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Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

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grpc

Caution

Starting on k6 v0.49, the experimental module k6/experimental/grpc has been graduated, and its functionality is now available in the k6/net/grpc module. The k6/experimental/grpc is deprecated and will be removed in v0.51.0.

To migrate your scripts, replace all k6/experimental/grpc imports with k6/net/grpc.

The k6/experimental/grpc module is an extension of the k6/net/grpc. It provides a gRPC client for Remote Procedure Calls (RPC) over HTTP/2.

The key-difference between the two modules is new Stream class, which provides client and server streaming support. Our long-term goal is to make this module part of k6 core, and long-term to replace the k6/net/grpc module.

Class/MethodDescription
ClientgRPC client used for making RPC calls to a gRPC Server.
Client.load(importPaths, …protoFiles)Loads and parses the given protocol buffer definitions to be made available for RPC requests.
Client.connect(address [,params])Connects to a given gRPC service.
Client.invoke(url, request [,params])Makes a unary RPC for the given service/method and returns a Response.
Client.close()Close the connection to the gRPC service.
ParamsRPC Request specific options.
ResponseReturned by RPC requests.
ConstantsDefine constants to distinguish between gRPC Response statuses.
StreamCreates a new GRPC stream.
Stream.on(event, handler)Adds a new listener to one of the possible stream event’s.
Stream.write(message)Writes a message to the stream.
Stream.end()Signals to server that client finished sending.

Metrics

k6 takes specific measurements for gRPC requests. For the complete list, refer to the Metrics reference.

Example

JavaScript 
import grpc from 'k6/experimental/grpc';
import { check, sleep } from 'k6';

const client = new grpc.Client();
client.load(['definitions'], 'hello.proto');

export default () => {
  client.connect('grpcbin.test.k6.io:9001', {
    // plaintext: false
  });

  const data = { greeting: 'Bert' };
  const response = client.invoke('hello.HelloService/SayHello', data);

  check(response, {
    'status is OK': (r) => r && r.status === grpc.StatusOK,
  });

  console.log(JSON.stringify(response.message));

  client.close();
  sleep(1);
};