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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/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/lib/gpr/env.h"
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#include "src/core/lib/gprpp/map.h"
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#include "src/core/lib/gprpp/ref_counted_ptr.h"
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#include "src/core/lib/gprpp/sync.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/v2/eds_for_test.grpc.pb.h"
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#include "src/proto/grpc/lb/v2/lrs_for_test.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 xds 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 xds 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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namespace grpc {
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namespace testing {
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namespace {
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using std::chrono::system_clock;
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using ::envoy::api::v2::ClusterLoadAssignment;
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using ::envoy::api::v2::DiscoveryRequest;
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using ::envoy::api::v2::DiscoveryResponse;
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using ::envoy::api::v2::EndpointDiscoveryService;
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using ::envoy::service::load_stats::v2::ClusterStats;
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using ::envoy::service::load_stats::v2::LoadReportingService;
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using ::envoy::service::load_stats::v2::LoadStatsRequest;
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using ::envoy::service::load_stats::v2::LoadStatsResponse;
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using ::envoy::service::load_stats::v2::UpstreamLocalityStats;
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constexpr char kEdsTypeUrl[] =
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"type.googleapis.com/envoy.api.v2.ClusterLoadAssignment";
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constexpr char kDefaultLocalityRegion[] = "xds_default_locality_region";
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constexpr char kDefaultLocalityZone[] = "xds_default_locality_zone";
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constexpr char kDefaultLocalitySubzone[] = "xds_default_locality_subzone";
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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_core::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_core::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_core::MutexLock lock(&mu_);
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++response_count_;
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}
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void IncreaseRequestCount() {
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grpc_core::MutexLock lock(&mu_);
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++request_count_;
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}
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void ResetCounters() {
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grpc_core::MutexLock lock(&mu_);
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request_count_ = 0;
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response_count_ = 0;
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}
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protected:
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grpc_core::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 EdsService = CountedService<EndpointDiscoveryService::Service>;
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using LrsService = CountedService<LoadReportingService::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_core::MutexLock lock(&clients_mu_);
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return clients_;
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}
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private:
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void AddClient(const grpc::string& client) {
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grpc_core::MutexLock lock(&clients_mu_);
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clients_.insert(client);
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}
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grpc_core::Mutex mu_;
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grpc_core::Mutex clients_mu_;
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std::set<grpc::string> clients_;
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};
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class ClientStats {
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public:
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struct LocalityStats {
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// Converts from proto message class.
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LocalityStats(const UpstreamLocalityStats& upstream_locality_stats)
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: total_successful_requests(
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upstream_locality_stats.total_successful_requests()),
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total_requests_in_progress(
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upstream_locality_stats.total_requests_in_progress()),
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total_error_requests(upstream_locality_stats.total_error_requests()),
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total_issued_requests(
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upstream_locality_stats.total_issued_requests()) {}
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uint64_t total_successful_requests;
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uint64_t total_requests_in_progress;
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uint64_t total_error_requests;
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uint64_t total_issued_requests;
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};
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// Converts from proto message class.
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ClientStats(const ClusterStats& cluster_stats)
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: total_dropped_requests_(cluster_stats.total_dropped_requests()) {
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for (const auto& input_locality_stats :
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cluster_stats.upstream_locality_stats()) {
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locality_stats_.emplace(input_locality_stats.locality().sub_zone(),
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LocalityStats(input_locality_stats));
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}
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}
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uint64_t total_successful_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_successful_requests;
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}
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return sum;
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}
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uint64_t total_requests_in_progress() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_requests_in_progress;
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}
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return sum;
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}
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uint64_t total_error_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_error_requests;
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}
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return sum;
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}
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uint64_t total_issued_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_issued_requests;
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}
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return sum;
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}
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uint64_t total_dropped_requests() const { return total_dropped_requests_; }
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private:
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std::map<grpc::string, LocalityStats> locality_stats_;
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uint64_t total_dropped_requests_;
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};
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class EdsServiceImpl : public EdsService {
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public:
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using Stream = ServerReaderWriter<DiscoveryResponse, DiscoveryRequest>;
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using ResponseDelayPair = std::pair<DiscoveryResponse, int>;
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Status StreamEndpoints(ServerContext* context, Stream* stream) override {
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gpr_log(GPR_INFO, "LB[%p]: EDS StreamEndpoints starts", this);
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[&]() {
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{
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grpc_core::MutexLock lock(&eds_mu_);
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if (eds_done_) return;
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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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// Read request.
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DiscoveryRequest request;
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if (!stream->Read(&request)) return;
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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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// Send response.
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std::vector<ResponseDelayPair> responses_and_delays;
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{
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grpc_core::MutexLock lock(&eds_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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// Wait until notified done.
