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grpc/test/cpp/end2end/xds_end2end_test.cc

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/*
*
* 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 <deque>
#include <memory>
#include <mutex>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <thread>
#include <vector>
#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 "absl/strings/str_cat.h"
#include "absl/types/optional.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/ext/filters/client_channel/xds/xds_api.h"
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/gpr/tmpfile.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/ads_for_test.grpc.pb.h"
#include "src/proto/grpc/testing/xds/cds_for_test.grpc.pb.h"
#include "src/proto/grpc/testing/xds/eds_for_test.grpc.pb.h"
#include "src/proto/grpc/testing/xds/lds_rds_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::Cluster;
using ::envoy::api::v2::ClusterLoadAssignment;
using ::envoy::api::v2::DiscoveryRequest;
using ::envoy::api::v2::DiscoveryResponse;
using ::envoy::api::v2::FractionalPercent;
using ::envoy::api::v2::HttpConnectionManager;
using ::envoy::api::v2::Listener;
using ::envoy::api::v2::RouteConfiguration;
using ::envoy::service::discovery::v2::AggregatedDiscoveryService;
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 kLdsTypeUrl[] = "type.googleapis.com/envoy.api.v2.Listener";
constexpr char kRdsTypeUrl[] =
"type.googleapis.com/envoy.api.v2.RouteConfiguration";
constexpr char kCdsTypeUrl[] = "type.googleapis.com/envoy.api.v2.Cluster";
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 char kDefaultResourceName[] = "application_target_name";
constexpr int kDefaultLocalityWeight = 3;
constexpr int kDefaultLocalityPriority = 0;
constexpr char kBootstrapFile[] =
"{\n"
" \"xds_servers\": [\n"
" {\n"
" \"server_uri\": \"fake:///lb\",\n"
" \"channel_creds\": [\n"
" {\n"
" \"type\": \"fake\"\n"
" }\n"
" ]\n"
" }\n"
" ],\n"
" \"node\": {\n"
" \"id\": \"xds_end2end_test\",\n"
" \"cluster\": \"test\",\n"
" \"metadata\": {\n"
" \"foo\": \"bar\"\n"
" },\n"
" \"locality\": {\n"
" \"region\": \"corp\",\n"
" \"zone\": \"svl\",\n"
" \"subzone\": \"mp3\"\n"
" }\n"
" }\n"
"}\n";
constexpr char kBootstrapFileBad[] =
"{\n"
" \"xds_servers\": [\n"
" {\n"
" \"server_uri\": \"fake:///wrong_lb\",\n"
" \"channel_creds\": [\n"
" {\n"
" \"type\": \"fake\"\n"
" }\n"
" ]\n"
" }\n"
" ],\n"
" \"node\": {\n"
" }\n"
"}\n";
char* g_bootstrap_file;
char* g_bootstrap_file_bad;
void WriteBootstrapFiles() {
char* bootstrap_file;
FILE* out = gpr_tmpfile("xds_bootstrap", &bootstrap_file);
fputs(kBootstrapFile, out);
fclose(out);
g_bootstrap_file = bootstrap_file;
out = gpr_tmpfile("xds_bootstrap_bad", &bootstrap_file);
fputs(kBootstrapFileBad, out);
fclose(out);
g_bootstrap_file_bad = bootstrap_file;
}
// Helper class to minimize the number of unique ports we use for this test.
class PortSaver {
public:
int GetPort() {
if (idx_ >= ports_.size()) {
ports_.push_back(grpc_pick_unused_port_or_die());
}
return ports_[idx_++];
}
void Reset() { idx_ = 0; }
private:
std::vector<int> ports_;
size_t idx_ = 0;
};
PortSaver* g_port_saver = nullptr;
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;
}
private:
grpc_core::Mutex mu_;
size_t request_count_ = 0;
size_t response_count_ = 0;
};
using LrsService = CountedService<LoadReportingService::Service>;
const char g_kCallCredsMdKey[] = "Balancer should not ...";
const char g_kCallCredsMdValue[] = "... receive me";
template <typename RpcService>
class BackendServiceImpl
: public CountedService<TestMultipleServiceImpl<RpcService>> {
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);
}
CountedService<TestMultipleServiceImpl<RpcService>>::IncreaseRequestCount();
const auto status =
TestMultipleServiceImpl<RpcService>::Echo(context, request, response);
CountedService<
TestMultipleServiceImpl<RpcService>>::IncreaseResponseCount();
AddClient(context->peer());
return status;
}
Status Echo1(ServerContext* context, const EchoRequest* request,
EchoResponse* response) override {
return Echo(context, request, response);
}
Status Echo2(ServerContext* context, const EchoRequest* request,
EchoResponse* response) override {
return Echo(context, request, response);
}
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 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.
