| /* |
| * |
| * Copyright 2017 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. |
| * |
| */ |
| |
| #include <memory> |
| #include <mutex> |
| #include <set> |
| #include <sstream> |
| #include <thread> |
| |
| #include <grpc/grpc.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/time.h> |
| #include <grpcpp/channel.h> |
| #include <grpcpp/client_context.h> |
| #include <grpcpp/create_channel.h> |
| #include <grpcpp/server.h> |
| #include <grpcpp/server_builder.h> |
| |
| #include "src/core/ext/filters/client_channel/parse_address.h" |
| #include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h" |
| #include "src/core/ext/filters/client_channel/server_address.h" |
| #include "src/core/lib/gpr/env.h" |
| #include "src/core/lib/gprpp/ref_counted_ptr.h" |
| #include "src/core/lib/iomgr/sockaddr.h" |
| #include "src/core/lib/security/credentials/fake/fake_credentials.h" |
| #include "src/cpp/client/secure_credentials.h" |
| #include "src/cpp/server/secure_server_credentials.h" |
| |
| #include "test/core/util/port.h" |
| #include "test/core/util/test_config.h" |
| #include "test/cpp/end2end/test_service_impl.h" |
| |
| #include "src/proto/grpc/lb/v1/load_balancer.grpc.pb.h" |
| #include "src/proto/grpc/testing/echo.grpc.pb.h" |
| |
| #include <gmock/gmock.h> |
| #include <gtest/gtest.h> |
| |
| // TODO(dgq): Other scenarios in need of testing: |
| // - Send a serverlist with faulty ip:port addresses (port > 2^16, etc). |
| // - Test reception of invalid serverlist |
| // - Test against a non-LB server. |
| // - Random LB server closing the stream unexpectedly. |
| // |
| // Findings from end to end testing to be covered here: |
| // - Handling of LB servers restart, including reconnection after backing-off |
| // retries. |
| // - Destruction of load balanced channel (and therefore of xds instance) |
| // while: |
| // 1) the internal LB call is still active. This should work by virtue |
| // of the weak reference the LB call holds. The call should be terminated as |
| // part of the xds shutdown process. |
| // 2) the retry timer is active. Again, the weak reference it holds should |
| // prevent a premature call to \a glb_destroy. |
| |
| using std::chrono::system_clock; |
| |
| using grpc::lb::v1::LoadBalanceRequest; |
| using grpc::lb::v1::LoadBalanceResponse; |
| using grpc::lb::v1::LoadBalancer; |
| |
| namespace grpc { |
| namespace testing { |
| namespace { |
| |
| template <typename ServiceType> |
| class CountedService : public ServiceType { |
| public: |
| size_t request_count() { |
| std::unique_lock<std::mutex> lock(mu_); |
| return request_count_; |
| } |
| |
| size_t response_count() { |
| std::unique_lock<std::mutex> lock(mu_); |
| return response_count_; |
| } |
| |
| void IncreaseResponseCount() { |
| std::unique_lock<std::mutex> lock(mu_); |
| ++response_count_; |
| } |
| void IncreaseRequestCount() { |
| std::unique_lock<std::mutex> lock(mu_); |
| ++request_count_; |
| } |
| |
| void ResetCounters() { |
| std::unique_lock<std::mutex> lock(mu_); |
| request_count_ = 0; |
| response_count_ = 0; |
| } |
| |
| protected: |
| std::mutex mu_; |
| |
| private: |
| size_t request_count_ = 0; |
| size_t response_count_ = 0; |
| }; |
| |
| using BackendService = CountedService<TestServiceImpl>; |
| using BalancerService = CountedService<LoadBalancer::Service>; |
| |
| const char g_kCallCredsMdKey[] = "Balancer should not ..."; |
| const char g_kCallCredsMdValue[] = "... receive me"; |
| |
| class BackendServiceImpl : public BackendService { |
| public: |
| BackendServiceImpl() {} |
| |
| Status Echo(ServerContext* context, const EchoRequest* request, |
| EchoResponse* response) override { |
| // Backend should receive the call credentials metadata. |
| auto call_credentials_entry = |
| context->client_metadata().find(g_kCallCredsMdKey); |
| EXPECT_NE(call_credentials_entry, context->client_metadata().end()); |
| if (call_credentials_entry != context->client_metadata().end()) { |
| EXPECT_EQ(call_credentials_entry->second, g_kCallCredsMdValue); |
| } |
| IncreaseRequestCount(); |
| const auto status = TestServiceImpl::Echo(context, request, response); |
| IncreaseResponseCount(); |
| AddClient(context->peer()); |
| return status; |
| } |
| |
| void Shutdown() {} |
| |
| std::set<grpc::string> clients() { |
| std::unique_lock<std::mutex> lock(clients_mu_); |
| return clients_; |
| } |
| |
| private: |
| void AddClient(const grpc::string& client) { |
| std::unique_lock<std::mutex> lock(clients_mu_); |
| clients_.insert(client); |
| } |
| |
| std::mutex mu_; |
| std::mutex clients_mu_; |
| std::set<grpc::string> clients_; |
| }; |
| |
| grpc::string Ip4ToPackedString(const char* ip_str) { |
| struct in_addr ip4; |
| GPR_ASSERT(inet_pton(AF_INET, ip_str, &ip4) == 1); |
| return grpc::string(reinterpret_cast<const char*>(&ip4), sizeof(ip4)); |
| } |
| |
| struct ClientStats { |
| size_t num_calls_started = 0; |
| size_t num_calls_finished = 0; |
| size_t num_calls_finished_with_client_failed_to_send = 0; |
| size_t num_calls_finished_known_received = 0; |
| std::map<grpc::string, size_t> drop_token_counts; |
| |
