Bellow is the configuration diagram of Open Cloud Platform(K-PaaS).

» Architechture

» Function and Role of Components

°  Edge Cluster(Cloud side. Edge Side)

1 . EdgeHub
- A WebSocket client that interacts with cloud services for edge computing (such as the Edge Controller in the KubeEdge architecture)
This includes synchronizing cloud-side resource updates to the edge and reporting edge-side host and device status changes to the cloud.

2. Edged
- An agent that manages containerized applications running on edge nodes.

3. EventBus
- This MQTT client interacts with the MQTT server (Mosquitto) to provide publish and subscribe functionality for other components.

4. ServicesBus
- An HTTP client that interacts with HTTP servers (REST), providing HTTP client functionality to cloud components to reach HTTP servers running at the edge.

5.  DeviceTwin
- Saves device status and synchronizes device status to the cloud. It also provides a query interface for applications.

6. MetaManager
-  The message processor between edged and edgehub also handles metadata storage and retrieval with a lightweight database (SQLite).

°  Middleware

 
1. CloudHub
- An WebSocket server that observes changes on the cloud side, caches them, and sends messages to EdgeHub.

2. EdgeController
- An extended Kubernetes controller that manages edge node and pod metadata to enable data to target specific edge nodes.

3. DeviceController
- An extended Kubernetes controller that manages devices to enable synchronization of device metadata and status data between edge and cloud.
 

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