explicit ClientStats(const ClusterStats& cluster_stats)
: cluster_name_(cluster_stats.cluster_name()),
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());
}
}
const std::string& cluster_name() const { return cluster_name_; }
const std::map<grpc::string, LocalityStats>& locality_stats() const {
return locality_stats_;
}
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::string cluster_name_;
std::map<grpc::string, LocalityStats> locality_stats_;
uint64_t total_dropped_requests_;
std::map<grpc::string, uint64_t> dropped_requests_;
};
class AdsServiceImpl : public AggregatedDiscoveryService::Service,
public std::enable_shared_from_this<AdsServiceImpl> {
public:
enum ResponseState {
NOT_SENT,
SENT,
ACKED,
NACKED,
};
struct EdsResourceArgs {
struct Locality {
Locality(const grpc::string& sub_zone, std::vector<int> ports,
int lb_weight = kDefaultLocalityWeight,
int priority = kDefaultLocalityPriority,
std::vector<envoy::api::v2::HealthStatus> health_statuses = {})
: sub_zone(std::move(sub_zone)),
ports(std::move(ports)),
lb_weight(lb_weight),
priority(priority),
health_statuses(std::move(health_statuses)) {}
const grpc::string sub_zone;
std::vector<int> ports;
int lb_weight;
int priority;
std::vector<envoy::api::v2::HealthStatus> health_statuses;
};
EdsResourceArgs() = default;
explicit EdsResourceArgs(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>;
AdsServiceImpl(bool enable_load_reporting) {
// Construct RDS response data.
default_route_config_.set_name(kDefaultResourceName);
auto* virtual_host = default_route_config_.add_virtual_hosts();
virtual_host->add_domains("*");
auto* route = virtual_host->add_routes();
route->mutable_match()->set_prefix("");
route->mutable_route()->set_cluster(kDefaultResourceName);
SetRdsResource(default_route_config_, kDefaultResourceName);
// Construct LDS response data (with inlined RDS result).
default_listener_ = BuildListener(default_route_config_);
SetLdsResource(default_listener_, kDefaultResourceName);
// Construct CDS response data.
default_cluster_.set_name(kDefaultResourceName);
default_cluster_.set_type(envoy::api::v2::Cluster::EDS);
default_cluster_.mutable_eds_cluster_config()
->mutable_eds_config()
->mutable_ads();
default_cluster_.set_lb_policy(envoy::api::v2::Cluster::ROUND_ROBIN);
if (enable_load_reporting) {
default_cluster_.mutable_lrs_server()->mutable_self();
}
SetCdsResource(default_cluster_, kDefaultResourceName);
}
Status StreamAggregatedResources(ServerContext* context,
Stream* stream) override {
gpr_log(GPR_INFO, "ADS[%p]: StreamAggregatedResources starts", this);
// Resources (type/name pairs) that have changed since the client
// subscribed to them.
UpdateQueue update_queue;
// Resources that the client will be subscribed to keyed by resource type
// url.
SubscriptionMap subscription_map;
[&]() {
{
grpc_core::MutexLock lock(&ads_mu_);
if (ads_done_) return;
}
// Balancer shouldn't receive the call credentials metadata.
EXPECT_EQ(context->client_metadata().find(g_kCallCredsMdKey),
context->client_metadata().end());
// Current Version map keyed by resource type url.
std::map<std::string, int> resource_type_version;
// Creating blocking thread to read from stream.
std::deque<DiscoveryRequest> requests;
bool stream_closed = false;
// Take a reference of the AdsServiceImpl object, reference will go
// out of scope after the reader thread is joined.
std::shared_ptr<AdsServiceImpl> ads_service_impl = shared_from_this();
std::thread reader(std::bind(&AdsServiceImpl::BlockingRead, this, stream,
&requests, &stream_closed));
// Main loop to look for requests and updates.
while (true) {
// Look for new requests and and decide what to handle.
absl::optional<DiscoveryResponse> response;
// Boolean to keep track if the loop received any work to do: a request
// or an update; regardless whether a response was actually sent out.