| ClientStats& operator+=(const ClientStats& other) { |
| num_calls_started += other.num_calls_started; |
| num_calls_finished += other.num_calls_finished; |
| num_calls_finished_with_client_failed_to_send += |
| other.num_calls_finished_with_client_failed_to_send; |
| num_calls_finished_known_received += |
| other.num_calls_finished_known_received; |
| for (const auto& p : other.drop_token_counts) { |
| drop_token_counts[p.first] += p.second; |
| } |
| return *this; |
| } |
| |
| void Reset() { |
| num_calls_started = 0; |
| num_calls_finished = 0; |
| num_calls_finished_with_client_failed_to_send = 0; |
| num_calls_finished_known_received = 0; |
| drop_token_counts.clear(); |
| } |
| }; |
| |
| class BalancerServiceImpl : public BalancerService { |
| public: |
| using Stream = ServerReaderWriter<LoadBalanceResponse, LoadBalanceRequest>; |
| using ResponseDelayPair = std::pair<LoadBalanceResponse, int>; |
| |
| explicit BalancerServiceImpl(int client_load_reporting_interval_seconds) |
| : client_load_reporting_interval_seconds_( |
| client_load_reporting_interval_seconds) {} |
| |
| Status BalanceLoad(ServerContext* context, Stream* stream) override { |
| // TODO(juanlishen): Clean up the scoping. |
| gpr_log(GPR_INFO, "LB[%p]: BalanceLoad", this); |
| { |
| std::unique_lock<std::mutex> lock(mu_); |
| if (serverlist_done_) goto done; |
| } |
| { |
| // Balancer shouldn't receive the call credentials metadata. |
| EXPECT_EQ(context->client_metadata().find(g_kCallCredsMdKey), |
| context->client_metadata().end()); |
| LoadBalanceRequest request; |
| std::vector<ResponseDelayPair> responses_and_delays; |
| |
| if (!stream->Read(&request)) { |
| goto done; |
| } |
| IncreaseRequestCount(); |
| gpr_log(GPR_INFO, "LB[%p]: received initial message '%s'", this, |
| request.DebugString().c_str()); |
| |
| { |
| LoadBalanceResponse initial_response; |
| initial_response.mutable_initial_response() |
| ->mutable_client_stats_report_interval() |
| ->set_seconds(client_load_reporting_interval_seconds_); |
| stream->Write(initial_response); |
| } |
| |
| { |
| std::unique_lock<std::mutex> lock(mu_); |
| responses_and_delays = responses_and_delays_; |
| } |
| for (const auto& response_and_delay : responses_and_delays) { |
| SendResponse(stream, response_and_delay.first, |
| response_and_delay.second); |
| } |
| { |
| std::unique_lock<std::mutex> lock(mu_); |
| serverlist_cond_.wait(lock, [this] { return serverlist_done_; }); |
| } |
| |
| if (client_load_reporting_interval_seconds_ > 0) { |
| request.Clear(); |
| if (stream->Read(&request)) { |
| gpr_log(GPR_INFO, "LB[%p]: received client load report message '%s'", |
| this, request.DebugString().c_str()); |
| GPR_ASSERT(request.has_client_stats()); |
| // We need to acquire the lock here in order to prevent the notify_one |
| // below from firing before its corresponding wait is executed. |
| std::lock_guard<std::mutex> lock(mu_); |
| client_stats_.num_calls_started += |
| request.client_stats().num_calls_started(); |
| client_stats_.num_calls_finished += |
| request.client_stats().num_calls_finished(); |
| client_stats_.num_calls_finished_with_client_failed_to_send += |
| request.client_stats() |
| .num_calls_finished_with_client_failed_to_send(); |
| client_stats_.num_calls_finished_known_received += |
| request.client_stats().num_calls_finished_known_received(); |
| for (const auto& drop_token_count : |
| request.client_stats().calls_finished_with_drop()) { |
| client_stats_ |
| .drop_token_counts[drop_token_count.load_balance_token()] += |
| drop_token_count.num_calls(); |
| } |
| load_report_ready_ = true; |
| load_report_cond_.notify_one(); |
| } |
| } |
| } |
| done: |
| gpr_log(GPR_INFO, "LB[%p]: done", this); |
| return Status::OK; |
| } |
| |
| void add_response(const LoadBalanceResponse& response, int send_after_ms) { |
| std::unique_lock<std::mutex> lock(mu_); |
| responses_and_delays_.push_back(std::make_pair(response, send_after_ms)); |
| } |
| |
| void Shutdown() { |
| std::unique_lock<std::mutex> lock(mu_); |
| NotifyDoneWithServerlistsLocked(); |
| responses_and_delays_.clear(); |
| client_stats_.Reset(); |
| gpr_log(GPR_INFO, "LB[%p]: shut down", this); |
| } |
| |
| static LoadBalanceResponse BuildResponseForBackends( |
| const std::vector<int>& backend_ports, |
| const std::map<grpc::string, size_t>& drop_token_counts) { |
| LoadBalanceResponse response; |
| for (const auto& drop_token_count : drop_token_counts) { |
| for (size_t i = 0; i < drop_token_count.second; ++i) { |
| auto* server = response.mutable_server_list()->add_servers(); |
| server->set_drop(true); |
| server->set_load_balance_token(drop_token_count.first); |
| } |
| } |
| for (const int& backend_port : backend_ports) { |
| auto* server = response.mutable_server_list()->add_servers(); |
| server->set_ip_address(Ip4ToPackedString("127.0.0.1")); |
| server->set_port(backend_port); |
| static int token_count = 0; |
| char* token; |
| gpr_asprintf(&token, "token%03d", ++token_count); |
| server->set_load_balance_token(token); |
| gpr_free(token); |
| } |
| return response; |
| } |
| |
| const ClientStats& WaitForLoadReport() { |
| std::unique_lock<std::mutex> lock(mu_); |
