|
|
|
/*
|
|
|
|
*
|
|
|
|
* Copyright 2017 gRPC authors.
|
|
|
|
*
|
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
* you may not use this file except in compliance with the License.
|
|
|
|
* You may obtain a copy of the License at
|
|
|
|
*
|
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
*
|
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
* See the License for the specific language governing permissions and
|
|
|
|
* limitations under the License.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <memory>
|
|
|
|
#include <mutex>
|
|
|
|
#include <numeric>
|
|
|
|
#include <set>
|
|
|
|
#include <sstream>
|
|
|
|
#include <thread>
|
|
|
|
|
|
|
|
#include <grpc/grpc.h>
|
|
|
|
#include <grpc/support/alloc.h>
|
|
|
|
#include <grpc/support/log.h>
|
|
|
|
#include <grpc/support/string_util.h>
|
|
|
|
#include <grpc/support/time.h>
|
|
|
|
#include <grpcpp/channel.h>
|
|
|
|
#include <grpcpp/client_context.h>
|
|
|
|
#include <grpcpp/create_channel.h>
|
|
|
|
#include <grpcpp/server.h>
|
|
|
|
#include <grpcpp/server_builder.h>
|
|
|
|
|
|
|
|
#include "src/core/ext/filters/client_channel/backup_poller.h"
|
|
|
|
#include "src/core/ext/filters/client_channel/parse_address.h"
|
|
|
|
#include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h"
|
|
|
|
#include "src/core/ext/filters/client_channel/server_address.h"
|
|
|
|
#include "src/core/lib/gpr/env.h"
|
|
|
|
#include "src/core/lib/gprpp/map.h"
|
|
|
|
#include "src/core/lib/gprpp/ref_counted_ptr.h"
|
|
|
|
#include "src/core/lib/gprpp/sync.h"
|
|
|
|
#include "src/core/lib/iomgr/sockaddr.h"
|
|
|
|
#include "src/core/lib/security/credentials/fake/fake_credentials.h"
|
|
|
|
#include "src/cpp/client/secure_credentials.h"
|
|
|
|
#include "src/cpp/server/secure_server_credentials.h"
|
|
|
|
|
|
|
|
#include "test/core/util/port.h"
|
|
|
|
#include "test/core/util/test_config.h"
|
|
|
|
#include "test/cpp/end2end/test_service_impl.h"
|
|
|
|
|
|
|
|
#include "src/proto/grpc/testing/echo.grpc.pb.h"
|
|
|
|
#include "src/proto/grpc/testing/xds/eds_for_test.grpc.pb.h"
|
|
|
|
#include "src/proto/grpc/testing/xds/lrs_for_test.grpc.pb.h"
|
|
|
|
|
|
|
|
#include <gmock/gmock.h>
|
|
|
|
#include <gtest/gtest.h>
|
|
|
|
|
|
|
|
// TODO(dgq): Other scenarios in need of testing:
|
|
|
|
// - Send a serverlist with faulty ip:port addresses (port > 2^16, etc).
|
|
|
|
// - Test reception of invalid serverlist
|
|
|
|
// - Test against a non-LB server.
|
|
|
|
// - Random LB server closing the stream unexpectedly.
|
|
|
|
//
|
|
|
|
// Findings from end to end testing to be covered here:
|
|
|
|
// - Handling of LB servers restart, including reconnection after backing-off
|
|
|
|
// retries.
|
|
|
|
// - Destruction of load balanced channel (and therefore of xds instance)
|
|
|
|
// while:
|
|
|
|
// 1) the internal LB call is still active. This should work by virtue
|
|
|
|
// of the weak reference the LB call holds. The call should be terminated as
|
|
|
|
// part of the xds shutdown process.
|
|
|
|
// 2) the retry timer is active. Again, the weak reference it holds should
|
|
|
|
// prevent a premature call to \a glb_destroy.
