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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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2793 lines
113 KiB
2793 lines
113 KiB
// Copyright 2016 gRPC authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include <algorithm> |
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#include <deque> |
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#include <memory> |
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#include <mutex> |
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#include <random> |
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#include <set> |
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#include <string> |
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#include <thread> |
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#include <gmock/gmock.h> |
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#include <gtest/gtest.h> |
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#include "absl/memory/memory.h" |
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#include "absl/strings/str_cat.h" |
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#include "absl/strings/str_format.h" |
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#include "absl/strings/str_join.h" |
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#include "absl/strings/string_view.h" |
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#include <grpc/event_engine/endpoint_config.h> |
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#include <grpc/grpc.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/atm.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/time.h> |
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#include <grpcpp/channel.h> |
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#include <grpcpp/client_context.h> |
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#include <grpcpp/create_channel.h> |
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#include <grpcpp/ext/call_metric_recorder.h> |
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#include <grpcpp/ext/orca_service.h> |
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#include <grpcpp/health_check_service_interface.h> |
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#include <grpcpp/impl/codegen/sync.h> |
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#include <grpcpp/server.h> |
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#include <grpcpp/server_builder.h> |
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#include "src/core/ext/filters/client_channel/backup_poller.h" |
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#include "src/core/ext/filters/client_channel/config_selector.h" |
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#include "src/core/ext/filters/client_channel/global_subchannel_pool.h" |
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#include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h" |
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#include "src/core/lib/address_utils/parse_address.h" |
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#include "src/core/lib/address_utils/sockaddr_utils.h" |
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#include "src/core/lib/backoff/backoff.h" |
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#include "src/core/lib/channel/channel_args.h" |
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#include "src/core/lib/gpr/env.h" |
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#include "src/core/lib/gprpp/debug_location.h" |
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#include "src/core/lib/gprpp/ref_counted_ptr.h" |
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#include "src/core/lib/gprpp/time.h" |
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#include "src/core/lib/iomgr/tcp_client.h" |
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#include "src/core/lib/resolver/server_address.h" |
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#include "src/core/lib/security/credentials/fake/fake_credentials.h" |
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#include "src/core/lib/service_config/service_config.h" |
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#include "src/core/lib/service_config/service_config_impl.h" |
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#include "src/core/lib/surface/server.h" |
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#include "src/core/lib/transport/connectivity_state.h" |
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#include "src/cpp/client/secure_credentials.h" |
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#include "src/cpp/server/secure_server_credentials.h" |
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#include "src/proto/grpc/testing/echo.grpc.pb.h" |
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#include "src/proto/grpc/testing/xds/v3/orca_load_report.pb.h" |
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#include "test/core/util/port.h" |
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#include "test/core/util/resolve_localhost_ip46.h" |
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#include "test/core/util/test_config.h" |
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#include "test/core/util/test_lb_policies.h" |
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#include "test/cpp/end2end/connection_attempt_injector.h" |
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#include "test/cpp/end2end/test_service_impl.h" |
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using grpc::testing::EchoRequest; |
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using grpc::testing::EchoResponse; |
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namespace grpc { |
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namespace testing { |
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namespace { |
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constexpr char kRequestMessage[] = "Live long and prosper."; |
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|
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// Subclass of TestServiceImpl that increments a request counter for |
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// every call to the Echo RPC. |
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class MyTestServiceImpl : public TestServiceImpl { |
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public: |
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Status Echo(ServerContext* context, const EchoRequest* request, |
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EchoResponse* response) override { |
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{ |
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grpc_core::MutexLock lock(&mu_); |
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++request_count_; |
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} |
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AddClient(context->peer()); |
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if (request->has_param() && request->param().has_backend_metrics()) { |
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load_report_ = request->param().backend_metrics(); |
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auto* recorder = context->ExperimentalGetCallMetricRecorder(); |
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EXPECT_NE(recorder, nullptr); |
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recorder->RecordCpuUtilizationMetric(load_report_.cpu_utilization()) |
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.RecordMemoryUtilizationMetric(load_report_.mem_utilization()); |
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for (const auto& p : load_report_.request_cost()) { |
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recorder->RecordRequestCostMetric(p.first, p.second); |
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} |
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for (const auto& p : load_report_.utilization()) { |
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recorder->RecordUtilizationMetric(p.first, p.second); |
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} |
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} |
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return TestServiceImpl::Echo(context, request, response); |
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} |
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int request_count() { |
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grpc_core::MutexLock lock(&mu_); |
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return request_count_; |
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} |
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void ResetCounters() { |
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grpc_core::MutexLock lock(&mu_); |
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request_count_ = 0; |
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} |
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std::set<std::string> clients() { |
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grpc_core::MutexLock lock(&clients_mu_); |
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return clients_; |
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} |
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private: |
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void AddClient(const std::string& client) { |
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grpc_core::MutexLock lock(&clients_mu_); |
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clients_.insert(client); |
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} |
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grpc_core::Mutex mu_; |
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int request_count_ = 0; |
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grpc_core::Mutex clients_mu_; |
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std::set<std::string> clients_; |
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// For strings storage. |
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xds::data::orca::v3::OrcaLoadReport load_report_; |
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}; |
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class FakeResolverResponseGeneratorWrapper { |
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public: |
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explicit FakeResolverResponseGeneratorWrapper(bool ipv6_only) |
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: ipv6_only_(ipv6_only), |
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response_generator_(grpc_core::MakeRefCounted< |
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grpc_core::FakeResolverResponseGenerator>()) {} |
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FakeResolverResponseGeneratorWrapper( |
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FakeResolverResponseGeneratorWrapper&& other) noexcept { |
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ipv6_only_ = other.ipv6_only_; |
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response_generator_ = std::move(other.response_generator_); |
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} |
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void SetNextResolution( |
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const std::vector<int>& ports, const char* service_config_json = nullptr, |
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const char* attribute_key = nullptr, |
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std::unique_ptr<grpc_core::ServerAddress::AttributeInterface> attribute = |
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nullptr, |
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const grpc_core::ChannelArgs& per_address_args = |
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grpc_core::ChannelArgs()) { |
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grpc_core::ExecCtx exec_ctx; |
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response_generator_->SetResponse( |
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BuildFakeResults(ipv6_only_, ports, service_config_json, attribute_key, |
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std::move(attribute), per_address_args)); |
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} |
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void SetNextResolutionUponError(const std::vector<int>& ports) { |
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grpc_core::ExecCtx exec_ctx; |
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response_generator_->SetReresolutionResponse( |
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BuildFakeResults(ipv6_only_, ports)); |
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} |
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void SetFailureOnReresolution() { |
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grpc_core::ExecCtx exec_ctx; |
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response_generator_->SetFailureOnReresolution(); |
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} |
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void SetResponse(grpc_core::Resolver::Result result) { |
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grpc_core::ExecCtx exec_ctx; |
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response_generator_->SetResponse(std::move(result)); |
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} |
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grpc_core::FakeResolverResponseGenerator* Get() const { |
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return response_generator_.get(); |
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} |
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private: |
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static grpc_core::Resolver::Result BuildFakeResults( |
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bool ipv6_only, const std::vector<int>& ports, |
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const char* service_config_json = nullptr, |
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const char* attribute_key = nullptr, |
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std::unique_ptr<grpc_core::ServerAddress::AttributeInterface> attribute = |
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nullptr, |
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const grpc_core::ChannelArgs& per_address_args = |
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grpc_core::ChannelArgs()) { |
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grpc_core::Resolver::Result result; |
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result.addresses = grpc_core::ServerAddressList(); |
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for (const int& port : ports) { |
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absl::StatusOr<grpc_core::URI> lb_uri = grpc_core::URI::Parse( |
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absl::StrCat(ipv6_only ? "ipv6:[::1]:" : "ipv4:127.0.0.1:", port)); |
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GPR_ASSERT(lb_uri.ok()); |
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grpc_resolved_address address; |
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GPR_ASSERT(grpc_parse_uri(*lb_uri, &address)); |
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std::map<const char*, |