| load_report_cond_.wait(lock, [this] { return load_report_ready_; }); |
| load_report_ready_ = false; |
| return client_stats_; |
| } |
| |
| void NotifyDoneWithServerlists() { |
| std::lock_guard<std::mutex> lock(mu_); |
| NotifyDoneWithServerlistsLocked(); |
| } |
| |
| void NotifyDoneWithServerlistsLocked() { |
| if (!serverlist_done_) { |
| serverlist_done_ = true; |
| serverlist_cond_.notify_all(); |
| } |
| } |
| |
| private: |
| void SendResponse(Stream* stream, const LoadBalanceResponse& response, |
| int delay_ms) { |
| gpr_log(GPR_INFO, "LB[%p]: sleeping for %d ms...", this, delay_ms); |
| if (delay_ms > 0) { |
| gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(delay_ms)); |
| } |
| gpr_log(GPR_INFO, "LB[%p]: Woke up! Sending response '%s'", this, |
| response.DebugString().c_str()); |
| IncreaseResponseCount(); |
| stream->Write(response); |
| } |
| |
| const int client_load_reporting_interval_seconds_; |
| std::vector<ResponseDelayPair> responses_and_delays_; |
| std::mutex mu_; |
| std::condition_variable load_report_cond_; |
| bool load_report_ready_ = false; |
| std::condition_variable serverlist_cond_; |
| bool serverlist_done_ = false; |
| ClientStats client_stats_; |
| }; |
| |
| class XdsEnd2endTest : public ::testing::Test { |
| protected: |
| XdsEnd2endTest(size_t num_backends, size_t num_balancers, |
| int client_load_reporting_interval_seconds) |
| : server_host_("localhost"), |
| num_backends_(num_backends), |
| num_balancers_(num_balancers), |
| client_load_reporting_interval_seconds_( |
| client_load_reporting_interval_seconds) { |
| // Make the backup poller poll very frequently in order to pick up |
| // updates from all the subchannels's FDs. |
| gpr_setenv("GRPC_CLIENT_CHANNEL_BACKUP_POLL_INTERVAL_MS", "1"); |
| } |
| |
| void SetUp() override { |
| response_generator_ = |
| grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>(); |
| lb_channel_response_generator_ = |
| grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>(); |
| // Start the backends. |
| for (size_t i = 0; i < num_backends_; ++i) { |
| backends_.emplace_back(new ServerThread<BackendServiceImpl>("backend")); |
| backends_.back()->Start(server_host_); |
| } |
| // Start the load balancers. |
| for (size_t i = 0; i < num_balancers_; ++i) { |
| balancers_.emplace_back(new ServerThread<BalancerServiceImpl>( |
| "balancer", client_load_reporting_interval_seconds_)); |
| balancers_.back()->Start(server_host_); |
| } |
| ResetStub(); |
| } |
| |
| void TearDown() override { |
| ShutdownAllBackends(); |
| for (auto& balancer : balancers_) balancer->Shutdown(); |
| } |
| |
| void StartAllBackends() { |
| for (auto& backend : backends_) backend->Start(server_host_); |
| } |
| |
| void StartBackend(size_t index) { backends_[index]->Start(server_host_); } |
| |
| void ShutdownAllBackends() { |
| for (auto& backend : backends_) backend->Shutdown(); |
| } |
| |
| void ShutdownBackend(size_t index) { backends_[index]->Shutdown(); } |
| |
| void ResetStub(int fallback_timeout = 0, |
| const grpc::string& expected_targets = "") { |
| ChannelArguments args; |
| // TODO(juanlishen): Add setter to ChannelArguments. |
| args.SetInt(GRPC_ARG_XDS_FALLBACK_TIMEOUT_MS, fallback_timeout); |
| args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR, |
| response_generator_.get()); |
| if (!expected_targets.empty()) { |
| args.SetString(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS, expected_targets); |
| } |
| std::ostringstream uri; |
| uri << "fake:///" << kApplicationTargetName_; |
| // TODO(dgq): templatize tests to run everything using both secure and |
| // insecure channel credentials. |
| grpc_channel_credentials* channel_creds = |
| grpc_fake_transport_security_credentials_create(); |
| grpc_call_credentials* call_creds = grpc_md_only_test_credentials_create( |
| g_kCallCredsMdKey, g_kCallCredsMdValue, false); |
| std::shared_ptr<ChannelCredentials> creds( |
| new SecureChannelCredentials(grpc_composite_channel_credentials_create( |
| channel_creds, call_creds, nullptr))); |
| call_creds->Unref(); |
| channel_creds->Unref(); |
| channel_ = ::grpc::CreateCustomChannel(uri.str(), creds, args); |
| stub_ = grpc::testing::EchoTestService::NewStub(channel_); |
| } |
| |
| void ResetBackendCounters() { |
| for (auto& backend : backends_) backend->service_.ResetCounters(); |
| } |
| |
| ClientStats WaitForLoadReports() { |
| ClientStats client_stats; |
| for (auto& balancer : balancers_) { |
| client_stats += balancer->service_.WaitForLoadReport(); |
| } |
| return client_stats; |
| } |
| |
| bool SeenAllBackends(size_t start_index = 0, size_t stop_index = 0) { |
| if (stop_index == 0) stop_index = backends_.size(); |
| for (size_t i = start_index; i < stop_index; ++i) { |
| if (backends_[i]->service_.request_count() == 0) return false; |
| } |
| return true; |
| } |
| |
| void SendRpcAndCount(int* num_total, int* num_ok, int* num_failure, |
| int* num_drops) { |
| const Status status = SendRpc(); |
| if (status.ok()) { |
| ++*num_ok; |
| } else { |
| if (status.error_message() == "Call dropped by load balancing policy") { |
| ++*num_drops; |
| } else { |