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grpc_core::MutexLock lock(&eds_mu_);
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eds_cond_.WaitUntil(&eds_mu_, [this] { return eds_done_; });
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}();
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gpr_log(GPR_INFO, "LB[%p]: EDS StreamEndpoints done", this);
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return Status::OK;
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}
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void add_response(const DiscoveryResponse& response, int send_after_ms) {
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grpc_core::MutexLock lock(&eds_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_core::MutexLock lock(&eds_mu_);
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eds_done_ = false;
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responses_and_delays_.clear();
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}
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void Shutdown() {
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{
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grpc_core::MutexLock lock(&eds_mu_);
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NotifyDoneWithEdsCallLocked();
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responses_and_delays_.clear();
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}
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gpr_log(GPR_INFO, "LB[%p]: shut down", this);
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}
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static DiscoveryResponse BuildResponseForBackends(
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const std::vector<std::vector<int>>& backend_ports) {
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ClusterLoadAssignment assignment;
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assignment.set_cluster_name("service name");
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for (size_t i = 0; i < backend_ports.size(); ++i) {
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auto* endpoints = assignment.add_endpoints();
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endpoints->mutable_load_balancing_weight()->set_value(3);
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endpoints->set_priority(0);
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endpoints->mutable_locality()->set_region(kDefaultLocalityRegion);
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endpoints->mutable_locality()->set_zone(kDefaultLocalityZone);
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std::ostringstream sub_zone;
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sub_zone << kDefaultLocalitySubzone << '_' << i;
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endpoints->mutable_locality()->set_sub_zone(sub_zone.str());
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for (const int& backend_port : backend_ports[i]) {
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auto* lb_endpoints = endpoints->add_lb_endpoints();
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auto* endpoint = lb_endpoints->mutable_endpoint();
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auto* address = endpoint->mutable_address();
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auto* socket_address = address->mutable_socket_address();
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socket_address->set_address("127.0.0.1");
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socket_address->set_port_value(backend_port);
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}
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}
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DiscoveryResponse response;
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response.set_type_url(kEdsTypeUrl);
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response.add_resources()->PackFrom(assignment);
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return response;
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}
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void NotifyDoneWithEdsCall() {
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grpc_core::MutexLock lock(&eds_mu_);
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NotifyDoneWithEdsCallLocked();
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}
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void NotifyDoneWithEdsCallLocked() {
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if (!eds_done_) {
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eds_done_ = true;
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eds_cond_.Broadcast();
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}
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}
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private:
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void SendResponse(Stream* stream, const DiscoveryResponse& 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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grpc_core::CondVar eds_cond_;
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|
// Protect the members below.
|
|
|
|
grpc_core::Mutex eds_mu_;
|
|
|
|
bool eds_done_ = false;
|
|
|
|
std::vector<ResponseDelayPair> responses_and_delays_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class LrsServiceImpl : public LrsService {
|
|
|
|
public:
|
|
|
|
using Stream = ServerReaderWriter<LoadStatsResponse, LoadStatsRequest>;
|
|
|
|
|
|
|
|
explicit LrsServiceImpl(int client_load_reporting_interval_seconds)
|
|
|
|
: client_load_reporting_interval_seconds_(
|
|
|
|
client_load_reporting_interval_seconds) {}
|
|
|
|
|
|
|
|
Status StreamLoadStats(ServerContext* context, Stream* stream) override {
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: LRS StreamLoadStats starts", this);
|
|
|
|
// Read request.
|
|
|
|
LoadStatsRequest request;
|
|
|
|
if (stream->Read(&request)) {
|
|
|
|
if (client_load_reporting_interval_seconds_ > 0) {
|
|
|
|
IncreaseRequestCount();
|
|
|
|
// Send response.
|
|
|
|
LoadStatsResponse response;
|
|
|
|
auto server_name = request.cluster_stats()[0].cluster_name();
|
|
|
|
GPR_ASSERT(server_name != "");
|
|
|
|
response.add_clusters(server_name);
|
|
|
|
response.mutable_load_reporting_interval()->set_seconds(
|
|
|
|
client_load_reporting_interval_seconds_);
|
|
|
|
stream->Write(response);
|
|
|
|
IncreaseResponseCount();
|
|
|
|
// Wait for report.
|
|
|
|
request.Clear();
|
|
|
|
if (stream->Read(&request)) {
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: received client load report message '%s'",
|
|
|
|
this, request.DebugString().c_str());
|
|
|
|
GPR_ASSERT(request.cluster_stats().size() == 1);
|
|
|
|
const ClusterStats& cluster_stats = request.cluster_stats()[0];
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// below from firing before its corresponding wait is executed.
|
|
|
|
grpc_core::MutexLock lock(&load_report_mu_);
|
|
|
|
GPR_ASSERT(client_stats_ == nullptr);
|
|
|
|
client_stats_.reset(new ClientStats(cluster_stats));
|
|
|
|
load_report_ready_ = true;
|
|
|
|
load_report_cond_.Signal();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Wait until notified done.
