A vanilla grpc servier in Kotlin and an envoy grpc-JSON/HTTP transcoder which allows a RESTful JSON API client to send requests to Envoy over HTTP and get proxied to a gRPC service

A Kotlin simple grpc server which could handle both REST and gRPC request thanks to the grpc-json-transcoder

• maven
• docker
• kotlin
• envoy
• protoc
• googleapis

• Installation
• Usage

• mvn clean package
• java -jar target/kgrpc-0.1.1-jar-with-dependencies.jar

• docker build . -t kgrpc-envoy
• docker run --publish 9901:9901 --publish 51051:51051 --rm kgrpc-envoy

grpcurl --plaintext -d '{str: abceisaname}' localhost:50051 com.knitehias.grpc.strlen.StrLenService/Len

curl -X GET -v -H "Content-Type: application/json" localhost:51051/v1/len/abceisaname

The little Kotlin gRPC server will return the length of the inputing string.

A Kotlin simple grpc server which could handle both REST and gRPC request thanks to the grpc-json-transcoder

googleapis

• curl -X POST http://localhost:9901/clusters

• curl -X POST http://localhost:9901/logging?connection=debug

I want to connect from a container to a service on the host
The host has a changing IP address, or none if you have no network access. We recommend that you connect to the special DNS name host.docker.internal which resolves to the internal >IP address used by the host. This is for development purpose and does not work in a production environment outside of Docker Desktop.
You can also reach the gateway using gateway.docker.internal.