| ++*num_failure; |
| } |
| } |
| ++*num_total; |
| } |
| |
| std::tuple<int, int, int> WaitForAllBackends(int num_requests_multiple_of = 1, |
| size_t start_index = 0, |
| size_t stop_index = 0) { |
| int num_ok = 0; |
| int num_failure = 0; |
| int num_drops = 0; |
| int num_total = 0; |
| while (!SeenAllBackends(start_index, stop_index)) { |
| SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops); |
| } |
| while (num_total % num_requests_multiple_of != 0) { |
| SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops); |
| } |
| ResetBackendCounters(); |
| gpr_log(GPR_INFO, |
| "Performed %d warm up requests (a multiple of %d) against the " |
| "backends. %d succeeded, %d failed, %d dropped.", |
| num_total, num_requests_multiple_of, num_ok, num_failure, |
| num_drops); |
| return std::make_tuple(num_ok, num_failure, num_drops); |
| } |
| |
| void WaitForBackend(size_t backend_idx) { |
| do { |
| (void)SendRpc(); |
| } while (backends_[backend_idx]->service_.request_count() == 0); |
| ResetBackendCounters(); |
| } |
| |
| grpc_core::ServerAddressList CreateLbAddressesFromPortList( |
| const std::vector<int>& ports) { |
| grpc_core::ServerAddressList addresses; |
| for (int port : ports) { |
| char* lb_uri_str; |
| gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", port); |
| grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true); |
| GPR_ASSERT(lb_uri != nullptr); |
| grpc_resolved_address address; |
| GPR_ASSERT(grpc_parse_uri(lb_uri, &address)); |
| std::vector<grpc_arg> args_to_add; |
| grpc_channel_args* args = grpc_channel_args_copy_and_add( |
| nullptr, args_to_add.data(), args_to_add.size()); |
| addresses.emplace_back(address.addr, address.len, args); |
| grpc_uri_destroy(lb_uri); |
| gpr_free(lb_uri_str); |
| } |
| return addresses; |
| } |
| |
| void SetNextResolution(const std::vector<int>& ports, |
| const char* service_config_json = nullptr, |
| grpc_core::FakeResolverResponseGenerator* |
| lb_channel_response_generator = nullptr) { |
| grpc_core::ExecCtx exec_ctx; |
| grpc_core::Resolver::Result result; |
| result.addresses = CreateLbAddressesFromPortList(ports); |
| if (service_config_json != nullptr) { |
| result.service_config = |
| grpc_core::ServiceConfig::Create(service_config_json); |
| } |
| grpc_arg arg = grpc_core::FakeResolverResponseGenerator::MakeChannelArg( |
| lb_channel_response_generator == nullptr |
| ? lb_channel_response_generator_.get() |
| : lb_channel_response_generator); |
| result.args = grpc_channel_args_copy_and_add(nullptr, &arg, 1); |
| response_generator_->SetResponse(std::move(result)); |
| } |
| |
| void SetNextResolutionForLbChannelAllBalancers( |
| const char* service_config_json = nullptr, |
| grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator = |
| nullptr) { |
| std::vector<int> ports; |
| for (size_t i = 0; i < balancers_.size(); ++i) { |
| ports.emplace_back(balancers_[i]->port_); |
| } |
| SetNextResolutionForLbChannel(ports, service_config_json, |
| lb_channel_response_generator); |
| } |
| |
| void SetNextResolutionForLbChannel( |
| const std::vector<int>& ports, const char* service_config_json = nullptr, |
| grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator = |
| nullptr) { |
| grpc_core::ExecCtx exec_ctx; |
| grpc_core::Resolver::Result result; |
| result.addresses = CreateLbAddressesFromPortList(ports); |
| if (service_config_json != nullptr) { |
| result.service_config = |
| grpc_core::ServiceConfig::Create(service_config_json); |
| } |
| if (lb_channel_response_generator == nullptr) { |
| lb_channel_response_generator = lb_channel_response_generator_.get(); |
| } |
| lb_channel_response_generator->SetResponse(std::move(result)); |
| } |
| |
| void SetNextReresolutionResponse(const std::vector<int>& ports) { |
| grpc_core::ExecCtx exec_ctx; |
| grpc_core::Resolver::Result result; |
| result.addresses = CreateLbAddressesFromPortList(ports); |
| response_generator_->SetReresolutionResponse(std::move(result)); |
| } |
| |
| const std::vector<int> GetBackendPorts(size_t start_index = 0, |
| size_t stop_index = 0) const { |
| if (stop_index == 0) stop_index = backends_.size(); |
| std::vector<int> backend_ports; |
| for (size_t i = start_index; i < stop_index; ++i) { |
| backend_ports.push_back(backends_[i]->port_); |
| } |
| return backend_ports; |
| } |
| |
| void ScheduleResponseForBalancer(size_t i, |
| const LoadBalanceResponse& response, |
| int delay_ms) { |
| balancers_[i]->service_.add_response(response, delay_ms); |
| } |
| |
| Status SendRpc(EchoResponse* response = nullptr, int timeout_ms = 1000, |
| bool wait_for_ready = false) { |
| const bool local_response = (response == nullptr); |
| if (local_response) response = new EchoResponse; |
| EchoRequest request; |
| request.set_message(kRequestMessage_); |
| ClientContext context; |
| context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms)); |
| if (wait_for_ready) context.set_wait_for_ready(true); |
| Status status = stub_->Echo(&context, request, response); |
| if (local_response) delete response; |
| return status; |
| } |
| |
| void CheckRpcSendOk(const size_t times = 1, const int timeout_ms = 1000, |