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
lrs_cv_.WaitUntil(&lrs_mu_, [this] { return lrs_done; });
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: LRS done", this);
|
|
|
|
return Status::OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Start() {
|
|
|
|
lrs_done = false;
|
|
|
|
load_report_ready_ = false;
|
|
|
|
client_stats_.reset();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
NotifyDoneWithLrsCallLocked();
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: shut down", this);
|
|
|
|
}
|
|
|
|
|
|
|
|
ClientStats* WaitForLoadReport() {
|
|
|
|
grpc_core::MutexLock lock(&load_report_mu_);
|
|
|
|
load_report_cond_.WaitUntil(&load_report_mu_,
|
|
|
|
[this] { return load_report_ready_; });
|
|
|
|
load_report_ready_ = false;
|
|
|
|
return client_stats_.get();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithLrsCall() {
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
NotifyDoneWithLrsCallLocked();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithLrsCallLocked() {
|
|
|
|
if (!lrs_done) {
|
|
|
|
lrs_done = true;
|
|
|
|
lrs_cv_.Broadcast();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
const int client_load_reporting_interval_seconds_;
|
|
|
|
|
|
|
|
grpc_core::CondVar lrs_cv_;
|
|
|
|
// Protect lrs_done.
|
|
|
|
grpc_core::Mutex lrs_mu_;
|
|
|
|
bool lrs_done = false;
|
|
|
|
|
|
|
|
grpc_core::CondVar load_report_cond_;
|
|
|
|
// Protect the members below.
|
|
|
|
grpc_core::Mutex load_report_mu_;
|
|
|
|
std::unique_ptr<ClientStats> client_stats_;
|
|
|
|
bool load_report_ready_ = false;
|
|
|
|
};
|
|
|
|
|
|
|
|
class XdsEnd2endTest : public ::testing::Test {
|
|
|
|
protected:
|
|
|
|
XdsEnd2endTest(size_t num_backends, size_t num_balancers,
|
|
|
|
int client_load_reporting_interval_seconds)
|
|
|
|
: server_host_("localhost"),
|
|
|
|
num_backends_(num_backends),
|
|
|
|
num_balancers_(num_balancers),
|
|
|
|
client_load_reporting_interval_seconds_(
|
|
|
|
client_load_reporting_interval_seconds) {}
|
|
|
|
|
|
|
|
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>();
|
|
|
|
lb_channel_response_generator_ =
|
|
|
|
grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
|
|
|
|
// Start the backends.
|
|
|
|
for (size_t i = 0; i < num_backends_; ++i) {
|
|
|
|
backends_.emplace_back(new BackendServerThread);
|
|
|
|
backends_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
// Start the load balancers.
|
|
|
|
for (size_t i = 0; i < num_balancers_; ++i) {
|
|
|
|
balancers_.emplace_back(
|
|
|
|
new BalancerServerThread(client_load_reporting_interval_seconds_));
|
|
|
|
balancers_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
ResetStub();
|
|
|
|
}
|
|
|
|
|
|
|
|
void TearDown() override {
|
|
|
|
ShutdownAllBackends();
|
|
|
|
for (auto& balancer : balancers_) balancer->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Start(server_host_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartBackend(size_t index) { backends_[index]->Start(server_host_); }
|
|
|
|
|
|
|
|
void ShutdownAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void ShutdownBackend(size_t index) { backends_[index]->Shutdown(); }
|
|
|
|
|
|
|
|
void ResetStub(int fallback_timeout = 0,
|
|
|
|
const grpc::string& expected_targets = "") {
|
|
|
|
ChannelArguments args;
|
|
|
|
// TODO(juanlishen): Add setter to ChannelArguments.
|
|
|
|
if (fallback_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_FALLBACK_TIMEOUT_MS, fallback_timeout);
|
|
|
|
}
|
|
|
|
args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
|
|
|
|
response_generator_.get());
|
|
|
|
if (!expected_targets.empty()) {
|
|
|
|
args.SetString(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS, expected_targets);
|
|
|
|
}
|
|
|
|
std::ostringstream uri;
|
|
|
|
uri << "fake:///" << kApplicationTargetName_;
|
|
|
|
// TODO(dgq): templatize tests to run everything using both secure and
|
|
|
|
// insecure channel credentials.