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std::unique_ptr<grpc_core::ServerAddress::AttributeInterface>> |
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attributes; |
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if (attribute != nullptr) { |
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attributes[attribute_key] = attribute->Copy(); |
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} |
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result.addresses->emplace_back(address.addr, address.len, |
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per_address_args, std::move(attributes)); |
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} |
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if (result.addresses->empty()) { |
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result.resolution_note = "fake resolver empty address list"; |
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} |
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if (service_config_json != nullptr) { |
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result.service_config = grpc_core::ServiceConfigImpl::Create( |
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grpc_core::ChannelArgs(), service_config_json); |
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GPR_ASSERT(result.service_config.ok()); |
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} |
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return result; |
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} |
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bool ipv6_only_ = false; |
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grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator> |
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response_generator_; |
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}; |
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class ClientLbEnd2endTest : public ::testing::Test { |
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protected: |
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ClientLbEnd2endTest() |
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: server_host_("localhost"), |
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creds_(new SecureChannelCredentials( |
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grpc_fake_transport_security_credentials_create())) {} |
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static void SetUpTestCase() { |
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// Make the backup poller poll very frequently in order to pick up |
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// updates from all the subchannels's FDs. |
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GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1); |
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#if TARGET_OS_IPHONE |
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// Workaround Apple CFStream bug |
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gpr_setenv("grpc_cfstream", "0"); |
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#endif |
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} |
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void SetUp() override { |
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grpc_init(); |
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bool localhost_resolves_to_ipv4 = false; |
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bool localhost_resolves_to_ipv6 = false; |
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grpc_core::LocalhostResolves(&localhost_resolves_to_ipv4, |
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&localhost_resolves_to_ipv6); |
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ipv6_only_ = !localhost_resolves_to_ipv4 && localhost_resolves_to_ipv6; |
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} |
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void TearDown() override { |
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for (size_t i = 0; i < servers_.size(); ++i) { |
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servers_[i]->Shutdown(); |
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} |
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servers_.clear(); |
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creds_.reset(); |
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grpc_shutdown(); |
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} |
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void CreateServers(size_t num_servers, |
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std::vector<int> ports = std::vector<int>()) { |
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servers_.clear(); |
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for (size_t i = 0; i < num_servers; ++i) { |
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int port = 0; |
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if (ports.size() == num_servers) port = ports[i]; |
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servers_.emplace_back(new ServerData(port)); |
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} |
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} |
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void StartServer(size_t index) { servers_[index]->Start(server_host_); } |
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void StartServers(size_t num_servers, |
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std::vector<int> ports = std::vector<int>()) { |
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CreateServers(num_servers, std::move(ports)); |
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for (size_t i = 0; i < num_servers; ++i) { |
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StartServer(i); |
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} |
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} |
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std::vector<int> GetServersPorts(size_t start_index = 0, |
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size_t stop_index = 0) { |
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if (stop_index == 0) stop_index = servers_.size(); |
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std::vector<int> ports; |
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for (size_t i = start_index; i < stop_index; ++i) { |
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ports.push_back(servers_[i]->port_); |
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} |
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return ports; |
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} |
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FakeResolverResponseGeneratorWrapper BuildResolverResponseGenerator() { |
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return FakeResolverResponseGeneratorWrapper(ipv6_only_); |
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} |
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std::unique_ptr<grpc::testing::EchoTestService::Stub> BuildStub( |
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const std::shared_ptr<Channel>& channel) { |
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return grpc::testing::EchoTestService::NewStub(channel); |
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} |
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std::shared_ptr<Channel> BuildChannel( |
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const std::string& lb_policy_name, |
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const FakeResolverResponseGeneratorWrapper& response_generator, |
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ChannelArguments args = ChannelArguments()) { |
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if (!lb_policy_name.empty()) { |
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args.SetLoadBalancingPolicyName(lb_policy_name); |
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} // else, default to pick first |
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args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR, |
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response_generator.Get()); |
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return grpc::CreateCustomChannel("fake:default.example.com", creds_, args); |
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} |
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Status SendRpc( |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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EchoResponse* response = nullptr, int timeout_ms = 1000, |
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bool wait_for_ready = false, EchoRequest* request = nullptr) { |
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EchoResponse local_response; |
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if (response == nullptr) response = &local_response; |
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EchoRequest local_request; |
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if (request == nullptr) request = &local_request; |
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request->set_message(kRequestMessage); |
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request->mutable_param()->set_echo_metadata(true); |
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ClientContext context; |
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context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms)); |
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if (wait_for_ready) context.set_wait_for_ready(true); |
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context.AddMetadata("foo", "1"); |
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context.AddMetadata("bar", "2"); |
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context.AddMetadata("baz", "3"); |
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return stub->Echo(&context, *request, response); |
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} |
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void CheckRpcSendOk( |
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const grpc_core::DebugLocation& location, |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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bool wait_for_ready = false, |
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xds::data::orca::v3::OrcaLoadReport* load_report = nullptr, |
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int timeout_ms = 2000) { |
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EchoResponse response; |
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EchoRequest request; |
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EchoRequest* request_ptr = nullptr; |
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if (load_report != nullptr) { |
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request_ptr = &request; |
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auto params = request.mutable_param(); |
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auto backend_metrics = params->mutable_backend_metrics(); |
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*backend_metrics = *load_report; |
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} |
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Status status = |
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SendRpc(stub, &response, timeout_ms, wait_for_ready, request_ptr); |
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ASSERT_TRUE(status.ok()) |
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<< "From " << location.file() << ":" << location.line() |
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<< "\nError: " << status.error_message() << " " |
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<< status.error_details(); |
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ASSERT_EQ(response.message(), kRequestMessage) |
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<< "From " << location.file() << ":" << location.line(); |
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} |
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void CheckRpcSendFailure( |
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const grpc_core::DebugLocation& location, |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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StatusCode expected_status, absl::string_view expected_message_regex) { |
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Status status = SendRpc(stub); |
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EXPECT_FALSE(status.ok()); |
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EXPECT_EQ(expected_status, status.error_code()) |
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<< location.file() << ":" << location.line(); |
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EXPECT_THAT(status.error_message(), |
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::testing::MatchesRegex(expected_message_regex)) |
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<< location.file() << ":" << location.line(); |
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} |
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void SendRpcsUntil( |
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const grpc_core::DebugLocation& debug_location, |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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std::function<bool(const Status&)> continue_predicate, |
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int timeout_ms = 15000) { |
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absl::Time deadline = absl::InfiniteFuture(); |
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if (timeout_ms != 0) { |
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deadline = absl::Now() + |
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(absl::Milliseconds(timeout_ms) * grpc_test_slowdown_factor()); |
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} |
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while (true) { |
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Status status = SendRpc(stub); |
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if (!continue_predicate(status)) return; |
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EXPECT_LE(absl::Now(), deadline) |
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<< debug_location.file() << ":" << debug_location.line(); |
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if (absl::Now() >= deadline) break; |
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} |
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} |
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struct ServerData { |
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const int port_; |
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std::unique_ptr<Server> server_; |
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MyTestServiceImpl service_; |
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experimental::OrcaService orca_service_; |
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std::unique_ptr<std::thread> thread_; |
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grpc_core::Mutex mu_; |
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grpc_core::CondVar cond_; |
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bool server_ready_ ABSL_GUARDED_BY(mu_) = false; |
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bool started_ ABSL_GUARDED_BY(mu_) = false; |
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explicit ServerData(int port = 0) |