| bool wait_for_ready = false) { |
| for (size_t i = 0; i < times; ++i) { |
| EchoResponse response; |
| const Status status = SendRpc(&response, timeout_ms, wait_for_ready); |
| EXPECT_TRUE(status.ok()) << "code=" << status.error_code() |
| << " message=" << status.error_message(); |
| EXPECT_EQ(response.message(), kRequestMessage_); |
| } |
| } |
| |
| void CheckRpcSendFailure() { |
| const Status status = SendRpc(); |
| EXPECT_FALSE(status.ok()); |
| } |
| |
| template <typename T> |
| struct ServerThread { |
| template <typename... Args> |
| explicit ServerThread(const grpc::string& type, Args&&... args) |
| : port_(grpc_pick_unused_port_or_die()), |
| type_(type), |
| service_(std::forward<Args>(args)...) {} |
| |
| void Start(const grpc::string& server_host) { |
| gpr_log(GPR_INFO, "starting %s server on port %d", type_.c_str(), port_); |
| GPR_ASSERT(!running_); |
| running_ = true; |
| std::mutex mu; |
| // We need to acquire the lock here in order to prevent the notify_one |
| // by ServerThread::Serve from firing before the wait below is hit. |
| std::unique_lock<std::mutex> lock(mu); |
| std::condition_variable cond; |
| thread_.reset(new std::thread( |
| std::bind(&ServerThread::Serve, this, server_host, &mu, &cond))); |
| cond.wait(lock); |
| gpr_log(GPR_INFO, "%s server startup complete", type_.c_str()); |
| } |
| |
| void Serve(const grpc::string& server_host, std::mutex* mu, |
| std::condition_variable* cond) { |
| // We need to acquire the lock here in order to prevent the notify_one |
| // below from firing before its corresponding wait is executed. |
| std::lock_guard<std::mutex> lock(*mu); |
| std::ostringstream server_address; |
| server_address << server_host << ":" << port_; |
| ServerBuilder builder; |
| std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials( |
| grpc_fake_transport_security_server_credentials_create())); |
| builder.AddListeningPort(server_address.str(), creds); |
| builder.RegisterService(&service_); |
| server_ = builder.BuildAndStart(); |
| cond->notify_one(); |
| } |
| |
| void Shutdown() { |
| if (!running_) return; |
| gpr_log(GPR_INFO, "%s about to shutdown", type_.c_str()); |
| service_.Shutdown(); |
| server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0)); |
| thread_->join(); |
| gpr_log(GPR_INFO, "%s shutdown completed", type_.c_str()); |
| running_ = false; |
| } |
| |
| const int port_; |
| grpc::string type_; |
| T service_; |
| std::unique_ptr<Server> server_; |
| std::unique_ptr<std::thread> thread_; |
| bool running_ = false; |
| }; |
| |
| const grpc::string server_host_; |
| const size_t num_backends_; |
| const size_t num_balancers_; |
| const int client_load_reporting_interval_seconds_; |
| std::shared_ptr<Channel> channel_; |
| std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_; |
| std::vector<std::unique_ptr<ServerThread<BackendServiceImpl>>> backends_; |
| std::vector<std::unique_ptr<ServerThread<BalancerServiceImpl>>> balancers_; |
| grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator> |
| response_generator_; |
| grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator> |
| lb_channel_response_generator_; |
| const grpc::string kRequestMessage_ = "Live long and prosper."; |
| const grpc::string kApplicationTargetName_ = "application_target_name"; |
| const grpc::string kDefaultServiceConfig_ = |
| "{\n" |
| " \"loadBalancingConfig\":[\n" |
| " { \"does_not_exist\":{} },\n" |
| " { \"xds_experimental\":{ \"balancerName\": \"fake:///lb\" } }\n" |
| " ]\n" |
| "}"; |
| }; |
| |
| class SingleBalancerTest : public XdsEnd2endTest { |
| public: |
| SingleBalancerTest() : XdsEnd2endTest(4, 1, 0) {} |
| }; |
| |
| TEST_F(SingleBalancerTest, Vanilla) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const size_t kNumRpcsPerAddress = 100; |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}), |
| 0); |
| // Make sure that trying to connect works without a call. |
| channel_->GetState(true /* try_to_connect */); |
| // We need to wait for all backends to come online. |
| WaitForAllBackends(); |
| // Send kNumRpcsPerAddress RPCs per server. |
| CheckRpcSendOk(kNumRpcsPerAddress * num_backends_); |
| // Each backend should have gotten 100 requests. |
| for (size_t i = 0; i < backends_.size(); ++i) { |
| EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count()); |
| } |
| balancers_[0]->service_.NotifyDoneWithServerlists(); |
| // The balancer got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| |
| // Check LB policy name for the channel. |
| EXPECT_EQ("xds_experimental", channel_->GetLoadBalancingPolicyName()); |
| } |
| |
| TEST_F(SingleBalancerTest, SameBackendListedMultipleTimes) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| // Same backend listed twice. |
| std::vector<int> ports; |
| ports.push_back(backends_[0]->port_); |
| ports.push_back(backends_[0]->port_); |
| const size_t kNumRpcsPerAddress = 10; |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(ports, {}), 0); |
| // We need to wait for the backend to come online. |
| WaitForBackend(0); |
| // Send kNumRpcsPerAddress RPCs per server. |