|
|
|
|
grpc_channel_credentials* channel_creds =
|
|
|
|
grpc_fake_transport_security_credentials_create();
|
|
|
|
grpc_call_credentials* call_creds = grpc_md_only_test_credentials_create(
|
|
|
|
g_kCallCredsMdKey, g_kCallCredsMdValue, false);
|
|
|
|
std::shared_ptr<ChannelCredentials> creds(
|
|
|
|
new SecureChannelCredentials(grpc_composite_channel_credentials_create(
|
|
|
|
channel_creds, call_creds, nullptr)));
|
|
|
|
call_creds->Unref();
|
|
|
|
channel_creds->Unref();
|
|
|
|
channel_ = ::grpc::CreateCustomChannel(uri.str(), creds, args);
|
|
|
|
stub_ = grpc::testing::EchoTestService::NewStub(channel_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ResetBackendCounters() {
|
|
|
|
for (auto& backend : backends_) backend->backend_service()->ResetCounters();
|
|
|
|
}
|
|
|
|
|
|
|
|
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]->backend_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]->backend_service()->request_count() == 0);
|
|
|
|
ResetBackendCounters();
|
|
|
|
}
|
|
|
|
|
|
|
|
grpc_core::ServerAddressList CreateLbAddressesFromPortList(
|
|
|
|
const std::vector<int>& ports) {
|
|
|
|
grpc_core::ServerAddressList addresses;
|
|
|
|
for (int port : ports) {
|
|
|
|
char* lb_uri_str;
|
|
|
|
gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", port);
|
|
|
|
grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
|
|
|
|
GPR_ASSERT(lb_uri != nullptr);
|
|
|
|
grpc_resolved_address address;
|
|
|
|
GPR_ASSERT(grpc_parse_uri(lb_uri, &address));
|
|
|
|
std::vector<grpc_arg> args_to_add;
|
|
|
|
grpc_channel_args* args = grpc_channel_args_copy_and_add(
|
|
|
|
nullptr, args_to_add.data(), args_to_add.size());
|
|
|
|
addresses.emplace_back(address.addr, address.len, args);
|
|
|
|
grpc_uri_destroy(lb_uri);
|
|
|
|
gpr_free(lb_uri_str);
|
|
|
|
}
|
|
|
|
return addresses;
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolution(const std::vector<int>& ports,
|
|
|
|
const char* service_config_json = nullptr,
|
|
|
|
grpc_core::FakeResolverResponseGenerator*
|
|
|
|
lb_channel_response_generator = nullptr) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateLbAddressesFromPortList(ports);
|
|
|
|
if (service_config_json != nullptr) {
|
|
|
|
grpc_error* error = GRPC_ERROR_NONE;
|
|
|
|
result.service_config =
|
|
|
|
grpc_core::ServiceConfig::Create(service_config_json, &error);
|
|
|
|
GRPC_ERROR_UNREF(error);
|
|
|
|
}
|
|
|
|
grpc_arg arg = grpc_core::FakeResolverResponseGenerator::MakeChannelArg(
|
|
|
|
lb_channel_response_generator == nullptr
|
|
|
|
? lb_channel_response_generator_.get()
|
|
|
|
: lb_channel_response_generator);
|
|
|
|
result.args = grpc_channel_args_copy_and_add(nullptr, &arg, 1);
|
|
|
|
response_generator_->SetResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolutionForLbChannelAllBalancers(
|
|
|
|
const char* service_config_json = nullptr,
|
|
|
|
grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator =
|
|
|
|
nullptr) {
|
|
|
|
std::vector<int> ports;
|
|
|
|
for (size_t i = 0; i < balancers_.size(); ++i) {
|
|
|
|
ports.emplace_back(balancers_[i]->port());
|
|
|
|
}
|
|
|
|
SetNextResolutionForLbChannel(ports, service_config_json,
|
|
|
|
lb_channel_response_generator);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolutionForLbChannel(
|
|
|
|
const std::vector<int>& ports, const char* service_config_json = nullptr,
|
|
|
|
grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator =
|
|
|
|
nullptr) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateLbAddressesFromPortList(ports);
|
|
|
|
if (service_config_json != nullptr) {
|
|
|
|
grpc_error* error = GRPC_ERROR_NONE;
|
|
|
|
result.service_config =
|
|
|
|
grpc_core::ServiceConfig::Create(service_config_json, &error);
|
|
|
|
GRPC_ERROR_UNREF(error);
|
|
|
|
}
|
|
|
|
if (lb_channel_response_generator == nullptr) {
|
|
|
|
lb_channel_response_generator = lb_channel_response_generator_.get();
|
|
|
|
}
|
|
|
|
lb_channel_response_generator->SetResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextReresolutionResponse(const std::vector<int>& ports) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateLbAddressesFromPortList(ports);
|
|
|
|
response_generator_->SetReresolutionResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
const std::vector<int> GetBackendPorts(size_t start_index = 0,
|
|
|
|
size_t stop_index = 0) const {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
std::vector<int> backend_ports;
|
|
|
|
for (size_t i = start_index; i < stop_index; ++i) {
|
|
|
|
backend_ports.push_back(backends_[i]->port());
|
|
|
|
}
|
|
|
|
return backend_ports;
|
|
|
|
}
|
|
|
|
|
|
|
|
const std::vector<std::vector<int>> GetBackendPortsInGroups(
|
|
|
|
size_t start_index = 0, size_t stop_index = 0,
|
|
|
|
size_t num_group = 1) const {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
size_t group_size = (stop_index - start_index) / num_group;
|
|
|
|
std::vector<std::vector<int>> backend_ports;
|
|
|
|
for (size_t i = 0; i < num_group; ++i) {
|
|
|
|
backend_ports.emplace_back();
|
|
|
|
size_t group_start = group_size * i + start_index;
|
|
|
|
size_t group_stop =
|
|
|
|
i == num_group - 1 ? stop_index : group_start + group_size;
|
|
|
|
for (size_t j = group_start; j < group_stop; ++j) {
|
|
|
|