bool did_work = false;
{
grpc_core::MutexLock lock(&ads_mu_);
if (stream_closed) break;
if (!requests.empty()) {
DiscoveryRequest request = std::move(requests.front());
requests.pop_front();
did_work = true;
gpr_log(GPR_INFO,
"ADS[%p]: Received request for type %s with content %s",
this, request.type_url().c_str(),
request.DebugString().c_str());
// Identify ACK and NACK by looking for version information and
// comparing it to nonce (this server ensures they are always set to
// the same in a response.)
if (!request.response_nonce().empty()) {
resource_type_response_state_[request.type_url()] =
(!request.version_info().empty() &&
request.version_info() == request.response_nonce())
? ACKED
: NACKED;
}
// As long as the test did not tell us to ignore this type of
// request, we will loop through all resources to:
// 1. subscribe if necessary
// 2. update if necessary
// 3. unsubscribe if necessary
if (resource_types_to_ignore_.find(request.type_url()) ==
resource_types_to_ignore_.end()) {
auto& subscription_name_map =
subscription_map[request.type_url()];
auto& resource_name_map = resource_map_[request.type_url()];
std::set<std::string> resources_in_current_request;
std::set<std::string> resources_added_to_response;
for (const std::string& resource_name :
request.resource_names()) {
resources_in_current_request.emplace(resource_name);
auto& subscription_state = subscription_name_map[resource_name];
auto& resource_state = resource_name_map[resource_name];
MaybeSubscribe(request.type_url(), resource_name,
&subscription_state, &resource_state,
&update_queue);
if (ClientNeedsResourceUpdate(resource_state,
&subscription_state)) {
gpr_log(
GPR_INFO,
"ADS[%p]: Sending update for type=%s name=%s version=%d",
this, request.type_url().c_str(), resource_name.c_str(),
resource_state.version);
resources_added_to_response.emplace(resource_name);
if (!response.has_value()) response.emplace();
if (resource_state.resource.has_value()) {
response->add_resources()->CopyFrom(
resource_state.resource.value());
}
}
}
// Process unsubscriptions for any resource no longer
// present in the request's resource list.
ProcessUnsubscriptions(
request.type_url(), resources_in_current_request,
&subscription_name_map, &resource_name_map);
// Send response if needed.
if (!resources_added_to_response.empty()) {
CompleteBuildingDiscoveryResponse(
request.type_url(),
++resource_type_version[request.type_url()],
subscription_name_map, resources_added_to_response,
&response.value());
}
}
}
}
if (response.has_value()) {
gpr_log(GPR_INFO, "ADS[%p]: Sending response: %s", this,
response->DebugString().c_str());
stream->Write(response.value());
}
response.reset();
// Look for updates and decide what to handle.
{
grpc_core::MutexLock lock(&ads_mu_);
if (!update_queue.empty()) {
const std::string resource_type =
std::move(update_queue.front().first);
const std::string resource_name =
std::move(update_queue.front().second);
update_queue.pop_front();
did_work = true;
gpr_log(GPR_INFO, "ADS[%p]: Received update for type=%s name=%s",
this, resource_type.c_str(), resource_name.c_str());
auto& subscription_name_map = subscription_map[resource_type];
auto& resource_name_map = resource_map_[resource_type];
auto it = subscription_name_map.find(resource_name);
if (it != subscription_name_map.end()) {
SubscriptionState& subscription_state = it->second;
ResourceState& resource_state = resource_name_map[resource_name];
if (ClientNeedsResourceUpdate(resource_state,
&subscription_state)) {
gpr_log(
GPR_INFO,
"ADS[%p]: Sending update for type=%s name=%s version=%d",
this, resource_type.c_str(), resource_name.c_str(),
resource_state.version);
response.emplace();
if (resource_state.resource.has_value()) {
response->add_resources()->CopyFrom(
resource_state.resource.value());
}
CompleteBuildingDiscoveryResponse(
resource_type, ++resource_type_version[resource_type],
subscription_name_map, {resource_name}, &response.value());
}
}
}
}
if (response.has_value()) {
gpr_log(GPR_INFO, "ADS[%p]: Sending update response: %s", this,
response->DebugString().c_str());
stream->Write(response.value());
}
// If we didn't find anything to do, delay before the next loop
// iteration; otherwise, check whether we should exit and then
// immediately continue.
gpr_timespec deadline =
grpc_timeout_milliseconds_to_deadline(did_work ? 0 : 10);
{
grpc_core::MutexLock lock(&ads_mu_);
if (!ads_cond_.WaitUntil(&ads_mu_, [this] { return ads_done_; },
deadline))
break;
}
}
reader.join();
}();
// Clean up any subscriptions that were still active when the call finished.