| CheckRpcSendOk(kNumRpcsPerAddress * ports.size()); |
| // Backend should have gotten 20 requests. |
| EXPECT_EQ(kNumRpcsPerAddress * 2, backends_[0]->service_.request_count()); |
| // And they should have come from a single client port, because of |
| // subchannel sharing. |
| EXPECT_EQ(1UL, backends_[0]->service_.clients().size()); |
| balancers_[0]->service_.NotifyDoneWithServerlists(); |
| } |
| |
| TEST_F(SingleBalancerTest, SecureNaming) { |
| // TODO(juanlishen): Use separate fake creds for the balancer channel. |
| ResetStub(0, kApplicationTargetName_ + ";lb"); |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannel({balancers_[0]->port_}); |
| const size_t kNumRpcsPerAddress = 100; |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}), |
| 0); |
| // Make sure that trying to connect works without a call. |
| channel_->GetState(true /* try_to_connect */); |
| // We need to wait for all backends to come online. |
| WaitForAllBackends(); |
| // Send kNumRpcsPerAddress RPCs per server. |
| CheckRpcSendOk(kNumRpcsPerAddress * num_backends_); |
| |
| // Each backend should have gotten 100 requests. |
| for (size_t i = 0; i < backends_.size(); ++i) { |
| EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count()); |
| } |
| // The balancer got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| } |
| |
| TEST_F(SingleBalancerTest, SecureNamingDeathTest) { |
| ::testing::FLAGS_gtest_death_test_style = "threadsafe"; |
| // Make sure that we blow up (via abort() from the security connector) when |
| // the name from the balancer doesn't match expectations. |
| ASSERT_DEATH( |
| { |
| ResetStub(0, kApplicationTargetName_ + ";lb"); |
| SetNextResolution({}, |
| "{\n" |
| " \"loadBalancingConfig\":[\n" |
| " { \"does_not_exist\":{} },\n" |
| " { \"xds_experimental\":{ \"balancerName\": " |
| "\"fake:///wrong_lb\" } }\n" |
| " ]\n" |
| "}"); |
| SetNextResolutionForLbChannel({balancers_[0]->port_}); |
| channel_->WaitForConnected(grpc_timeout_seconds_to_deadline(1)); |
| }, |
| ""); |
| } |
| |
| TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor(); |
| const int kCallDeadlineMs = kServerlistDelayMs * 2; |
| // First response is an empty serverlist, sent right away. |
| ScheduleResponseForBalancer(0, LoadBalanceResponse(), 0); |
| // Send non-empty serverlist only after kServerlistDelayMs |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}), |
| kServerlistDelayMs); |
| const auto t0 = system_clock::now(); |
| // Client will block: LB will initially send empty serverlist. |
| CheckRpcSendOk(1, kCallDeadlineMs, true /* wait_for_ready */); |
| const auto ellapsed_ms = |
| std::chrono::duration_cast<std::chrono::milliseconds>( |
| system_clock::now() - t0); |
| // but eventually, the LB sends a serverlist update that allows the call to |
| // proceed. The call delay must be larger than the delay in sending the |
| // populated serverlist but under the call's deadline (which is enforced by |
| // the call's deadline). |
| EXPECT_GT(ellapsed_ms.count(), kServerlistDelayMs); |
| balancers_[0]->service_.NotifyDoneWithServerlists(); |
| // The balancer got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent two responses. |
| EXPECT_EQ(2U, balancers_[0]->service_.response_count()); |
| } |
| |
| TEST_F(SingleBalancerTest, AllServersUnreachableFailFast) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const size_t kNumUnreachableServers = 5; |
| std::vector<int> ports; |
| for (size_t i = 0; i < kNumUnreachableServers; ++i) { |
| ports.push_back(grpc_pick_unused_port_or_die()); |
| } |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(ports, {}), 0); |
| const Status status = SendRpc(); |
| // The error shouldn't be DEADLINE_EXCEEDED. |
| EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code()); |
| balancers_[0]->service_.NotifyDoneWithServerlists(); |
| // The balancer got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| } |
| |
| // The fallback tests are deferred because the fallback mode hasn't been |
| // supported yet. |
| |
| // TODO(juanlishen): Add TEST_F(SingleBalancerTest, Fallback) |
| |
| // TODO(juanlishen): Add TEST_F(SingleBalancerTest, FallbackUpdate) |
| |
| // TODO(juanlishen): Add TEST_F(SingleBalancerTest, |
| // FallbackEarlyWhenBalancerChannelFails) |
| |
| TEST_F(SingleBalancerTest, BackendsRestart) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}), |
| 0); |
| WaitForAllBackends(); |
| // Stop backends. RPCs should fail. |
| ShutdownAllBackends(); |
| CheckRpcSendFailure(); |
| // Restart all backends. RPCs should start succeeding again. |
| StartAllBackends(); |
| CheckRpcSendOk(1 /* times */, 2000 /* timeout_ms */, |
| true /* wait_for_ready */); |
| } |
| |
| class UpdatesTest : public XdsEnd2endTest { |
| public: |
| UpdatesTest() : XdsEnd2endTest(4, 3, 0) {} |
| }; |
| |
| TEST_F(UpdatesTest, UpdateBalancersButKeepUsingOriginalBalancer) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const std::vector<int> first_backend{GetBackendPorts()[0]}; |
| const std::vector<int> second_backend{GetBackendPorts()[1]}; |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0); |
| ScheduleResponseForBalancer( |
