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 see the full list of auto-generated clients (Dapr SDKs).

The Dapr runtime implements a proto service that apps can communicate with via gRPC.

Not only can you call Dapr via gRPC, Dapr can communicate with an application via gRPC. To do that, the app needs to host a gRPC server and implement the Dapr appcallback service

Configuring Dapr to communicate with an app via gRPC

• Self-hosted
• Kubernetes

dapr run --app-protocol grpc --app-port 5005 node app.js

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"
#...

Next steps