backend_ports[i].push_back(backends_[j]->port());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return backend_ports;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ScheduleResponseForBalancer(size_t i, const DiscoveryResponse& response,
|
|
|
|
int delay_ms) {
|
|
|
|
balancers_[i]->eds_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());
|
|
|
|
}
|
|
|
|
|
|
|
|
class ServerThread {
|
|
|
|
public:
|
|
|
|
ServerThread() : port_(grpc_pick_unused_port_or_die()) {}
|
|
|
|
virtual ~ServerThread(){};
|
|
|
|
|
|
|
|
void Start(const grpc::string& server_host) {
|
|
|
|
gpr_log(GPR_INFO, "starting %s server on port %d", Type(), port_);
|
|
|
|
GPR_ASSERT(!running_);
|
|
|
|
running_ = true;
|
|
|
|
StartAllServices();
|
|
|
|
grpc_core::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_core::MutexLock lock(&mu);
|
|
|
|
grpc_core::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());
|
|
|
|
}
|
|
|
|
|
|
|
|
void Serve(const grpc::string& server_host, grpc_core::Mutex* mu,
|
|
|
|
grpc_core::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_core::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);
|
|
|
|
RegisterAllServices(&builder);
|
|
|
|
server_ = builder.BuildAndStart();
|
|
|
|
cond->Signal();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
if (!running_) return;
|
|
|
|
gpr_log(GPR_INFO, "%s about to shutdown", Type());
|
|
|
|
ShutdownAllServices();
|
|
|
|
server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0));
|
|
|
|
thread_->join();
|
|
|
|
gpr_log(GPR_INFO, "%s shutdown completed", Type());
|
|
|
|
running_ = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
int port() const { return port_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
virtual void RegisterAllServices(ServerBuilder* builder) = 0;
|
|
|
|
virtual void StartAllServices() = 0;
|
|
|
|
virtual void ShutdownAllServices() = 0;
|
|
|
|
|
|
|
|
virtual const char* Type() = 0;
|
|
|
|
|
|
|
|
const int port_;
|
|
|
|
std::unique_ptr<Server> server_;
|
|
|
|
std::unique_ptr<std::thread> thread_;
|
|
|
|
bool running_ = false;
|
|
|
|
};
|
|
|
|
|
|
|
|
class BackendServerThread : public ServerThread {
|
|
|
|
public:
|
|
|
|
BackendServiceImpl* backend_service() { return &backend_service_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
void RegisterAllServices(ServerBuilder* builder) override {
|
|
|
|
builder->RegisterService(&backend_service_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllServices() override { backend_service_.Start(); }
|
|
|
|
|
|
|
|
void ShutdownAllServices() override { backend_service_.Shutdown(); }
|
|
|
|
|
|
|
|
const char* Type() override { return "Backend"; }
|
|
|
|
|
|
|
|
BackendServiceImpl backend_service_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class BalancerServerThread : public ServerThread {
|
|
|
|
public:
|
|
|
|
explicit BalancerServerThread(int client_load_reporting_interval = 0)
|
|
|
|
: lrs_service_(client_load_reporting_interval) {}
|
|
|
|
|
|
|
|
EdsServiceImpl* eds_service() { return &eds_service_; }
|
|
|
|
LrsServiceImpl* lrs_service() { return &lrs_service_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
void RegisterAllServices(ServerBuilder* builder) override {
|
|
|
|
builder->RegisterService(&eds_service_);
|
|
|
|
builder->RegisterService(&lrs_service_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllServices() override {
|
|
|
|
eds_service_.Start();
|
|
|
|
lrs_service_.Start();
|
|
|
|
}
|
|
|
|
|
|
|
|
void ShutdownAllServices() override {
|
|
|
|
eds_service_.Shutdown();
|
|
|
|
lrs_service_.Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
const char* Type() override { return "Balancer"; }
|
|
|
|
|
|
|
|
EdsServiceImpl eds_service_;
|
|
|
|
LrsServiceImpl lrs_service_;
|
|
|
|
};
|
|
|
|
|
|
|
|
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<BackendServerThread>> backends_;
|
|
|
|
std::vector<std::unique_ptr<BalancerServerThread>> balancers_;
|
|
|
|
grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
|
|
|
|
response_generator_;
|
|
|
|
grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
|
|
|
|
lb_channel_response_generator_;
|
|
|
|
const grpc::string kRequestMessage_ = "Live long and prosper.";
|
|
|
|
const grpc::string kApplicationTargetName_ = "application_target_name";
|
|
|
|
const grpc::string kDefaultServiceConfig_ =
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"xds_experimental\":{ \"balancerName\": \"fake:///lb\" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}";
|
|
|
|
};
|
|
|
|
|
|
|
|
class SingleBalancerTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
SingleBalancerTest() : XdsEnd2endTest(4, 1, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(GetBackendPortsInGroups()),
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
balancers_[0]->eds_service()->NotifyDoneWithEdsCall();
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("xds_experimental", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SameBackendListedMultipleTimes) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Same backend listed twice.
|
|
|
|
std::vector<int> ports;
|
|
|
|
ports.push_back(backends_[0]->port());
|
|
|
|
ports.push_back(backends_[0]->port());
|
|
|
|
const size_t kNumRpcsPerAddress = 10;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::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]->backend_service()->request_count());
|
|
|
|
// And they should have come from a single client port, because of
|
|
|
|
// subchannel sharing.