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: port_(port > 0 ? port : grpc_pick_unused_port_or_die()), |
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orca_service_(experimental::OrcaService::Options()) {} |
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void Start(const std::string& server_host) { |
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gpr_log(GPR_INFO, "starting server on port %d", port_); |
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grpc_core::MutexLock lock(&mu_); |
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started_ = true; |
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thread_ = absl::make_unique<std::thread>( |
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std::bind(&ServerData::Serve, this, server_host)); |
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while (!server_ready_) { |
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cond_.Wait(&mu_); |
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} |
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server_ready_ = false; |
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gpr_log(GPR_INFO, "server startup complete"); |
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} |
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void Serve(const std::string& server_host) { |
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std::ostringstream server_address; |
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server_address << server_host << ":" << port_; |
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ServerBuilder builder; |
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experimental::EnableCallMetricRecording(&builder); |
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std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials( |
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grpc_fake_transport_security_server_credentials_create())); |
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builder.AddListeningPort(server_address.str(), std::move(creds)); |
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builder.RegisterService(&service_); |
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builder.RegisterService(&orca_service_); |
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server_ = builder.BuildAndStart(); |
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grpc_core::MutexLock lock(&mu_); |
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server_ready_ = true; |
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cond_.Signal(); |
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} |
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void Shutdown() { |
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grpc_core::MutexLock lock(&mu_); |
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if (!started_) return; |
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server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0)); |
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thread_->join(); |
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started_ = false; |
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} |
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void StopListeningAndSendGoaways() { |
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grpc_core::ExecCtx exec_ctx; |
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auto* server = grpc_core::Server::FromC(server_->c_server()); |
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server->StopListening(); |
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server->SendGoaways(); |
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} |
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|
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void SetServingStatus(const std::string& service, bool serving) { |
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server_->GetHealthCheckService()->SetServingStatus(service, serving); |
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} |
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}; |
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|
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void ResetCounters() { |
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for (const auto& server : servers_) server->service_.ResetCounters(); |
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} |
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bool SeenAllServers(size_t start_index = 0, size_t stop_index = 0) { |
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if (stop_index == 0) stop_index = servers_.size(); |
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for (size_t i = start_index; i < stop_index; ++i) { |
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if (servers_[i]->service_.request_count() == 0) return false; |
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} |
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return true; |
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} |
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|
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// If status_check is null, all RPCs must succeed. |
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// If status_check is non-null, it will be called for all non-OK RPCs. |
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void WaitForServers( |
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const grpc_core::DebugLocation& location, |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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size_t start_index = 0, size_t stop_index = 0, |
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std::function<void(const Status&)> status_check = nullptr, |
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absl::Duration timeout = absl::Seconds(30)) { |
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if (stop_index == 0) stop_index = servers_.size(); |
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auto deadline = absl::Now() + (timeout * grpc_test_slowdown_factor()); |
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gpr_log(GPR_INFO, |
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"========= WAITING FOR BACKENDS [%" PRIuPTR ", %" PRIuPTR |
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") ==========", |
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start_index, stop_index); |
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while (!SeenAllServers(start_index, stop_index)) { |
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Status status = SendRpc(stub); |
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if (status_check != nullptr) { |
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if (!status.ok()) status_check(status); |
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} else { |
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EXPECT_TRUE(status.ok()) |
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<< " code=" << status.error_code() << " message=\"" |
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<< status.error_message() << "\" at " << location.file() << ":" |
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<< location.line(); |
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} |
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EXPECT_LE(absl::Now(), deadline) |
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<< " at " << location.file() << ":" << location.line(); |
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if (absl::Now() >= deadline) break; |
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} |
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ResetCounters(); |
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} |
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|
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void WaitForServer( |
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const grpc_core::DebugLocation& location, |
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const std::unique_ptr<grpc::testing::EchoTestService::Stub>& stub, |
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size_t server_index, |
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std::function<void(const Status&)> status_check = nullptr) { |
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WaitForServers(location, stub, server_index, server_index + 1, |
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status_check); |
|
} |
|
|
|
bool WaitForChannelState( |
|
Channel* channel, |
|
const std::function<bool(grpc_connectivity_state)>& predicate, |
|
bool try_to_connect = false, int timeout_seconds = 5) { |
|
const gpr_timespec deadline = |
|
grpc_timeout_seconds_to_deadline(timeout_seconds); |
|
while (true) { |
|
grpc_connectivity_state state = channel->GetState(try_to_connect); |
|
if (predicate(state)) break; |
|
if (!channel->WaitForStateChange(state, deadline)) return false; |
|
} |
|
return true; |
|
} |
|
|
|
bool WaitForChannelNotReady(Channel* channel, int timeout_seconds = 5) { |
|
auto predicate = [](grpc_connectivity_state state) { |
|
return state != GRPC_CHANNEL_READY; |
|
}; |
|
return WaitForChannelState(channel, predicate, false, timeout_seconds); |
|
} |
|
|
|
bool WaitForChannelReady(Channel* channel, int timeout_seconds = 5) { |
|
auto predicate = [](grpc_connectivity_state state) { |
|
return state == GRPC_CHANNEL_READY; |
|
}; |
|
return WaitForChannelState(channel, predicate, true, timeout_seconds); |
|
} |
|
|
|
// Updates \a connection_order by appending to it the index of the newly |
|
// connected server. Must be called after every single RPC. |
|
void UpdateConnectionOrder( |
|
const std::vector<std::unique_ptr<ServerData>>& servers, |
|
std::vector<int>* connection_order) { |
|
for (size_t i = 0; i < servers.size(); ++i) { |
|
if (servers[i]->service_.request_count() == 1) { |
|
// Was the server index known? If not, update connection_order. |
|
const auto it = |
|
std::find(connection_order->begin(), connection_order->end(), i); |
|
if (it == connection_order->end()) { |
|
connection_order->push_back(i); |
|
return; |
|
} |
|
} |
|
} |
|
} |
|
|
|
const std::string server_host_; |
|
std::vector<std::unique_ptr<ServerData>> servers_; |
|
std::shared_ptr<ChannelCredentials> creds_; |
|
bool ipv6_only_ = false; |
|
}; |
|
|
|
TEST_F(ClientLbEnd2endTest, ChannelStateConnectingWhenResolving) { |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Initial state should be IDLE. |
|
EXPECT_EQ(channel->GetState(false /* try_to_connect */), GRPC_CHANNEL_IDLE); |
|
// Tell the channel to try to connect. |
|
// Note that this call also returns IDLE, since the state change has |
|
// not yet occurred; it just gets triggered by this call. |
|
EXPECT_EQ(channel->GetState(true /* try_to_connect */), GRPC_CHANNEL_IDLE); |
|
// Now that the channel is trying to connect, we should be in state |
|
// CONNECTING. |
|
EXPECT_EQ(channel->GetState(false /* try_to_connect */), |
|
GRPC_CHANNEL_CONNECTING); |
|
// Return a resolver result, which allows the connection attempt to proceed. |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// We should eventually transition into state READY. |
|
EXPECT_TRUE(WaitForChannelReady(channel.get())); |
|
} |
|
|
|
TEST_F(ClientLbEnd2endTest, ChannelIdleness) { |
|
// Start server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
// Set max idle time and build the channel. |
|
ChannelArguments args; |
|
args.SetInt(GRPC_ARG_CLIENT_IDLE_TIMEOUT_MS, |
|
1000 * grpc_test_slowdown_factor()); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
// The initial channel state should be IDLE. |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_IDLE); |
|
// After sending RPC, channel state should be READY. |
|
gpr_log(GPR_INFO, "*** SENDING RPC, CHANNEL SHOULD CONNECT ***"); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
// After a period time not using the channel, the channel state should switch |
|
// to IDLE. |
|
gpr_log(GPR_INFO, "*** WAITING FOR CHANNEL TO GO IDLE ***"); |
|
gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(1200)); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_IDLE); |
|
// Sending a new RPC should awake the IDLE channel. |
|
gpr_log(GPR_INFO, "*** SENDING ANOTHER RPC, CHANNEL SHOULD RECONNECT ***"); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
} |
|
|
|
TEST_F(ClientLbEnd2endTest, AuthorityOverrideOnChannel) { |
|
StartServers(1); |
|
// Set authority via channel arg. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
ChannelArguments args; |
|
args.SetString(GRPC_ARG_DEFAULT_AUTHORITY, "foo.example.com"); |
|
auto channel = BuildChannel("", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Send an RPC. |
|
EchoRequest request; |
|
request.mutable_param()->set_echo_host_from_authority_header(true); |
|
EchoResponse response; |
|
Status status = SendRpc(stub, &response, /*timeout_ms=*/1000, |
|
/*wait_for_ready=*/false, &request); |
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code() |
|
<< " message=" << status.error_message(); |
|
// Check that the right authority was seen by the server. |
|
EXPECT_EQ("foo.example.com", response.param().host()); |
|
} |
|
|
|
TEST_F(ClientLbEnd2endTest, AuthorityOverrideFromResolver) { |
|
StartServers(1); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Inject resolver result that sets the per-address authority to a |
|
// different value. |
|
response_generator.SetNextResolution( |
|
GetServersPorts(), /*service_config_json=*/nullptr, |
|
/*attribute_key=*/nullptr, /*attribute=*/nullptr, |
|
grpc_core::ChannelArgs().Set(GRPC_ARG_DEFAULT_AUTHORITY, |
|
"foo.example.com")); |
|
// Send an RPC. |
|
EchoRequest request; |
|
request.mutable_param()->set_echo_host_from_authority_header(true); |
|
EchoResponse response; |
|
Status status = SendRpc(stub, &response, /*timeout_ms=*/1000, |
|
/*wait_for_ready=*/false, &request); |
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code() |
|
<< " message=" << status.error_message(); |
|
// Check that the right authority was seen by the server. |
|
EXPECT_EQ("foo.example.com", response.param().host()); |
|
} |
|
|
|
TEST_F(ClientLbEnd2endTest, AuthorityOverridePrecedence) { |
|
StartServers(1); |
|
// Set authority via channel arg. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
ChannelArguments args; |
|
args.SetString(GRPC_ARG_DEFAULT_AUTHORITY, "foo.example.com"); |
|
auto channel = BuildChannel("", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
// Inject resolver result that sets the per-address authority to a |
|
// different value. |
|
response_generator.SetNextResolution( |
|
GetServersPorts(), /*service_config_json=*/nullptr, |
|
/*attribute_key=*/nullptr, /*attribute=*/nullptr, |
|
grpc_core::ChannelArgs().Set(GRPC_ARG_DEFAULT_AUTHORITY, |
|
"bar.example.com")); |
|
// Send an RPC. |
|
EchoRequest request; |
|
request.mutable_param()->set_echo_host_from_authority_header(true); |
|
EchoResponse response; |
|
Status status = SendRpc(stub, &response, /*timeout_ms=*/1000, |
|
/*wait_for_ready=*/false, &request); |
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code() |
|
<< " message=" << status.error_message(); |
|
// Check that the right authority was seen by the server. |
|
EXPECT_EQ("foo.example.com", response.param().host()); |
|
} |
|
|
|
// |
|
// pick_first tests |
|
// |
|
|
|
using PickFirstTest = ClientLbEnd2endTest; |
|
|
|
TEST_F(PickFirstTest, Basic) { |
|
// Start servers and send one RPC per server. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel( |
|