{
grpc_core::MutexLock lock(&ads_mu_);
for (auto& p : subscription_map) {
const std::string& type_url = p.first;
SubscriptionNameMap& subscription_name_map = p.second;
for (auto& q : subscription_name_map) {
const std::string& resource_name = q.first;
SubscriptionState& subscription_state = q.second;
ResourceState& resource_state =
resource_map_[type_url][resource_name];
resource_state.subscriptions.erase(&subscription_state);
}
}
}
gpr_log(GPR_INFO, "ADS[%p]: StreamAggregatedResources done", this);
return Status::OK;
}
Listener default_listener() const { return default_listener_; }
RouteConfiguration default_route_config() const {
return default_route_config_;
}
Cluster default_cluster() const { return default_cluster_; }
ResponseState lds_response_state() {
grpc_core::MutexLock lock(&ads_mu_);
return resource_type_response_state_[kLdsTypeUrl];
}
ResponseState rds_response_state() {
grpc_core::MutexLock lock(&ads_mu_);
return resource_type_response_state_[kRdsTypeUrl];
}
ResponseState cds_response_state() {
grpc_core::MutexLock lock(&ads_mu_);
return resource_type_response_state_[kCdsTypeUrl];
}
ResponseState eds_response_state() {
grpc_core::MutexLock lock(&ads_mu_);
return resource_type_response_state_[kEdsTypeUrl];
}
void SetResourceIgnore(const std::string& type_url) {
grpc_core::MutexLock lock(&ads_mu_);
resource_types_to_ignore_.emplace(type_url);
}
void UnsetResource(const std::string& type_url, const std::string& name) {
grpc_core::MutexLock lock(&ads_mu_);
ResourceState& state = resource_map_[type_url][name];
++state.version;
state.resource.reset();
gpr_log(GPR_INFO, "ADS[%p]: Unsetting %s resource %s to version %u", this,
type_url.c_str(), name.c_str(), state.version);
for (SubscriptionState* subscription : state.subscriptions) {
subscription->update_queue->emplace_back(type_url, name);
}
}
void SetResource(google::protobuf::Any resource, const std::string& type_url,
const std::string& name) {
grpc_core::MutexLock lock(&ads_mu_);
ResourceState& state = resource_map_[type_url][name];
++state.version;
state.resource = std::move(resource);
gpr_log(GPR_INFO, "ADS[%p]: Updating %s resource %s to version %u", this,
type_url.c_str(), name.c_str(), state.version);
for (SubscriptionState* subscription : state.subscriptions) {
subscription->update_queue->emplace_back(type_url, name);
}
}
void SetLdsResource(const Listener& listener, const std::string& name) {
google::protobuf::Any resource;
resource.PackFrom(listener);
SetResource(std::move(resource), kLdsTypeUrl, name);
}
void SetRdsResource(const RouteConfiguration& route,
const std::string& name) {
google::protobuf::Any resource;
resource.PackFrom(route);
SetResource(std::move(resource), kRdsTypeUrl, name);
}
void SetCdsResource(const Cluster& cluster, const std::string& name) {
google::protobuf::Any resource;
resource.PackFrom(cluster);
SetResource(std::move(resource), kCdsTypeUrl, name);
}
void SetEdsResource(const ClusterLoadAssignment& assignment,
const std::string& name) {
google::protobuf::Any resource;
resource.PackFrom(assignment);
SetResource(std::move(resource), kEdsTypeUrl, name);
}
void SetLdsToUseDynamicRds() {
auto listener = default_listener_;
HttpConnectionManager http_connection_manager;
http_connection_manager.mutable_rds()->set_route_config_name(
kDefaultResourceName);
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
http_connection_manager);
SetLdsResource(listener, kDefaultResourceName);
}
static Listener BuildListener(const RouteConfiguration& route_config) {
HttpConnectionManager http_connection_manager;
*(http_connection_manager.mutable_route_config()) = route_config;
Listener listener;
listener.set_name(kDefaultResourceName);
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