|
|
|
|
|
|
|
|
namespace grpc {
|
|
|
|
namespace testing {
|
|
|
|
namespace {
|
|
|
|
|
|
|
|
using std::chrono::system_clock;
|
|
|
|
|
|
|
|
using ::envoy::api::v2::ClusterLoadAssignment;
|
|
|
|
using ::envoy::api::v2::DiscoveryRequest;
|
|
|
|
using ::envoy::api::v2::DiscoveryResponse;
|
|
|
|
using ::envoy::api::v2::EndpointDiscoveryService;
|
|
|
|
using ::envoy::api::v2::FractionalPercent;
|
|
|
|
using ::envoy::service::load_stats::v2::ClusterStats;
|
|
|
|
using ::envoy::service::load_stats::v2::LoadReportingService;
|
|
|
|
using ::envoy::service::load_stats::v2::LoadStatsRequest;
|
|
|
|
using ::envoy::service::load_stats::v2::LoadStatsResponse;
|
|
|
|
using ::envoy::service::load_stats::v2::UpstreamLocalityStats;
|
|
|
|
|
|
|
|
constexpr char kEdsTypeUrl[] =
|
|
|
|
"type.googleapis.com/envoy.api.v2.ClusterLoadAssignment";
|
|
|
|
constexpr char kDefaultLocalityRegion[] = "xds_default_locality_region";
|
|
|
|
constexpr char kDefaultLocalityZone[] = "xds_default_locality_zone";
|
|
|
|
constexpr char kLbDropType[] = "lb";
|
|
|
|
constexpr char kThrottleDropType[] = "throttle";
|
|
|
|
constexpr int kDefaultLocalityWeight = 3;
|
|
|
|
constexpr int kDefaultLocalityPriority = 0;
|
|
|
|
|
|
|
|
template <typename ServiceType>
|
|
|
|
class CountedService : public ServiceType {
|
|
|
|
public:
|
|
|
|
size_t request_count() {
|
|
|
|
grpc_core::MutexLock lock(&mu_);
|
|
|
|
return request_count_;
|
|
|
|
}
|
|
|
|
|
|
|
|
size_t response_count() {
|
|
|
|
grpc_core::MutexLock lock(&mu_);
|
|
|
|
return response_count_;
|
|
|
|
}
|
|
|
|
|
|
|
|
void IncreaseResponseCount() {
|
|
|
|
grpc_core::MutexLock lock(&mu_);
|
|
|
|
++response_count_;
|
|
|
|
}
|
|
|
|
void IncreaseRequestCount() {
|
|
|
|
grpc_core::MutexLock lock(&mu_);
|
|
|
|
++request_count_;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ResetCounters() {
|
|
|
|
grpc_core::MutexLock lock(&mu_);
|
|
|
|
request_count_ = 0;
|
|
|
|
response_count_ = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
|
|
grpc_core::Mutex mu_;
|
|
|
|
|
|
|
|
private:
|
|
|
|
size_t request_count_ = 0;
|
|
|
|
size_t response_count_ = 0;
|
|
|
|
};
|
|
|
|
|
|
|
|
using BackendService = CountedService<TestServiceImpl>;
|
|
|
|
using EdsService = CountedService<EndpointDiscoveryService::Service>;
|
|
|
|
using LrsService = CountedService<LoadReportingService::Service>;
|
|
|
|
|
|
|
|
const char g_kCallCredsMdKey[] = "Balancer should not ...";
|
|
|
|
const char g_kCallCredsMdValue[] = "... receive me";
|
|
|
|
|
|
|
|
class BackendServiceImpl : public BackendService {
|
|
|
|
public:
|
|
|
|
BackendServiceImpl() {}
|
|
|
|
|
|
|
|
Status Echo(ServerContext* context, const EchoRequest* request,
|
|
|
|
EchoResponse* response) override {
|
|
|
|
// Backend should receive the call credentials metadata.
|
|
|
|
auto call_credentials_entry =
|
|
|
|
context->client_metadata().find(g_kCallCredsMdKey);
|
|
|
|
EXPECT_NE(call_credentials_entry, context->client_metadata().end());
|
|
|
|
if (call_credentials_entry != context->client_metadata().end()) {
|
|
|
|
EXPECT_EQ(call_credentials_entry->second, g_kCallCredsMdValue);
|
|
|
|
}
|
|
|
|
IncreaseRequestCount();
|
|
|
|
const auto status = TestServiceImpl::Echo(context, request, response);
|
|
|
|
IncreaseResponseCount();
|
|
|
|
AddClient(context->peer());
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Start() {}
|
|
|
|
void Shutdown() {}
|
|
|
|
|
|
|
|
std::set<grpc::string> clients() {
|
|
|
|
grpc_core::MutexLock lock(&clients_mu_);
|
|
|
|
return clients_;
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
void AddClient(const grpc::string& client) {
|
|
|
|
grpc_core::MutexLock lock(&clients_mu_);
|
|
|
|
clients_.insert(client);
|
|
|
|
}
|
|
|
|
|
|
|
|
grpc_core::Mutex mu_;
|
|
|
|
grpc_core::Mutex clients_mu_;
|
|
|
|
std::set<grpc::string> clients_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class ClientStats {
|
|
|
|
public:
|
|
|
|
struct LocalityStats {
|
|
|
|
// Converts from proto message class.
|
|
|
|
LocalityStats(const UpstreamLocalityStats& upstream_locality_stats)
|
|
|
|
: total_successful_requests(
|
|
|
|
upstream_locality_stats.total_successful_requests()),
|
|
|
|
total_requests_in_progress(
|
|
|
|
upstream_locality_stats.total_requests_in_progress()),
|
|
|
|
total_error_requests(upstream_locality_stats.total_error_requests()),
|
|
|
|
total_issued_requests(
|
|
|
|
upstream_locality_stats.total_issued_requests()) {}
|
|
|
|
|
|
|
|
uint64_t total_successful_requests;
|
|
|
|
uint64_t total_requests_in_progress;
|
|
|
|
uint64_t total_error_requests;
|
|
|
|
uint64_t total_issued_requests;
|
|
|
|
};
|
|
|
|
|
|
|
|
// Converts from proto message class.