"", response_generator); // test that pick first is the default. |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// All requests should have gone to a single server. |
|
bool found = false; |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
const int request_count = servers_[i]->service_.request_count(); |
|
if (request_count == kNumServers) { |
|
found = true; |
|
} else { |
|
EXPECT_EQ(0, request_count); |
|
} |
|
} |
|
EXPECT_TRUE(found); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, ProcessPending) { |
|
StartServers(1); // Single server |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel( |
|
"", response_generator); // test that pick first is the default. |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({servers_[0]->port_}); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
// Create a new channel and its corresponding PF LB policy, which will pick |
|
// the subchannels in READY state from the previous RPC against the same |
|
// target (even if it happened over a different channel, because subchannels |
|
// are globally reused). Progress should happen without any transition from |
|
// this READY state. |
|
auto second_response_generator = BuildResolverResponseGenerator(); |
|
auto second_channel = BuildChannel("", second_response_generator); |
|
auto second_stub = BuildStub(second_channel); |
|
second_response_generator.SetNextResolution({servers_[0]->port_}); |
|
CheckRpcSendOk(DEBUG_LOCATION, second_stub); |
|
} |
|
|
|
TEST_F(PickFirstTest, SelectsReadyAtStartup) { |
|
ChannelArguments args; |
|
constexpr int kInitialBackOffMs = 5000; |
|
args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, |
|
kInitialBackOffMs * grpc_test_slowdown_factor()); |
|
// Create 2 servers, but start only the second one. |
|
std::vector<int> ports = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die()}; |
|
CreateServers(2, ports); |
|
StartServer(1); |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("pick_first", response_generator1, args); |
|
auto stub1 = BuildStub(channel1); |
|
response_generator1.SetNextResolution(ports); |
|
// Wait for second server to be ready. |
|
WaitForServer(DEBUG_LOCATION, stub1, 1); |
|
// Create a second channel with the same addresses. Its PF instance |
|
// should immediately pick the second subchannel, since it's already |
|
// in READY state. |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("pick_first", response_generator2, args); |
|
response_generator2.SetNextResolution(ports); |
|
// Check that the channel reports READY without waiting for the |
|
// initial backoff. |
|
EXPECT_TRUE(WaitForChannelReady(channel2.get(), 1 /* timeout_seconds */)); |
|
} |
|
|
|
TEST_F(PickFirstTest, BackOffInitialReconnect) { |
|
ChannelArguments args; |
|
constexpr int kInitialBackOffMs = 100; |
|
args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, |
|
kInitialBackOffMs * grpc_test_slowdown_factor()); |
|
const std::vector<int> ports = {grpc_pick_unused_port_or_die()}; |
|
const gpr_timespec t0 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
// The channel won't become connected (there's no server). |
|
ASSERT_FALSE(channel->WaitForConnected( |
|
grpc_timeout_milliseconds_to_deadline(kInitialBackOffMs * 2))); |
|
// Bring up a server on the chosen port. |
|
StartServers(1, ports); |
|
// Now it will. |
|
ASSERT_TRUE(channel->WaitForConnected( |
|
grpc_timeout_milliseconds_to_deadline(kInitialBackOffMs * 2))); |
|
const gpr_timespec t1 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
const grpc_core::Duration waited = |
|
grpc_core::Duration::FromTimespec(gpr_time_sub(t1, t0)); |
|
gpr_log(GPR_DEBUG, "Waited %" PRId64 " milliseconds", waited.millis()); |
|
// We should have waited at least kInitialBackOffMs. We substract one to |
|
// account for test and precision accuracy drift. |
|
EXPECT_GE(waited.millis(), |
|
(kInitialBackOffMs * grpc_test_slowdown_factor()) - 1); |
|
// But not much more. |
|
EXPECT_GT( |
|
gpr_time_cmp( |
|
grpc_timeout_milliseconds_to_deadline(kInitialBackOffMs * 1.10), t1), |
|
0); |
|
} |
|
|
|
TEST_F(PickFirstTest, BackOffMinReconnect) { |
|
ChannelArguments args; |
|
constexpr int kMinReconnectBackOffMs = 1000; |
|
args.SetInt(GRPC_ARG_MIN_RECONNECT_BACKOFF_MS, |
|
kMinReconnectBackOffMs * grpc_test_slowdown_factor()); |
|
const std::vector<int> ports = {grpc_pick_unused_port_or_die()}; |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
// Make connection delay a 10% longer than it's willing to in order to make |
|
// sure we are hitting the codepath that waits for the min reconnect backoff. |
|
ConnectionAttemptInjector injector; |
|
injector.SetDelay(grpc_core::Duration::Milliseconds( |
|
kMinReconnectBackOffMs * grpc_test_slowdown_factor() * 1.10)); |
|
const gpr_timespec t0 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
channel->WaitForConnected( |
|
grpc_timeout_milliseconds_to_deadline(kMinReconnectBackOffMs * 2)); |
|
const gpr_timespec t1 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
const grpc_core::Duration waited = |
|
grpc_core::Duration::FromTimespec(gpr_time_sub(t1, t0)); |
|
gpr_log(GPR_DEBUG, "Waited %" PRId64 " milliseconds", waited.millis()); |
|
// We should have waited at least kMinReconnectBackOffMs. We substract one to |
|
// account for test and precision accuracy drift. |
|
EXPECT_GE(waited.millis(), |
|
(kMinReconnectBackOffMs * grpc_test_slowdown_factor()) - 1); |
|
} |
|
|
|
TEST_F(PickFirstTest, ResetConnectionBackoff) { |
|
ChannelArguments args; |
|
constexpr int kInitialBackOffMs = 1000; |
|
args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, |
|
kInitialBackOffMs * grpc_test_slowdown_factor()); |
|
const std::vector<int> ports = {grpc_pick_unused_port_or_die()}; |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
// The channel won't become connected (there's no server). |
|
EXPECT_FALSE( |
|
channel->WaitForConnected(grpc_timeout_milliseconds_to_deadline(10))); |
|
// Bring up a server on the chosen port. |
|
StartServers(1, ports); |
|
const gpr_timespec t0 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
// Wait for connect, but not long enough. This proves that we're |
|
// being throttled by initial backoff. |
|
EXPECT_FALSE( |
|
channel->WaitForConnected(grpc_timeout_milliseconds_to_deadline(10))); |
|
// Reset connection backoff. |
|
experimental::ChannelResetConnectionBackoff(channel.get()); |
|
// Wait for connect. Should happen as soon as the client connects to |
|
// the newly started server, which should be before the initial |
|
// backoff timeout elapses. |
|
EXPECT_TRUE(channel->WaitForConnected( |
|
grpc_timeout_milliseconds_to_deadline(kInitialBackOffMs))); |
|
const gpr_timespec t1 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
const grpc_core::Duration waited = |
|
grpc_core::Duration::FromTimespec(gpr_time_sub(t1, t0)); |
|
gpr_log(GPR_DEBUG, "Waited %" PRId64 " milliseconds", waited.millis()); |
|
// We should have waited less than kInitialBackOffMs. |
|
EXPECT_LT(waited.millis(), kInitialBackOffMs * grpc_test_slowdown_factor()); |
|
} |
|
|
|
TEST_F(ClientLbEnd2endTest, |
|
ResetConnectionBackoffNextAttemptStartsImmediately) { |
|
// Start connection injector. |
|
ConnectionAttemptInjector injector; |
|
// Create client. |
|
const int port = grpc_pick_unused_port_or_die(); |
|
ChannelArguments args; |
|
const int kInitialBackOffMs = 5000; |
|
args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, |
|
kInitialBackOffMs * grpc_test_slowdown_factor()); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({port}); |
|
// Intercept initial connection attempt. |
|
auto hold1 = injector.AddHold(port); |
|
gpr_log(GPR_INFO, "=== TRIGGERING INITIAL CONNECTION ATTEMPT"); |
|
EXPECT_EQ(GRPC_CHANNEL_IDLE, channel->GetState(/*try_to_connect=*/true)); |
|
hold1->Wait(); |
|
EXPECT_EQ(GRPC_CHANNEL_CONNECTING, |
|
channel->GetState(/*try_to_connect=*/false)); |
|
// Reset backoff. |
|
gpr_log(GPR_INFO, "=== RESETTING BACKOFF"); |
|
experimental::ChannelResetConnectionBackoff(channel.get()); |
|
// Intercept next attempt. Do this before resuming the first attempt, |
|
// just in case the client makes progress faster than this thread. |
|
auto hold2 = injector.AddHold(port); |
|
// Fail current attempt and wait for next one to start. |
|
gpr_log(GPR_INFO, "=== RESUMING INITIAL ATTEMPT"); |
|
const gpr_timespec t0 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
hold1->Resume(); |
|
gpr_log(GPR_INFO, "=== WAITING FOR SECOND ATTEMPT"); |
|
// This WaitForStateChange() call just makes sure we're doing some polling. |
|
EXPECT_TRUE(channel->WaitForStateChange(GRPC_CHANNEL_CONNECTING, |
|
grpc_timeout_seconds_to_deadline(1))); |
|
hold2->Wait(); |
|
const gpr_timespec t1 = gpr_now(GPR_CLOCK_MONOTONIC); |
|
gpr_log(GPR_INFO, "=== RESUMING SECOND ATTEMPT"); |
|
hold2->Resume(); |
|
// Elapsed time should be very short, much less than kInitialBackOffMs. |
|
const grpc_core::Duration waited = |
|
grpc_core::Duration::FromTimespec(gpr_time_sub(t1, t0)); |
|
gpr_log(GPR_DEBUG, "Waited %" PRId64 " milliseconds", waited.millis()); |
|
EXPECT_LT(waited.millis(), 1000 * grpc_test_slowdown_factor()); |
|
} |
|
|
|
TEST_F( |
|
PickFirstTest, |
|
TriesAllSubchannelsBeforeReportingTransientFailureWithSubchannelSharing) { |
|
// Start connection injector. |
|
ConnectionAttemptInjector injector; |
|
// Get 5 unused ports. Each channel will have 2 unique ports followed |
|
// by a common port. |
|
std::vector<int> ports1 = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die()}; |
|
std::vector<int> ports2 = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die(), ports1[2]}; |
|
// Create channel 1. |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("pick_first", response_generator1); |
|
auto stub1 = BuildStub(channel1); |
|
response_generator1.SetNextResolution(ports1); |
|
// Allow the connection attempts for ports 0 and 1 to fail normally. |
|
// Inject a hold for the connection attempt to port 2. |
|
auto hold_channel1_port2 = injector.AddHold(ports1[2]); |
|
// Trigger connection attempt. |
|
gpr_log(GPR_INFO, "=== START CONNECTING CHANNEL 1 ==="); |
|
channel1->GetState(/*try_to_connect=*/true); |
|
// Wait for connection attempt to port 2. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL 1 PORT 2 TO START ==="); |
|
hold_channel1_port2->Wait(); |
|
gpr_log(GPR_INFO, "=== CHANNEL 1 PORT 2 STARTED ==="); |
|
// Now create channel 2. |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("pick_first", response_generator2); |
|
response_generator2.SetNextResolution(ports2); |
|
// Inject a hold for port 0. |
|
auto hold_channel2_port0 = injector.AddHold(ports2[0]); |
|
// Trigger connection attempt. |
|
gpr_log(GPR_INFO, "=== START CONNECTING CHANNEL 2 ==="); |
|
channel2->GetState(/*try_to_connect=*/true); |
|
// Wait for connection attempt to port 0. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL 2 PORT 0 TO START ==="); |
|
hold_channel2_port0->Wait(); |
|
gpr_log(GPR_INFO, "=== CHANNEL 2 PORT 0 STARTED ==="); |
|
// Inject a hold for port 0, which will be retried by channel 1. |
|
auto hold_channel1_port0 = injector.AddHold(ports1[0]); |
|
// Now allow the connection attempt to port 2 to complete. The subchannel |
|
// will deliver a TRANSIENT_FAILURE notification to both channels. |
|
gpr_log(GPR_INFO, "=== RESUMING CHANNEL 1 PORT 2 ==="); |
|
hold_channel1_port2->Resume(); |
|
// Wait for channel 1 to retry port 0, so that we know it's seen the |
|
// connectivity state notification for port 2. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL 1 PORT 0 ==="); |
|
hold_channel1_port0->Wait(); |
|
gpr_log(GPR_INFO, "=== CHANNEL 1 PORT 0 STARTED ==="); |
|
// Channel 1 should now report TRANSIENT_FAILURE. |
|
// Channel 2 should continue to report CONNECTING. |
|
EXPECT_EQ(GRPC_CHANNEL_TRANSIENT_FAILURE, channel1->GetState(false)); |
|
EXPECT_EQ(GRPC_CHANNEL_CONNECTING, channel2->GetState(false)); |
|
// Inject a hold for port 2, which will eventually be tried by channel 2. |
|
auto hold_channel2_port2 = injector.AddHold(ports2[2]); |
|
// Allow channel 2 to resume port 0. Port 0 will fail, as will port 1. |
|
gpr_log(GPR_INFO, "=== RESUMING CHANNEL 2 PORT 0 ==="); |
|
hold_channel2_port0->Resume(); |
|
// Wait for channel 2 to try port 2. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL 2 PORT 2 ==="); |
|
hold_channel2_port2->Wait(); |
|
gpr_log(GPR_INFO, "=== CHANNEL 2 PORT 2 STARTED ==="); |
|
// Channel 2 should still be CONNECTING here. |
|
EXPECT_EQ(GRPC_CHANNEL_CONNECTING, channel2->GetState(false)); |
|
// Add a hold for channel 2 port 0. |
|
hold_channel2_port0 = injector.AddHold(ports2[0]); |
|
gpr_log(GPR_INFO, "=== RESUMING CHANNEL 2 PORT 2 ==="); |
|
hold_channel2_port2->Resume(); |
|
// Wait for channel 2 to retry port 0. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL 2 PORT 0 ==="); |
|
hold_channel2_port0->Wait(); |
|
// Now channel 2 should be reporting TRANSIENT_FAILURE. |
|
EXPECT_EQ(GRPC_CHANNEL_TRANSIENT_FAILURE, channel2->GetState(false)); |
|
// Clean up. |
|
gpr_log(GPR_INFO, "=== RESUMING CHANNEL 1 PORT 0 AND CHANNEL 2 PORT 0 ==="); |
|
hold_channel1_port0->Resume(); |
|
hold_channel2_port0->Resume(); |
|
} |
|
|
|
TEST_F(PickFirstTest, Updates) { |
|
// Start servers and send one RPC per server. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
|
|
std::vector<int> ports; |
|
|
|
// Perform one RPC against the first server. |
|
ports.emplace_back(servers_[0]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [0] *******"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(servers_[0]->service_.request_count(), 1); |
|
|
|
// An empty update will result in the channel going into TRANSIENT_FAILURE. |
|
ports.clear(); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET none *******"); |
|
grpc_connectivity_state channel_state; |
|
do { |
|
channel_state = channel->GetState(true /* try to connect */); |
|
} while (channel_state == GRPC_CHANNEL_READY); |
|
ASSERT_NE(channel_state, GRPC_CHANNEL_READY); |
|
servers_[0]->service_.ResetCounters(); |
|
|
|
// Next update introduces servers_[1], making the channel recover. |
|
ports.clear(); |
|
ports.emplace_back(servers_[1]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [1] *******"); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
EXPECT_EQ(servers_[0]->service_.request_count(), 0); |
|
|
|
// And again for servers_[2] |
|
ports.clear(); |
|
ports.emplace_back(servers_[2]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [2] *******"); |
|
WaitForServer(DEBUG_LOCATION, stub, 2); |
|
EXPECT_EQ(servers_[0]->service_.request_count(), 0); |
|
EXPECT_EQ(servers_[1]->service_.request_count(), 0); |
|
|
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, UpdateSuperset) { |
|
// Start servers and send one RPC per server. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
|
|
std::vector<int> ports; |
|
|
|
// Perform one RPC against the first server. |
|
ports.emplace_back(servers_[0]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [0] *******"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(servers_[0]->service_.request_count(), 1); |
|
servers_[0]->service_.ResetCounters(); |
|
|
|
// Send and superset update |
|
ports.clear(); |
|
ports.emplace_back(servers_[1]->port_); |
|
ports.emplace_back(servers_[0]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET superset *******"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
// We stick to the previously connected server. |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
|
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, UpdateToUnconnected) { |
|
const int kNumServers = 2; |
|
CreateServers(kNumServers); |
|
StartServer(0); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
|
|
std::vector<int> ports; |
|
|
|
// Try to send rpcs against a list where the server is available. |
