Microservices Engine:Route gRPC traffic through a cloud-native gateway

apiVersion: apps/v1
kind: Deployment
metadata:
  name: grpcbin
spec:
  replicas: 1
  selector:
    matchLabels:
      app: grpcbin
  template:
    metadata:
      labels:
        app: grpcbin
    spec:
      serviceAccountName: grpcbin
      containers:
      - image: docker.io/moul/grpcbin
        imagePullPolicy: IfNotPresent
        name: grpcbin
        ports:
        - containerPort: 9000
        - containerPort: 9001
        resources:
            requests:
              cpu: '1'
              memory: 2Gi
            limit:
              cpu: '1'
              memory: 2Gi
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: grpcbin
---
apiVersion: v1
kind: Service
metadata:
  name: grpcbin-grpc
  labels:
    app: grpcbin
spec:
  ports:
  - name: grpc
    port: 9000
    targetPort: 9000
  selector:
    app: grpcbin

syntax = "proto3";

package grpcbin;

service GRPCBin {
  rpc Index(EmptyMessage) returns (IndexReply) {}
  // Called without parameters. Returns an empty response.
  rpc Empty(EmptyMessage) returns (EmptyMessage) {}
  // Echoes the request parameters back.
  rpc DummyUnary(DummyMessage) returns (DummyMessage) {}
  // Server streaming: returns 10 response messages.
  rpc DummyServerStream(DummyMessage) returns (stream DummyMessage) {}
  // Client streaming: receives 10 requests, returns the last request body.
  rpc DummyClientStream(stream DummyMessage) returns (DummyMessage) {}
  // Bidirectional streaming.
  rpc DummyBidirectionalStreamStream(stream DummyMessage) returns (stream DummyMessage) {}
  // Returns a specified gRPC error.
  rpc SpecificError(SpecificErrorRequest) returns (EmptyMessage) {}
  // Returns a random error.
  rpc RandomError(EmptyMessage) returns (EmptyMessage) {}
  // Returns request headers.
  rpc HeadersUnary(EmptyMessage) returns (HeadersMessage) {}
  // Returns no response.
  rpc NoResponseUnary(EmptyMessage) returns (EmptyMessage) {}
}

message HeadersMessage {
  message Values {
    repeated string values = 1;
  }
  map<string, Values> Metadata = 1;
}

message SpecificErrorRequest {
  uint32 code = 1;
  string reason = 2;
}

message EmptyMessage {}

message DummyMessage {
  message Sub {
    string f_string = 1;
  }
  enum Enum {
    ENUM_0 = 0;
    ENUM_1 = 1;
    ENUM_2 = 2;
  }
  string f_string = 1;
  repeated string f_strings = 2;
  int32 f_int32 = 3;
  repeated int32 f_int32s = 4;
  Enum f_enum = 5;
  repeated Enum f_enums = 6;
  Sub f_sub = 7;
  repeated Sub f_subs = 8;
  bool f_bool = 9;
  repeated bool f_bools = 10;
  int64 f_int64 = 11;
  repeated int64 f_int64s= 12;
  bytes f_bytes = 13;
  repeated bytes f_bytess = 14;
  float f_float = 15;
  repeated float f_floats = 16;
}

message IndexReply {
  message Endpoint {
    string path = 1;
    string description = 2;
  }
  string description = 1;
  repeated Endpoint endpoints = 2;
}