|
|
|
|
ClientStats(const ClusterStats& cluster_stats)
|
|
|
|
: total_dropped_requests_(cluster_stats.total_dropped_requests()) {
|
|
|
|
for (const auto& input_locality_stats :
|
|
|
|
cluster_stats.upstream_locality_stats()) {
|
|
|
|
locality_stats_.emplace(input_locality_stats.locality().sub_zone(),
|
|
|
|
LocalityStats(input_locality_stats));
|
|
|
|
}
|
|
|
|
for (const auto& input_dropped_requests :
|
|
|
|
cluster_stats.dropped_requests()) {
|
|
|
|
dropped_requests_.emplace(input_dropped_requests.category(),
|
|
|
|
input_dropped_requests.dropped_count());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t total_successful_requests() const {
|
|
|
|
uint64_t sum = 0;
|
|
|
|
for (auto& p : locality_stats_) {
|
|
|
|
sum += p.second.total_successful_requests;
|
|
|
|
}
|
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
uint64_t total_requests_in_progress() const {
|
|
|
|
uint64_t sum = 0;
|
|
|
|
for (auto& p : locality_stats_) {
|
|
|
|
sum += p.second.total_requests_in_progress;
|
|
|
|
}
|
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
uint64_t total_error_requests() const {
|
|
|
|
uint64_t sum = 0;
|
|
|
|
for (auto& p : locality_stats_) {
|
|
|
|
sum += p.second.total_error_requests;
|
|
|
|
}
|
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
uint64_t total_issued_requests() const {
|
|
|
|
uint64_t sum = 0;
|
|
|
|
for (auto& p : locality_stats_) {
|
|
|
|
sum += p.second.total_issued_requests;
|
|
|
|
}
|
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
uint64_t total_dropped_requests() const { return total_dropped_requests_; }
|
|
|
|
uint64_t dropped_requests(const grpc::string& category) const {
|
|
|
|
auto iter = dropped_requests_.find(category);
|
|
|
|
GPR_ASSERT(iter != dropped_requests_.end());
|
|
|
|
return iter->second;
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
std::map<grpc::string, LocalityStats> locality_stats_;
|
|
|
|
uint64_t total_dropped_requests_;
|
|
|
|
std::map<grpc::string, uint64_t> dropped_requests_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class EdsServiceImpl : public EdsService {
|
|
|
|
public:
|
|
|
|
struct ResponseArgs {
|
|
|
|
struct Locality {
|
|
|
|
Locality(const grpc::string& sub_zone, std::vector<int> ports,
|
|
|
|
int lb_weight = kDefaultLocalityWeight,
|
|
|
|
int priority = kDefaultLocalityPriority)
|
|
|
|
: sub_zone(std::move(sub_zone)),
|
|
|
|
ports(std::move(ports)),
|
|
|
|
lb_weight(lb_weight),
|
|
|
|
priority(priority) {}
|
|
|
|
|
|
|
|
const grpc::string sub_zone;
|
|
|
|
std::vector<int> ports;
|
|
|
|
int lb_weight;
|
|
|
|
int priority;
|
|
|
|
};
|
|
|
|
|
|
|
|
ResponseArgs() = default;
|
|
|
|
explicit ResponseArgs(std::vector<Locality> locality_list)
|
|
|
|
: locality_list(std::move(locality_list)) {}
|
|
|
|
|
|
|
|
std::vector<Locality> locality_list;
|
|
|
|
std::map<grpc::string, uint32_t> drop_categories;
|
|
|
|
FractionalPercent::DenominatorType drop_denominator =
|
|
|
|
FractionalPercent::MILLION;
|
|
|
|
};
|
|
|
|
|
|
|
|
using Stream = ServerReaderWriter<DiscoveryResponse, DiscoveryRequest>;
|
|
|
|
using ResponseDelayPair = std::pair<DiscoveryResponse, int>;
|
|
|
|
|
|
|
|
Status StreamEndpoints(ServerContext* context, Stream* stream) override {
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: EDS StreamEndpoints starts", this);
|
|
|
|
[&]() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
if (eds_done_) return;
|
|
|
|
}
|
|
|
|
// Balancer shouldn't receive the call credentials metadata.
|
|
|
|
EXPECT_EQ(context->client_metadata().find(g_kCallCredsMdKey),
|
|
|
|
context->client_metadata().end());
|
|
|
|
// Read request.
|
|
|
|
DiscoveryRequest request;
|
|
|
|
if (!stream->Read(&request)) return;
|
|
|
|
IncreaseRequestCount();
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: received initial message '%s'", this,
|
|
|
|
request.DebugString().c_str());
|
|
|
|
// Send response.
|
|
|
|
std::vector<ResponseDelayPair> responses_and_delays;
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
responses_and_delays = responses_and_delays_;
|
|
|
|
}
|
|
|
|
for (const auto& response_and_delay : responses_and_delays) {
|
|
|
|
SendResponse(stream, response_and_delay.first,
|
|
|
|
response_and_delay.second);
|
|
|
|
}
|
|
|
|
// Wait until notified done.
