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/*
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*
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* Copyright 2017 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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*
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*/
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#include <memory>
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#include <mutex>
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#include <set>
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#include <sstream>
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#include <thread>
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#include <grpc/grpc.h>
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#include <grpc/support/alloc.h>
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#include <grpc/support/log.h>
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#include <grpc/support/string_util.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/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/parse_address.h"
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#include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h"
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#include "src/core/ext/filters/client_channel/server_address.h"
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#include "src/core/ext/filters/client_channel/service_config.h"
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#include "src/core/lib/gprpp/ref_counted_ptr.h"
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#include "src/core/lib/iomgr/sockaddr.h"
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#include "src/core/lib/security/credentials/fake/fake_credentials.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 "test/core/util/port.h"
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#include "test/core/util/test_config.h"
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#include "test/cpp/end2end/test_service_impl.h"
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#include "src/proto/grpc/lb/v1/load_balancer.grpc.pb.h"
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#include "src/proto/grpc/testing/echo.grpc.pb.h"
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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// TODO(dgq): Other scenarios in need of testing:
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// - Send a serverlist with faulty ip:port addresses (port > 2^16, etc).
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// - Test reception of invalid serverlist
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// - Test against a non-LB server.
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// - Random LB server closing the stream unexpectedly.
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//
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// Findings from end to end testing to be covered here:
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// - Handling of LB servers restart, including reconnection after backing-off
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// retries.
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// - Destruction of load balanced channel (and therefore of grpclb instance)
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// while:
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// 1) the internal LB call is still active. This should work by virtue
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// of the weak reference the LB call holds. The call should be terminated as
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// part of the grpclb shutdown process.
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// 2) the retry timer is active. Again, the weak reference it holds should
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// prevent a premature call to \a glb_destroy.
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using std::chrono::system_clock;
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using grpc::lb::v1::LoadBalanceRequest;
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using grpc::lb::v1::LoadBalanceResponse;
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using grpc::lb::v1::LoadBalancer;
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namespace grpc {
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namespace testing {
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namespace {
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template <typename ServiceType>
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class CountedService : public ServiceType {
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public:
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size_t request_count() {
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grpc::internal::MutexLock lock(&mu_);
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return request_count_;
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}
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size_t response_count() {
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grpc::internal::MutexLock lock(&mu_);
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return response_count_;
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}
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void IncreaseResponseCount() {
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grpc::internal::MutexLock lock(&mu_);
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++response_count_;
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}
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void IncreaseRequestCount() {
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grpc::internal::MutexLock lock(&mu_);
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++request_count_;
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}
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void ResetCounters() {
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grpc::internal::MutexLock lock(&mu_);
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request_count_ = 0;
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response_count_ = 0;
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}
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protected:
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grpc::internal::Mutex mu_;
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private:
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size_t request_count_ = 0;
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size_t response_count_ = 0;
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};
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using BackendService = CountedService<TestServiceImpl>;
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using BalancerService = CountedService<LoadBalancer::Service>;
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const char g_kCallCredsMdKey[] = "Balancer should not ...";
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const char g_kCallCredsMdValue[] = "... receive me";
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class BackendServiceImpl : public BackendService {
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public:
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BackendServiceImpl() {}
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Status Echo(ServerContext* context, const EchoRequest* request,
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EchoResponse* response) override {
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// Backend should receive the call credentials metadata.
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auto call_credentials_entry =
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context->client_metadata().find(g_kCallCredsMdKey);
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EXPECT_NE(call_credentials_entry, context->client_metadata().end());
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if (call_credentials_entry != context->client_metadata().end()) {
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EXPECT_EQ(call_credentials_entry->second, g_kCallCredsMdValue);
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}
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IncreaseRequestCount();
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const auto status = TestServiceImpl::Echo(context, request, response);
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IncreaseResponseCount();
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AddClient(context->peer());
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return status;
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}
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void Start() {}
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void Shutdown() {}
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std::set<grpc::string> clients() {
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grpc::internal::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 grpc::string& client) {
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grpc::internal::MutexLock lock(&clients_mu_);
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clients_.insert(client);
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}
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grpc::internal::Mutex mu_;
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grpc::internal::Mutex clients_mu_;
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std::set<grpc::string> clients_;
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};
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grpc::string Ip4ToPackedString(const char* ip_str) {
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struct in_addr ip4;
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GPR_ASSERT(inet_pton(AF_INET, ip_str, &ip4) == 1);
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return grpc::string(reinterpret_cast<const char*>(&ip4), sizeof(ip4));
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}
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struct ClientStats {
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size_t num_calls_started = 0;
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size_t num_calls_finished = 0;
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size_t num_calls_finished_with_client_failed_to_send = 0;
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size_t num_calls_finished_known_received = 0;
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std::map<grpc::string, size_t> drop_token_counts;
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ClientStats& operator+=(const ClientStats& other) {
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num_calls_started += other.num_calls_started;
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num_calls_finished += other.num_calls_finished;
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num_calls_finished_with_client_failed_to_send +=
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other.num_calls_finished_with_client_failed_to_send;
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num_calls_finished_known_received +=
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other.num_calls_finished_known_received;
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for (const auto& p : other.drop_token_counts) {
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drop_token_counts[p.first] += p.second;
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}
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return *this;
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}
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void Reset() {
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num_calls_started = 0;
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num_calls_finished = 0;
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num_calls_finished_with_client_failed_to_send = 0;
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num_calls_finished_known_received = 0;
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drop_token_counts.clear();
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}
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};
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class BalancerServiceImpl : public BalancerService {
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public:
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using Stream = ServerReaderWriter<LoadBalanceResponse, LoadBalanceRequest>;
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using ResponseDelayPair = std::pair<LoadBalanceResponse, int>;
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explicit BalancerServiceImpl(int client_load_reporting_interval_seconds)
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: client_load_reporting_interval_seconds_(
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client_load_reporting_interval_seconds) {}
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Status BalanceLoad(ServerContext* context, Stream* stream) override {
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gpr_log(GPR_INFO, "LB[%p]: BalanceLoad", this);
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{
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grpc::internal::MutexLock lock(&mu_);
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if (serverlist_done_) goto done;
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}
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{
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// Balancer shouldn't receive the call credentials metadata.
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EXPECT_EQ(context->client_metadata().find(g_kCallCredsMdKey),
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context->client_metadata().end());
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LoadBalanceRequest request;
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std::vector<ResponseDelayPair> responses_and_delays;
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if (!stream->Read(&request)) {
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goto done;
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}
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IncreaseRequestCount();
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gpr_log(GPR_INFO, "LB[%p]: received initial message '%s'", this,
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request.DebugString().c_str());
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// TODO(juanlishen): Initial response should always be the first response.
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if (client_load_reporting_interval_seconds_ > 0) {
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LoadBalanceResponse initial_response;
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initial_response.mutable_initial_response()
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->mutable_client_stats_report_interval()
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->set_seconds(client_load_reporting_interval_seconds_);
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stream->Write(initial_response);
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}
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{
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grpc::internal::MutexLock lock(&mu_);
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responses_and_delays = responses_and_delays_;
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}
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for (const auto& response_and_delay : responses_and_delays) {
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SendResponse(stream, response_and_delay.first,
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response_and_delay.second);
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}
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{
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grpc::internal::MutexLock lock(&mu_);
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serverlist_cond_.WaitUntil(&mu_, [this] { return serverlist_done_; });
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}
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if (client_load_reporting_interval_seconds_ > 0) {
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request.Clear();
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if (stream->Read(&request)) {
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gpr_log(GPR_INFO, "LB[%p]: received client load report message '%s'",
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this, request.DebugString().c_str());
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GPR_ASSERT(request.has_client_stats());
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// We need to acquire the lock here in order to prevent the notify_one
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// below from firing before its corresponding wait is executed.