|
ports.emplace_back(servers_[0]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [0] *******"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
|
|
// Send resolution for which all servers are currently unavailable. Eventually |
|
// this triggers replacing the existing working subchannel_list with the new |
|
// currently unresponsive list. |
|
ports.clear(); |
|
ports.emplace_back(grpc_pick_unused_port_or_die()); |
|
ports.emplace_back(servers_[1]->port_); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** SET [unavailable] *******"); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
|
|
// Ensure that the last resolution was installed correctly by verifying that |
|
// the channel becomes ready once one of if its endpoints becomes available. |
|
gpr_log(GPR_INFO, "****** StartServer(1) *******"); |
|
StartServer(1); |
|
EXPECT_TRUE(WaitForChannelReady(channel.get())); |
|
} |
|
|
|
TEST_F(PickFirstTest, GlobalSubchannelPool) { |
|
// Start one server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
std::vector<int> ports = GetServersPorts(); |
|
// Create two channels that (by default) use the global subchannel pool. |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("pick_first", response_generator1); |
|
auto stub1 = BuildStub(channel1); |
|
response_generator1.SetNextResolution(ports); |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("pick_first", response_generator2); |
|
auto stub2 = BuildStub(channel2); |
|
response_generator2.SetNextResolution(ports); |
|
WaitForServer(DEBUG_LOCATION, stub1, 0); |
|
// Send one RPC on each channel. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub1); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub2); |
|
// The server receives two requests. |
|
EXPECT_EQ(2, servers_[0]->service_.request_count()); |
|
// The two requests are from the same client port, because the two channels |
|
// share subchannels via the global subchannel pool. |
|
EXPECT_EQ(1UL, servers_[0]->service_.clients().size()); |
|
} |
|
|
|
TEST_F(PickFirstTest, LocalSubchannelPool) { |
|
// Start one server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
std::vector<int> ports = GetServersPorts(); |
|
// Create two channels that use local subchannel pool. |
|
ChannelArguments args; |
|
args.SetInt(GRPC_ARG_USE_LOCAL_SUBCHANNEL_POOL, 1); |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("pick_first", response_generator1, args); |
|
auto stub1 = BuildStub(channel1); |
|
response_generator1.SetNextResolution(ports); |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("pick_first", response_generator2, args); |
|
auto stub2 = BuildStub(channel2); |
|
response_generator2.SetNextResolution(ports); |
|
WaitForServer(DEBUG_LOCATION, stub1, 0); |
|
// Send one RPC on each channel. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub1); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub2); |
|
// The server receives two requests. |
|
EXPECT_EQ(2, servers_[0]->service_.request_count()); |
|
// The two requests are from two client ports, because the two channels didn't |
|
// share subchannels with each other. |
|
EXPECT_EQ(2UL, servers_[0]->service_.clients().size()); |
|
} |
|
|
|
TEST_F(PickFirstTest, ManyUpdates) { |
|
const int kNumUpdates = 1000; |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
std::vector<int> ports = GetServersPorts(); |
|
for (size_t i = 0; i < kNumUpdates; ++i) { |
|
std::shuffle(ports.begin(), ports.end(), |
|
std::mt19937(std::random_device()())); |
|
response_generator.SetNextResolution(ports); |
|
// We should re-enter core at the end of the loop to give the resolution |
|
// setting closure a chance to run. |
|
if ((i + 1) % 10 == 0) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, ReresolutionNoSelected) { |
|
// Prepare the ports for up servers and down servers. |
|
const int kNumServers = 3; |
|
const int kNumAliveServers = 1; |
|
StartServers(kNumAliveServers); |
|
std::vector<int> alive_ports, dead_ports; |
|
for (size_t i = 0; i < kNumServers; ++i) { |
|
if (i < kNumAliveServers) { |
|
alive_ports.emplace_back(servers_[i]->port_); |
|
} else { |
|
dead_ports.emplace_back(grpc_pick_unused_port_or_die()); |
|
} |
|
} |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
// The initial resolution only contains dead ports. There won't be any |
|
// selected subchannel. Re-resolution will return the same result. |
|
response_generator.SetNextResolution(dead_ports); |
|
gpr_log(GPR_INFO, "****** INITIAL RESOLUTION SET *******"); |
|
for (size_t i = 0; i < 10; ++i) { |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"failed to connect to all addresses; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
} |
|
// Set a re-resolution result that contains reachable ports, so that the |
|
// pick_first LB policy can recover soon. |
|
response_generator.SetNextResolutionUponError(alive_ports); |
|
gpr_log(GPR_INFO, "****** RE-RESOLUTION SET *******"); |
|
WaitForServer(DEBUG_LOCATION, stub, 0, [](const Status& status) { |
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code()); |
|
EXPECT_THAT(status.error_message(), |
|
::testing::ContainsRegex( |
|
"failed to connect to all addresses; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)")); |
|
}); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(servers_[0]->service_.request_count(), 1); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, ReconnectWithoutNewResolverResult) { |
|
std::vector<int> ports = {grpc_pick_unused_port_or_die()}; |
|
StartServers(1, ports); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** INITIAL CONNECTION *******"); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
gpr_log(GPR_INFO, "****** STOPPING SERVER ******"); |
|
servers_[0]->Shutdown(); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
gpr_log(GPR_INFO, "****** RESTARTING SERVER ******"); |
|
StartServers(1, ports); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
} |
|
|
|
TEST_F(PickFirstTest, ReconnectWithoutNewResolverResultStartsFromTopOfList) { |
|
std::vector<int> ports = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die()}; |
|
CreateServers(2, ports); |
|
StartServer(1); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** INITIAL CONNECTION *******"); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
gpr_log(GPR_INFO, "****** STOPPING SERVER ******"); |
|
servers_[1]->Shutdown(); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
gpr_log(GPR_INFO, "****** STARTING BOTH SERVERS ******"); |
|
StartServers(2, ports); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
} |
|
|
|
TEST_F(PickFirstTest, CheckStateBeforeStartWatch) { |
|
std::vector<int> ports = {grpc_pick_unused_port_or_die()}; |
|
StartServers(1, ports); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel_1 = BuildChannel("pick_first", response_generator); |
|
auto stub_1 = BuildStub(channel_1); |
|
response_generator.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** RESOLUTION SET FOR CHANNEL 1 *******"); |
|
WaitForServer(DEBUG_LOCATION, stub_1, 0); |
|
gpr_log(GPR_INFO, "****** CHANNEL 1 CONNECTED *******"); |
|
servers_[0]->Shutdown(); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel_1.get())); |
|
// Channel 1 will receive a re-resolution containing the same server. It will |
|
// create a new subchannel and hold a ref to it. |
|
StartServers(1, ports); |
|
gpr_log(GPR_INFO, "****** SERVER RESTARTED *******"); |
|
auto response_generator_2 = BuildResolverResponseGenerator(); |
|
auto channel_2 = BuildChannel("pick_first", response_generator_2); |
|
auto stub_2 = BuildStub(channel_2); |
|
response_generator_2.SetNextResolution(ports); |
|
gpr_log(GPR_INFO, "****** RESOLUTION SET FOR CHANNEL 2 *******"); |
|
WaitForServer(DEBUG_LOCATION, stub_2, 0); |
|
gpr_log(GPR_INFO, "****** CHANNEL 2 CONNECTED *******"); |
|
servers_[0]->Shutdown(); |
|
// Wait until the disconnection has triggered the connectivity notification. |
|
// Otherwise, the subchannel may be picked for next call but will fail soon. |
|
EXPECT_TRUE(WaitForChannelNotReady(channel_2.get())); |
|
// Channel 2 will also receive a re-resolution containing the same server. |
|
// Both channels will ref the same subchannel that failed. |
|
StartServers(1, ports); |
|
gpr_log(GPR_INFO, "****** SERVER RESTARTED AGAIN *******"); |
|
gpr_log(GPR_INFO, "****** CHANNEL 2 STARTING A CALL *******"); |
|
// The first call after the server restart will succeed. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub_2); |
|
gpr_log(GPR_INFO, "****** CHANNEL 2 FINISHED A CALL *******"); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel_1->GetLoadBalancingPolicyName()); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("pick_first", channel_2->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(PickFirstTest, IdleOnDisconnect) { |
|
// Start server, send RPC, and make sure channel is READY. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("", response_generator); // pick_first is the default. |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
// Stop server. Channel should go into state IDLE. |
|
response_generator.SetFailureOnReresolution(); |
|
servers_[0]->Shutdown(); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_IDLE); |
|
servers_.clear(); |
|
} |
|
|
|
TEST_F(PickFirstTest, PendingUpdateAndSelectedSubchannelFails) { |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("", response_generator); // pick_first is the default. |
|
auto stub = BuildStub(channel); |
|
StartServers(2); |
|
// Initially resolve to first server and make sure it connects. |
|
gpr_log(GPR_INFO, "Phase 1: Connect to first server."); |
|
response_generator.SetNextResolution({servers_[0]->port_}); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub, true /* wait_for_ready */); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
ConnectionAttemptInjector injector; |
|
auto hold = injector.AddHold(servers_[1]->port_); |
|
// Send a resolution update with the remaining servers, none of which are |
|
// running yet, so the update will stay pending. |
|
gpr_log(GPR_INFO, |
|
"Phase 2: Resolver update pointing to remaining " |
|
"(not started) servers."); |
|
response_generator.SetNextResolution(GetServersPorts(1 /* start_index */)); |
|
// Add hold before connection attempt to ensure RPCs will be sent to first |
|
// server. Otherwise, pending subchannel list might already have gone into |
|
// TRANSIENT_FAILURE due to hitting the end of the server list by the time |
|
// we check the state. |
|
hold->Wait(); |
|
// RPCs will continue to be sent to the first server. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
// Now stop the first server, so that the current subchannel list |
|
// fails. This should cause us to immediately swap over to the |
|
// pending list, even though it's not yet connected. The state should |
|
// be set to CONNECTING, since that's what the pending subchannel list |
|
// was doing when we swapped over. |
|
gpr_log(GPR_INFO, "Phase 3: Stopping first server."); |
|
servers_[0]->Shutdown(); |
|
WaitForChannelNotReady(channel.get()); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_CONNECTING); |
|
// Resume connection attempt to second server now that first server is down. |
|
// The channel should go to READY state and RPCs should go to the second |
|
// server. |
|
gpr_log(GPR_INFO, "Phase 4: Resuming connection attempt to second server."); |
|
hold->Resume(); |
|
WaitForChannelReady(channel.get()); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
} |
|
|
|
TEST_F(PickFirstTest, StaysIdleUponEmptyUpdate) { |
|
// Start server, send RPC, and make sure channel is READY. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("", response_generator); // pick_first is the default. |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
// Stop server. Channel should go into state IDLE. |
|
servers_[0]->Shutdown(); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_IDLE); |
|
// Now send resolver update that includes no addresses. Channel |
|
// should stay in state IDLE. |
|
response_generator.SetNextResolution({}); |
|
EXPECT_FALSE(channel->WaitForStateChange( |
|
GRPC_CHANNEL_IDLE, grpc_timeout_seconds_to_deadline(3))); |
|
// Now bring the backend back up and send a non-empty resolver update, |
|
// and then try to send an RPC. Channel should go back into state READY. |
|
StartServer(0); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_READY); |
|
} |
|
|
|
TEST_F(PickFirstTest, |
|
StaysTransientFailureOnFailedConnectionAttemptUntilReady) { |
|
// Allocate 3 ports, with no servers running. |
|
std::vector<int> ports = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die()}; |
|
// Create channel with a 1-second backoff. |
|
ChannelArguments args; |
|
args.SetInt(GRPC_ARG_INITIAL_RECONNECT_BACKOFF_MS, |
|
1000 * grpc_test_slowdown_factor()); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
EXPECT_EQ(GRPC_CHANNEL_IDLE, channel->GetState(false)); |
|
// Send an RPC, which should fail. |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"failed to connect to all addresses; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
// Channel should be in TRANSIENT_FAILURE. |
|
EXPECT_EQ(GRPC_CHANNEL_TRANSIENT_FAILURE, channel->GetState(false)); |
|
// Now start a server on the last port. |
|
StartServers(1, {ports.back()}); |
|
// Channel should remain in TRANSIENT_FAILURE until it transitions to READY. |
|
EXPECT_TRUE(channel->WaitForStateChange(GRPC_CHANNEL_TRANSIENT_FAILURE, |
|
grpc_timeout_seconds_to_deadline(4))); |
|
EXPECT_EQ(GRPC_CHANNEL_READY, channel->GetState(false)); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
|
|
// |
|
// round_robin tests |
|
// |
|
|
|
using RoundRobinTest = ClientLbEnd2endTest; |
|
|
|
TEST_F(RoundRobinTest, Basic) { |
|
// Start servers and send one RPC per server. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Wait until all backends are ready. |
|
do { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} while (!SeenAllServers()); |
|
ResetCounters(); |
|
// "Sync" to the end of the list. Next sequence of picks will start at the |
|
// first server (index 0). |
|
WaitForServer(DEBUG_LOCATION, stub, servers_.size() - 1); |
|
std::vector<int> connection_order; |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
UpdateConnectionOrder(servers_, &connection_order); |
|
} |
|
// Backends should be iterated over in the order in which the addresses were |
|
// given. |
|
const auto expected = std::vector<int>{0, 1, 2}; |
|
EXPECT_EQ(expected, connection_order); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("round_robin", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(RoundRobinTest, ProcessPending) { |
|
StartServers(1); // Single server |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({servers_[0]->port_}); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
// Create a new channel and its corresponding RR LB policy, which will pick |
|
// the subchannels in READY state from the previous RPC against the same |
|
// target (even if it happened over a different channel, because subchannels |
|
// are globally reused). Progress should happen without any transition from |
|
// this READY state. |
|
auto second_response_generator = BuildResolverResponseGenerator(); |
|
auto second_channel = BuildChannel("round_robin", second_response_generator); |
|
auto second_stub = BuildStub(second_channel); |
|
second_response_generator.SetNextResolution({servers_[0]->port_}); |
|
CheckRpcSendOk(DEBUG_LOCATION, second_stub); |
|
} |
|
|
|
TEST_F(RoundRobinTest, Updates) { |
|
// Start servers. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Start with a single server. |
|
gpr_log(GPR_INFO, "*** FIRST BACKEND ***"); |
|