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
eds_cond_.WaitUntil(&eds_mu_, [this] { return eds_done_; });
|
|
|
|
}();
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: EDS StreamEndpoints done", this);
|
|
|
|
return Status::OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
void add_response(const DiscoveryResponse& response, int send_after_ms) {
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
responses_and_delays_.push_back(std::make_pair(response, send_after_ms));
|
|
|
|
}
|
|
|
|
|
|
|
|
void Start() {
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
eds_done_ = false;
|
|
|
|
responses_and_delays_.clear();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
NotifyDoneWithEdsCallLocked();
|
|
|
|
responses_and_delays_.clear();
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: shut down", this);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DiscoveryResponse BuildResponse(const ResponseArgs& args) {
|
|
|
|
ClusterLoadAssignment assignment;
|
|
|
|
assignment.set_cluster_name("service name");
|
|
|
|
for (const auto& locality : args.locality_list) {
|
|
|
|
auto* endpoints = assignment.add_endpoints();
|
|
|
|
endpoints->mutable_load_balancing_weight()->set_value(locality.lb_weight);
|
|
|
|
endpoints->set_priority(locality.priority);
|
|
|
|
endpoints->mutable_locality()->set_region(kDefaultLocalityRegion);
|
|
|
|
endpoints->mutable_locality()->set_zone(kDefaultLocalityZone);
|
|
|
|
endpoints->mutable_locality()->set_sub_zone(locality.sub_zone);
|
|
|
|
for (const int& port : locality.ports) {
|
|
|
|
auto* lb_endpoints = endpoints->add_lb_endpoints();
|
|
|
|
auto* endpoint = lb_endpoints->mutable_endpoint();
|
|
|
|
auto* address = endpoint->mutable_address();
|
|
|
|
auto* socket_address = address->mutable_socket_address();
|
|
|
|
socket_address->set_address("127.0.0.1");
|
|
|
|
socket_address->set_port_value(port);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!args.drop_categories.empty()) {
|
|
|
|
auto* policy = assignment.mutable_policy();
|
|
|
|
for (const auto& p : args.drop_categories) {
|
|
|
|
const grpc::string& name = p.first;
|
|
|
|
const uint32_t parts_per_million = p.second;
|
|
|
|
auto* drop_overload = policy->add_drop_overloads();
|
|
|
|
drop_overload->set_category(name);
|
|
|
|
auto* drop_percentage = drop_overload->mutable_drop_percentage();
|
|
|
|
drop_percentage->set_numerator(parts_per_million);
|
|
|
|
drop_percentage->set_denominator(args.drop_denominator);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
DiscoveryResponse response;
|
|
|
|
response.set_type_url(kEdsTypeUrl);
|
|
|
|
response.add_resources()->PackFrom(assignment);
|
|
|
|
return response;
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithEdsCall() {
|
|
|
|
grpc_core::MutexLock lock(&eds_mu_);
|
|
|
|
NotifyDoneWithEdsCallLocked();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithEdsCallLocked() {
|
|
|
|
if (!eds_done_) {
|
|
|
|
eds_done_ = true;
|
|
|
|
eds_cond_.Broadcast();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
void SendResponse(Stream* stream, const DiscoveryResponse& response,
|
|
|
|
int delay_ms) {
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: sleeping for %d ms...", this, delay_ms);
|
|
|
|
if (delay_ms > 0) {
|
|
|
|
gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(delay_ms));
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LB[%p]: Woke up! Sending response '%s'", this,
|
|
|
|
response.DebugString().c_str());
|
|
|
|
IncreaseResponseCount();
|
|
|
|
stream->Write(response);
|
|
|
|
}
|
|
|
|
|
|
|
|
grpc_core::CondVar eds_cond_;
|
|
|
|
// 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);
|
|
|
|
#if TARGET_OS_IPHONE
|
|
|
|
// Workaround Apple CFStream bug
|
|
|
|
gpr_setenv("grpc_cfstream", "0");
|
|
|
|
#endif
|
|
|
|
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, int failover_timeout = 0,
|
|
|
|
const grpc::string& expected_targets = "",
|
|
|
|
grpc::string scheme = "") {
|
|
|
|
ChannelArguments args;
|
|
|
|
// TODO(juanlishen): Add setter to ChannelArguments.