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grpc::internal::MutexLock lock(&mu_);
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client_stats_.num_calls_started +=
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request.client_stats().num_calls_started();
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client_stats_.num_calls_finished +=
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request.client_stats().num_calls_finished();
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client_stats_.num_calls_finished_with_client_failed_to_send +=
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request.client_stats()
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.num_calls_finished_with_client_failed_to_send();
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client_stats_.num_calls_finished_known_received +=
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request.client_stats().num_calls_finished_known_received();
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for (const auto& drop_token_count :
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request.client_stats().calls_finished_with_drop()) {
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client_stats_
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.drop_token_counts[drop_token_count.load_balance_token()] +=
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drop_token_count.num_calls();
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}
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load_report_ready_ = true;
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load_report_cond_.Signal();
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}
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}
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}
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done:
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gpr_log(GPR_INFO, "LB[%p]: done", this);
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return Status::OK;
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}
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void add_response(const LoadBalanceResponse& response, int send_after_ms) {
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grpc::internal::MutexLock lock(&mu_);
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responses_and_delays_.push_back(std::make_pair(response, send_after_ms));
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}
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void Start() {
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grpc::internal::MutexLock lock(&mu_);
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serverlist_done_ = false;
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load_report_ready_ = false;
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responses_and_delays_.clear();
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client_stats_.Reset();
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}
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void Shutdown() {
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NotifyDoneWithServerlists();
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gpr_log(GPR_INFO, "LB[%p]: shut down", this);
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}
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static LoadBalanceResponse BuildResponseForBackends(
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const std::vector<int>& backend_ports,
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const std::map<grpc::string, size_t>& drop_token_counts) {
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LoadBalanceResponse response;
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for (const auto& drop_token_count : drop_token_counts) {
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for (size_t i = 0; i < drop_token_count.second; ++i) {
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auto* server = response.mutable_server_list()->add_servers();
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server->set_drop(true);
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server->set_load_balance_token(drop_token_count.first);
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}
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}
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for (const int& backend_port : backend_ports) {
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auto* server = response.mutable_server_list()->add_servers();
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server->set_ip_address(Ip4ToPackedString("127.0.0.1"));
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server->set_port(backend_port);
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static int token_count = 0;
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char* token;
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gpr_asprintf(&token, "token%03d", ++token_count);
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server->set_load_balance_token(token);
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gpr_free(token);
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}
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return response;
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}
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const ClientStats& WaitForLoadReport() {
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grpc::internal::MutexLock lock(&mu_);
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load_report_cond_.WaitUntil(&mu_, [this] { return load_report_ready_; });
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load_report_ready_ = false;
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return client_stats_;
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}
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void NotifyDoneWithServerlists() {
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grpc::internal::MutexLock lock(&mu_);
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if (!serverlist_done_) {
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serverlist_done_ = true;
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serverlist_cond_.Broadcast();
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}
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}
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private:
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void SendResponse(Stream* stream, const LoadBalanceResponse& response,
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int delay_ms) {
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gpr_log(GPR_INFO, "LB[%p]: sleeping for %d ms...", this, delay_ms);
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if (delay_ms > 0) {
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gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(delay_ms));
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}
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gpr_log(GPR_INFO, "LB[%p]: Woke up! Sending response '%s'", this,
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response.DebugString().c_str());
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IncreaseResponseCount();
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stream->Write(response);
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}
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const int client_load_reporting_interval_seconds_;
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std::vector<ResponseDelayPair> responses_and_delays_;
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|
|
grpc::internal::Mutex mu_;
|
|
|
|
grpc::internal::CondVar load_report_cond_;
|
|
|
|
bool load_report_ready_ = false;
|
|
|
|
grpc::internal::CondVar serverlist_cond_;
|
|
|
|
bool serverlist_done_ = false;
|
|
|
|
ClientStats client_stats_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class GrpclbEnd2endTest : public ::testing::Test {
|
|
|
|
protected:
|
|
|
|
GrpclbEnd2endTest(size_t num_backends, size_t num_balancers,
|
|
|
|
int client_load_reporting_interval_seconds)
|
|
|
|
: server_host_("localhost"),
|
|
|
|
num_backends_(num_backends),
|
|
|
|
num_balancers_(num_balancers),
|
|
|
|
client_load_reporting_interval_seconds_(
|
|
|
|
client_load_reporting_interval_seconds) {}
|
|
|
|
|
|
|
|
static void SetUpTestCase() {
|
|
|
|
// Make the backup poller poll very frequently in order to pick up
|
|
|
|
// updates from all the subchannels's FDs.
|
|
|
|
GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1);
|
|
|
|
grpc_init();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void TearDownTestCase() { grpc_shutdown(); }
|
|
|
|
|
|
|
|
void SetUp() override {
|
|
|
|
response_generator_ =
|
|
|
|
grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
|
|
|
|
// Start the backends.
|
|
|
|
for (size_t i = 0; i < num_backends_; ++i) {
|
|
|
|
backends_.emplace_back(new ServerThread<BackendServiceImpl>("backend"));
|
|
|
|
backends_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
// Start the load balancers.
|
|
|
|
for (size_t i = 0; i < num_balancers_; ++i) {
|
|
|
|
balancers_.emplace_back(new ServerThread<BalancerServiceImpl>(
|
|
|
|
"balancer", client_load_reporting_interval_seconds_));
|
|
|
|
balancers_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
ResetStub();
|
|
|
|
}
|
|
|
|
|
|
|
|
void TearDown() override {
|
|
|
|
ShutdownAllBackends();
|
|
|
|
for (auto& balancer : balancers_) balancer->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Start(server_host_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartBackend(size_t index) { backends_[index]->Start(server_host_); }
|
|
|
|
|
|
|
|
void ShutdownAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void ShutdownBackend(size_t index) { backends_[index]->Shutdown(); }
|
|
|
|
|
|
|
|
void ResetStub(int fallback_timeout = 0,
|
|
|
|
const grpc::string& expected_targets = "") {
|
|
|
|
ChannelArguments args;
|
|
|
|
if (fallback_timeout > 0) args.SetGrpclbFallbackTimeout(fallback_timeout);
|
|
|
|
args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
|
|
|
|
response_generator_.get());
|
|
|
|
if (!expected_targets.empty()) {
|
|
|
|
args.SetString(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS, expected_targets);
|
|
|
|
}
|
|
|
|
std::ostringstream uri;
|
|
|
|
uri << "fake:///" << kApplicationTargetName_;
|
|
|
|
// TODO(dgq): templatize tests to run everything using both secure and
|
|
|
|
// insecure channel credentials.
