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How-To: Configure Dapr to use gRPC
Dapr implements both an HTTP and a gRPC API for local calls. gRPC is useful for low-latency, high performance scenarios and has language integration using the proto clients.
You can find a list of auto-generated clients here.
The Dapr runtime implements a proto service that apps can communicate with via gRPC.
In addition to calling Dapr via gRPC, Dapr can communicate with an application via gRPC. To do that, the app needs to host a gRPC server and implements the Dapr appcallback service
Configuring Dapr to communicate with an app via gRPC
When running in self hosted mode, use the
--app-protocol flag to tell Dapr to use gRPC to talk to the app:
dapr run --app-protocol grpc --app-port 5005 node app.js
This tells Dapr to communicate with your app via gRPC over port
On Kubernetes, set the following annotations in your deployment YAML:
apiVersion: apps/v1 kind: Deployment metadata: name: myapp namespace: default labels: app: myapp spec: replicas: 1 selector: matchLabels: app: myapp template: metadata: labels: app: myapp annotations: dapr.io/enabled: "true" dapr.io/app-id: "myapp" dapr.io/app-protocol: "grpc" dapr.io/app-port: "5005" ...