http_connection_manager);
return listener;
}
void Start() {
grpc_core::MutexLock lock(&ads_mu_);
ads_done_ = false;
}
void Shutdown() {
{
grpc_core::MutexLock lock(&ads_mu_);
NotifyDoneWithAdsCallLocked();
resource_type_response_state_.clear();
}
gpr_log(GPR_INFO, "ADS[%p]: shut down", this);
}
static ClusterLoadAssignment BuildEdsResource(
const EdsResourceArgs& args,
const char* cluster_name = kDefaultResourceName) {
ClusterLoadAssignment assignment;
assignment.set_cluster_name(cluster_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 (size_t i = 0; i < locality.ports.size(); ++i) {
const int& port = locality.ports[i];
auto* lb_endpoints = endpoints->add_lb_endpoints();
if (locality.health_statuses.size() > i &&
locality.health_statuses[i] !=
envoy::api::v2::HealthStatus::UNKNOWN) {
lb_endpoints->set_health_status(locality.health_statuses[i]);
}
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);
}
}
return assignment;
}
void NotifyDoneWithAdsCall() {
grpc_core::MutexLock lock(&ads_mu_);
NotifyDoneWithAdsCallLocked();
}
void NotifyDoneWithAdsCallLocked() {
if (!ads_done_) {
ads_done_ = true;
ads_cond_.Broadcast();
}
}
private:
// A queue of resource type/name pairs that have changed since the client
// subscribed to them.
using UpdateQueue = std::deque<
std::pair<std::string /* type url */, std::string /* resource name */>>;
// A struct representing a client's subscription to a particular resource.
struct SubscriptionState {
// Version that the client currently knows about.
int current_version = 0;
// The queue upon which to place updates when the resource is updated.
UpdateQueue* update_queue;
};
// A struct representing the a client's subscription to all the resources.
using SubscriptionNameMap =
std::map<std::string /* resource_name */, SubscriptionState>;
using SubscriptionMap =
std::map<std::string /* type_url */, SubscriptionNameMap>;
// A struct representing the current state for a resource:
// - the version of the resource that is set by the SetResource() methods.
// - a list of subscriptions interested in this resource.
struct ResourceState {
int version = 0;
absl::optional<google::protobuf::Any> resource;
std::set<SubscriptionState*> subscriptions;
};
// A struct representing the current state for all resources:
// LDS, CDS, EDS, and RDS for the class as a whole.
using ResourceNameMap =
std::map<std::string /* resource_name */, ResourceState>;
using ResourceMap = std::map<std::string /* type_url */, ResourceNameMap>;
// Starting a thread to do blocking read on the stream until cancel.
void BlockingRead(Stream* stream, std::deque<DiscoveryRequest>* requests,
bool* stream_closed) {
DiscoveryRequest request;
bool seen_first_request = false;
while (stream->Read(&request)) {
if (!seen_first_request) {
EXPECT_TRUE(request.has_node());
ASSERT_FALSE(request.node().client_features().empty());
EXPECT_EQ(request.node().client_features(0),
"envoy.lb.does_not_support_overprovisioning");
seen_first_request = true;
}
{
grpc_core::MutexLock lock(&ads_mu_);
requests->emplace_back(std::move(request));
}
}
gpr_log(GPR_INFO, "ADS[%p]: Null read, stream closed", this);
grpc_core::MutexLock lock(&ads_mu_);
*stream_closed = true;
}
// Checks whether the client needs to receive a newer version of
// the resource. If so, updates subscription_state->current_version and
// returns true.
bool ClientNeedsResourceUpdate(const ResourceState& resource_state,
SubscriptionState* subscription_state) {
if (subscription_state->current_version < resource_state.version) {
subscription_state->current_version = resource_state.version;
return true;
}
return false;
}
// Subscribes to a resource if not already subscribed:
// 1. Sets the update_queue field in subscription_state.