|
|
|
|
grpc_channel_credentials* channel_creds =
|
|
|
|
grpc_fake_transport_security_credentials_create();
|
|
|
|
grpc_call_credentials* call_creds = grpc_md_only_test_credentials_create(
|
|
|
|
g_kCallCredsMdKey, g_kCallCredsMdValue, false);
|
|
|
|
std::shared_ptr<ChannelCredentials> creds(
|
|
|
|
new SecureChannelCredentials(grpc_composite_channel_credentials_create(
|
|
|
|
channel_creds, call_creds, nullptr)));
|
|
|
|
call_creds->Unref();
|
|
|
|
channel_creds->Unref();
|
|
|
|
channel_ = ::grpc::CreateCustomChannel(uri.str(), creds, args);
|
|
|
|
stub_ = grpc::testing::EchoTestService::NewStub(channel_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ResetBackendCounters() {
|
|
|
|
for (auto& backend : backends_) backend->service_.ResetCounters();
|
|
|
|
}
|
|
|
|
|
|
|
|
ClientStats WaitForLoadReports() {
|
|
|
|
ClientStats client_stats;
|
|
|
|
for (auto& balancer : balancers_) {
|
|
|
|
client_stats += balancer->service_.WaitForLoadReport();
|
|
|
|
}
|
|
|
|
return client_stats;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SeenAllBackends(size_t start_index = 0, size_t stop_index = 0) {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
for (size_t i = start_index; i < stop_index; ++i) {
|
|
|
|
if (backends_[i]->service_.request_count() == 0) return false;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void SendRpcAndCount(int* num_total, int* num_ok, int* num_failure,
|
|
|
|
int* num_drops) {
|
|
|
|
const Status status = SendRpc();
|
|
|
|
if (status.ok()) {
|
|
|
|
++*num_ok;
|
|
|
|
} else {
|
|
|
|
if (status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++*num_drops;
|
|
|
|
} else {
|
|
|
|
++*num_failure;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
++*num_total;
|
|
|
|
}
|
|
|
|
|
|
|
|
std::tuple<int, int, int> WaitForAllBackends(int num_requests_multiple_of = 1,
|
|
|
|
size_t start_index = 0,
|
|
|
|
size_t stop_index = 0) {
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
int num_total = 0;
|
|
|
|
while (!SeenAllBackends(start_index, stop_index)) {
|
|
|
|
SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops);
|
|
|
|
}
|
|
|
|
while (num_total % num_requests_multiple_of != 0) {
|
|
|
|
SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops);
|
|
|
|
}
|
|
|
|
ResetBackendCounters();
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"Performed %d warm up requests (a multiple of %d) against the "
|
|
|
|
"backends. %d succeeded, %d failed, %d dropped.",
|
|
|
|
num_total, num_requests_multiple_of, num_ok, num_failure,
|
|
|
|
num_drops);
|
|
|
|
return std::make_tuple(num_ok, num_failure, num_drops);
|
|
|
|
}
|
|
|
|
|
|
|
|
void WaitForBackend(size_t backend_idx) {
|
|
|
|
do {
|
|
|
|
(void)SendRpc();
|
|
|
|
} while (backends_[backend_idx]->service_.request_count() == 0);
|
|
|
|
ResetBackendCounters();
|
|
|
|
}
|
|
|
|
|
|
|
|
struct AddressData {
|
|
|
|
int port;
|
|
|
|
bool is_balancer;
|
|
|
|
grpc::string balancer_name;
|
|
|
|
};
|
|
|
|
|
|
|
|
grpc_core::ServerAddressList CreateLbAddressesFromAddressDataList(
|
|
|
|
const std::vector<AddressData>& address_data) {
|
|
|
|
grpc_core::ServerAddressList addresses;
|
|
|
|
for (const auto& addr : address_data) {
|
|
|
|
char* lb_uri_str;
|
|
|
|
gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", addr.port);
|
|
|
|
grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
|
|
|
|
GPR_ASSERT(lb_uri != nullptr);
|
|
|
|
grpc_resolved_address address;
|
|
|
|
GPR_ASSERT(grpc_parse_uri(lb_uri, &address));
|
|
|
|
std::vector<grpc_arg> args_to_add;
|
|
|
|
if (addr.is_balancer) {
|
|
|
|
args_to_add.emplace_back(grpc_channel_arg_integer_create(
|
|
|
|
const_cast<char*>(GRPC_ARG_ADDRESS_IS_BALANCER), 1));
|
|
|
|
args_to_add.emplace_back(grpc_channel_arg_string_create(
|
|
|
|
const_cast<char*>(GRPC_ARG_ADDRESS_BALANCER_NAME),
|
|
|
|
const_cast<char*>(addr.balancer_name.c_str())));
|
|
|
|
}
|
|
|
|
grpc_channel_args* args = grpc_channel_args_copy_and_add(
|
|
|
|
nullptr, args_to_add.data(), args_to_add.size());
|
|
|
|
addresses.emplace_back(address.addr, address.len, args);
|
|
|
|
grpc_uri_destroy(lb_uri);
|
|
|
|
gpr_free(lb_uri_str);
|
|
|
|
}
|
|
|
|
return addresses;
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolutionAllBalancers(
|
|
|
|
const char* service_config_json = nullptr) {
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
for (size_t i = 0; i < balancers_.size(); ++i) {
|
|
|
|
addresses.emplace_back(AddressData{balancers_[i]->port_, true, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses, service_config_json);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolution(const std::vector<AddressData>& address_data,
|
|
|
|
const char* service_config_json = nullptr) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateLbAddressesFromAddressDataList(address_data);
|
|
|
|
if (service_config_json != nullptr) {
|
|
|
|
grpc_error* error = GRPC_ERROR_NONE;
|
|
|
|
result.service_config =
|
|
|
|
grpc_core::ServiceConfig::Create(service_config_json, &error);
|
|
|
|
GRPC_ERROR_UNREF(error);
|
|
|
|
}
|
|
|
|
response_generator_->SetResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextReresolutionResponse(
|
|
|
|
const std::vector<AddressData>& address_data) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateLbAddressesFromAddressDataList(address_data);
|
|
|
|
response_generator_->SetReresolutionResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
const std::vector<int> GetBackendPorts(size_t start_index = 0,
|
|
|
|
size_t stop_index = 0) const {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
std::vector<int> backend_ports;
|
|
|
|
for (size_t i = start_index; i < stop_index; ++i) {
|
|
|
|
backend_ports.push_back(backends_[i]->port_);
|
|
|
|
}
|
|
|
|
return backend_ports;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ScheduleResponseForBalancer(size_t i,
|
|
|
|
const LoadBalanceResponse& response,
|
|
|
|
int delay_ms) {
|
|
|
|
balancers_[i]->service_.add_response(response, delay_ms);
|
|
|
|
}
|
|
|
|
|
|
|
|
Status SendRpc(EchoResponse* response = nullptr, int timeout_ms = 1000,
|
|
|
|
bool wait_for_ready = false) {
|
|
|
|
const bool local_response = (response == nullptr);
|
|
|
|
if (local_response) response = new EchoResponse;
|
|
|
|
EchoRequest request;
|
|
|
|
request.set_message(kRequestMessage_);
|
|
|
|
ClientContext context;
|
|
|
|
context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms));
|
|
|
|
if (wait_for_ready) context.set_wait_for_ready(true);
|
|
|
|
Status status = stub_->Echo(&context, request, response);
|
|
|
|
if (local_response) delete response;
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
void CheckRpcSendOk(const size_t times = 1, const int timeout_ms = 1000,
|
|
|
|
bool wait_for_ready = false) {
|
|
|
|
for (size_t i = 0; i < times; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response, timeout_ms, wait_for_ready);
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void CheckRpcSendFailure() {
|
|
|
|
const Status status = SendRpc();
|
|
|
|
EXPECT_FALSE(status.ok());
|
|
|
|
}
|
|
|
|
|
|
|
|
template <typename T>
|
|
|
|
struct ServerThread {
|
|
|
|
template <typename... Args>
|
|
|
|
explicit ServerThread(const grpc::string& type, Args&&... args)
|
|
|
|
: port_(grpc_pick_unused_port_or_die()),
|
|
|
|
type_(type),
|
|
|
|
service_(std::forward<Args>(args)...) {}
|
|
|
|
|
|
|
|
void Start(const grpc::string& server_host) {
|
|
|
|
gpr_log(GPR_INFO, "starting %s server on port %d", type_.c_str(), port_);
|
|
|
|
GPR_ASSERT(!running_);
|
|
|
|
running_ = true;
|
|
|
|
service_.Start();
|
|
|
|
grpc::internal::Mutex mu;
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// by ServerThread::Serve from firing before the wait below is hit.