|
|
|
|
EXPECT_EQ(1UL, backends_[0]->backend_service()->clients().size());
|
|
|
|
balancers_[0]->eds_service()->NotifyDoneWithEdsCall();
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SecureNaming) {
|
|
|
|
// TODO(juanlishen): Use separate fake creds for the balancer channel.
|
|
|
|
ResetStub(0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(GetBackendPortsInGroups()),
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, SecureNamingDeathTest) {
|
|
|
|
::testing::FLAGS_gtest_death_test_style = "threadsafe";
|
|
|
|
// Make sure that we blow up (via abort() from the security connector) when
|
|
|
|
// the name from the balancer doesn't match expectations.
|
|
|
|
ASSERT_DEATH_IF_SUPPORTED(
|
|
|
|
{
|
|
|
|
ResetStub(0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"xds_experimental\":{ \"balancerName\": "
|
|
|
|
"\"fake:///wrong_lb\" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}");
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
channel_->WaitForConnected(grpc_timeout_seconds_to_deadline(1));
|
|
|
|
},
|
|
|
|
"");
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, InitiallyEmptyServerlist) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const int kCallDeadlineMs = kServerlistDelayMs * 2;
|
|
|
|
// First response is an empty serverlist, sent right away.
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponseForBackends({{}}),
|
|
|
|
0);
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(GetBackendPortsInGroups()),
|
|
|
|
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]->eds_service()->NotifyDoneWithEdsCall();
|
|
|
|
// The EDS service got a single request.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
// and sent two responses.
|
|
|
|
EXPECT_EQ(2U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, AllServersUnreachableFailFast) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumUnreachableServers = 5;
|
|
|
|
std::vector<int> ports;
|
|
|
|
for (size_t i = 0; i < kNumUnreachableServers; ++i) {
|
|
|
|
ports.push_back(grpc_pick_unused_port_or_die());
|
|
|
|
}
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends({ports}), 0);
|
|
|
|
const Status status = SendRpc();
|
|
|
|
// The error shouldn't be DEADLINE_EXCEEDED.
|
|
|
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code());
|
|
|
|
balancers_[0]->eds_service()->NotifyDoneWithEdsCall();
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, Fallback) {
|
|
|
|
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);
|
|
|
|
SetNextResolution(GetBackendPorts(0, kNumBackendsInResolution),
|
|
|
|
kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPortsInGroups(kNumBackendsInResolution /* start_index */)),
|
|
|
|
kServerlistDelayMs);
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */, 0 /* start_index */,
|
|
|
|
kNumBackendsInResolution /* stop_index */);
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumBackendsInResolution /* start_index */);
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackUpdate) {
|
|
|
|
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);
|
|
|
|
SetNextResolution(GetBackendPorts(0, kNumBackendsInResolution),
|
|
|
|
kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(GetBackendPortsInGroups(
|
|
|
|
kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* start_index */)),
|
|
|
|
kServerlistDelayMs);
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */, 0 /* start_index */,
|
|
|
|
kNumBackendsInResolution /* stop_index */);
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
SetNextResolution(GetBackendPorts(kNumBackendsInResolution,
|
|
|
|
kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate),
|
|
|
|
kDefaultServiceConfig_.c_str());
|
|
|
|
// Wait until the resolution update has been processed and all the new
|
|
|
|
// fallback backends are reachable.
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumBackendsInResolution /* start_index */,
|
|
|
|
kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* stop_index */);
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
WaitForAllBackends(1 /* num_requests_multiple_of */,
|
|
|
|
kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* start_index */);
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackEarlyWhenBalancerChannelFails) {
|
|
|
|
const int kFallbackTimeoutMs = 10000 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({grpc_pick_unused_port_or_die()});
|
|
|
|
// 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 one balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Balancer drops call without sending a serverlist.
|
|
|
|
balancers_[0]->eds_service()->NotifyDoneWithEdsCall();
|
|
|
|
// 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, FallbackIfResponseReceivedButChildNotReady) {
|
|
|
|
const int kFallbackTimeoutMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution({backends_[0]->port()}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send a serverlist that only contains an unreachable backend before fallback
|
|
|
|
// timeout.
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(
|
|
|
|
{{grpc_pick_unused_port_or_die()}}),
|
|
|
|
0);
|
|
|
|
// Because no child policy is ready before fallback timeout, we enter fallback
|
|
|
|
// mode.
|
|
|
|
WaitForBackend(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackModeIsExitedWhenBalancerSaysToDropAllCalls) {
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({grpc_pick_unused_port_or_die()});
|
|
|
|
// Enter fallback mode because the LB channel fails to connect.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Return a new balancer that sends an empty serverlist.
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponseForBackends({{}}),
|
|
|
|
0);
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send RPCs until failure.
