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main.go
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main.go
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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
//go:generate protoc -I ../grpc_testing --go_out=plugins=grpc:../grpc_testing ../grpc_testing/metrics.proto
// client starts an interop client to do stress test and a metrics server to report qps.
package main
import (
"context"
"flag"
"fmt"
"math/rand"
"net"
"strconv"
"strings"
"sync"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/interop"
testpb "google.golang.org/grpc/interop/grpc_testing"
"google.golang.org/grpc/status"
metricspb "google.golang.org/grpc/stress/grpc_testing"
"google.golang.org/grpc/testdata"
)
var (
serverAddresses = flag.String("server_addresses", "localhost:8080", "a list of server addresses")
testCases = flag.String("test_cases", "", "a list of test cases along with the relative weights")
testDurationSecs = flag.Int("test_duration_secs", -1, "test duration in seconds")
numChannelsPerServer = flag.Int("num_channels_per_server", 1, "Number of channels (i.e connections) to each server")
numStubsPerChannel = flag.Int("num_stubs_per_channel", 1, "Number of client stubs per each connection to server")
metricsPort = flag.Int("metrics_port", 8081, "The port at which the stress client exposes QPS metrics")
useTLS = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP")
testCA = flag.Bool("use_test_ca", false, "Whether to replace platform root CAs with test CA as the CA root")
tlsServerName = flag.String("server_host_override", "foo.test.google.fr", "The server name use to verify the hostname returned by TLS handshake if it is not empty. Otherwise, --server_host is used.")
caFile = flag.String("ca_file", "", "The file containing the CA root cert file")
)
// testCaseWithWeight contains the test case type and its weight.
type testCaseWithWeight struct {
name string
weight int
}
// parseTestCases converts test case string to a list of struct testCaseWithWeight.
func parseTestCases(testCaseString string) []testCaseWithWeight {
testCaseStrings := strings.Split(testCaseString, ",")
testCases := make([]testCaseWithWeight, len(testCaseStrings))
for i, str := range testCaseStrings {
testCase := strings.Split(str, ":")
if len(testCase) != 2 {
panic(fmt.Sprintf("invalid test case with weight: %s", str))
}
// Check if test case is supported.
switch testCase[0] {
case
"empty_unary",
"large_unary",
"client_streaming",
"server_streaming",
"ping_pong",
"empty_stream",
"timeout_on_sleeping_server",
"cancel_after_begin",
"cancel_after_first_response",
"status_code_and_message",
"custom_metadata":
default:
panic(fmt.Sprintf("unknown test type: %s", testCase[0]))
}
testCases[i].name = testCase[0]
w, err := strconv.Atoi(testCase[1])
if err != nil {
panic(fmt.Sprintf("%v", err))
}
testCases[i].weight = w
}
return testCases
}
// weightedRandomTestSelector defines a weighted random selector for test case types.
type weightedRandomTestSelector struct {
tests []testCaseWithWeight
totalWeight int
}
// newWeightedRandomTestSelector constructs a weightedRandomTestSelector with the given list of testCaseWithWeight.
func newWeightedRandomTestSelector(tests []testCaseWithWeight) *weightedRandomTestSelector {
var totalWeight int
for _, t := range tests {
totalWeight += t.weight
}
rand.Seed(time.Now().UnixNano())
return &weightedRandomTestSelector{tests, totalWeight}
}
func (selector weightedRandomTestSelector) getNextTest() string {
random := rand.Intn(selector.totalWeight)
var weightSofar int
for _, test := range selector.tests {
weightSofar += test.weight
if random < weightSofar {
return test.name
}
}
panic("no test case selected by weightedRandomTestSelector")
}
// gauge stores the qps of one interop client (one stub).
type gauge struct {
mutex sync.RWMutex
val int64
}
func (g *gauge) set(v int64) {
g.mutex.Lock()
defer g.mutex.Unlock()
g.val = v
}
func (g *gauge) get() int64 {
g.mutex.RLock()
defer g.mutex.RUnlock()
return g.val
}
// server implements metrics server functions.
type server struct {
mutex sync.RWMutex
// gauges is a map from /stress_test/server_<n>/channel_<n>/stub_<n>/qps to its qps gauge.
gauges map[string]*gauge
}
// newMetricsServer returns a new metrics server.
func newMetricsServer() *server {
return &server{gauges: make(map[string]*gauge)}
}
// GetAllGauges returns all gauges.
func (s *server) GetAllGauges(in *metricspb.EmptyMessage, stream metricspb.MetricsService_GetAllGaugesServer) error {
s.mutex.RLock()
defer s.mutex.RUnlock()
for name, gauge := range s.gauges {
if err := stream.Send(&metricspb.GaugeResponse{Name: name, Value: &metricspb.GaugeResponse_LongValue{LongValue: gauge.get()}}); err != nil {
return err
}
}
return nil
}
// GetGauge returns the gauge for the given name.
func (s *server) GetGauge(ctx context.Context, in *metricspb.GaugeRequest) (*metricspb.GaugeResponse, error) {
s.mutex.RLock()
defer s.mutex.RUnlock()
if g, ok := s.gauges[in.Name]; ok {
return &metricspb.GaugeResponse{Name: in.Name, Value: &metricspb.GaugeResponse_LongValue{LongValue: g.get()}}, nil
}
return nil, status.Errorf(codes.InvalidArgument, "gauge with name %s not found", in.Name)
}
// createGauge creates a gauge using the given name in metrics server.