|
|
|
|
grpc::internal::MutexLock lock(&mu);
|
|
|
|
grpc::internal::CondVar cond;
|
|
|
|
thread_.reset(new std::thread(
|
|
|
|
std::bind(&ServerThread::Serve, this, server_host, &mu, &cond)));
|
|
|
|
cond.Wait(&mu);
|
|
|
|
gpr_log(GPR_INFO, "%s server startup complete", type_.c_str());
|
|
|
|
}
|
|
|
|
|
|
|
|
void Serve(const grpc::string& server_host, grpc::internal::Mutex* mu,
|
|
|
|
grpc::internal::CondVar* cond) {
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// below from firing before its corresponding wait is executed.
|
|
|
|
grpc::internal::MutexLock lock(mu);
|
|
|
|
std::ostringstream server_address;
|
|
|
|
server_address << server_host << ":" << port_;
|
|
|
|
ServerBuilder builder;
|
|
|
|
std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials(
|
|
|
|
grpc_fake_transport_security_server_credentials_create()));
|
|
|
|
builder.AddListeningPort(server_address.str(), creds);
|
|
|
|
builder.RegisterService(&service_);
|
|
|
|
server_ = builder.BuildAndStart();
|
|
|
|
cond->Signal();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
if (!running_) return;
|
|
|
|
gpr_log(GPR_INFO, "%s about to shutdown", type_.c_str());
|
|
|
|
service_.Shutdown();
|
|
|
|
server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0));
|
|
|
|
thread_->join();
|
|
|
|
gpr_log(GPR_INFO, "%s shutdown completed", type_.c_str());
|
|
|
|
running_ = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
const int port_;
|
|
|
|
grpc::string type_;
|
|
|
|
T service_;
|
|
|
|
std::unique_ptr<Server> server_;
|
|
|
|
std::unique_ptr<std::thread> thread_;
|
|
|
|
bool running_ = false;
|
|
|
|
};
|
|
|
|
|
|
|
|
const grpc::string server_host_;
|
|
|
|
const size_t num_backends_;
|
|
|
|
const size_t num_balancers_;
|
|
|
|
const int client_load_reporting_interval_seconds_;
|
|
|
|
std::shared_ptr<Channel> channel_;
|
|
|
|
std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
|
|
|
|
std::vector<std::unique_ptr<ServerThread<BackendServiceImpl>>> backends_;
|
|
|
|
std::vector<std::unique_ptr<ServerThread<BalancerServiceImpl>>> balancers_;
|
|
|
|
grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
|
|
|
|
response_generator_;
|
|
|
|
const grpc::string kRequestMessage_ = "Live long and prosper.";
|
|
|
|
const grpc::string kApplicationTargetName_ = "application_target_name";
|
|
|
|
};
|
|
|
|
|
|
|
|
class SingleBalancerTest : public GrpclbEnd2endTest {
|
|
|
|
public:
|
|
|
|
SingleBalancerTest() : GrpclbEnd2endTest(4, 1, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, Vanilla) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// We need to wait for all backends to come online.
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SelectGrpclbWithMigrationServiceConfig) {
|
|
|
|
SetNextResolutionAllBalancers(
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"grpclb\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
CheckRpcSendOk(1, 1000 /* timeout_ms */, true /* wait_for_ready */);
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest,
|
|
|
|
DoNotSpecialCaseUseGrpclbWithLoadBalancingConfigTest) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution({AddressData{backends_[0]->port_, false, ""},
|
|
|
|
AddressData{balancers_[0]->port_, true, ""}},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" {\"pick_first\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
CheckRpcSendOk();
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("pick_first", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(
|
|
|
|
SingleBalancerTest,
|
|
|
|
DoNotSpecialCaseUseGrpclbWithLoadBalancingConfigTestAndNoBackendAddress) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution({AddressData{balancers_[0]->port_, true, ""}},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" {\"pick_first\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
// This should fail since we do not have a non-balancer backend
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("pick_first", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest,
|
|
|
|
SelectGrpclbWithMigrationServiceConfigAndNoAddresses) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution({},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"grpclb\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
// Try to connect.
|
|
|
|
EXPECT_EQ(GRPC_CHANNEL_IDLE, channel_->GetState(true));
|
|
|
|
// Should go into state TRANSIENT_FAILURE when we enter fallback mode.
|
|
|
|
const gpr_timespec deadline = grpc_timeout_seconds_to_deadline(1);
|
|
|
|
grpc_connectivity_state state;
|
|
|
|
while ((state = channel_->GetState(false)) !=
|
|
|
|
GRPC_CHANNEL_TRANSIENT_FAILURE) {
|
|
|
|
ASSERT_TRUE(channel_->WaitForStateChange(state, deadline));
|
|
|
|
}
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest,
|
|
|
|
SelectGrpclbWithMigrationServiceConfigAndNoBalancerAddresses) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Resolution includes fallback address but no balancers.
|
|
|
|
SetNextResolution({AddressData{backends_[0]->port_, false, ""}},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"grpclb\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
CheckRpcSendOk(1, 1000 /* timeout_ms */, true /* wait_for_ready */);
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, UsePickFirstChildPolicy) {
|
|
|
|
SetNextResolutionAllBalancers(
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"grpclb\":{\n"
|
|
|
|
" \"childPolicy\":[\n"
|
|
|
|
" { \"pick_first\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
const size_t kNumRpcs = num_backends_ * 2;
|
|
|
|
CheckRpcSendOk(kNumRpcs, 1000 /* timeout_ms */, true /* wait_for_ready */);
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// Check that all requests went to the first backend. This verifies
|
|
|
|
// that we used pick_first instead of round_robin as the child policy.
|
|
|
|
EXPECT_EQ(backends_[0]->service_.request_count(), kNumRpcs);
|
|
|
|
for (size_t i = 1; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(backends_[i]->service_.request_count(), 0UL);
|
|
|
|
}
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SwapChildPolicy) {
|
|
|
|
SetNextResolutionAllBalancers(
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"grpclb\":{\n"
|
|
|
|
" \"childPolicy\":[\n"
|
|
|
|
" { \"pick_first\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
const size_t kNumRpcs = num_backends_ * 2;
|
|
|
|
CheckRpcSendOk(kNumRpcs, 1000 /* timeout_ms */, true /* wait_for_ready */);
|
|
|
|
// Check that all requests went to the first backend. This verifies
|
|
|
|
// that we used pick_first instead of round_robin as the child policy.
|
|
|
|
EXPECT_EQ(backends_[0]->service_.request_count(), kNumRpcs);
|
|
|
|
for (size_t i = 1; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(backends_[i]->service_.request_count(), 0UL);
|
|
|
|
}
|
|
|
|
// Send new resolution that removes child policy from service config.
|
|
|
|
SetNextResolutionAllBalancers("{}");
|
|
|
|
WaitForAllBackends();
|
|
|
|
CheckRpcSendOk(kNumRpcs, 1000 /* timeout_ms */, true /* wait_for_ready */);
|
|
|
|
// Check that every backend saw the same number of requests. This verifies
|
|
|
|
// that we used round_robin.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(backends_[i]->service_.request_count(), 2UL);
|
|
|
|
}
|
|
|
|
// Done.
