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Version: v1.4

Intermediate Interface Layer

The intermediate interface layer adapts the KubeEdge cluster to Dayu's runtime deployment and communication model. The current system uses the matched dayu-sedna v1.1 and dayu-edgemesh v1.1 releases.

Lower-layer structure

Sedna runtime services​

dayu.sh uses the configured Sedna support CRD to start the long-lived platform services. Application runtime workers are different: Backend renders Scheduler, Generator, Controller, Processor, Distributor, and Monitor instances as immutable sedna.io/v1alpha1 RuntimeService resources.

Sedna Global Manager and Local Controller coordinate each runtime revision. Backend does not publish a worker until Sedna reports the expected specification and exact RuntimeService, Service, and Pod identities with both Activated=True and Ready=True. This prevents a running but unroutable Pod from entering the active runtime.

EdgeMesh routing​

EdgeMesh provides service communication across cloud and edge nodes. The Dayu integration acknowledges the exact Service and Pod identity created for a RuntimeService, rather than treating workload creation alone as readiness. Scheduler records the acknowledged endpoints in a versioned RuntimeDirectory, and runtime tasks carry only those exact routes.

Runtime workers do not list Kubernetes objects, refresh a topology cache, or choose a replacement route. Kubernetes access belongs to Backend; route authority belongs to Scheduler. Missing or stale route identity is therefore reported as an error instead of silently falling back to another replica.