Message Synchronize between Baetyl-Hub and Baidu IoTHub via Baetyl-Remote-MQTT module¶
- The operating system as mentioned in this document is Ubuntu18.04.
- It should be installed for Baetyl when you read this document, more details please refer to Quick-install-Baetyl
- The MQTT client toolkit which is used to connect to Baidu IoTHub is MQTT.fx
- The MQTT client toolkit which is used to connect to Baetyl-Hub is MQTTBox.
- The hub and Baetyl-Remote-MQTT module images used have published by BIE Cloud Management Suite:
- Docker images compiled from the Baetyl source code also can be used. More detailed contents please refer to Build Baetyl from source
- The Remote Hub as mentioned in this document is Baidu IoTHub
The Baetyl-Remote-MQTT module was developed to meet the needs of the IoT scenario. The Baetyl(via Baetyl-Hub module) can synchronize message with Remote Hub services(Baidu IoTHub) via the Baetyl-Remote-MQTT module. That is to say, through the Baetyl-Remote-MQTT module, we can either subscribe the message from Remote Hub and publish it to the Baetyl-Hub module or subscribe the message from Baetyl-Hub module and publish it to Remote Hub service. The configuration of Baetyl-Remote-MQTT module can refer to Baetyl-Remote-MQTT module Configuration.
- Step 1：Create device(MQTT client) connection info(include
policy, etc.) via Baidu IoTHub.
- Step 2：Select MQTT.fx as the MQTT client that used to connect to Baidu IoTHub.
- If connect successfully, then do the following next.
- If connect unsuccessfully, then retry it until it connect successfully. More detailed contents can refer to How to connect to Baidu IoTHub via MQTT.fx。
- Step 3：Startup Baetyl in docker container mode, and observe the log of Baetyl.
- If the Baetyl-Hub module and Baetyl-Remote-MQTT module start successfully, then do the following next.
- If the Baetyl-Hub module and Baetyl-Remote-MQTT module start unsuccessfully, then retry
Step 3until they start successfully.
- Step 4：Select MQTTBox as the MQTT client that used to connect to the Baetyl-Hub.
- If connect successfully, then do the following next.
- If connect unsuccessfully, then retry
Step 4until it connect successfully.
- Step 5：Due to the configuration of Baetyl-Remote-MQTT module, using MQTTBox publish message to the specified topic, and observing the receiving message via MQTT.fx. Similarly, using MQTT.fx publish message to the specified topic, and observing the receiving message via MQTTBox.
- Step 6：If both parties in
Step 5can receive the message content posted by the other one, it indicates the Remote function test passes smoothly.
The workflow diagram are as follows.
using Baetyl-Remote-MQTT module to synchronize message
Message Synchronize via Baetyl-Remote-MQTT module¶
Configuration file location for the Baetyl main program is:
The configuration of Baetyl Master are as follows:
version: v0 services: - name: localhub image: hub.baidubce.com/baetyl/baetyl-hub:latest replica: 1 ports: - 1883:1883 mounts: - name: localhub-conf path: etc/baetyl readonly: true - name: localhub-data path: var/db/baetyl/data - name: localhub-log path: var/log/baetyl - name: remote-iothub image: hub.baidubce.com/baetyl/baetyl-remote-mqtt:latest replica: 1 mounts: - name: remote-iothub-conf path: etc/baetyl readonly: true - name: remote-iothub-cert path: var/db/baetyl/cert readonly: true - name: remote-iothub-log path: var/log/baetyl volumes: # hub - name: localhub-conf path: var/db/baetyl/localhub-conf - name: localhub-data path: var/db/baetyl/localhub-data - name: localhub-log path: var/db/baetyl/localhub-log # remote mqtt - name: remote-iothub-conf path: var/db/baetyl/remote-iothub-conf - name: remote-iothub-cert path: var/db/baetyl/remote-iothub-cert - name: remote-iothub-log path: var/db/baetyl/remote-iothub-log
Configuration file location for Baetyl-Hub module is:
The configuration of Baetyl-Hub module is as follow:
listen: - tcp://0.0.0.0:1883 principals: - username: test password: hahaha permissions: - action: 'pub' permit: ['#'] - action: 'sub' permit: ['#'] logger: path: var/log/baetyl/localhub-service.log level: "debug"