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, UpdatesGoToMostRecentChildPolicy) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
int unreachable_balancer_port = grpc_pick_unused_port_or_die();
|
|
|
|
int unreachable_backend_port = grpc_pick_unused_port_or_die();
|
|
|
|
// Phase 1: Start with RR pointing to first backend.
|
|
|
|
gpr_log(GPR_INFO, "PHASE 1: Initial setup with RR with first backend");
|
|
|
|
SetNextResolution(
|
|
|
|
{
|
|
|
|
// Unreachable balancer.
|
|
|
|
{unreachable_balancer_port, true, ""},
|
|
|
|
// Fallback address: first backend.
|
|
|
|
{backends_[0]->port_, false, ""},
|
|
|
|
},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"grpclb\":{\n"
|
|
|
|
" \"childPolicy\":[\n"
|
|
|
|
" { \"round_robin\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
// RPCs should go to first backend.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Phase 2: Switch to PF pointing to unreachable backend.
|
|
|
|
gpr_log(GPR_INFO, "PHASE 2: Update to use PF with unreachable backend");
|
|
|
|
SetNextResolution(
|
|
|
|
{
|
|
|
|
// Unreachable balancer.
|
|
|
|
{unreachable_balancer_port, true, ""},
|
|
|
|
// Fallback address: unreachable backend.
|
|
|
|
{unreachable_backend_port, false, ""},
|
|
|
|
},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"grpclb\":{\n"
|
|
|
|
" \"childPolicy\":[\n"
|
|
|
|
" { \"pick_first\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
// RPCs should continue to go to the first backend, because the new
|
|
|
|
// PF child policy will never go into state READY.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Phase 3: Switch back to RR pointing to second and third backends.
|
|
|
|
// This ensures that we create a new policy rather than updating the
|
|
|
|
// pending PF policy.
|
|
|
|
gpr_log(GPR_INFO, "PHASE 3: Update to use RR again with two backends");
|
|
|
|
SetNextResolution(
|
|
|
|
{
|
|
|
|
// Unreachable balancer.
|
|
|
|
{unreachable_balancer_port, true, ""},
|
|
|
|
// Fallback address: second and third backends.
|
|
|
|
{backends_[1]->port_, false, ""},
|
|
|
|
{backends_[2]->port_, false, ""},
|
|
|
|
},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"grpclb\":{\n"
|
|
|
|
" \"childPolicy\":[\n"
|
|
|
|
" { \"round_robin\":{} }\n"
|
|
|
|
" ]\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
// RPCs should go to the second and third backends.
|
|
|
|
WaitForBackend(1);
|
|
|
|
WaitForBackend(2);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SameBackendListedMultipleTimes) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
// Same backend listed twice.
|
|
|
|
std::vector<int> ports;
|
|
|
|
ports.push_back(backends_[0]->port_);
|
|
|
|
ports.push_back(backends_[0]->port_);
|
|
|
|
const size_t kNumRpcsPerAddress = 10;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(ports, {}), 0);
|
|
|
|
// We need to wait for the backend to come online.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * ports.size());
|
|
|
|
// Backend should have gotten 20 requests.
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * 2, backends_[0]->service_.request_count());
|
|
|
|
// And they should have come from a single client port, because of
|
|
|
|
// subchannel sharing.
|
|
|
|
EXPECT_EQ(1UL, backends_[0]->service_.clients().size());
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SecureNaming) {
|
|
|
|
ResetStub(0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({AddressData{balancers_[0]->port_, true, "lb"}});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// We need to wait for all backends to come online.
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("grpclb", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SecureNamingDeathTest) {
|
|
|
|
::testing::FLAGS_gtest_death_test_style = "threadsafe";
|
|
|
|
// Make sure that we blow up (via abort() from the security connector) when
|
|
|
|
// the name from the balancer doesn't match expectations.
|
|
|
|
ASSERT_DEATH_IF_SUPPORTED(
|
|
|
|
{
|
|
|
|
ResetStub(0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({AddressData{balancers_[0]->port_, true, "woops"}});
|
|
|
|
channel_->WaitForConnected(grpc_timeout_seconds_to_deadline(1));
|
|
|
|
},
|
|
|
|
"");
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const int kCallDeadlineMs = kServerlistDelayMs * 2;
|
|
|
|
// First response is an empty serverlist, sent right away.
|
|
|
|
ScheduleResponseForBalancer(0, LoadBalanceResponse(), 0);
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
kServerlistDelayMs);
|
|
|
|
const auto t0 = system_clock::now();
|
|
|
|
// Client will block: LB will initially send empty serverlist.
|
|
|
|
CheckRpcSendOk(1, kCallDeadlineMs, true /* wait_for_ready */);
|
|
|
|
const auto ellapsed_ms =
|
|
|
|
std::chrono::duration_cast<std::chrono::milliseconds>(
|
|
|
|
system_clock::now() - t0);
|
|
|
|
// but eventually, the LB sends a serverlist update that allows the call to
|
|
|
|
// proceed. The call delay must be larger than the delay in sending the
|
|
|
|
// populated serverlist but under the call's deadline (which is enforced by
|
|
|
|
// the call's deadline).
|
|
|
|
EXPECT_GT(ellapsed_ms.count(), kServerlistDelayMs);
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent two responses.
|
|
|
|
EXPECT_EQ(2U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, AllServersUnreachableFailFast) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumUnreachableServers = 5;
|
|
|
|
std::vector<int> ports;
|
|
|
|
for (size_t i = 0; i < kNumUnreachableServers; ++i) {
|
|
|
|
ports.push_back(grpc_pick_unused_port_or_die());
|
|
|
|
}
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(ports, {}), 0);
|
|
|
|
const Status status = SendRpc();
|
|
|
|
// The error shouldn't be DEADLINE_EXCEEDED.
|
|
|
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code());
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, Fallback) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const size_t kNumBackendsInResolution = backends_.size() / 2;
|
|
|
|
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
addresses.emplace_back(AddressData{backends_[i]->port_, false, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumBackendsInResolution /* start_index */), {}),
|
|
|
|
kServerlistDelayMs);
|
|
|
|
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
WaitForBackend(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
// The first request.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
|
|
|
|
// Fallback is used: each backend returned by the resolver should have
|
|
|
|
// gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
WaitForBackend(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send out the second request.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(backends_.size() - kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
|
|
|
|
// Serverlist is used: each backend returned by the balancer should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackUpdate) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const size_t kNumBackendsInResolution = backends_.size() / 3;
|
|
|
|
const size_t kNumBackendsInResolutionUpdate = backends_.size() / 3;
|
|
|
|
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
addresses.emplace_back(AddressData{backends_[i]->port_, false, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* start_index */),
|
|
|
|
{}),
|
|
|
|
kServerlistDelayMs);
|
|
|
|
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
WaitForBackend(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
// The first request.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
|
|
|
|
// Fallback is used: each backend returned by the resolver should have
|
|
|
|
// gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
addresses.clear();
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
for (size_t i = kNumBackendsInResolution;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
addresses.emplace_back(AddressData{backends_[i]->port_, false, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
|
|
|
|
// Wait until the resolution update has been processed and all the new
|
|
|
|
// fallback backends are reachable.
|
|
|
|
for (size_t i = kNumBackendsInResolution;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
WaitForBackend(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send out the second request.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolutionUpdate);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
|
|
|
|
// The resolution update is used: each backend in the resolution update should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
WaitForBackend(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send out the third request.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE THIRD BATCH ==========");
|
|
|
|
CheckRpcSendOk(backends_.size() - kNumBackendsInResolution -
|
|
|
|
kNumBackendsInResolutionUpdate);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH THIRD BATCH ==========");
|
|
|
|
|
|
|
|
// Serverlist is used: each backend returned by the balancer should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest,
|
|
|
|
FallbackAfterStartup_LoseContactWithBalancerThenBackends) {
|
|
|
|
// First two backends are fallback, last two are pointed to by balancer.
|
|
|
|
const size_t kNumFallbackBackends = 2;
|
|
|
|
const size_t kNumBalancerBackends = backends_.size() - kNumFallbackBackends;
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
for (size_t i = 0; i < kNumFallbackBackends; ++i) {
|
|
|
|
addresses.emplace_back(AddressData{backends_[i]->port_, false, ""});
|
|
|
|
}
|
|
|
|
for (size_t i = 0; i < balancers_.size(); ++i) {
|
|
|
|
addresses.emplace_back(AddressData{balancers_[i]->port_, true, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumFallbackBackends), {}),
|
|
|
|
0);
|
|
|
|
// Try to connect.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumFallbackBackends /* start_index */);
|
|
|
|
// Stop balancer. RPCs should continue going to backends from balancer.