|
|
|
|
if (fallback_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_FALLBACK_TIMEOUT_MS, fallback_timeout);
|
|
|
|
}
|
|
|
|
if (failover_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_FAILOVER_TIMEOUT_MS, failover_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);
|
|
|
|
}
|
|
|
|
if (scheme.empty()) scheme = "fake";
|
|
|
|
std::ostringstream uri;
|
|
|
|
uri << scheme << ":///" << 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, bool reset_counters = true) {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"========= WAITING FOR BACKEND %lu ==========", backend_idx);
|
|
|
|
do {
|
|
|
|
(void)SendRpc();
|
|
|
|
} while (backends_[backend_idx]->backend_service()->request_count() == 0);
|
|
|
|
if (reset_counters) ResetBackendCounters();
|
|
|
|
gpr_log(GPR_INFO, "========= BACKEND %lu READY ==========", backend_idx);
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
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 XdsResolverTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
XdsResolverTest() : XdsEnd2endTest(0, 0, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that if the "xds-experimental" scheme is used, xDS resolver will be
|
|
|
|
// used.
|
|
|
|
TEST_F(XdsResolverTest, XdsResolverIsUsed) {
|
|
|
|
// Use xds-experimental scheme in URI.
|
|
|
|
ResetStub(0, 0, "", "xds-experimental");
|
|
|
|
// Send an RPC to trigger resolution.
|
|
|
|
auto unused_result = SendRpc();
|
|
|
|
// Xds resolver returns xds_experimental as the LB policy.
|
|
|
|
EXPECT_EQ("xds_experimental", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
class BasicTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
BasicTest() : XdsEnd2endTest(4, 1, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the balancer sends the correct response to the client, and the
|
|
|
|
// client sends RPCs to the backends using the default child policy.
|
|
|
|
TEST_F(BasicTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ("xds_experimental", channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that subchannel sharing works when the same backend is listed multiple
|
|
|
|
// times.
|
|
|
|
TEST_F(BasicTest, SameBackendListedMultipleTimes) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Same backend listed twice.
|
|
|
|
std::vector<int> ports(2, backends_[0]->port());
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", ports},
|
|
|
|
});
|
|
|
|
const size_t kNumRpcsPerAddress = 10;
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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 * ports.size(),
|
|
|
|
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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs will be blocked until a non-empty serverlist is received.
|
|
|
|
TEST_F(BasicTest, 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.
|
|
|
|
EdsServiceImpl::ResponseArgs::Locality empty_locality("locality0", {});
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
empty_locality,
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args),
|
|
|
|
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);
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs will fail with UNAVAILABLE instead of DEADLINE_EXCEEDED if
|
|
|
|
// all the servers are unreachable.
|
|
|
|
TEST_F(BasicTest, 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());
|
|
|
|
}
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", ports},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
const Status status = SendRpc();
|
|
|
|
// The error shouldn't be DEADLINE_EXCEEDED.
|
|
|
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code());
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs fail when the backends are down, and will succeed again after
|
|
|
|
// the backends are restarted.
|
|
|
|
TEST_F(BasicTest, BackendsRestart) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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 */);
|
|
|
|
}
|
|
|
|
|
|
|
|
using SecureNamingTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that secure naming check passes if target name is expected.
|
|
|
|
TEST_F(SecureNamingTest, TargetNameIsExpected) {
|
|
|
|
// TODO(juanlishen): Use separate fake creds for the balancer channel.
|
|
|
|
ResetStub(0, 0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that secure naming check fails if target name is unexpected.
|
|
|
|
TEST_F(SecureNamingTest, TargetNameIsUnexpected) {
|
|
|
|
::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, 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));
|
|
|
|
},
|
|
|
|
"");
|
|
|
|
}
|
|
|
|
|
|
|
|
using LocalityMapTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that the localities in a locality map are picked according to their
|
|
|
|
// weights.
|
|
|
|
TEST_F(LocalityMapTest, WeightedRoundRobin) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const int kLocalityWeight0 = 2;
|
|
|
|
const int kLocalityWeight1 = 8;
|
|
|
|
const int kTotalLocalityWeight = kLocalityWeight0 + kLocalityWeight1;
|
|
|
|
const double kLocalityWeightRate0 =
|
|
|
|
static_cast<double>(kLocalityWeight0) / kTotalLocalityWeight;
|
|
|
|
const double kLocalityWeightRate1 =
|
|
|
|
static_cast<double>(kLocalityWeight1) / kTotalLocalityWeight;
|
|
|
|
// EDS response contains 2 localities, each of which contains 1 backend.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kLocalityWeight0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kLocalityWeight1},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// Wait for both backends to be ready.
|
|
|
|
WaitForAllBackends(1, 0, 2);
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
// The locality picking rates should be roughly equal to the expectation.
|
|
|
|
const double locality_picked_rate_0 =
|
|
|
|
static_cast<double>(backends_[0]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs;
|
|
|
|
const double locality_picked_rate_1 =
|
|
|
|
static_cast<double>(backends_[1]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(locality_picked_rate_0,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(kLocalityWeightRate0 * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kLocalityWeightRate0 * (1 + kErrorTolerance))));
|
|
|
|
EXPECT_THAT(locality_picked_rate_1,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(kLocalityWeightRate1 * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kLocalityWeightRate1 * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the locality map can work properly even when it contains a large
|
|
|
|
// number of localities.