Configuration file location for Baetyl-Remote-MQTT module is:
The configuration of Baetyl-Remote-MQTT module is as follow:
name: remote-iothub hub: address: tcp://localhub:1883 username: test password: hahaha remotes: - name: iothub address: 'ssl://xxxxxx.mqtt.iot.bj.baidubce.com:1884' clientid: remote-iothub-1 username: xxxx/test ca: var/db/baetyl/cert/ca.pem cert: var/db/baetyl/cert/client.pem key: var/db/baetyl/cert/client.key rules: - hub: subscriptions: - topic: t1 remote: name: iothub subscriptions: - topic: t2 qos: 1 logger: path: var/log/baetyl/remote-service.log level: 'debug'
According to the configuration of the above, it means that the Baetyl-Remote-MQTT module subscribes the topic
t1 from the Baetyl-Hub module, subscribes the topic
t2 from Baidu IoTHub. When MQTTBox publishes a message to the topic
t1, the Baetyl-Hub module will receive this message and forward it to Baidu IoTHub via Baetyl-Remote-MQTT module, and MQTT.fx will also receive this message(suppose MQTT.fx has already subscribed the topic
t1 before) from Baidu IoTHub. Similarly, When we use MQTT.fx to publish a message to the topic
t2, then Baidu IoTHub will receive it and forward it to the Baetyl-Hub module via Baetyl-Remote-MQTT module. Finally, MQTTBox will receive this message(suppose MQTTBox has already subscribed the topic
In a word, from MQTTBox publishes a message to the topic
t1, to MQTT.fx receives the message, the routing path of the message are as follows.
MQTTBox -> Baetyl-Hub module -> Baetyl-Remote-MQTT module -> Baidu IoTHub -> MQTT.fx
Similarly, from MQTT.fx publishes a message to the topic
t2, to MQTTBox receives the message, the routing path of the message are as follows.
MQTT.fx -> Baidu IoTHub -> Baetyl-Remote-MQTT module -> Baetyl-Hub module -> MQTTBox
Establish a Connection between MQTT.fx and Baidu IoTHub¶
As described in
Step 1, Step 2, the detailed contents of the connection between MQTT.fx and Baidu IoTHub are as follows.
Create endpoint via Baidu IoTHub
Configuration of MQTT.fx
After set the configuration of MQTT.fx, click
Apply button, then click
Connect button, and wait for the connecting. Also, we can check if the connection status is OK via the color button. When the button’s color change to Green, that is to say, the connection is established. Then switch to the
Subscribe page and subscribe the topic
t1. More detailed contents are shown below.
Successfully establish a connection between MQTT.fx and Baidu IoTHub
Establish a Connection between MQTTBox and the Baetyl-Hub module¶
As described in
Step 3, the Baetyl-Hub module and Baetyl-Remote-MQTT module also loaded when Baetyl started. Also, we can lookup the running status of Baetyl through the command
sudo systemctl status baetyl.
lookup the running status of Baetyl
In addition, we can execute the command
docker stats to view the list of docker containers currently running on the system.
View the list of docker containers currently running
After Baetyl successfully startup, set the configuration of connection, then establish the connection with the Baetyl-Hub module and subscribe the topic
MQTTBox successfully subscribe the topic t2
Message Synchronize Test¶
Here, MQTT.fx and MQTTBox will be used as message publishers, and the other one will be used as a message receiver.
MQTT.fx publishes message, and MQTTBox receives message
Firstly, using MQTT.fx publishes a message
This message is from MQTT.fx. to the topic
Publishing a message to the topic t2 via MQTT.fx
At the same time, observing the message receiving status of MQTTBox via the topic
MQTTBox successfully received the message
MQTTBox publishes message, and MQTT.fx receives message
Similarly, publishing the message
This message is from MQTTBox. to the topic
t1 via MQTTBox.
Publishing a message to the topic t1 via MQTTBox
Then we can observe the message receiving status of MQTT.fx via the topic
MQTT.fx successfully received the message
In summary, both MQTT.fx and MQTTBox have correctly received the specified message, and the content is consistent.