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
CheckRpcSendOk(100 * kNumBalancerBackends);
|
|
|
|
for (size_t i = kNumFallbackBackends; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(100UL, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
// Stop backends from balancer. This should put us in fallback mode.
|
|
|
|
for (size_t i = kNumFallbackBackends; i < backends_.size(); ++i) {
|
|
|
|
ShutdownBackend(i);
|
|
|
|
}
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */, 0 /* start_index */,
|
|
|
|
kNumFallbackBackends /* stop_index */);
|
|
|
|
// Restart the backends from the balancer. We should *not* start
|
|
|
|
// sending traffic back to them at this point (although the behavior
|
|
|
|
// in xds may be different).
|
|
|
|
for (size_t i = kNumFallbackBackends; i < backends_.size(); ++i) {
|
|
|
|
StartBackend(i);
|
|
|
|
}
|
|
|
|
CheckRpcSendOk(100 * kNumBalancerBackends);
|
|
|
|
for (size_t i = 0; i < kNumFallbackBackends; ++i) {
|
|
|
|
EXPECT_EQ(100UL, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
// Now start the balancer again. This should cause us to exit
|
|
|
|
// fallback mode.
|
|
|
|
balancers_[0]->Start(server_host_);
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumFallbackBackends), {}),
|
|
|
|
0);
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumFallbackBackends /* start_index */);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest,
|
|
|
|
FallbackAfterStartup_LoseContactWithBackendsThenBalancer) {
|
|
|
|
// First two backends are fallback, last two are pointed to by balancer.
|
|
|
|
const size_t kNumFallbackBackends = 2;
|
|
|
|
const size_t kNumBalancerBackends = backends_.size() - kNumFallbackBackends;
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
for (size_t i = 0; i < kNumFallbackBackends; ++i) {
|
|
|
|
addresses.emplace_back(AddressData{backends_[i]->port_, false, ""});
|
|
|
|
}
|
|
|
|
for (size_t i = 0; i < balancers_.size(); ++i) {
|
|
|
|
addresses.emplace_back(AddressData{balancers_[i]->port_, true, ""});
|
|
|
|
}
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumFallbackBackends), {}),
|
|
|
|
0);
|
|
|
|
// Try to connect.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumFallbackBackends /* start_index */);
|
|
|
|
// Stop backends from balancer. Since we are still in contact with
|
|
|
|
// the balancer at this point, RPCs should be failing.
|
|
|
|
for (size_t i = kNumFallbackBackends; i < backends_.size(); ++i) {
|
|
|
|
ShutdownBackend(i);
|
|
|
|
}
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
// Stop balancer. This should put us in fallback mode.
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */, 0 /* start_index */,
|
|
|
|
kNumFallbackBackends /* stop_index */);
|
|
|
|
// Restart the backends from the balancer. We should *not* start
|
|
|
|
// sending traffic back to them at this point (although the behavior
|
|
|
|
// in xds may be different).
|
|
|
|
for (size_t i = kNumFallbackBackends; i < backends_.size(); ++i) {
|
|
|
|
StartBackend(i);
|
|
|
|
}
|
|
|
|
CheckRpcSendOk(100 * kNumBalancerBackends);
|
|
|
|
for (size_t i = 0; i < kNumFallbackBackends; ++i) {
|
|
|
|
EXPECT_EQ(100UL, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
// Now start the balancer again. This should cause us to exit
|
|
|
|
// fallback mode.
|
|
|
|
balancers_[0]->Start(server_host_);
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumFallbackBackends), {}),
|
|
|
|
0);
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumFallbackBackends /* start_index */);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackEarlyWhenBalancerChannelFails) {
|
|
|
|
const int kFallbackTimeoutMs = 10000 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{grpc_pick_unused_port_or_die(), true, ""});
|
|
|
|
addresses.emplace_back(AddressData{backends_[0]->port_, false, ""});
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
// Send RPC with deadline less than the fallback timeout and make sure it
|
|
|
|
// succeeds.
|
|
|
|
CheckRpcSendOk(/* times */ 1, /* timeout_ms */ 1000,
|
|
|
|
/* wait_for_ready */ false);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackEarlyWhenBalancerCallFails) {
|
|
|
|
const int kFallbackTimeoutMs = 10000 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{backends_[0]->port_, false, ""});
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
// Balancer drops call without sending a serverlist.
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// Send RPC with deadline less than the fallback timeout and make sure it
|
|
|
|
// succeeds.
|
|
|
|
CheckRpcSendOk(/* times */ 1, /* timeout_ms */ 1000,
|
|
|
|
/* wait_for_ready */ false);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, BackendsRestart) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
// Stop backends. RPCs should fail.
|
|
|
|
ShutdownAllBackends();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
// Restart backends. RPCs should start succeeding again.
|
|
|
|
StartAllBackends();
|
|
|
|
CheckRpcSendOk(1 /* times */, 2000 /* timeout_ms */,
|
|
|
|
true /* wait_for_ready */);
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
class UpdatesTest : public GrpclbEnd2endTest {
|
|
|
|
public:
|
|
|
|
UpdatesTest() : GrpclbEnd2endTest(4, 3, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersButKeepUsingOriginalBalancer) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const std::vector<int> first_backend{GetBackendPorts()[0]};
|
|
|
|
const std::vector<int> second_backend{GetBackendPorts()[1]};
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0);
|
|
|
|
|
|
|
|
// Wait until the first backend is ready.
|
|
|
|
WaitForBackend(0);
|
|
|
|
|
|
|
|
// Send 10 requests.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->service_.request_count());
|
|
|
|
|
|
|
|
// Balancer 0 got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[1]->port_, true, ""});
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// The current LB call is still working, so grpclb continued using it to the
|
|
|
|
// first balancer, which doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send an update with the same set of LBs as the one in SetUp() in order to
|
|
|
|
// verify that the LB channel inside grpclb keeps the initial connection (which
|
|
|
|
// by definition is also present in the update).
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersRepeated) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const std::vector<int> first_backend{GetBackendPorts()[0]};
|
|
|
|
const std::vector<int> second_backend{GetBackendPorts()[0]};
|
|
|
|
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0);
|
|
|
|
|
|
|
|
// Wait until the first backend is ready.
|
|
|
|
WaitForBackend(0);
|
|
|
|
|
|
|
|
// Send 10 requests.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->service_.request_count());
|
|
|
|
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// Balancer 0 got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{balancers_[1]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{balancers_[2]->port_, true, ""});
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// grpclb continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
|
|
|
|
addresses.clear();
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{balancers_[1]->port_, true, ""});
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 2 ==========");
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 2 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// grpclb continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
const std::vector<int> first_backend{GetBackendPorts()[0]};
|
|
|
|
const std::vector<int> second_backend{GetBackendPorts()[1]};
|
|
|
|
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0);
|
|
|
|
|
|
|
|
// Start servers and send 10 RPCs per server.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->service_.request_count());
|
|
|
|
|
|
|
|
// Kill balancer 0
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BALANCER 0 *************");
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BALANCER 0 *************");
|
|
|
|
|
|
|
|
// This is serviced by the existing RR policy
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should again have gone to the first backend.
