Streaming delivery of xDS API updates via gRPC

Delivery of updates via the filesystem, REST-JSON or gRPC endpoints.

load and resource utilization reporting to management servers.

Stronger consistency and ordering properties when needed

Bootstrap configuration

A key concept in the Bootstrap message is the distinction between static and dynamic resources.

Extension configuration

Each configuration resource in Envoy has a type URL in the typed_config. This type corresponds to a versioned schema.

In case the control plane lacks the schema definitions for an extension, udpa.type.v1.TypedStruct should be used as a generic container.

xDS API endpoints

POST /envoy.service.cluster.v3.ClusterDiscoveryService/StreamClusters

POST /envoy.service.endpoint.v3.EndpointDiscoveryService/StreamEndpoints

POST /envoy.service.listener.v3.ListenerDiscoveryService/StreamListeners

POST /envoy.service.route.v3.RouteDiscoveryService/StreamRoutes

POST /envoy.service.route.v3.ScopedRoutesDiscoveryService/StreamScopedRoutes

POST /envoy.service.secret.v3.SecretDiscoveryService/StreamSecrets

POST /envoy.service.runtime.v3.RuntimeDiscoveryService/StreamRuntime

POST /envoy.service.discovery.v3.AggregatedDiscoveryService/StreamAggregatedResources

Delta endpoints

xDS TTL