| 1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0); |
| |
| // Wait until the first backend is ready. |
| WaitForBackend(0); |
| |
| // Send 10 requests. |
| gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH =========="); |
| |
| // All 10 requests should have gone to the first backend. |
| EXPECT_EQ(10U, backends_[0]->service_.request_count()); |
| |
| // Balancer 0 got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| |
| gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 =========="); |
| SetNextResolutionForLbChannel({balancers_[1]->port_}); |
| gpr_log(GPR_INFO, "========= UPDATE 1 DONE =========="); |
| |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| gpr_timespec deadline = gpr_time_add( |
| gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN)); |
| // Send 10 seconds worth of RPCs |
| do { |
| CheckRpcSendOk(); |
| } while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0); |
| // The current LB call is still working, so xds continued using it to the |
| // first balancer, which doesn't assign the second backend. |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| } |
| |
| TEST_F(UpdatesTest, UpdateBalancerName) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const std::vector<int> first_backend{GetBackendPorts()[0]}; |
| const std::vector<int> second_backend{GetBackendPorts()[1]}; |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0); |
| ScheduleResponseForBalancer( |
| 1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0); |
| |
| // Wait until the first backend is ready. |
| WaitForBackend(0); |
| |
| // Send 10 requests. |
| gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH =========="); |
| |
| // All 10 requests should have gone to the first backend. |
| EXPECT_EQ(10U, backends_[0]->service_.request_count()); |
| |
| // Balancer 0 got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| |
| std::vector<int> ports; |
| ports.emplace_back(balancers_[1]->port_); |
| auto new_lb_channel_response_generator = |
| grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>(); |
| SetNextResolutionForLbChannel(ports, nullptr, |
| new_lb_channel_response_generator.get()); |
| gpr_log(GPR_INFO, "========= ABOUT TO UPDATE BALANCER NAME =========="); |
| SetNextResolution({}, |
| "{\n" |
| " \"loadBalancingConfig\":[\n" |
| " { \"does_not_exist\":{} },\n" |
| " { \"xds_experimental\":{ \"balancerName\": " |
| "\"fake:///updated_lb\" } }\n" |
| " ]\n" |
| "}", |
| new_lb_channel_response_generator.get()); |
| gpr_log(GPR_INFO, "========= UPDATED BALANCER NAME =========="); |
| |
| // Wait until update has been processed, as signaled by the second backend |
| // receiving a request. |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| WaitForBackend(1); |
| |
| backends_[1]->service_.ResetCounters(); |
| gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH =========="); |
| // All 10 requests should have gone to the second backend. |
| EXPECT_EQ(10U, backends_[1]->service_.request_count()); |
| |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(1U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(1U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| } |
| |
| // Send an update with the same set of LBs as the one in SetUp() in order to |
| // verify that the LB channel inside xds keeps the initial connection (which |
| // by definition is also present in the update). |
| TEST_F(UpdatesTest, UpdateBalancersRepeated) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannelAllBalancers(); |
| const std::vector<int> first_backend{GetBackendPorts()[0]}; |
| const std::vector<int> second_backend{GetBackendPorts()[0]}; |
| |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0); |
| ScheduleResponseForBalancer( |
| 1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0); |
| |
| // Wait until the first backend is ready. |
| WaitForBackend(0); |
| |
| // Send 10 requests. |
| gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH =========="); |
| |
| // All 10 requests should have gone to the first backend. |
| EXPECT_EQ(10U, backends_[0]->service_.request_count()); |
| |
| // Balancer 0 got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| |
| std::vector<int> ports; |
| ports.emplace_back(balancers_[0]->port_); |
| ports.emplace_back(balancers_[1]->port_); |
| ports.emplace_back(balancers_[2]->port_); |
| gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 =========="); |
| SetNextResolutionForLbChannel(ports); |
| gpr_log(GPR_INFO, "========= UPDATE 1 DONE =========="); |
| |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| gpr_timespec deadline = gpr_time_add( |
| gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN)); |
| // Send 10 seconds worth of RPCs |
| do { |
| CheckRpcSendOk(); |
| } while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0); |
| // xds continued using the original LB call to the first balancer, which |
| // doesn't assign the second backend. |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| |
| ports.clear(); |
| ports.emplace_back(balancers_[0]->port_); |
| ports.emplace_back(balancers_[1]->port_); |
| gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 2 =========="); |