std::vector<int> ports = {servers_[0]->port_}; |
|
response_generator.SetNextResolution(ports); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
// Send RPCs. They should all go servers_[0] |
|
for (size_t i = 0; i < 10; ++i) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(10, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[2]->service_.request_count()); |
|
ResetCounters(); |
|
// And now for the second server. |
|
gpr_log(GPR_INFO, "*** SECOND BACKEND ***"); |
|
ports.clear(); |
|
ports.emplace_back(servers_[1]->port_); |
|
response_generator.SetNextResolution(ports); |
|
// Wait until update has been processed, as signaled by the second backend |
|
// receiving a request. |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
for (size_t i = 0; i < 10; ++i) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(0, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(10, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[2]->service_.request_count()); |
|
ResetCounters(); |
|
// ... and for the last server. |
|
gpr_log(GPR_INFO, "*** THIRD BACKEND ***"); |
|
ports.clear(); |
|
ports.emplace_back(servers_[2]->port_); |
|
response_generator.SetNextResolution(ports); |
|
WaitForServer(DEBUG_LOCATION, stub, 2); |
|
for (size_t i = 0; i < 10; ++i) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(0, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(10, servers_[2]->service_.request_count()); |
|
ResetCounters(); |
|
// Back to all servers. |
|
gpr_log(GPR_INFO, "*** ALL BACKENDS ***"); |
|
ports.clear(); |
|
ports.emplace_back(servers_[0]->port_); |
|
ports.emplace_back(servers_[1]->port_); |
|
ports.emplace_back(servers_[2]->port_); |
|
response_generator.SetNextResolution(ports); |
|
WaitForServers(DEBUG_LOCATION, stub); |
|
// Send three RPCs, one per server. |
|
for (size_t i = 0; i < 3; ++i) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(1, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(1, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(1, servers_[2]->service_.request_count()); |
|
ResetCounters(); |
|
// An empty update will result in the channel going into TRANSIENT_FAILURE. |
|
gpr_log(GPR_INFO, "*** NO BACKENDS ***"); |
|
ports.clear(); |
|
response_generator.SetNextResolution(ports); |
|
WaitForChannelNotReady(channel.get()); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"empty address list: fake resolver empty address list"); |
|
servers_[0]->service_.ResetCounters(); |
|
// Next update introduces servers_[1], making the channel recover. |
|
gpr_log(GPR_INFO, "*** BACK TO SECOND BACKEND ***"); |
|
ports.clear(); |
|
ports.emplace_back(servers_[1]->port_); |
|
response_generator.SetNextResolution(ports); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
EXPECT_EQ(GRPC_CHANNEL_READY, channel->GetState(/*try_to_connect=*/false)); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("round_robin", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(RoundRobinTest, UpdateInError) { |
|
StartServers(2); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Start with a single server. |
|
response_generator.SetNextResolution(GetServersPorts(0, 1)); |
|
// Send RPCs. They should all go to server 0. |
|
for (size_t i = 0; i < 10; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub, /*wait_for_ready=*/false, |
|
/*load_report=*/nullptr, /*timeout_ms=*/4000); |
|
} |
|
EXPECT_EQ(10, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
servers_[0]->service_.ResetCounters(); |
|
// Send an update adding an unreachable server and server 1. |
|
std::vector<int> ports = {servers_[0]->port_, grpc_pick_unused_port_or_die(), |
|
servers_[1]->port_}; |
|
response_generator.SetNextResolution(ports); |
|
WaitForServers(DEBUG_LOCATION, stub, 0, 2, /*status_check=*/nullptr, |
|
/*timeout=*/absl::Seconds(60)); |
|
// Send a bunch more RPCs. They should all succeed and should be |
|
// split evenly between the two servers. |
|
// Note: The split may be slightly uneven because of an extra picker |
|
// update that can happen if the subchannels for servers 0 and 1 |
|
// report READY before the subchannel for the unreachable server |
|
// transitions from CONNECTING to TRANSIENT_FAILURE. |
|
for (size_t i = 0; i < 10; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub, /*wait_for_ready=*/false, |
|
/*load_report=*/nullptr, /*timeout_ms=*/4000); |
|
} |
|
EXPECT_THAT(servers_[0]->service_.request_count(), |
|
::testing::AllOf(::testing::Ge(4), ::testing::Le(6))); |
|
EXPECT_THAT(servers_[1]->service_.request_count(), |
|
::testing::AllOf(::testing::Ge(4), ::testing::Le(6))); |
|
EXPECT_EQ(10, servers_[0]->service_.request_count() + |
|
servers_[1]->service_.request_count()); |
|
} |
|
|
|
TEST_F(RoundRobinTest, ManyUpdates) { |
|
// Start servers and send one RPC per server. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
std::vector<int> ports = GetServersPorts(); |
|
for (size_t i = 0; i < 1000; ++i) { |
|
std::shuffle(ports.begin(), ports.end(), |
|
std::mt19937(std::random_device()())); |
|
response_generator.SetNextResolution(ports); |
|
if (i % 10 == 0) CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("round_robin", channel->GetLoadBalancingPolicyName()); |
|
} |
|
|
|
TEST_F(RoundRobinTest, ReresolveOnSubchannelConnectionFailure) { |
|
// Start 3 servers. |
|
StartServers(3); |
|
// Create channel. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Initially, tell the channel about only the first two servers. |
|
std::vector<int> ports = {servers_[0]->port_, servers_[1]->port_}; |
|
response_generator.SetNextResolution(ports); |
|
// Wait for both servers to be seen. |
|
WaitForServers(DEBUG_LOCATION, stub, 0, 2); |
|
// Tell the fake resolver to send an update that adds the last server, but |
|
// only when the LB policy requests re-resolution. |
|
ports.push_back(servers_[2]->port_); |
|
response_generator.SetNextResolutionUponError(ports); |
|
// Have server 0 send a GOAWAY. This should trigger a re-resolution. |
|
gpr_log(GPR_INFO, "****** SENDING GOAWAY FROM SERVER 0 *******"); |
|
{ |
|
grpc_core::ExecCtx exec_ctx; |
|
grpc_core::Server::FromC(servers_[0]->server_->c_server())->SendGoaways(); |
|
} |
|
// Wait for the client to see server 2. |
|
WaitForServer(DEBUG_LOCATION, stub, 2); |
|
} |
|
|
|
TEST_F(RoundRobinTest, TransientFailure) { |
|
// Start servers and create channel. Channel should go to READY state. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
EXPECT_TRUE(WaitForChannelReady(channel.get())); |
|
// Now kill the servers. The channel should transition to TRANSIENT_FAILURE. |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
servers_[i]->Shutdown(); |
|
} |
|
auto predicate = [](grpc_connectivity_state state) { |
|
return state == GRPC_CHANNEL_TRANSIENT_FAILURE; |
|
}; |
|
EXPECT_TRUE(WaitForChannelState(channel.get(), predicate)); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
} |
|
|
|
TEST_F(RoundRobinTest, TransientFailureAtStartup) { |
|
// Create channel and return servers that don't exist. Channel should |
|
// quickly transition into TRANSIENT_FAILURE. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({ |
|
grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die(), |
|
}); |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
servers_[i]->Shutdown(); |
|
} |
|
auto predicate = [](grpc_connectivity_state state) { |
|
return state == GRPC_CHANNEL_TRANSIENT_FAILURE; |
|
}; |
|
EXPECT_TRUE(WaitForChannelState(channel.get(), predicate, true)); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
} |
|
|
|
TEST_F(RoundRobinTest, StaysInTransientFailureInSubsequentConnecting) { |
|
// Start connection injector. |
|
ConnectionAttemptInjector injector; |
|
// Get port. |
|
const int port = grpc_pick_unused_port_or_die(); |
|
// Create channel. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({port}); |
|
// Allow first connection attempt to fail normally, and wait for |
|
// channel to report TRANSIENT_FAILURE. |
|
gpr_log(GPR_INFO, "=== WAITING FOR CHANNEL TO REPORT TF ==="); |
|
auto predicate = [](grpc_connectivity_state state) { |
|
return state == GRPC_CHANNEL_TRANSIENT_FAILURE; |
|
}; |
|
EXPECT_TRUE( |
|
WaitForChannelState(channel.get(), predicate, /*try_to_connect=*/true)); |
|
// Wait for next connection attempt to start. |
|
auto hold = injector.AddHold(port); |
|
hold->Wait(); |
|
// Now the subchannel should be reporting CONNECTING. Make sure the |
|
// channel is still in TRANSIENT_FAILURE and is still reporting the |
|
// right status. |
|
EXPECT_EQ(GRPC_CHANNEL_TRANSIENT_FAILURE, channel->GetState(false)); |
|
// Send a few RPCs, just to give the channel a chance to propagate a |
|
// new picker, in case it was going to incorrectly do so. |
|
gpr_log(GPR_INFO, "=== EXPECTING RPCs TO FAIL ==="); |
|
for (size_t i = 0; i < 5; ++i) { |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
} |
|
// Clean up. |
|
hold->Resume(); |
|
} |
|
|
|
TEST_F(RoundRobinTest, ReportsLatestStatusInTransientFailure) { |
|
// Start connection injector. |
|
ConnectionAttemptInjector injector; |
|
// Get port. |
|
const std::vector<int> ports = {grpc_pick_unused_port_or_die(), |
|
grpc_pick_unused_port_or_die()}; |
|
// Create channel. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
// Allow first connection attempts to fail normally, and check that |
|
// the RPC fails with the right status message. |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
// Now intercept the next connection attempt for each port. |
|
auto hold1 = injector.AddHold(ports[0]); |
|
auto hold2 = injector.AddHold(ports[1]); |
|
hold1->Wait(); |
|
hold2->Wait(); |
|
// Inject a custom failure message. |
|
hold1->Wait(); |
|
hold1->Fail(GRPC_ERROR_CREATE_FROM_STATIC_STRING("Survey says... Bzzzzt!")); |
|
// Wait until RPC fails with the right message. |
|
absl::Time deadline = |
|
absl::Now() + (absl::Seconds(5) * grpc_test_slowdown_factor()); |
|
while (true) { |
|
Status status = SendRpc(stub); |
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code()); |
|
if (::testing::Matches(::testing::MatchesRegex( |
|
"connections to all backends failing; last error: " |
|
"UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Survey says... Bzzzzt!"))(status.error_message())) { |
|
break; |
|
} |
|
EXPECT_THAT(status.error_message(), |
|
::testing::MatchesRegex( |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)")); |
|
EXPECT_LT(absl::Now(), deadline); |
|
if (absl::Now() >= deadline) break; |
|
} |
|
// Clean up. |
|
hold2->Resume(); |
|
} |
|
|
|
TEST_F(RoundRobinTest, DoesNotFailRpcsUponDisconnection) { |
|
// Start connection injector. |
|
ConnectionAttemptInjector injector; |
|
// Start server. |
|
StartServers(1); |
|
// Create channel. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Start a thread constantly sending RPCs in a loop. |
|
gpr_log(GPR_ERROR, "=== STARTING CLIENT THREAD ==="); |
|
std::atomic<bool> shutdown{false}; |
|
gpr_event ev; |
|
gpr_event_init(&ev); |
|
std::thread thd([&]() { |
|
gpr_log(GPR_INFO, "sending first RPC"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
gpr_event_set(&ev, reinterpret_cast<void*>(1)); |
|
while (!shutdown.load()) { |
|
gpr_log(GPR_INFO, "sending RPC"); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
}); |
|
// Wait for first RPC to complete. |
|
gpr_log(GPR_ERROR, "=== WAITING FOR FIRST RPC TO COMPLETE ==="); |
|
ASSERT_EQ(reinterpret_cast<void*>(1), |
|
gpr_event_wait(&ev, grpc_timeout_seconds_to_deadline(1))); |
|
// Channel should now be READY. |
|
ASSERT_EQ(GRPC_CHANNEL_READY, channel->GetState(false)); |
|
// Tell injector to intercept the next connection attempt. |
|
auto hold1 = |
|
injector.AddHold(servers_[0]->port_, /*intercept_completion=*/true); |
|
// Now kill the server. The subchannel should report IDLE and be |
|
// immediately reconnected to, but this should not cause any test |
|
// failures. |
|
gpr_log(GPR_ERROR, "=== SHUTTING DOWN SERVER ==="); |
|
{ |
|
grpc_core::ExecCtx exec_ctx; |
|
grpc_core::Server::FromC(servers_[0]->server_->c_server())->SendGoaways(); |
|
} |
|
gpr_sleep_until(grpc_timeout_seconds_to_deadline(1)); |
|
servers_[0]->Shutdown(); |
|
// Wait for next attempt to start. |
|
gpr_log(GPR_ERROR, "=== WAITING FOR RECONNECTION ATTEMPT ==="); |
|
hold1->Wait(); |
|
// Start server and allow attempt to continue. |
|
gpr_log(GPR_ERROR, "=== RESTARTING SERVER ==="); |
|
StartServer(0); |
|
hold1->Resume(); |
|
// Wait for next attempt to complete. |
|
gpr_log(GPR_ERROR, "=== WAITING FOR RECONNECTION ATTEMPT TO COMPLETE ==="); |
|
hold1->WaitForCompletion(); |
|
// Now shut down the thread. |
|
gpr_log(GPR_ERROR, "=== SHUTTING DOWN CLIENT THREAD ==="); |
|
shutdown.store(true); |
|
thd.join(); |
|
} |
|
|
|
TEST_F(RoundRobinTest, SingleReconnect) { |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
const auto ports = GetServersPorts(); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(ports); |
|
WaitForServers(DEBUG_LOCATION, stub); |
|
// Sync to end of list. |
|
WaitForServer(DEBUG_LOCATION, stub, servers_.size() - 1); |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
EXPECT_EQ(1, servers_[i]->service_.request_count()) << "for backend #" << i; |
|
} |
|
// One request should have gone to each server. |
|
for (size_t i = 0; i < servers_.size(); ++i) { |
|
EXPECT_EQ(1, servers_[i]->service_.request_count()); |
|
} |
|
// Kill the first server. |
|
servers_[0]->StopListeningAndSendGoaways(); |
|
// Wait for client to notice that the backend is down. We know that's |
|
// happened when we see kNumServers RPCs that do not go to backend 0. |
|
ResetCounters(); |
|
SendRpcsUntil(DEBUG_LOCATION, stub, |
|
[&, num_rpcs_not_on_backend_0 = 0](Status status) mutable { |
|
EXPECT_TRUE(status.ok()) |
|
<< "code=" << status.error_code() |
|
<< " message=" << status.error_message(); |
|
if (servers_[0]->service_.request_count() == 1) { |
|
num_rpcs_not_on_backend_0 = 0; |
|
} else { |
|
++num_rpcs_not_on_backend_0; |
|
} |
|
ResetCounters(); |
|
return num_rpcs_not_on_backend_0 < kNumServers; |
|
}); |
|
// Send a bunch of RPCs. |
|
for (int i = 0; i < 10 * kNumServers; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// No requests have gone to the deceased server. |
|
EXPECT_EQ(0UL, servers_[0]->service_.request_count()); |
|
// Bring the first server back up. |
|
servers_[0]->Shutdown(); |
|
StartServer(0); |
|
// Requests should start arriving at the first server either right away (if |
|
// the server managed to start before the RR policy retried the subchannel) or |
|
// after the subchannel retry delay otherwise (RR's subchannel retried before |
|
// the server was fully back up). |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
} |
|
|
|
// If health checking is required by client but health checking service |
|
// is not running on the server, the channel should be treated as healthy. |
|
TEST_F(RoundRobinTest, ServersHealthCheckingUnimplementedTreatedAsHealthy) { |
|
StartServers(1); // Single server |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution({servers_[0]->port_}); |
|
EXPECT_TRUE(WaitForChannelReady(channel.get())); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
|
|
TEST_F(RoundRobinTest, HealthChecking) { |
|
EnableDefaultHealthCheckService(true); |
|
// Start servers. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Channel should not become READY, because health checks should be failing. |
|
gpr_log(GPR_INFO, |
|
"*** initial state: unknown health check service name for " |
|
"all servers"); |
|
EXPECT_FALSE(WaitForChannelReady(channel.get(), 1)); |
|
// Now set one of the servers to be healthy. |
|
// The channel should become healthy and all requests should go to |
|
// the healthy server. |
|
gpr_log(GPR_INFO, "*** server 0 healthy"); |
|