func (s *server) createGauge(name string) *gauge {
s.mutex.Lock()
defer s.mutex.Unlock()
if _, ok := s.gauges[name]; ok {
// gauge already exists.
panic(fmt.Sprintf("gauge %s already exists", name))
}
var g gauge
s.gauges[name] = &g
return &g
}
func startServer(server *server, port int) {
lis, err := net.Listen("tcp", ":"+strconv.Itoa(port))
if err != nil {
grpclog.Fatalf("failed to listen: %v", err)
}
s := grpc.NewServer()
metricspb.RegisterMetricsServiceServer(s, server)
s.Serve(lis)
}
// performRPCs uses weightedRandomTestSelector to select test case and runs the tests.
func performRPCs(gauge *gauge, conn *grpc.ClientConn, selector *weightedRandomTestSelector, stop <-chan bool) {
client := testpb.NewTestServiceClient(conn)
var numCalls int64
startTime := time.Now()
for {
test := selector.getNextTest()
switch test {
case "empty_unary":
interop.DoEmptyUnaryCall(client, grpc.WaitForReady(true))
case "large_unary":
interop.DoLargeUnaryCall(client, grpc.WaitForReady(true))
case "client_streaming":
interop.DoClientStreaming(client, grpc.WaitForReady(true))
case "server_streaming":
interop.DoServerStreaming(client, grpc.WaitForReady(true))
case "ping_pong":
interop.DoPingPong(client, grpc.WaitForReady(true))
case "empty_stream":
interop.DoEmptyStream(client, grpc.WaitForReady(true))
case "timeout_on_sleeping_server":
interop.DoTimeoutOnSleepingServer(client, grpc.WaitForReady(true))
case "cancel_after_begin":
interop.DoCancelAfterBegin(client, grpc.WaitForReady(true))
case "cancel_after_first_response":
interop.DoCancelAfterFirstResponse(client, grpc.WaitForReady(true))
case "status_code_and_message":
interop.DoStatusCodeAndMessage(client, grpc.WaitForReady(true))
case "custom_metadata":
interop.DoCustomMetadata(client, grpc.WaitForReady(true))
}
numCalls++
gauge.set(int64(float64(numCalls) / time.Since(startTime).Seconds()))
select {
case <-stop:
return
default:
}
}
}
func logParameterInfo(addresses []string, tests []testCaseWithWeight) {
grpclog.Infof("server_addresses: %s", *serverAddresses)
grpclog.Infof("test_cases: %s", *testCases)
grpclog.Infof("test_duration_secs: %d", *testDurationSecs)
grpclog.Infof("num_channels_per_server: %d", *numChannelsPerServer)
grpclog.Infof("num_stubs_per_channel: %d", *numStubsPerChannel)
grpclog.Infof("metrics_port: %d", *metricsPort)
grpclog.Infof("use_tls: %t", *useTLS)
grpclog.Infof("use_test_ca: %t", *testCA)
grpclog.Infof("server_host_override: %s", *tlsServerName)
grpclog.Infoln("addresses:")
for i, addr := range addresses {
grpclog.Infof("%d. %s\n", i+1, addr)
}
grpclog.Infoln("tests:")
for i, test := range tests {
grpclog.Infof("%d. %v\n", i+1, test)
}
}
func newConn(address string, useTLS, testCA bool, tlsServerName string) (*grpc.ClientConn, error) {
var opts []grpc.DialOption
if useTLS {
var sn string
if tlsServerName != "" {
sn = tlsServerName
}
var creds credentials.TransportCredentials
if testCA {
var err error
if *caFile == "" {
*caFile = testdata.Path("ca.pem")
}
creds, err = credentials.NewClientTLSFromFile(*caFile, sn)
if err != nil {
grpclog.Fatalf("Failed to create TLS credentials %v", err)
}
} else {
creds = credentials.NewClientTLSFromCert(nil, sn)
}
opts = append(opts, grpc.WithTransportCredentials(creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
return grpc.Dial(address, opts...)
}
func main() {
flag.Parse()
addresses := strings.Split(*serverAddresses, ",")
tests := parseTestCases(*testCases)
logParameterInfo(addresses, tests)
testSelector := newWeightedRandomTestSelector(tests)
metricsServer := newMetricsServer()
var wg sync.WaitGroup
wg.Add(len(addresses) * *numChannelsPerServer * *numStubsPerChannel)
stop := make(chan bool)
for serverIndex, address := range addresses {
for connIndex := 0; connIndex < *numChannelsPerServer; connIndex++ {
conn, err := newConn(address, *useTLS, *testCA, *tlsServerName)
if err != nil {
grpclog.Fatalf("Fail to dial: %v", err)
}
defer conn.Close()
for clientIndex := 0; clientIndex < *numStubsPerChannel; clientIndex++ {
name := fmt.Sprintf("/stress_test/server_%d/channel_%d/stub_%d/qps", serverIndex+1, connIndex+1, clientIndex+1)
go func() {
defer wg.Done()
g := metricsServer.createGauge(name)
performRPCs(g, conn, testSelector, stop)
}()
}
}
}
go startServer(metricsServer, *metricsPort)
if *testDurationSecs > 0 {
time.Sleep(time.Duration(*testDurationSecs) * time.Second)
close(stop)
}
wg.Wait()
grpclog.Infof(" ===== ALL DONE ===== ")
}