|
|
|
|
TEST_F(LocalityMapTest, StressTest) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumLocalities = 100;
|
|
|
|
// The first EDS response contains kNumLocalities localities, each of which
|
|
|
|
// contains backend 0.
|
|
|
|
EdsServiceImpl::ResponseArgs args;
|
|
|
|
for (size_t i = 0; i < kNumLocalities; ++i) {
|
|
|
|
grpc::string name = "locality" + std::to_string(i);
|
|
|
|
EdsServiceImpl::ResponseArgs::Locality locality(name,
|
|
|
|
{backends_[0]->port()});
|
|
|
|
args.locality_list.emplace_back(std::move(locality));
|
|
|
|
}
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// The second EDS response contains 1 locality, which contains backend 1.
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", GetBackendPorts(1, 2)},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args),
|
|
|
|
60 * 1000);
|
|
|
|
// Wait until backend 0 is ready, before which kNumLocalities localities are
|
|
|
|
// received and handled by the xds policy.
|
|
|
|
WaitForBackend(0, /*reset_counters=*/false);
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
// Wait until backend 1 is ready, before which kNumLocalities localities are
|
|
|
|
// removed by the xds policy.
|
|
|
|
WaitForBackend(1);
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the localities in a locality map are picked correctly after update
|
|
|
|
// (addition, modification, deletion).
|
|
|
|
TEST_F(LocalityMapTest, UpdateMap) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 1000;
|
|
|
|
// The locality weight for the first 3 localities.
|
|
|
|
const std::vector<int> kLocalityWeights0 = {2, 3, 4};
|
|
|
|
const double kTotalLocalityWeight0 =
|
|
|
|
std::accumulate(kLocalityWeights0.begin(), kLocalityWeights0.end(), 0);
|
|
|
|
std::vector<double> locality_weight_rate_0;
|
|
|
|
for (int weight : kLocalityWeights0) {
|
|
|
|
locality_weight_rate_0.push_back(weight / kTotalLocalityWeight0);
|
|
|
|
}
|
|
|
|
// Delete the first locality, keep the second locality, change the third
|
|
|
|
// locality's weight from 4 to 2, and add a new locality with weight 6.
|
|
|
|
const std::vector<int> kLocalityWeights1 = {3, 2, 6};
|
|
|
|
const double kTotalLocalityWeight1 =
|
|
|
|
std::accumulate(kLocalityWeights1.begin(), kLocalityWeights1.end(), 0);
|
|
|
|
std::vector<double> locality_weight_rate_1 = {
|
|
|
|
0 /* placeholder for locality 0 */};
|
|
|
|
for (int weight : kLocalityWeights1) {
|
|
|
|
locality_weight_rate_1.push_back(weight / kTotalLocalityWeight1);
|
|
|
|
}
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), 2},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), 3},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), 4},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality1", GetBackendPorts(1, 2), 3},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), 2},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), 6},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 5000);
|
|
|
|
// Wait for the first 3 backends to be ready.
|
|
|
|
WaitForAllBackends(1, 0, 3);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// The picking rates of the first 3 backends should be roughly equal to the
|
|
|
|
// expectation.
|
|
|
|
std::vector<double> locality_picked_rates;
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
locality_picked_rates.push_back(
|
|
|
|
static_cast<double>(backends_[i]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs);
|
|
|
|
}
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_THAT(
|
|
|
|
locality_picked_rates[i],
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(locality_weight_rate_0[i] * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(locality_weight_rate_0[i] * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
// Backend 3 hasn't received any request.
|
|
|
|
EXPECT_EQ(0U, backends_[3]->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());
|
|
|
|
// Wait until the locality update has been processed, as signaled by backend 3
|
|
|
|
// receiving a request.
|
|
|
|
WaitForBackend(3);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// Backend 0 no longer receives any request.
|
|
|
|
EXPECT_EQ(0U, backends_[0]->backend_service()->request_count());
|
|
|
|
// The picking rates of the last 3 backends should be roughly equal to the
|
|
|
|
// expectation.
|
|
|
|
locality_picked_rates = {0 /* placeholder for backend 0 */};
|
|
|
|
for (size_t i = 1; i < 4; ++i) {
|
|
|
|
locality_picked_rates.push_back(
|
|
|
|
static_cast<double>(backends_[i]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs);
|
|
|
|
}
|
|
|
|
for (size_t i = 1; i < 4; ++i) {
|
|
|
|
EXPECT_THAT(
|
|
|
|
locality_picked_rates[i],
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(locality_weight_rate_1[i] * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(locality_weight_rate_1[i] * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
class FailoverTest : public BasicTest {
|
|
|
|
public:
|
|
|
|
FailoverTest() { ResetStub(0, 100, "", ""); }
|
|
|
|
};
|
|
|
|
|
|
|
|
// Localities with the highest priority are used when multiple priority exist.