servers_[0]->SetServingStatus("health_check_service_name", true); |
|
EXPECT_TRUE(WaitForChannelReady(channel.get())); |
|
for (int i = 0; i < 10; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
EXPECT_EQ(10, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[2]->service_.request_count()); |
|
// Now set a second server to be healthy. |
|
gpr_log(GPR_INFO, "*** server 2 healthy"); |
|
servers_[2]->SetServingStatus("health_check_service_name", true); |
|
WaitForServer(DEBUG_LOCATION, stub, 2); |
|
for (int i = 0; i < 10; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
EXPECT_EQ(5, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(0, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(5, servers_[2]->service_.request_count()); |
|
// Now set the remaining server to be healthy. |
|
gpr_log(GPR_INFO, "*** server 1 healthy"); |
|
servers_[1]->SetServingStatus("health_check_service_name", true); |
|
WaitForServer(DEBUG_LOCATION, stub, 1); |
|
for (int i = 0; i < 9; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
EXPECT_EQ(3, servers_[0]->service_.request_count()); |
|
EXPECT_EQ(3, servers_[1]->service_.request_count()); |
|
EXPECT_EQ(3, servers_[2]->service_.request_count()); |
|
// Now set one server to be unhealthy again. Then wait until the |
|
// unhealthiness has hit the client. We know that the client will see |
|
// this when we send kNumServers requests and one of the remaining servers |
|
// sees two of the requests. |
|
gpr_log(GPR_INFO, "*** server 0 unhealthy"); |
|
servers_[0]->SetServingStatus("health_check_service_name", false); |
|
do { |
|
ResetCounters(); |
|
for (int i = 0; i < kNumServers; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
} while (servers_[1]->service_.request_count() != 2 && |
|
servers_[2]->service_.request_count() != 2); |
|
// Now set the remaining two servers to be unhealthy. Make sure the |
|
// channel leaves READY state and that RPCs fail. |
|
gpr_log(GPR_INFO, "*** all servers unhealthy"); |
|
servers_[1]->SetServingStatus("health_check_service_name", false); |
|
servers_[2]->SetServingStatus("health_check_service_name", false); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"UNAVAILABLE: backend unhealthy"); |
|
// Clean up. |
|
EnableDefaultHealthCheckService(false); |
|
} |
|
|
|
TEST_F(RoundRobinTest, HealthCheckingHandlesSubchannelFailure) { |
|
EnableDefaultHealthCheckService(true); |
|
// Start servers. |
|
const int kNumServers = 3; |
|
StartServers(kNumServers); |
|
servers_[0]->SetServingStatus("health_check_service_name", true); |
|
servers_[1]->SetServingStatus("health_check_service_name", true); |
|
servers_[2]->SetServingStatus("health_check_service_name", true); |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
WaitForServer(DEBUG_LOCATION, stub, 0); |
|
// Stop server 0 and send a new resolver result to ensure that RR |
|
// checks each subchannel's state. |
|
servers_[0]->StopListeningAndSendGoaways(); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Send a bunch more RPCs. |
|
for (size_t i = 0; i < 100; i++) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
} |
|
|
|
TEST_F(RoundRobinTest, WithHealthCheckingInhibitPerChannel) { |
|
EnableDefaultHealthCheckService(true); |
|
// Start server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
// Create a channel with health-checking enabled. |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"); |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("round_robin", response_generator1, args); |
|
auto stub1 = BuildStub(channel1); |
|
std::vector<int> ports = GetServersPorts(); |
|
response_generator1.SetNextResolution(ports); |
|
// Create a channel with health checking enabled but inhibited. |
|
args.SetInt(GRPC_ARG_INHIBIT_HEALTH_CHECKING, 1); |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("round_robin", response_generator2, args); |
|
auto stub2 = BuildStub(channel2); |
|
response_generator2.SetNextResolution(ports); |
|
// First channel should not become READY, because health checks should be |
|
// failing. |
|
EXPECT_FALSE(WaitForChannelReady(channel1.get(), 1)); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub1, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"UNAVAILABLE: backend unhealthy"); |
|
// Second channel should be READY. |
|
EXPECT_TRUE(WaitForChannelReady(channel2.get(), 1)); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub2); |
|
// Enable health checks on the backend and wait for channel 1 to succeed. |
|
servers_[0]->SetServingStatus("health_check_service_name", true); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub1, true /* wait_for_ready */); |
|
// Check that we created only one subchannel to the backend. |
|
EXPECT_EQ(1UL, servers_[0]->service_.clients().size()); |
|
// Clean up. |
|
EnableDefaultHealthCheckService(false); |
|
} |
|
|
|
TEST_F(RoundRobinTest, HealthCheckingServiceNamePerChannel) { |
|
EnableDefaultHealthCheckService(true); |
|
// Start server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
// Create a channel with health-checking enabled. |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"); |
|
auto response_generator1 = BuildResolverResponseGenerator(); |
|
auto channel1 = BuildChannel("round_robin", response_generator1, args); |
|
auto stub1 = BuildStub(channel1); |
|
std::vector<int> ports = GetServersPorts(); |
|
response_generator1.SetNextResolution(ports); |
|
// Create a channel with health-checking enabled with a different |
|
// service name. |
|
ChannelArguments args2; |
|
args2.SetServiceConfigJSON( |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name2\"}}"); |
|
auto response_generator2 = BuildResolverResponseGenerator(); |
|
auto channel2 = BuildChannel("round_robin", response_generator2, args2); |
|
auto stub2 = BuildStub(channel2); |
|
response_generator2.SetNextResolution(ports); |
|
// Allow health checks from channel 2 to succeed. |
|
servers_[0]->SetServingStatus("health_check_service_name2", true); |
|
// First channel should not become READY, because health checks should be |
|
// failing. |
|
EXPECT_FALSE(WaitForChannelReady(channel1.get(), 1)); |
|
CheckRpcSendFailure(DEBUG_LOCATION, stub1, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"UNAVAILABLE: backend unhealthy"); |
|
// Second channel should be READY. |
|
EXPECT_TRUE(WaitForChannelReady(channel2.get(), 1)); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub2); |
|
// Enable health checks for channel 1 and wait for it to succeed. |
|
servers_[0]->SetServingStatus("health_check_service_name", true); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub1, true /* wait_for_ready */); |
|
// Check that we created only one subchannel to the backend. |
|
EXPECT_EQ(1UL, servers_[0]->service_.clients().size()); |
|
// Clean up. |
|
EnableDefaultHealthCheckService(false); |
|
} |
|
|
|
TEST_F(RoundRobinTest, |
|
HealthCheckingServiceNameChangesAfterSubchannelsCreated) { |
|
EnableDefaultHealthCheckService(true); |
|
// Start server. |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
// Create a channel with health-checking enabled. |
|
const char* kServiceConfigJson = |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name\"}}"; |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("round_robin", response_generator); |
|
auto stub = BuildStub(channel); |
|
std::vector<int> ports = GetServersPorts(); |
|
response_generator.SetNextResolution(ports, kServiceConfigJson); |
|
servers_[0]->SetServingStatus("health_check_service_name", true); |
|
EXPECT_TRUE(WaitForChannelReady(channel.get(), 1 /* timeout_seconds */)); |
|
// Send an update on the channel to change it to use a health checking |
|
// service name that is not being reported as healthy. |
|
const char* kServiceConfigJson2 = |
|
"{\"healthCheckConfig\": " |
|
"{\"serviceName\": \"health_check_service_name2\"}}"; |
|
response_generator.SetNextResolution(ports, kServiceConfigJson2); |
|
EXPECT_TRUE(WaitForChannelNotReady(channel.get())); |
|
// Clean up. |
|
EnableDefaultHealthCheckService(false); |
|
} |
|
|
|
// |
|
// LB policy pick args |
|
// |
|
|
|
class ClientLbPickArgsTest : public ClientLbEnd2endTest { |
|
protected: |
|
void SetUp() override { |
|
ClientLbEnd2endTest::SetUp(); |
|
current_test_instance_ = this; |
|
} |
|
|
|
static void SetUpTestCase() { |
|
grpc_core::CoreConfiguration::Reset(); |
|
grpc_core::CoreConfiguration::RegisterBuilder( |
|
[](grpc_core::CoreConfiguration::Builder* builder) { |
|
grpc_core::RegisterTestPickArgsLoadBalancingPolicy(builder, |
|
SavePickArgs); |
|
}); |
|
grpc_init(); |
|
} |
|
|
|
static void TearDownTestCase() { |
|
grpc_shutdown(); |
|
grpc_core::CoreConfiguration::Reset(); |
|
} |
|
|
|
std::vector<grpc_core::PickArgsSeen> args_seen_list() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return args_seen_list_; |
|
} |
|
|
|
static std::string ArgsSeenListString( |
|
const std::vector<grpc_core::PickArgsSeen>& args_seen_list) { |
|
std::vector<std::string> entries; |
|
for (const auto& args_seen : args_seen_list) { |
|
std::vector<std::string> metadata; |
|
for (const auto& p : args_seen.metadata) { |
|
metadata.push_back(absl::StrCat(p.first, "=", p.second)); |
|
} |
|
entries.push_back(absl::StrFormat("{path=\"%s\", metadata=[%s]}", |
|
args_seen.path, |
|
absl::StrJoin(metadata, ", "))); |
|
} |
|
return absl::StrCat("[", absl::StrJoin(entries, ", "), "]"); |
|
} |
|
|
|
private: |
|
static void SavePickArgs(const grpc_core::PickArgsSeen& args_seen) { |
|
ClientLbPickArgsTest* self = current_test_instance_; |
|
grpc_core::MutexLock lock(&self->mu_); |
|
self->args_seen_list_.emplace_back(args_seen); |
|
} |
|
|
|
static ClientLbPickArgsTest* current_test_instance_; |
|
grpc_core::Mutex mu_; |
|
std::vector<grpc_core::PickArgsSeen> args_seen_list_; |
|
}; |
|
|
|
ClientLbPickArgsTest* ClientLbPickArgsTest::current_test_instance_ = nullptr; |
|
|
|
TEST_F(ClientLbPickArgsTest, Basic) { |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("test_pick_args_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Proactively connect the channel, so that the LB policy will always |
|
// be connected before it sees the pick. Otherwise, the test would be |
|
// flaky because sometimes the pick would be seen twice (once in |
|
// CONNECTING and again in READY) and other times only once (in READY). |
|
ASSERT_TRUE(channel->WaitForConnected(gpr_inf_future(GPR_CLOCK_MONOTONIC))); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("test_pick_args_lb", channel->GetLoadBalancingPolicyName()); |
|
// Now send an RPC and check that the picker sees the expected data. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub, /*wait_for_ready=*/true); |
|
auto pick_args_seen_list = args_seen_list(); |
|
EXPECT_THAT(pick_args_seen_list, |
|
::testing::ElementsAre(::testing::AllOf( |
|
::testing::Field(&grpc_core::PickArgsSeen::path, |
|
"/grpc.testing.EchoTestService/Echo"), |
|
::testing::Field(&grpc_core::PickArgsSeen::metadata, |
|
::testing::UnorderedElementsAre( |
|
::testing::Pair("foo", "1"), |
|
::testing::Pair("bar", "2"), |
|
::testing::Pair("baz", "3")))))) |
|
<< ArgsSeenListString(pick_args_seen_list); |
|
} |
|
|
|
// |
|
// tests that LB policies can get the call's trailing metadata |
|
// |
|
|
|
xds::data::orca::v3::OrcaLoadReport BackendMetricDataToOrcaLoadReport( |
|
const grpc_core::BackendMetricData& backend_metric_data) { |
|
xds::data::orca::v3::OrcaLoadReport load_report; |
|
load_report.set_cpu_utilization(backend_metric_data.cpu_utilization); |
|
load_report.set_mem_utilization(backend_metric_data.mem_utilization); |
|
for (const auto& p : backend_metric_data.request_cost) { |
|
std::string name(p.first); |
|
(*load_report.mutable_request_cost())[name] = p.second; |
|
} |
|
for (const auto& p : backend_metric_data.utilization) { |
|
std::string name(p.first); |
|
(*load_report.mutable_utilization())[name] = p.second; |
|
} |
|
return load_report; |
|
} |
|
|
|
class ClientLbInterceptTrailingMetadataTest : public ClientLbEnd2endTest { |
|
protected: |
|
void SetUp() override { |
|
ClientLbEnd2endTest::SetUp(); |
|
current_test_instance_ = this; |
|
} |
|
|
|
static void SetUpTestCase() { |
|
grpc_core::CoreConfiguration::Reset(); |
|
grpc_core::CoreConfiguration::RegisterBuilder( |
|
[](grpc_core::CoreConfiguration::Builder* builder) { |
|
grpc_core::RegisterInterceptRecvTrailingMetadataLoadBalancingPolicy( |
|
builder, ReportTrailerIntercepted); |
|
}); |
|
grpc_init(); |
|
} |
|
|
|
static void TearDownTestCase() { |
|
grpc_shutdown(); |
|
grpc_core::CoreConfiguration::Reset(); |
|
} |
|
|
|
int num_trailers_intercepted() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return num_trailers_intercepted_; |
|
} |
|
|
|
absl::Status last_status() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return last_status_; |
|
} |
|
|
|
grpc_core::MetadataVector trailing_metadata() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return std::move(trailing_metadata_); |
|
} |
|
|
|
absl::optional<xds::data::orca::v3::OrcaLoadReport> backend_load_report() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return std::move(load_report_); |
|
} |
|
|
|
// Returns true if received callback within deadline. |
|
bool WaitForLbCallback() { |
|
grpc_core::MutexLock lock(&mu_); |
|
while (!trailer_intercepted_) { |
|
if (cond_.WaitWithTimeout(&mu_, absl::Seconds(3))) return false; |
|
} |
|
trailer_intercepted_ = false; |
|
return true; |
|
} |
|
|
|
private: |
|
static void ReportTrailerIntercepted( |
|
const grpc_core::TrailingMetadataArgsSeen& args_seen) { |
|
const auto* backend_metric_data = args_seen.backend_metric_data; |
|
ClientLbInterceptTrailingMetadataTest* self = current_test_instance_; |
|
grpc_core::MutexLock lock(&self->mu_); |
|
self->last_status_ = args_seen.status; |
|
self->num_trailers_intercepted_++; |
|
self->trailer_intercepted_ = true; |
|
self->trailing_metadata_ = args_seen.metadata; |
|
if (backend_metric_data != nullptr) { |
|
self->load_report_ = |
|
BackendMetricDataToOrcaLoadReport(*backend_metric_data); |
|
} |
|
self->cond_.Signal(); |
|
} |
|
|
|
static ClientLbInterceptTrailingMetadataTest* current_test_instance_; |
|
int num_trailers_intercepted_ = 0; |
|
bool trailer_intercepted_ = false; |
|
grpc_core::Mutex mu_; |
|
grpc_core::CondVar cond_; |
|
absl::Status last_status_; |
|
grpc_core::MetadataVector trailing_metadata_; |
|
absl::optional<xds::data::orca::v3::OrcaLoadReport> load_report_; |
|
}; |
|
|
|
ClientLbInterceptTrailingMetadataTest* |
|
ClientLbInterceptTrailingMetadataTest::current_test_instance_ = nullptr; |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, StatusOk) { |
|
StartServers(1); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("intercept_trailing_metadata_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Send an OK RPC. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("intercept_trailing_metadata_lb", |
|
channel->GetLoadBalancingPolicyName()); |
|
EXPECT_EQ(1, num_trailers_intercepted()); |
|
EXPECT_EQ(absl::OkStatus(), last_status()); |
|
} |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, StatusFailed) { |
|
StartServers(1); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("intercept_trailing_metadata_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
EchoRequest request; |
|
auto* expected_error = request.mutable_param()->mutable_expected_error(); |
|
expected_error->set_code(GRPC_STATUS_PERMISSION_DENIED); |
|
expected_error->set_error_message("bummer, man"); |
|
Status status = SendRpc(stub, /*response=*/nullptr, /*timeout_ms=*/1000, |
|
/*wait_for_ready=*/false, &request); |
|
EXPECT_EQ(status.error_code(), StatusCode::PERMISSION_DENIED); |
|
EXPECT_EQ(status.error_message(), "bummer, man"); |
|
absl::Status status_seen_by_lb = last_status(); |
