程： https : //github.com/FIWARE/tutorials.IoT-over-MQTT

完全按照教程中的步驟執行步驟 1 到步驟 3（工作正常），在步驟 4 中，我使用 mosquitto_pub 將消息發布到 MQTT 代理。

但是，IotAgent 不會處理 MQTT 消息。 當我嘗試從 Context Broker 檢索數據時，我可以看到這一點，如步驟 5 所示。

使用調試器：

docker exec -it [IOTAGENT CONTAINER] pm2 monit

當 MQTT 消息發布時，也沒有顯示任何事情發生。 我嘗試了以下消息格式：

mosquitto_pub -t "/4jggokgpepnvsb2uv4s40d59ov/motion001/attrs" -m "c|1" 
mosquitto_pub -t /4jggokgpepnvsb2uv4s40d59ov/motion001/attrs -m '{"c":1}'

Mosquitto 代理正在運行並且可以訂閱。 我錯過了一個參數嗎？ IotAgent 未按預期工作的原因可能是什么？ 幾個月前我已經成功測試了設置，但不幸的是，測試參數不再可用。

Answer 1

這很可能是 docker 網絡問題，在本教程中，所有組件（包括 MQTT Broker）都已放置在同一個 docker 網絡中，因此可以相互通信。 我的猜測是，您當前的設置並非如此。

Docker Compose 文件的 IoT 代理部分包含IOTA_MQTT_HOST=mosquitto環境變量，該變量正在偵聽同一網絡中名為mosquitto的 MQTT Broker。

要通過 MQTT 發送測量，您需要從同一網絡內調用 MQTT 發布者。

docker run -it --rm --name mqtt-publisher --network \
  fiware_default efrecon/mqtt-client pub -h mosquitto -m "c|1" \
  -t "/4jggokgpepnvsb2uv4s40d59ov/motion001/attrs"

或者，對於真實安裝，您必須更改IOTA_MQTT_HOST值以引用 MQTT Broker 的真實位置。

Answer 2

使用來自https://github.com/FIWARE/tutorials.IoT-over-MQTT/blob/master/docker-compose.yml 的這個編輯過的 docker compose 文件，我能夠成功運行我的測試。 部署命令：

docker stack deploy -c docker-compose.yml fiware

docker-compose.yml：

version: "3.5"
services:
  orion:
    image: fiware/orion
    hostname: orion
    container_name: fiware-orion
    depends_on:
      - mongo-db
    networks:
      - default
    ports:
      - "1026:1026"
    command: -dbhost mongo-db -logLevel DEBUG
    healthcheck:
      test: curl --fail -s http://orion:1026/version || exit 1

  iot-agent:
    image: fiware/iotagent-ul
    hostname: iot-agent
    container_name: fiware-iot-agent
    depends_on:
      - mongo-db
      - mosquitto
    networks:
      - default
    expose:
      - "4061"
      - "7896"
    ports:
      - "4061:4061"
      - "7896:7896"
    environment:
      - IOTA_CB_HOST=orion # name of the context broker to update context
      - IOTA_CB_PORT=1026 # port the context broker listens on to update context
      - IOTA_NORTH_PORT=4061
      - IOTA_REGISTRY_TYPE=mongodb #Whether to hold IoT device info in memory or in a database
      - IOTA_LOG_LEVEL=DEBUG # The log level of the IoT Agent
      - IOTA_TIMESTAMP=true # Supply timestamp information with each measurement
      - IOTA_CB_NGSI_VERSION=v2 # use NGSIv2 when sending updates for active attributes
      - IOTA_AUTOCAST=true # Ensure Ultralight number values are read as numbers not strings
      - IOTA_MONGO_HOST=mongo-db # The host name of MongoDB
      - IOTA_MONGO_PORT=27017 # The port mongoDB is listening on
      - IOTA_MONGO_DB=iotagentul # The name of the database used in mongoDB
      - IOTA_MQTT_HOST=mosquitto # The host name of the MQTT Broker
      - IOTA_MQTT_PORT=1883 # The port the MQTT Broker is listening on to receive topics
      - IOTA_DEFAULT_RESOURCE= # Default is blank. I'm using MQTT so I don't need a resource
      - IOTA_PROVIDER_URL=http://iot-agent:4061
    healthcheck:
      test: curl --fail -s http://iot-agent:4061/iot/about || exit 1

  mongo-db:
    image: mongo:3.6
    hostname: mongo-db
    container_name: db-mongo
    expose:
      - "27017"
    ports:
      - "27017:27017" # localhost:27017
    networks:
      - default
    command: --bind_ip_all --smallfiles
    volumes:
      - mongo-db:/data

  mosquitto:
    image: eclipse-mosquitto
    hostname: mosquitto
    container_name: mosquitto
    expose:
      - "1883"
      - "9001"
    ports:
      - "1883:1883"
      - "9001:9001"
    volumes:
      - ./mosquitto/mosquitto.conf:/mosquitto/config/mosquitto.conf
    networks:
      - default
networks:
  default:
    ipam:
      config:
        - subnet: 172.18.1.0/24

volumes:
  mongo-db: ~

這些是成功運行的步驟：

0) 健康檢查

curl http://localhost:4061/iot/about

1）創建服務組

curl -iX POST \
  'http://localhost:4061/iot/services' \
  -H 'Content-Type: application/json' \
  -H 'fiware-service: testservice' \
  -H 'fiware-servicepath: /iot_ul' \
  -d '{
 "services": [
   {
     "apikey":      "hallo",
     "cbroker":     "http://orion:1026",
     "entity_type": "multiSensor",
     "resource":    "/iot/d"
   }
 ]
}'

2）創建傳感器

curl -X POST \
  'http://localhost:4061/iot/devices' \
  -H "Content-Type: application/json" \
  -H "fiware-service: testservice" \
  -H "fiware-servicepath: /iot_ul" \
  -d '{
  "devices": [
    {
      "device_id": "sensor01",
      "entity_name": "LivingRoomSensor1",
      "entity_type": "multiSensor",
      "protocol":    "PDI-IoTA-UltraLight",
      "transport":   "MQTT",
      "attributes": [
        { "object_id": "t", "name": "Temperature", "type": "Integer" },
        { "object_id": "l", "name": "Luminosity", "type": "Integer" }
      ]
    }
  ]
}' 

3) 通過 curl 更新值

curl --location --request POST 'http://localhost:7896/iot/d?i=sensor01&k=hallo' \
--header 'Content-Type: text/plain' \
--header 'fiware-service: testservice' \
--header 'fiware-servicepath: /iot_ul' \
--data-raw 't|1|l|3'

4) 檢查值是否更新

curl -X POST -H "Content-Type: application/json" -H "Accept: application/json" -H "Fiware-Service: testservice" -H "Fiware-ServicePath: /iot_ul" -d '{
    "entities": [
        {
            "isPattern": "false",
            "id": "LivingRoomSensor1",
            "type": "multiSensor"
        }
    ]
}' 'http://localhost:1026/v1/queryContext'

5) 通過 mqtt 更新值（也可以從其他機器運行 - 添加參數 -h "hostaddress"）

mosquitto_pub  -m "t|2|l|5" -t "/hallo/sensor01/attrs"