grpc-echo-service

grpc-service

For more information about service invocation see the Dapr docs

You can replicate this demo on any Kubernetes cluster configured with Dapr. To demo the cross-namespace service invocation with external API gateway you will need "dapr'ized' cluster ingress (ingress with Dapr sidecar). You can setup fully configured Dapr cluster with all these dependencies using included Dapr cluster setup.

Run

To run this demo in Dapr, run:

dapr run \
    --app-id echo \
    --app-port 50001 \
    --app-protocol grpc \
    --dapr-http-port 3500 \
    --components-path ./config \
    go run main.go

Deploy

To deploy this demo, first setup the echo namespace:

kubectl apply -f deployment/space.yaml

Then deploy and wait for the echo-service app pod to be ready:

kubectl apply -f deployment/app.yaml
kubectl rollout status deployment/echo-service -n echo 

If you have changed an existing component, make sure to reload the ingress and wait until the new version is ready

kubectl rollout restart deployment/echo-service -n echo 
kubectl rollout status deployment/echo-service -n echo 

Follow logs

kubectl logs -l app=echo-service -c service -f -n echo

In a separate terminal session export API token

export API_TOKEN=$(kubectl get secret dapr-api-token -n nginx -o jsonpath="{.data.token}" | base64 --decode)

And invoke the service

curl -d '{ "message": "ping" }' \
     -H "Content-type: application/json" \
     -H "dapr-api-token: ${API_TOKEN}" \
     "https://api.demo.dapr.team/v1.0/invoke/echo-service.echo/method/echo"

Notice the use of echo-service.echo namespace in the service invocation

The response should include the sent message

{ 
    "message": "ping" 
}

And the logs

Invocation (ContentType:application/json, Verb:POST, QueryString:map[], Data:{ "message": "ping" })

Disclaimer

This is my personal project and it does not represent my employer. While I do my best to ensure that everything works, I take no responsibility for issues caused by this code.

License

This software is released under the MIT