|
|
|
|
EXPECT_EQ(20U, backends_[0]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
|
|
|
|
// Balancer 0 got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
|
|
|
|
addresses.clear();
|
|
|
|
addresses.emplace_back(AddressData{balancers_[1]->port_, true, ""});
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
// Wait until update has been processed, as signaled by the second backend
|
|
|
|
// receiving a request. In the meantime, the client continues to be serviced
|
|
|
|
// (by the first backend) without interruption.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->service_.request_count());
|
|
|
|
WaitForBackend(1);
|
|
|
|
|
|
|
|
// This is serviced by the updated RR policy
|
|
|
|
backends_[1]->service_.ResetCounters();
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE THIRD BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH THIRD BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the second backend.
|
|
|
|
EXPECT_EQ(10U, backends_[1]->service_.request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// The second balancer, published as part of the first update, may end up
|
|
|
|
// getting two requests (that is, 1 <= #req <= 2) if the LB call retry timer
|
|
|
|
// firing races with the arrival of the update containing the second
|
|
|
|
// balancer.
|
|
|
|
EXPECT_GE(balancers_[1]->service_.request_count(), 1U);
|
|
|
|
EXPECT_GE(balancers_[1]->service_.response_count(), 1U);
|
|
|
|
EXPECT_LE(balancers_[1]->service_.request_count(), 2U);
|
|
|
|
EXPECT_LE(balancers_[1]->service_.response_count(), 2U);
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, ReresolveDeadBackend) {
|
|
|
|
ResetStub(500);
|
|
|
|
// The first resolution contains the addresses of a balancer that never
|
|
|
|
// responds, and a fallback backend.
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{backends_[0]->port_, false, ""});
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
// Ask channel to connect to trigger resolver creation.
|
|
|
|
channel_->GetState(true);
|
|
|
|
// The re-resolution result will contain the addresses of the same balancer
|
|
|
|
// and a new fallback backend.
|
|
|
|
addresses.clear();
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
addresses.emplace_back(AddressData{backends_[1]->port_, false, ""});
|
|
|
|
SetNextReresolutionResponse(addresses);
|
|
|
|
|
|
|
|
// Start servers and send 10 RPCs per server.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the fallback backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->service_.request_count());
|
|
|
|
|
|
|
|
// Kill backend 0.
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BACKEND 0 *************");
|
|
|
|
backends_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BACKEND 0 *************");
|
|
|
|
|
|
|
|
// Wait until re-resolution has finished, as signaled by the second backend
|
|
|
|
// receiving a request.
|
|
|
|
WaitForBackend(1);
|
|
|
|
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the second backend.
|
|
|
|
EXPECT_EQ(10U, backends_[1]->service_.request_count());
|
|
|
|
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
balancers_[1]->service_.NotifyDoneWithServerlists();
|
|
|
|
balancers_[2]->service_.NotifyDoneWithServerlists();
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// TODO(juanlishen): Should be removed when the first response is always the
|
|
|
|
// initial response. Currently, if client load reporting is not enabled, the
|
|
|
|
// balancer doesn't send initial response. When the backend shuts down, an
|
|
|
|
// unexpected re-resolution will happen. This test configuration is a workaround
|
|
|
|
// for test ReresolveDeadBalancer.
|
|
|
|
class UpdatesWithClientLoadReportingTest : public GrpclbEnd2endTest {
|
|
|
|
public:
|
|
|
|
UpdatesWithClientLoadReportingTest() : GrpclbEnd2endTest(4, 3, 2) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(UpdatesWithClientLoadReportingTest, ReresolveDeadBalancer) {
|
|
|
|
// Ask channel to connect to trigger resolver creation.
|
|
|
|
channel_->GetState(true);
|
|
|
|
std::vector<AddressData> addresses;
|
|
|
|
addresses.emplace_back(AddressData{balancers_[0]->port_, true, ""});
|
|
|
|
SetNextResolution(addresses);
|
|
|
|
addresses.clear();
|
|
|
|
addresses.emplace_back(AddressData{balancers_[1]->port_, true, ""});
|
|
|
|
SetNextReresolutionResponse(addresses);
|
|
|
|
const std::vector<int> first_backend{GetBackendPorts()[0]};
|
|
|
|
const std::vector<int> second_backend{GetBackendPorts()[1]};
|
|
|
|
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(first_backend, {}), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, BalancerServiceImpl::BuildResponseForBackends(second_backend, {}), 0);
|
|
|
|
|
|
|
|
// Start servers and send 10 RPCs per server.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->service_.request_count());
|
|
|
|
|
|
|
|
// Kill backend 0.
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BACKEND 0 *************");
|
|
|
|
backends_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BACKEND 0 *************");
|
|
|
|
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
|
|
|
|
// Balancer 0 got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->service_.response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
|
|
|
|
// Kill balancer 0.
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BALANCER 0 *************");
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BALANCER 0 *************");
|
|
|
|
|
|
|
|
// Wait until re-resolution has finished, as signaled by the second backend
|
|
|
|
// receiving a request.
|
|
|
|
WaitForBackend(1);
|
|
|
|
|
|
|
|
// This is serviced by the new serverlist.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the second backend.
|
|
|
|
EXPECT_EQ(10U, backends_[1]->service_.request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
// After balancer 0 is killed, we restart an LB call immediately (because we
|
|
|
|
// disconnect to a previously connected balancer). Although we will cancel
|
|
|
|
// this call when the re-resolution update is done and another LB call restart
|
|
|
|
// is needed, this old call may still succeed reaching the LB server if
|
|
|
|
// re-resolution is slow. So balancer 1 may have received 2 requests and sent
|
|
|
|
// 2 responses.
|
|
|
|
EXPECT_GE(balancers_[1]->service_.request_count(), 1U);
|
|
|
|
EXPECT_GE(balancers_[1]->service_.response_count(), 1U);
|
|
|
|
EXPECT_LE(balancers_[1]->service_.request_count(), 2U);
|
|
|
|
EXPECT_LE(balancers_[1]->service_.response_count(), 2U);
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, Drop) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
const int num_of_drop_by_rate_limiting_addresses = 1;
|
|
|
|
const int num_of_drop_by_load_balancing_addresses = 2;
|
|
|
|
const int num_of_drop_addresses = num_of_drop_by_rate_limiting_addresses +
|
|
|
|
num_of_drop_by_load_balancing_addresses;
|
|
|
|
const int num_total_addresses = num_backends_ + num_of_drop_addresses;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(),
|
|
|
|
{{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
|
|
|
|
{"load_balancing", num_of_drop_by_load_balancing_addresses}}),
|
|
|
|
0);
|
|
|
|
// Wait until all backends are ready.
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs for each server and drop address.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcsPerAddress * num_total_addresses; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_of_drop_addresses, num_drops);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, DropAllFirst) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
// All registered addresses are marked as "drop".
|
|
|
|
const int num_of_drop_by_rate_limiting_addresses = 1;
|
|
|
|
const int num_of_drop_by_load_balancing_addresses = 1;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
{}, {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
|
|
|
|
{"load_balancing", num_of_drop_by_load_balancing_addresses}}),
|
|
|
|
0);
|
|
|
|
const Status status = SendRpc(nullptr, 1000, true);
|
|
|
|
EXPECT_FALSE(status.ok());
|
|
|
|
EXPECT_EQ(status.error_message(), "Call dropped by load balancing policy");
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, DropAll) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
const int num_of_drop_by_rate_limiting_addresses = 1;
|
|
|
|
const int num_of_drop_by_load_balancing_addresses = 1;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
{}, {{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
|
|
|
|
{"load_balancing", num_of_drop_by_load_balancing_addresses}}),
|
|
|
|
1000);
|
|
|
|
|
|
|
|
// First call succeeds.
|
|
|
|
CheckRpcSendOk();
|
|
|
|
// But eventually, the update with only dropped servers is processed and calls
|
|
|
|
// fail.
|
|
|
|
Status status;
|
|
|
|
do {
|
|
|
|
status = SendRpc(nullptr, 1000, true);
|
|
|
|
} while (status.ok());
|
|
|
|
EXPECT_FALSE(status.ok());
|
|
|
|
EXPECT_EQ(status.error_message(), "Call dropped by load balancing policy");
|
|
|
|
}
|
|
|
|
|
|
|
|
class SingleBalancerWithClientLoadReportingTest : public GrpclbEnd2endTest {
|
|
|
|
public:
|
|
|
|
SingleBalancerWithClientLoadReportingTest() : GrpclbEnd2endTest(4, 1, 3) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, BalancerServiceImpl::BuildResponseForBackends(GetBackendPorts(), {}),
|
|
|
|
0);
|
|
|
|
// Wait until all backends are ready.