|
|
|
|
TEST_F(FailoverTest, ChooseHighestPriority) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForBackend(3, false);
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_EQ(0, 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// If the higher priority localities are not reachable, failover to the highest
|
|
|
|
// priority among the rest.
|
|
|
|
TEST_F(FailoverTest, Failover) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ShutdownBackend(3);
|
|
|
|
ShutdownBackend(0);
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForBackend(1, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 1) continue;
|
|
|
|
EXPECT_EQ(0, 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// If a locality with higher priority than the current one becomes ready,
|
|
|
|
// switch to it.
|
|
|
|
TEST_F(FailoverTest, SwitchBackToHigherPriority) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 100;
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ShutdownBackend(3);
|
|
|
|
ShutdownBackend(0);
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForBackend(1, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 1) continue;
|
|
|
|
EXPECT_EQ(0, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
StartBackend(0);
|
|
|
|
WaitForBackend(0);
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
EXPECT_EQ(kNumRpcs, backends_[0]->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 first update only contains unavailable priorities. The second update
|
|
|
|
// contains available priorities.
|
|
|
|
TEST_F(FailoverTest, UpdateInitialUnavailable) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 1},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 3},
|
|
|
|
});
|
|
|
|
ShutdownBackend(0);
|
|
|
|
ShutdownBackend(1);
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 1000);
|
|
|
|
gpr_timespec deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(500, GPR_TIMESPAN));
|
|
|
|
// Send 0.5 second worth of RPCs.
|
|
|
|
do {
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
WaitForBackend(2, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 2) continue;
|
|
|
|
EXPECT_EQ(0, 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(2U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that after the localities' priorities are updated, we still choose the
|
|
|
|
// highest READY priority with the updated localities.
|
|
|
|
TEST_F(FailoverTest, UpdatePriority) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 100;
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 3},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 1000);
|
|
|
|
WaitForBackend(3, false);
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_EQ(0, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
WaitForBackend(1);
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
EXPECT_EQ(kNumRpcs, backends_[1]->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(2U, balancers_[0]->eds_service()->response_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
using DropTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that RPCs are dropped according to the drop config.
|
|
|
|
TEST_F(DropTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The EDS response contains two drop categories.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop config is converted correctly from per hundred.
|
|
|
|
TEST_F(DropTest, DropPerHundred) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerHundredForLb = 10;
|
|
|
|
const double kDropRateForLb = kDropPerHundredForLb / 100.0;
|
|
|
|
// The EDS response contains one drop category.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerHundredForLb}};
|
|
|
|
args.drop_denominator = FractionalPercent::HUNDRED;
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop config is converted correctly from per ten thousand.
|
|
|
|
TEST_F(DropTest, DropPerTenThousand) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerTenThousandForLb = 1000;
|
|
|
|
const double kDropRateForLb = kDropPerTenThousandForLb / 10000.0;
|
|
|
|
// The EDS response contains one drop category.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerTenThousandForLb}};
|
|
|
|
args.drop_denominator = FractionalPercent::TEN_THOUSAND;
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop is working correctly after update.
|
|
|
|
TEST_F(DropTest, Update) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The first EDS response contains one drop category.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// The second EDS response contains two drop categories.
|
|
|
|
// TODO(juanlishen): Change the EDS response sending to deterministic style
|
|
|
|
// (e.g., by using condition variable) so that we can shorten the test
|
|
|
|
// duration.
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 10000);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
// Wait until the drop rate increases to the middle of the two configs, which
|
|
|
|
// implies that the update has been in effect.
|
|
|
|
const double kDropRateThreshold =
|
|
|
|
(kDropRateForLb + KDropRateForLbAndThrottle) / 2;
|
|
|
|
size_t num_rpcs = kNumRpcs;
|
|
|
|
while (seen_drop_rate < kDropRateThreshold) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
++num_rpcs;
|
|
|
|
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_);
|
|
|
|
}
|
|
|
|
seen_drop_rate = static_cast<double>(num_drops) / num_rpcs;
|
|
|
|
}
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
num_drops = 0;
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// The new drop rate should be roughly equal to the expectation.
|
|
|
|
seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that all the RPCs are dropped if any drop category drops 100%.
|
|
|
|
TEST_F(DropTest, DropAll) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 1000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 1000000;
|
|
|
|
// The EDS response contains two drop categories.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// Send kNumRpcs RPCs and all of them are dropped.