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(5000, GPR_TIMESPAN));
|
|
|
|
do {
|
|
|
|
auto status = SendRpc();
|
|
|
|
if (!status.ok()) break;
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, FallbackModeIsExitedAfterChildRready) {
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({grpc_pick_unused_port_or_die()});
|
|
|
|
// Enter fallback mode because the LB channel fails to connect.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Return a new balancer that sends a dead backend.
|
|
|
|
ShutdownBackend(1);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends({{backends_[1]->port()}}), 0);
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// The state (TRANSIENT_FAILURE) update from the child policy will be ignored
|
|
|
|
// because we are still in fallback mode.
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(5000, GPR_TIMESPAN));
|
|
|
|
// Send 5 seconds worth of RPCs.
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// After the backend is restarted, the child policy will eventually be READY,
|
|
|
|
// and we will exit fallback mode.
|
|
|
|
StartBackend(1);
|
|
|
|
WaitForBackend(1);
|
|
|
|
// We have exited fallback mode, so calls will go to the child policy
|
|
|
|
// exclusively.
|
|
|
|
CheckRpcSendOk(100);
|
|
|
|
EXPECT_EQ(0U, backends_[0]->backend_service()->request_count());
|
|
|
|
EXPECT_EQ(100U, backends_[1]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerTest, BackendsRestart) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(GetBackendPortsInGroups()),
|
|
|
|
0);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Stop backends. RPCs should fail.
|
|
|
|
ShutdownAllBackends();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
// Restart all backends. RPCs should start succeeding again.
|
|
|
|
StartAllBackends();
|
|
|
|
CheckRpcSendOk(1 /* times */, 2000 /* timeout_ms */,
|
|
|
|
true /* wait_for_ready */);
|
|
|
|
}
|
|
|
|
|
|
|
|
class UpdatesTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
UpdatesTest() : XdsEnd2endTest(4, 3, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersButKeepUsingOriginalBalancer) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
auto first_backend = GetBackendPortsInGroups(0, 1);
|
|
|
|
auto second_backend = GetBackendPortsInGroups(1, 2);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(first_backend), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, EdsServiceImpl::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]->backend_service()->request_count());
|
|
|
|
|
|
|
|
// The EDS service of balancer 0 got a single request, and sent a single
|
|
|
|
// response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel({balancers_[1]->port()});
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// The current LB call is still working, so xds continued using it to the
|
|
|
|
// first balancer, which doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancerName) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
auto first_backend = GetBackendPortsInGroups(0, 1);
|
|
|
|
auto second_backend = GetBackendPortsInGroups(1, 2);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(first_backend), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, EdsServiceImpl::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]->backend_service()->request_count());
|
|
|
|
|
|
|
|
// The EDS service of balancer 0 got a single request, and sent a single
|
|
|
|
// response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
|
|
|
|
std::vector<int> ports;
|
|
|
|
ports.emplace_back(balancers_[1]->port());
|
|
|
|
auto new_lb_channel_response_generator =
|
|
|
|
grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
|
|
|
|
SetNextResolutionForLbChannel(ports, nullptr,
|
|
|
|
new_lb_channel_response_generator.get());
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE BALANCER NAME ==========");
|
|
|
|
SetNextResolution({},
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"xds_experimental\":{ \"balancerName\": "
|
|
|
|
"\"fake:///updated_lb\" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}",
|
|
|
|
new_lb_channel_response_generator.get());
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATED BALANCER NAME ==========");
|
|
|
|
|
|
|
|
// Wait until update has been processed, as signaled by the second backend
|
|
|
|
// receiving a request.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
WaitForBackend(1);
|
|
|
|
|
|
|
|
backends_[1]->backend_service()->ResetCounters();
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the second backend.
|
|
|
|
EXPECT_EQ(10U, backends_[1]->backend_service()->request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send an update with the same set of LBs as the one in SetUp() in order to
|
|
|
|
// verify that the LB channel inside xds keeps the initial connection (which
|
|
|
|
// by definition is also present in the update).
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersRepeated) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
auto first_backend = GetBackendPortsInGroups(0, 1);
|
|
|
|
auto second_backend = GetBackendPortsInGroups(1, 2);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(first_backend), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, EdsServiceImpl::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]->backend_service()->request_count());
|
|
|
|
|
|
|
|
// The EDS service of balancer 0 got a single request, and sent a single
|
|
|
|
// response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
|
|
|
|
std::vector<int> ports;
|
|
|
|
ports.emplace_back(balancers_[0]->port());
|
|
|
|
ports.emplace_back(balancers_[1]->port());
|
|
|
|
ports.emplace_back(balancers_[2]->port());
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel(ports);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// xds continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
|
|
|
|
ports.clear();
|
|
|
|
ports.emplace_back(balancers_[0]->port());
|
|
|
|
ports.emplace_back(balancers_[1]->port());
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 2 ==========");
|
|
|
|
SetNextResolutionForLbChannel(ports);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 2 DONE ==========");
|
|
|
|
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// xds continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(UpdatesTest, UpdateBalancersDeadUpdate) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
auto first_backend = GetBackendPortsInGroups(0, 1);
|
|
|
|
auto second_backend = GetBackendPortsInGroups(1, 2);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0, EdsServiceImpl::BuildResponseForBackends(first_backend), 0);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
1, EdsServiceImpl::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]->backend_service()->request_count());
|
|
|
|
|
|
|
|
// Kill balancer 0
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BALANCER 0 *************");
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BALANCER 0 *************");
|
|
|
|
|
|
|
|
// This is serviced by the existing child policy.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should again have gone to the first backend.