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
|
|
|
|
const ClientStats client_stats = WaitForLoadReports();
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats.num_calls_started);
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats.num_calls_finished);
|
|
|
|
EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + (num_ok + num_drops),
|
|
|
|
client_stats.num_calls_finished_known_received);
|
|
|
|
EXPECT_THAT(client_stats.drop_token_counts, ::testing::ElementsAre());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerWithClientLoadReportingTest, BalancerRestart) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumBackendsFirstPass = 2;
|
|
|
|
const size_t kNumBackendsSecondPass =
|
|
|
|
backends_.size() - kNumBackendsFirstPass;
|
|
|
|
// Balancer returns backends starting at index 1.
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(0, kNumBackendsFirstPass), {}),
|
|
|
|
0);
|
|
|
|
// Wait until all backends returned by the balancer are ready.
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) =
|
|
|
|
WaitForAllBackends(/* num_requests_multiple_of */ 1, /* start_index */ 0,
|
|
|
|
/* stop_index */ kNumBackendsFirstPass);
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
ClientStats client_stats = WaitForLoadReports();
|
|
|
|
EXPECT_EQ(static_cast<size_t>(num_ok), client_stats.num_calls_started);
|
|
|
|
EXPECT_EQ(static_cast<size_t>(num_ok), client_stats.num_calls_finished);
|
|
|
|
EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
|
|
|
|
EXPECT_EQ(static_cast<size_t>(num_ok),
|
|
|
|
client_stats.num_calls_finished_known_received);
|
|
|
|
EXPECT_THAT(client_stats.drop_token_counts, ::testing::ElementsAre());
|
|
|
|
// Shut down the balancer.
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
// Send 10 more requests per backend. This will continue using the
|
|
|
|
// last serverlist we received from the balancer before it was shut down.
|
|
|
|
ResetBackendCounters();
|
|
|
|
CheckRpcSendOk(kNumBackendsFirstPass);
|
|
|
|
// Each backend should have gotten 1 request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsFirstPass; ++i) {
|
|
|
|
EXPECT_EQ(1UL, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
// Now restart the balancer, this time pointing to all backends.
|
|
|
|
balancers_[0]->Start(server_host_);
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(kNumBackendsFirstPass), {}),
|
|
|
|
0);
|
|
|
|
// Wait for queries to start going to one of the new backends.
|
|
|
|
// This tells us that we're now using the new serverlist.
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (backends_[2]->service_.request_count() == 0 &&
|
|
|
|
backends_[3]->service_.request_count() == 0);
|
|
|
|
// Send one RPC per backend.
|
|
|
|
CheckRpcSendOk(kNumBackendsSecondPass);
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// Check client stats.
|
|
|
|
client_stats = WaitForLoadReports();
|
|
|
|
EXPECT_EQ(kNumBackendsSecondPass + 1, client_stats.num_calls_started);
|
|
|
|
EXPECT_EQ(kNumBackendsSecondPass + 1, client_stats.num_calls_finished);
|
|
|
|
EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
|
|
|
|
EXPECT_EQ(kNumBackendsSecondPass + 1,
|
|
|
|
client_stats.num_calls_finished_known_received);
|
|
|
|
EXPECT_THAT(client_stats.drop_token_counts, ::testing::ElementsAre());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerWithClientLoadReportingTest, Drop) {
|
|
|
|
SetNextResolutionAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 3;
|
|
|
|
const int num_of_drop_by_rate_limiting_addresses = 2;
|
|
|
|
const int num_of_drop_by_load_balancing_addresses = 1;
|
|
|
|
const int num_of_drop_addresses = num_of_drop_by_rate_limiting_addresses +
|
|
|
|
num_of_drop_by_load_balancing_addresses;
|
|
|
|
const int num_total_addresses = num_backends_ + num_of_drop_addresses;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
BalancerServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPorts(),
|
|
|
|
{{"rate_limiting", num_of_drop_by_rate_limiting_addresses},
|
|
|
|
{"load_balancing", num_of_drop_by_load_balancing_addresses}}),
|
|
|
|
0);
|
|
|
|
// Wait until all backends are ready.
|
|
|
|
int num_warmup_ok = 0;
|
|
|
|
int num_warmup_failure = 0;
|
|
|
|
int num_warmup_drops = 0;
|
|
|
|
std::tie(num_warmup_ok, num_warmup_failure, num_warmup_drops) =
|
|
|
|
WaitForAllBackends(num_total_addresses /* num_requests_multiple_of */);
|
|
|
|
const int num_total_warmup_requests =
|
|
|
|
num_warmup_ok + num_warmup_failure + num_warmup_drops;
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcsPerAddress * num_total_addresses; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_of_drop_addresses, num_drops);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress, backends_[i]->service_.request_count());
|
|
|
|
}
|
|
|
|
balancers_[0]->service_.NotifyDoneWithServerlists();
|
|
|
|
// The balancer got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.request_count());
|
|
|
|
// and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->service_.response_count());
|
|
|
|
|
|
|
|
const ClientStats client_stats = WaitForLoadReports();
|
|
|
|
EXPECT_EQ(
|
|
|
|
kNumRpcsPerAddress * num_total_addresses + num_total_warmup_requests,
|
|
|
|
client_stats.num_calls_started);
|
|
|
|
EXPECT_EQ(
|
|
|
|
kNumRpcsPerAddress * num_total_addresses + num_total_warmup_requests,
|
|
|
|
client_stats.num_calls_finished);
|
|
|
|
EXPECT_EQ(0U, client_stats.num_calls_finished_with_client_failed_to_send);
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_warmup_ok,
|
|
|
|
client_stats.num_calls_finished_known_received);
|
|
|
|
// The number of warmup request is a multiple of the number of addresses.
|
|
|
|
// Therefore, all addresses in the scheduled balancer response are hit the
|
|
|
|
// same number of times.
|
|
|
|
const int num_times_drop_addresses_hit =
|
|
|
|
num_warmup_drops / num_of_drop_addresses;
|
|
|
|
EXPECT_THAT(
|
|
|
|
client_stats.drop_token_counts,
|
|
|
|
::testing::ElementsAre(
|
|
|
|
::testing::Pair("load_balancing",
|
|
|
|
(kNumRpcsPerAddress + num_times_drop_addresses_hit)),
|
|
|
|
::testing::Pair(
|
|
|
|
"rate_limiting",
|
|
|
|
(kNumRpcsPerAddress + num_times_drop_addresses_hit) * 2)));
|
|
|
|
}
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
} // namespace testing
|
|
|
|
} // namespace grpc
|
|
|
|
|
|
|
|
int main(int argc, char** argv) {
|
|
|
|
grpc::testing::TestEnvironment env(argc, argv);
|
|
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
|
|
const auto result = RUN_ALL_TESTS();
|
|
|
|
return result;
|
|
|
|
}
|