| SetNextResolutionForLbChannel(ports); |
| gpr_log(GPR_INFO, "========= UPDATE 2 DONE =========="); |
| |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_millis(10000, GPR_TIMESPAN)); |
| // Send 10 seconds worth of RPCs |
| do { |
| CheckRpcSendOk(); |
| } while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0); |
| // xds continued using the original LB call to the first balancer, which |
| // doesn't assign the second backend. |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| } |
| |
| TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) { |
| SetNextResolution({}, kDefaultServiceConfig_.c_str()); |
| SetNextResolutionForLbChannel({balancers_[0]->port_}); |
| const std::vector<int> first_backend{GetBackendPorts()[0]}; |
| const std::vector<int> second_backend{GetBackendPorts()[1]}; |
| |
| ScheduleResponseForBalancer( |
| 0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0); |
| ScheduleResponseForBalancer( |
| 1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0); |
| |
| // Start servers and send 10 RPCs per server. |
| gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH =========="); |
| // All 10 requests should have gone to the first backend. |
| EXPECT_EQ(10U, backends_[0]->service_.request_count()); |
| |
| // Kill balancer 0 |
| gpr_log(GPR_INFO, "********** ABOUT TO KILL BALANCER 0 *************"); |
| balancers_[0]->Shutdown(); |
| gpr_log(GPR_INFO, "********** KILLED BALANCER 0 *************"); |
| |
| // This is serviced by the existing child policy. |
| gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH =========="); |
| // All 10 requests should again have gone to the first backend. |
| EXPECT_EQ(20U, backends_[0]->service_.request_count()); |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| |
| // Balancer 0 got a single request. |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| // and sent a single response. |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[1]->service_.response_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| |
| gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 =========="); |
| SetNextResolutionForLbChannel({balancers_[1]->port_}); |
| gpr_log(GPR_INFO, "========= UPDATE 1 DONE =========="); |
| |
| // Wait until update has been processed, as signaled by the second backend |
| // receiving a request. In the meantime, the client continues to be serviced |
| // (by the first backend) without interruption. |
| EXPECT_EQ(0U, backends_[1]->service_.request_count()); |
| WaitForBackend(1); |
| |
| // This is serviced by the updated RR policy |
| backends_[1]->service_.ResetCounters(); |
| gpr_log(GPR_INFO, "========= BEFORE THIRD BATCH =========="); |
| CheckRpcSendOk(10); |
| gpr_log(GPR_INFO, "========= DONE WITH THIRD BATCH =========="); |
| // All 10 requests should have gone to the second backend. |
| EXPECT_EQ(10U, backends_[1]->service_.request_count()); |
| |
| EXPECT_EQ(1U, balancers_[0]->service_.request_count()); |
| EXPECT_EQ(1U, balancers_[0]->service_.response_count()); |
| // The second balancer, published as part of the first update, may end up |
| // getting two requests (that is, 1 <= #req <= 2) if the LB call retry timer |
| // firing races with the arrival of the update containing the second |
| // balancer. |
| EXPECT_GE(balancers_[1]->service_.request_count(), 1U); |
| EXPECT_GE(balancers_[1]->service_.response_count(), 1U); |
| EXPECT_LE(balancers_[1]->service_.request_count(), 2U); |
| EXPECT_LE(balancers_[1]->service_.response_count(), 2U); |
| EXPECT_EQ(0U, balancers_[2]->service_.request_count()); |
| EXPECT_EQ(0U, balancers_[2]->service_.response_count()); |
| } |
| |
| // The re-resolution tests are deferred because they rely on the fallback mode, |
| // which hasn't been supported. |
| |
| // TODO(juanlishen): Add TEST_F(UpdatesTest, ReresolveDeadBackend). |
| |
| // TODO(juanlishen): Add TEST_F(UpdatesWithClientLoadReportingTest, |
| // ReresolveDeadBalancer) |
| |
| // The drop tests are deferred because the drop handling hasn't been added yet. |
| |
| // TODO(roth): Add TEST_F(SingleBalancerTest, Drop) |
| |
| // TODO(roth): Add TEST_F(SingleBalancerTest, DropAllFirst) |
| |
| // TODO(roth): Add TEST_F(SingleBalancerTest, DropAll) |
| |
| class SingleBalancerWithClientLoadReportingTest : public XdsEnd2endTest { |
| public: |
| SingleBalancerWithClientLoadReportingTest() : XdsEnd2endTest(4, 1, 3) {} |
| }; |
| |
| // The client load reporting tests are deferred because the client load |
| // reporting hasn't been supported yet. |
| |
| // TODO(vpowar): Add TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) |
| |
| // TODO(roth): Add TEST_F(SingleBalancerWithClientLoadReportingTest, |
| // BalancerRestart) |
| |
| // TODO(roth): Add TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) |
| |
| } // namespace |
| } // namespace testing |
| } // namespace grpc |
| |
| int main(int argc, char** argv) { |
| grpc_init(); |
| grpc::testing::TestEnvironment env(argc, argv); |
| ::testing::InitGoogleTest(&argc, argv); |
| const auto result = RUN_ALL_TESTS(); |
| grpc_shutdown(); |
| return result; |
| } |