|
|
|
|
EXPECT_EQ(20U, backends_[0]->backend_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
|
|
|
|
// The EDS service of balancer 0 got a single request, and sent a single
|
|
|
|
// response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[1]->eds_service()->response_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel({balancers_[1]->port()});
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
|
|
|
|
// Wait until update has been processed, as signaled by the second backend
|
|
|
|
// receiving a request. In the meantime, the client continues to be serviced
|
|
|
|
// (by the first backend) without interruption.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
WaitForBackend(1);
|
|
|
|
|
|
|
|
// This is serviced by the updated RR policy
|
|
|
|
backends_[1]->backend_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]->backend_service()->request_count());
|
|
|
|
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_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]->eds_service()->request_count(), 1U);
|
|
|
|
EXPECT_GE(balancers_[1]->eds_service()->response_count(), 1U);
|
|
|
|
EXPECT_LE(balancers_[1]->eds_service()->request_count(), 2U);
|
|
|
|
EXPECT_LE(balancers_[1]->eds_service()->response_count(), 2U);
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, balancers_[2]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// The re-resolution tests are deferred because they rely on the fallback mode,
|
|
|
|
// which hasn't been supported.
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_F(UpdatesTest, ReresolveDeadBackend).
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_F(UpdatesWithClientLoadReportingTest,
|
|
|
|
// ReresolveDeadBalancer)
|
|
|
|
|
|
|
|
// The drop tests are deferred because the drop handling hasn't been added yet.
|
|
|
|
|
|
|
|
// TODO(roth): Add TEST_F(SingleBalancerTest, Drop)
|
|
|
|
|
|
|
|
// TODO(roth): Add TEST_F(SingleBalancerTest, DropAllFirst)
|
|
|
|
|
|
|
|
// TODO(roth): Add TEST_F(SingleBalancerTest, DropAll)
|
|
|
|
|
|
|
|
class SingleBalancerWithClientLoadReportingTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
SingleBalancerWithClientLoadReportingTest() : XdsEnd2endTest(4, 1, 3) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerWithClientLoadReportingTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
// TODO(juanlishen): Partition the backends after multiple localities is
|
|
|
|
// tested.
|
|
|
|
ScheduleResponseForBalancer(0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPortsInGroups(0, backends_.size())),
|
|
|
|
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]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// The EDS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->eds_service()->response_count());
|
|
|
|
// The LRS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->lrs_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->lrs_service()->response_count());
|
|
|
|
// The load report received at the balancer should be correct.
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats->total_issued_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_F(SingleBalancerWithClientLoadReportingTest, BalancerRestart) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumBackendsFirstPass = backends_.size() / 2;
|
|
|
|
const size_t kNumBackendsSecondPass =
|
|
|
|
backends_.size() - kNumBackendsFirstPass;
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPortsInGroups(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);
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(static_cast<size_t>(num_ok),
|
|
|
|
client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
// Shut down the balancer.
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
// Send 1 more request per backend. This will continue using the
|
|
|
|
// last serverlist we received from the balancer before it was shut down.
|
|
|
|
ResetBackendCounters();
|
|
|
|
CheckRpcSendOk(kNumBackendsFirstPass);
|
|
|
|
int num_started = kNumBackendsFirstPass;
|
|
|
|
// Each backend should have gotten 1 request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsFirstPass; ++i) {
|
|
|
|
EXPECT_EQ(1UL, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Now restart the balancer, this time pointing to the new backends.
|
|
|
|
balancers_[0]->Start(server_host_);
|
|
|
|
ScheduleResponseForBalancer(
|
|
|
|
0,
|
|
|
|
EdsServiceImpl::BuildResponseForBackends(
|
|
|
|
GetBackendPortsInGroups(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.
|
|
|
|
std::tie(num_ok, num_failure, num_drops) =
|
|
|
|
WaitForAllBackends(/* num_requests_multiple_of */ 1,
|
|
|
|
/* start_index */ kNumBackendsFirstPass);
|
|
|
|
num_started += num_ok + num_failure + num_drops;
|
|
|
|
// Send one RPC per backend.
|
|
|
|
CheckRpcSendOk(kNumBackendsSecondPass);
|
|
|
|
num_started += kNumBackendsSecondPass;
|
|
|
|
// Check client stats.
|
|
|
|
client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(num_started, client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
}
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_F(SingleBalancerWithClientLoadReportingTest, Drop)
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
} // namespace testing
|
|
|
|
} // namespace grpc
|
|
|
|
|
|
|
|
int main(int argc, char** argv) {
|
|
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grpc::testing::TestEnvironment env(argc, argv);
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::testing::InitGoogleTest(&argc, argv);
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const auto result = RUN_ALL_TESTS();
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return result;
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}
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