SDEWAN central controller provides central control of SDEWAN overlay networks by automatically configuring the SDEWAN CNFs located in edge location clusters and hub clusters:
- To create secure overlays where each overlay connects application and hub clusters together.
- To allow application connectivity with external entities and entities of other clusters.
System Architecture
SDEWAN central controller includes the following components as showed in below diagram:
- Web UI: a HTML5 based web UI to provide configuration of Application Cluster Registration, Hub Registration, Overlay, Application/Service Registration and Status tracking.
- API Server: Exports Restful API for Application Cluster management, Hub management, Overlay management, Status monitoring management, logging.
- Scheduler Manager: a daemon service which accepts request from API server (through RPC) then generates relevant K8s CRs of SD-EWAN CNFs of various hubs and edges to establish the tunnels.
- SDEWAN Management DB: a database to store information such as edge clusters, hubs, overlays, ip addresses, application/services etc.
System Design
Working Flow
Assumption:
Environment Setup (Pre-condition)
Flow: Register Hub
Flow: Register Edge Location
Flow: Register Application Service
Flow: Register Overlay