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
EXPECT_TRUE(!status.ok() && status.error_message() ==
|
|
|
|
"Call dropped by load balancing policy");
|
|
|
|
}
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
using FallbackTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that RPCs are handled by the fallback backends before the serverlist is
|
|
|
|
// received, but will be handled by the serverlist after it's received.
|
|
|
|
TEST_F(FallbackTest, Vanilla) {
|
|
|
|
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.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsInResolution)},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args),
|
|
|
|
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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs are handled by the updated fallback backends before
|
|
|
|
// serverlist is received,
|
|
|
|
TEST_F(FallbackTest, Update) {
|
|
|
|
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.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate)},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args),
|
|
|
|
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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback will kick in immediately if the balancer channel fails.
|
|
|
|
TEST_F(FallbackTest, 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);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback will kick in immediately if the balancer call fails.
|
|
|
|
TEST_F(FallbackTest, 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);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is entered if balancer response is received but the
|
|
|
|
// backends can't be reached.
|
|
|
|
TEST_F(FallbackTest, 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.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {grpc_pick_unused_port_or_die()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
// Because no child policy is ready before fallback timeout, we enter fallback
|
|
|
|
// mode.
|
|
|
|
WaitForBackend(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is exited if the balancer tells the client to drop
|
|
|
|
// all the calls.
|
|
|
|
TEST_F(FallbackTest, 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 a response to drop all calls.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, 1000000}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is exited if the child policy becomes ready.
|
|
|
|
TEST_F(FallbackTest, 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);
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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(500, GPR_TIMESPAN));
|
|
|
|
// Send 0.5 second 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
class BalancerUpdateTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
BalancerUpdateTest() : XdsEnd2endTest(4, 3, 0) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the old LB call is still used after the balancer address update as
|
|
|
|
// long as that call is still alive.
|
|
|
|
TEST_F(BalancerUpdateTest, UpdateBalancersButKeepUsingOriginalBalancer) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(1, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the old LB call is still used after multiple balancer address
|
|
|
|
// updates as long as that call is still alive. 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(BalancerUpdateTest, Repeated) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(1, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that if the balancer name changes, a new LB channel will be created to
|
|
|
|
// replace the old one.
|
|
|
|
TEST_F(BalancerUpdateTest, UpdateBalancerName) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(1, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that if the balancer is down, the RPCs will still be sent to the
|
|
|
|
// backends according to the last balancer response, until a new balancer is
|
|
|
|
// reachable.
|
|
|
|
TEST_F(BalancerUpdateTest, DeadUpdate) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(1, EdsServiceImpl::BuildResponse(args), 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(BalancerUpdateTest, ReresolveDeadBackend).
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_F(UpdatesWithClientLoadReportingTest,
|
|
|
|
// ReresolveDeadBalancer)
|
|
|
|
|
|
|
|
class ClientLoadReportingTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
ClientLoadReportingTest() : XdsEnd2endTest(4, 1, 3) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the load report received at the balancer is correct.
|
|
|
|
TEST_F(ClientLoadReportingTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
// TODO(juanlishen): Partition the backends after multiple localities is
|
|
|
|
// tested.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that if the balancer restarts, the client load report contains the
|
|
|
|
// stats before and after the restart correctly.
|
|
|
|
TEST_F(ClientLoadReportingTest, BalancerRestart) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumBackendsFirstPass = backends_.size() / 2;
|
|
|
|
const size_t kNumBackendsSecondPass =
|
|
|
|
backends_.size() - kNumBackendsFirstPass;
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, kNumBackendsFirstPass)},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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_);
|
|
|
|
args = EdsServiceImpl::ResponseArgs({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsFirstPass)},
|
|
|
|
});
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
class ClientLoadReportingWithDropTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
ClientLoadReportingWithDropTest() : XdsEnd2endTest(4, 1, 20) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the drop stats are correctly reported by client load reporting.
|
|
|
|
TEST_F(ClientLoadReportingWithDropTest, Vanilla) {
|
|
|
|
SetNextResolution({}, kDefaultServiceConfig_.c_str());
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 3000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The EDS response contains two drop categories.
|
|
|
|
EdsServiceImpl::ResponseArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
ScheduleResponseForBalancer(0, EdsServiceImpl::BuildResponse(args), 0);
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends();
|
|
|
|
const size_t num_warmup = num_ok + num_failure + num_drops;
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++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_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
// Check client stats.
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(num_drops, client_stats->total_dropped_requests());
|
|
|
|
const size_t total_rpc = num_warmup + kNumRpcs;
|
|
|
|
EXPECT_THAT(
|
|
|
|
client_stats->dropped_requests(kLbDropType),
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(total_rpc * kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(total_rpc * kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
EXPECT_THAT(client_stats->dropped_requests(kThrottleDropType),
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(total_rpc * (1 - kDropRateForLb) *
|
|
|
|
kDropRateForThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(total_rpc * (1 - kDropRateForLb) *
|
|
|
|
kDropRateForThrottle * (1 + kErrorTolerance))));
|
|
|
|
// 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());
|
|
|
|
}
|
|
|
|
|
|
|
|
} // 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;
|
|
|
|
}
|