// 2. Adds subscription_state to resource_state->subscriptions.
void MaybeSubscribe(const std::string& resource_type,
const std::string& resource_name,
SubscriptionState* subscription_state,
ResourceState* resource_state,
UpdateQueue* update_queue) {
// The update_queue will be null if we were not previously subscribed.
if (subscription_state->update_queue != nullptr) return;
subscription_state->update_queue = update_queue;
resource_state->subscriptions.emplace(subscription_state);
gpr_log(GPR_INFO, "ADS[%p]: subscribe to resource type %s name %s state %p",
this, resource_type.c_str(), resource_name.c_str(),
&subscription_state);
}
// Removes subscriptions for resources no longer present in the
// current request.
void ProcessUnsubscriptions(
const std::string& resource_type,
const std::set<std::string>& resources_in_current_request,
SubscriptionNameMap* subscription_name_map,
ResourceNameMap* resource_name_map) {
for (auto it = subscription_name_map->begin();
it != subscription_name_map->end();) {
const std::string& resource_name = it->first;
SubscriptionState& subscription_state = it->second;
if (resources_in_current_request.find(resource_name) !=
resources_in_current_request.end()) {
++it;
continue;
}
gpr_log(GPR_INFO, "ADS[%p]: Unsubscribe to type=%s name=%s state=%p",
this, resource_type.c_str(), resource_name.c_str(),
&subscription_state);
auto resource_it = resource_name_map->find(resource_name);
GPR_ASSERT(resource_it != resource_name_map->end());
auto& resource_state = resource_it->second;
resource_state.subscriptions.erase(&subscription_state);
if (resource_state.subscriptions.empty() &&
!resource_state.resource.has_value()) {
resource_name_map->erase(resource_it);
}
it = subscription_name_map->erase(it);
}
}
// Completing the building a DiscoveryResponse by adding common information
// for all resources and by adding all subscribed resources for LDS and CDS.
void CompleteBuildingDiscoveryResponse(
const std::string& resource_type, const int version,
const SubscriptionNameMap& subscription_name_map,
const std::set<std::string>& resources_added_to_response,
DiscoveryResponse* response) {
resource_type_response_state_[resource_type] = SENT;
response->set_type_url(resource_type);
response->set_version_info(absl::StrCat(version));
response->set_nonce(absl::StrCat(version));
if (resource_type == kLdsTypeUrl || resource_type == kCdsTypeUrl) {
// For LDS and CDS we must send back all subscribed resources
// (even the unchanged ones)
for (const auto& p : subscription_name_map) {
const std::string& resource_name = p.first;
if (resources_added_to_response.find(resource_name) ==
resources_added_to_response.end()) {
const ResourceState& resource_state =
resource_map_[resource_type][resource_name];
if (resource_state.resource.has_value()) {
response->add_resources()->CopyFrom(
resource_state.resource.value());
}
}
}
}
}
grpc_core::CondVar ads_cond_;
// Protect the members below.
grpc_core::Mutex ads_mu_;
bool ads_done_ = false;
Listener default_listener_;
RouteConfiguration default_route_config_;
Cluster default_cluster_;
std::map<std::string /*resource type*/, ResponseState>
resource_type_response_state_;
std::set<std::string /*resource_type*/> resource_types_to_ignore_;
// An instance data member containing the current state of all resources.
// Note that an entry will exist whenever either of the following is true:
// - The resource exists (i.e., has been created by SetResource() and has not
// yet been destroyed by UnsetResource()).
// - There is at least one subscription for the resource.
ResourceMap resource_map_;
};
class LrsServiceImpl : public LrsService,
public std::enable_shared_from_this<LrsServiceImpl> {
public:
using Stream = ServerReaderWriter<LoadStatsResponse, LoadStatsRequest>;
explicit LrsServiceImpl(int client_load_reporting_interval_seconds)
: client_load_reporting_interval_seconds_(
client_load_reporting_interval_seconds),
cluster_names_({kDefaultResourceName}) {}
Status StreamLoadStats(ServerContext* /*context*/, Stream* stream) override {
gpr_log(GPR_INFO, "LRS[%p]: StreamLoadStats starts", this);
GPR_ASSERT(client_load_reporting_interval_seconds_ > 0);
// Take a reference of the LrsServiceImpl object, reference will go
// out of scope after this method exits.
std::shared_ptr<LrsServiceImpl> lrs_service_impl = shared_from_this();
// Read initial request.
LoadStatsRequest request;
if (stream->Read(&request)) {
IncreaseRequestCount(); // Only for initial request.
// Verify server name set in metadata.
auto it =
request.node().metadata().fields().find("PROXYLESS_CLIENT_HOSTNAME");
GPR_ASSERT(it != request.node().metadata().fields().end());
EXPECT_EQ(it->second.string_value(), kDefaultResourceName);
// Send initial response.