|
EXPECT_EQ(status_seen_by_lb.code(), absl::StatusCode::kPermissionDenied); |
|
EXPECT_EQ(status_seen_by_lb.message(), "bummer, man"); |
|
} |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, |
|
StatusCancelledWithoutStartingRecvTrailingMetadata) { |
|
StartServers(1); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("intercept_trailing_metadata_lb", response_generator); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
auto stub = BuildStub(channel); |
|
{ |
|
// Start a stream (sends initial metadata) and then cancel without |
|
// calling Finish(). |
|
ClientContext ctx; |
|
auto stream = stub->BidiStream(&ctx); |
|
ctx.TryCancel(); |
|
} |
|
// Wait for stream to be cancelled. |
|
ASSERT_TRUE(WaitForLbCallback()); |
|
// Check status seen by LB policy. |
|
EXPECT_EQ(1, num_trailers_intercepted()); |
|
absl::Status status_seen_by_lb = last_status(); |
|
EXPECT_EQ(status_seen_by_lb.code(), absl::StatusCode::kCancelled); |
|
EXPECT_EQ(status_seen_by_lb.message(), "call cancelled"); |
|
} |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, InterceptsRetriesDisabled) { |
|
const int kNumServers = 1; |
|
const int kNumRpcs = 10; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
ChannelArguments channel_args; |
|
channel_args.SetInt(GRPC_ARG_ENABLE_RETRIES, 0); |
|
auto channel = BuildChannel("intercept_trailing_metadata_lb", |
|
response_generator, channel_args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
for (size_t i = 0; i < kNumRpcs; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("intercept_trailing_metadata_lb", |
|
channel->GetLoadBalancingPolicyName()); |
|
EXPECT_EQ(kNumRpcs, num_trailers_intercepted()); |
|
EXPECT_THAT(trailing_metadata(), |
|
::testing::UnorderedElementsAre( |
|
// TODO(roth): Should grpc-status be visible here? |
|
::testing::Pair("grpc-status", "0"), |
|
::testing::Pair("user-agent", ::testing::_), |
|
::testing::Pair("foo", "1"), ::testing::Pair("bar", "2"), |
|
::testing::Pair("baz", "3"))); |
|
EXPECT_FALSE(backend_load_report().has_value()); |
|
} |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, InterceptsRetriesEnabled) { |
|
const int kNumServers = 1; |
|
const int kNumRpcs = 10; |
|
StartServers(kNumServers); |
|
ChannelArguments args; |
|
args.SetServiceConfigJSON( |
|
"{\n" |
|
" \"methodConfig\": [ {\n" |
|
" \"name\": [\n" |
|
" { \"service\": \"grpc.testing.EchoTestService\" }\n" |
|
" ],\n" |
|
" \"retryPolicy\": {\n" |
|
" \"maxAttempts\": 3,\n" |
|
" \"initialBackoff\": \"1s\",\n" |
|
" \"maxBackoff\": \"120s\",\n" |
|
" \"backoffMultiplier\": 1.6,\n" |
|
" \"retryableStatusCodes\": [ \"ABORTED\" ]\n" |
|
" }\n" |
|
" } ]\n" |
|
"}"); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("intercept_trailing_metadata_lb", response_generator, args); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
for (size_t i = 0; i < kNumRpcs; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
} |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("intercept_trailing_metadata_lb", |
|
channel->GetLoadBalancingPolicyName()); |
|
EXPECT_EQ(kNumRpcs, num_trailers_intercepted()); |
|
EXPECT_THAT(trailing_metadata(), |
|
::testing::UnorderedElementsAre( |
|
// TODO(roth): Should grpc-status be visible here? |
|
::testing::Pair("grpc-status", "0"), |
|
::testing::Pair("user-agent", ::testing::_), |
|
::testing::Pair("foo", "1"), ::testing::Pair("bar", "2"), |
|
::testing::Pair("baz", "3"))); |
|
EXPECT_FALSE(backend_load_report().has_value()); |
|
} |
|
|
|
TEST_F(ClientLbInterceptTrailingMetadataTest, BackendMetricData) { |
|
const int kNumServers = 1; |
|
const int kNumRpcs = 10; |
|
StartServers(kNumServers); |
|
xds::data::orca::v3::OrcaLoadReport load_report; |
|
load_report.set_cpu_utilization(0.5); |
|
load_report.set_mem_utilization(0.75); |
|
auto* request_cost = load_report.mutable_request_cost(); |
|
(*request_cost)["foo"] = 0.8; |
|
(*request_cost)["bar"] = 1.4; |
|
auto* utilization = load_report.mutable_utilization(); |
|
(*utilization)["baz"] = 1.1; |
|
(*utilization)["quux"] = 0.9; |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = |
|
BuildChannel("intercept_trailing_metadata_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
for (size_t i = 0; i < kNumRpcs; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, stub, false, &load_report); |
|
auto actual = backend_load_report(); |
|
ASSERT_TRUE(actual.has_value()); |
|
// TODO(roth): Change this to use EqualsProto() once that becomes |
|
// available in OSS. |
|
EXPECT_EQ(actual->cpu_utilization(), load_report.cpu_utilization()); |
|
EXPECT_EQ(actual->mem_utilization(), load_report.mem_utilization()); |
|
EXPECT_EQ(actual->request_cost().size(), load_report.request_cost().size()); |
|
for (const auto& p : actual->request_cost()) { |
|
auto it = load_report.request_cost().find(p.first); |
|
ASSERT_NE(it, load_report.request_cost().end()); |
|
EXPECT_EQ(it->second, p.second); |
|
} |
|
EXPECT_EQ(actual->utilization().size(), load_report.utilization().size()); |
|
for (const auto& p : actual->utilization()) { |
|
auto it = load_report.utilization().find(p.first); |
|
ASSERT_NE(it, load_report.utilization().end()); |
|
EXPECT_EQ(it->second, p.second); |
|
} |
|
} |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("intercept_trailing_metadata_lb", |
|
channel->GetLoadBalancingPolicyName()); |
|
EXPECT_EQ(kNumRpcs, num_trailers_intercepted()); |
|
} |
|
|
|
// |
|
// tests that address attributes from the resolver are visible to the LB policy |
|
// |
|
|
|
class ClientLbAddressTest : public ClientLbEnd2endTest { |
|
protected: |
|
static const char* kAttributeKey; |
|
|
|
class Attribute : public grpc_core::ServerAddress::AttributeInterface { |
|
public: |
|
explicit Attribute(const std::string& str) : str_(str) {} |
|
|
|
std::unique_ptr<AttributeInterface> Copy() const override { |
|
return absl::make_unique<Attribute>(str_); |
|
} |
|
|
|
int Cmp(const AttributeInterface* other) const override { |
|
return str_.compare(static_cast<const Attribute*>(other)->str_); |
|
} |
|
|
|
std::string ToString() const override { return str_; } |
|
|
|
private: |
|
std::string str_; |
|
}; |
|
|
|
void SetUp() override { |
|
ClientLbEnd2endTest::SetUp(); |
|
current_test_instance_ = this; |
|
} |
|
|
|
static void SetUpTestCase() { |
|
grpc_core::CoreConfiguration::Reset(); |
|
grpc_core::CoreConfiguration::RegisterBuilder( |
|
[](grpc_core::CoreConfiguration::Builder* builder) { |
|
grpc_core::RegisterAddressTestLoadBalancingPolicy(builder, |
|
SaveAddress); |
|
}); |
|
grpc_init(); |
|
} |
|
|
|
static void TearDownTestCase() { |
|
grpc_shutdown(); |
|
grpc_core::CoreConfiguration::Reset(); |
|
} |
|
|
|
const std::vector<std::string>& addresses_seen() { |
|
grpc_core::MutexLock lock(&mu_); |
|
return addresses_seen_; |
|
} |
|
|
|
private: |
|
static void SaveAddress(const grpc_core::ServerAddress& address) { |
|
ClientLbAddressTest* self = current_test_instance_; |
|
grpc_core::MutexLock lock(&self->mu_); |
|
self->addresses_seen_.emplace_back(address.ToString()); |
|
} |
|
|
|
static ClientLbAddressTest* current_test_instance_; |
|
grpc_core::Mutex mu_; |
|
std::vector<std::string> addresses_seen_; |
|
}; |
|
|
|
const char* ClientLbAddressTest::kAttributeKey = "attribute_key"; |
|
|
|
ClientLbAddressTest* ClientLbAddressTest::current_test_instance_ = nullptr; |
|
|
|
TEST_F(ClientLbAddressTest, Basic) { |
|
const int kNumServers = 1; |
|
StartServers(kNumServers); |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("address_test_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
// Addresses returned by the resolver will have attached attributes. |
|
response_generator.SetNextResolution(GetServersPorts(), nullptr, |
|
kAttributeKey, |
|
absl::make_unique<Attribute>("foo")); |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("address_test_lb", channel->GetLoadBalancingPolicyName()); |
|
// Make sure that the attributes wind up on the subchannels. |
|
std::vector<std::string> expected; |
|
for (const int port : GetServersPorts()) { |
|
expected.emplace_back( |
|
absl::StrCat(ipv6_only_ ? "[::1]:" : "127.0.0.1:", port, |
|
" attributes={", kAttributeKey, "=foo}")); |
|
} |
|
EXPECT_EQ(addresses_seen(), expected); |
|
} |
|
|
|
// |
|
// tests OOB backend metric API |
|
// |
|
|
|
class OobBackendMetricTest : public ClientLbEnd2endTest { |
|
protected: |
|
using BackendMetricReport = |
|
std::pair<int /*port*/, xds::data::orca::v3::OrcaLoadReport>; |
|
|
|
void SetUp() override { |
|
ClientLbEnd2endTest::SetUp(); |
|
current_test_instance_ = this; |
|
} |
|
|
|
static void SetUpTestCase() { |
|
grpc_core::CoreConfiguration::Reset(); |
|
grpc_core::CoreConfiguration::RegisterBuilder( |
|
[](grpc_core::CoreConfiguration::Builder* builder) { |
|
grpc_core::RegisterOobBackendMetricTestLoadBalancingPolicy( |
|
builder, BackendMetricCallback); |
|
}); |
|
grpc_init(); |
|
} |
|
|
|
static void TearDownTestCase() { |
|
grpc_shutdown(); |
|
grpc_core::CoreConfiguration::Reset(); |
|
} |
|
|
|
absl::optional<BackendMetricReport> GetBackendMetricReport() { |
|
grpc_core::MutexLock lock(&mu_); |
|
if (backend_metric_reports_.empty()) return absl::nullopt; |
|
auto result = std::move(backend_metric_reports_.front()); |
|
backend_metric_reports_.pop_front(); |
|
return result; |
|
} |
|
|
|
private: |
|
static void BackendMetricCallback( |
|
grpc_core::ServerAddress address, |
|
const grpc_core::BackendMetricData& backend_metric_data) { |
|
auto load_report = BackendMetricDataToOrcaLoadReport(backend_metric_data); |
|
int port = grpc_sockaddr_get_port(&address.address()); |
|
grpc_core::MutexLock lock(¤t_test_instance_->mu_); |
|
current_test_instance_->backend_metric_reports_.push_back( |
|
{port, std::move(load_report)}); |
|
} |
|
|
|
static OobBackendMetricTest* current_test_instance_; |
|
grpc_core::Mutex mu_; |
|
std::deque<BackendMetricReport> backend_metric_reports_ ABSL_GUARDED_BY(&mu_); |
|
}; |
|
|
|
OobBackendMetricTest* OobBackendMetricTest::current_test_instance_ = nullptr; |
|
|
|
TEST_F(OobBackendMetricTest, Basic) { |
|
StartServers(1); |
|
// Set initial backend metric data on server. |
|
constexpr char kMetricName[] = "foo"; |
|
servers_[0]->orca_service_.SetCpuUtilization(0.1); |
|
servers_[0]->orca_service_.SetMemoryUtilization(0.2); |
|
servers_[0]->orca_service_.SetNamedUtilization(kMetricName, 0.3); |
|
// Start client. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("oob_backend_metric_test_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Send an OK RPC. |
|
CheckRpcSendOk(DEBUG_LOCATION, stub); |
|
// Check LB policy name for the channel. |
|
EXPECT_EQ("oob_backend_metric_test_lb", |
|
channel->GetLoadBalancingPolicyName()); |
|
// Check report seen by client. |
|
for (size_t i = 0; i < 5; ++i) { |
|
auto report = GetBackendMetricReport(); |
|
if (report.has_value()) { |
|
EXPECT_EQ(report->first, servers_[0]->port_); |
|
EXPECT_EQ(report->second.cpu_utilization(), 0.1); |
|
EXPECT_EQ(report->second.mem_utilization(), 0.2); |
|
EXPECT_THAT( |
|
report->second.utilization(), |
|
::testing::UnorderedElementsAre(::testing::Pair(kMetricName, 0.3))); |
|
break; |
|
} |
|
gpr_sleep_until(grpc_timeout_seconds_to_deadline(1)); |
|
} |
|
// Now update the utilization data on the server. |
|
// Note that the server may send a new report while we're updating these, |
|
// so we set them in reverse order, so that we know we'll get all new |
|
// data once we see a report with the new CPU utilization value. |
|
servers_[0]->orca_service_.SetNamedUtilization(kMetricName, 0.6); |
|
servers_[0]->orca_service_.SetMemoryUtilization(0.5); |
|
servers_[0]->orca_service_.SetCpuUtilization(0.4); |
|
// Wait for client to see new report. |
|
for (size_t i = 0; i < 5; ++i) { |
|
auto report = GetBackendMetricReport(); |
|
if (report.has_value()) { |
|
EXPECT_EQ(report->first, servers_[0]->port_); |
|
if (report->second.cpu_utilization() != 0.1) { |
|
EXPECT_EQ(report->second.cpu_utilization(), 0.4); |
|
EXPECT_EQ(report->second.mem_utilization(), 0.5); |
|
EXPECT_THAT( |
|
report->second.utilization(), |
|
::testing::UnorderedElementsAre(::testing::Pair(kMetricName, 0.6))); |
|
break; |
|
} |
|
} |
|
gpr_sleep_until(grpc_timeout_seconds_to_deadline(1)); |
|
} |
|
} |
|
|
|
// |
|
// tests rewriting of control plane status codes |
|
// |
|
|
|
class ControlPlaneStatusRewritingTest : public ClientLbEnd2endTest { |
|
protected: |
|
static void SetUpTestCase() { |
|
grpc_core::CoreConfiguration::Reset(); |
|
grpc_core::CoreConfiguration::RegisterBuilder( |
|
[](grpc_core::CoreConfiguration::Builder* builder) { |
|
grpc_core::RegisterFailLoadBalancingPolicy( |
|
builder, absl::AbortedError("nope")); |
|
}); |
|
grpc_init(); |
|
} |
|
|
|
static void TearDownTestCase() { |
|
grpc_shutdown(); |
|
grpc_core::CoreConfiguration::Reset(); |
|
} |
|
}; |
|
|
|
TEST_F(ControlPlaneStatusRewritingTest, RewritesFromLb) { |
|
// Start client. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("fail_lb", response_generator); |
|
auto stub = BuildStub(channel); |
|
response_generator.SetNextResolution(GetServersPorts()); |
|
// Send an RPC, verify that status was rewritten. |
|
CheckRpcSendFailure( |
|
DEBUG_LOCATION, stub, StatusCode::INTERNAL, |
|
"Illegal status code from LB pick; original status: ABORTED: nope"); |
|
} |
|
|
|
TEST_F(ControlPlaneStatusRewritingTest, RewritesFromResolver) { |
|
// Start client. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
grpc_core::Resolver::Result result; |
|
result.service_config = absl::AbortedError("nope"); |
|
result.addresses.emplace(); |
|
response_generator.SetResponse(std::move(result)); |
|
// Send an RPC, verify that status was rewritten. |
|
CheckRpcSendFailure( |
|
DEBUG_LOCATION, stub, StatusCode::INTERNAL, |
|
"Illegal status code from resolver; original status: ABORTED: nope"); |
|
} |
|
|
|
TEST_F(ControlPlaneStatusRewritingTest, RewritesFromConfigSelector) { |
|
class FailConfigSelector : public grpc_core::ConfigSelector { |
|
public: |
|
explicit FailConfigSelector(absl::Status status) |
|
: status_(std::move(status)) {} |
|
const char* name() const override { return "FailConfigSelector"; } |
|
bool Equals(const ConfigSelector* other) const override { |
|
return status_ == static_cast<const FailConfigSelector*>(other)->status_; |
|
} |
|
CallConfig GetCallConfig(GetCallConfigArgs /*args*/) override { |
|
CallConfig config; |
|
config.status = status_; |
|
return config; |
|
} |
|
|
|
private: |
|
absl::Status status_; |
|
}; |
|
// Start client. |
|
auto response_generator = BuildResolverResponseGenerator(); |
|
auto channel = BuildChannel("pick_first", response_generator); |
|
auto stub = BuildStub(channel); |
|
auto config_selector = |
|
grpc_core::MakeRefCounted<FailConfigSelector>(absl::AbortedError("nope")); |
|
grpc_core::Resolver::Result result; |
|
result.addresses.emplace(); |
|
result.service_config = |
|
grpc_core::ServiceConfigImpl::Create(grpc_core::ChannelArgs(), "{}"); |
|
ASSERT_TRUE(result.service_config.ok()) << result.service_config.status(); |
|
result.args = grpc_core::ChannelArgs().SetObject(config_selector); |
|
response_generator.SetResponse(std::move(result)); |
|
// Send an RPC, verify that status was rewritten. |
|
CheckRpcSendFailure( |
|
DEBUG_LOCATION, stub, StatusCode::INTERNAL, |
|
"Illegal status code from ConfigSelector; original status: " |
|
"ABORTED: nope"); |
|
} |
|
|
|
} // namespace |
|
} // namespace testing |
|
} // namespace grpc |
|
|
|
int main(int argc, char** argv) { |
|
::testing::InitGoogleTest(&argc, argv); |
|
grpc::testing::TestEnvironment env(&argc, argv); |
|
grpc_init(); |
|
grpc::testing::ConnectionAttemptInjector::Init(); |
|
const auto result = RUN_ALL_TESTS(); |
|
grpc_shutdown(); |
|
return result; |
|
}
|
|
|