LoadStatsResponse response;
for (const std::string& cluster_name : cluster_names_) {
response.add_clusters(cluster_name);
}
response.mutable_load_reporting_interval()->set_seconds(
client_load_reporting_interval_seconds_);
stream->Write(response);
IncreaseResponseCount();
// Wait for report.
request.Clear();
while (stream->Read(&request)) {
gpr_log(GPR_INFO, "LRS[%p]: received client load report message: %s",
this, request.DebugString().c_str());
std::vector<ClientStats> stats;
for (const auto& cluster_stats : request.cluster_stats()) {
stats.emplace_back(cluster_stats);
}
grpc_core::MutexLock lock(&load_report_mu_);
result_queue_.emplace_back(std::move(stats));
if (load_report_cond_ != nullptr) 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, "LRS[%p]: StreamLoadStats done", this);
return Status::OK;
}
// Must be called before the LRS call is started.
void set_cluster_names(const std::set<std::string>& cluster_names) {
cluster_names_ = cluster_names;
}
void Start() {
lrs_done_ = false;
result_queue_.clear();
}
void Shutdown() {
{
grpc_core::MutexLock lock(&lrs_mu_);
NotifyDoneWithLrsCallLocked();
}
gpr_log(GPR_INFO, "LRS[%p]: shut down", this);
}
std::vector<ClientStats> WaitForLoadReport() {
grpc_core::MutexLock lock(&load_report_mu_);
grpc_core::CondVar cv;
if (result_queue_.empty()) {
load_report_cond_ = &cv;
load_report_cond_->WaitUntil(&load_report_mu_,
[this] { return !result_queue_.empty(); });
load_report_cond_ = nullptr;
}
std::vector<ClientStats> result = std::move(result_queue_.front());
result_queue_.pop_front();
return result;
}
void NotifyDoneWithLrsCall() {
grpc_core::MutexLock lock(&lrs_mu_);
NotifyDoneWithLrsCallLocked();
}
private:
void NotifyDoneWithLrsCallLocked() {
if (!lrs_done_) {
lrs_done_ = true;
lrs_cv_.Broadcast();
}
}
const int client_load_reporting_interval_seconds_;
std::set<std::string> cluster_names_;
grpc_core::CondVar lrs_cv_;
grpc_core::Mutex lrs_mu_; // Protects lrs_done_.
bool lrs_done_ = false;
grpc_core::Mutex load_report_mu_; // Protects the members below.
grpc_core::CondVar* load_report_cond_ = nullptr;
std::deque<std::vector<ClientStats>> result_queue_;
};
class TestType {
public:
TestType(bool use_xds_resolver, bool enable_load_reporting)
: use_xds_resolver_(use_xds_resolver),
enable_load_reporting_(enable_load_reporting) {}
bool use_xds_resolver() const { return use_xds_resolver_; }
bool enable_load_reporting() const { return enable_load_reporting_; }
grpc::string AsString() const {
grpc::string retval = (use_xds_resolver_ ? "XdsResolver" : "FakeResolver");
if (enable_load_reporting_) retval += "WithLoadReporting";
return retval;
}
private:
const bool use_xds_resolver_;
const bool enable_load_reporting_;
};
class XdsEnd2endTest : public ::testing::TestWithParam<TestType> {
protected:
XdsEnd2endTest(size_t num_backends, size_t num_balancers,
int client_load_reporting_interval_seconds = 100)
: 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 {
gpr_setenv("GRPC_XDS_BOOTSTRAP", g_bootstrap_file);
g_port_saver->Reset();
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();
}
// Start the load balancers.
for (size_t i = 0; i < num_balancers_; ++i) {
balancers_.emplace_back(
new BalancerServerThread(GetParam().enable_load_reporting()
? client_load_reporting_interval_seconds_
: 0));
balancers_.back()->Start();
}
ResetStub();
}
void TearDown() override {
ShutdownAllBackends();
for (auto& balancer : balancers_) balancer->Shutdown();
}
void StartAllBackends() {
for (auto& backend : backends_) backend->Start();
}
void StartBackend(size_t index) { backends_[index]->Start(); }
void ShutdownAllBackends() {
for (auto& backend : backends_) backend->Shutdown();
}
void ShutdownBackend(size_t index) { backends_[index]->Shutdown(); }
void ResetStub(int failover_timeout = 0,
const grpc::string& expected_targets = "",
int xds_resource_does_not_exist_timeout = 0,
bool xds_routing_enabled = false) {
ChannelArguments args;
if (failover_timeout > 0) {
args.SetInt(GRPC_ARG_PRIORITY_FAILOVER_TIMEOUT_MS, failover_timeout);
}
if (xds_resource_does_not_exist_timeout > 0) {
args.SetInt(GRPC_ARG_XDS_RESOURCE_DOES_NOT_EXIST_TIMEOUT_MS,
xds_resource_does_not_exist_timeout);
}
if (xds_routing_enabled) {
args.SetInt(GRPC_ARG_XDS_ROUTING_ENABLED, 1);
}
// If the parent channel is using the fake resolver, we inject the
// response generator for the parent here, and then SetNextResolution()
// will inject the xds channel's response generator via the parent's
// response generator.
//
// In contrast, if we are using the xds resolver, then the parent
// channel never uses a response generator, and we inject the xds
// channel's response generator here.
args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
GetParam().use_xds_resolver()
? lb_channel_response_generator_.get()
: response_generator_.get());
if (!expected_targets.empty()) {
args.SetString(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS, expected_targets);
}
grpc::string scheme =
GetParam().use_xds_resolver() ? "xds-experimental" : "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_);
stub1_ = grpc::testing::EchoTest1Service::NewStub(channel_);
stub2_ = grpc::testing::EchoTest2Service::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(size_t start_index = 0,
size_t stop_index = 0,
bool reset_counters = true) {
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);
}
if (reset_counters) ResetBackendCounters();
gpr_log(GPR_INFO,
"Performed %d warm up requests against the backends. "
"%d succeeded, %d failed, %d dropped.",
num_total, 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,
bool require_success = false) {
gpr_log(GPR_INFO, "========= WAITING FOR BACKEND %lu ==========",
static_cast<unsigned long>(backend_idx));
do {
Status status = SendRpc();
if (require_success) {
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
<< " message=" << status.error_message();
}
} while (backends_[backend_idx]->backend_service()->request_count() == 0);
if (reset_counters) ResetBackendCounters();
gpr_log(GPR_INFO, "========= BACKEND %lu READY ==========",
static_cast<unsigned long>(backend_idx));
}
grpc_core::ServerAddressList CreateAddressListFromPortList(
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));
addresses.emplace_back(address.addr, address.len, nullptr);
grpc_uri_destroy(lb_uri);
gpr_free(lb_uri_str);
}
return addresses;
}
void SetNextResolution(const std::vector<int>& ports,
grpc_core::FakeResolverResponseGenerator*
lb_channel_response_generator = nullptr) {
if (GetParam().use_xds_resolver()) return; // Not used with xds resolver.
grpc_core::ExecCtx exec_ctx;
grpc_core::Resolver::Result result;
result.addresses = CreateAddressListFromPortList(ports);
grpc_error* error = GRPC_ERROR_NONE;
const char* service_config_json =
GetParam().enable_load_reporting()
? kDefaultServiceConfig_
: kDefaultServiceConfigWithoutLoadReporting_;
result.service_config =
grpc_core::ServiceConfig::Create(service_config_json, &error);
ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
ASSERT_NE(result.service_config.get(), nullptr);
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 = CreateAddressListFromPortList(ports);
if (service_config_json != nullptr) {
grpc_error* error = GRPC_ERROR_NONE;
result.service_config =
grpc_core::ServiceConfig::Create(service_config_json, &error);
ASSERT_NE(result.service_config.get(), nullptr);
ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(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 = CreateAddressListFromPortList(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;
}
enum RpcService {
SERVICE_ECHO,
SERVICE_ECHO1,
SERVICE_ECHO2,
};
enum RpcMethod {
METHOD_ECHO,
METHOD_ECHO1,
METHOD_ECHO2,
};
struct RpcOptions {
RpcService service = SERVICE_ECHO;
RpcMethod method = METHOD_ECHO;
int timeout_ms = 1000;
bool wait_for_ready = false;
bool server_fail = false;
RpcOptions() {}
RpcOptions& set_rpc_service(RpcService rpc_service) {
service = rpc_service;
return *this;
}
RpcOptions& set_rpc_method(RpcMethod rpc_method) {
method = rpc_method;
return *this;
}
RpcOptions& set_timeout_ms(int rpc_timeout_ms) {
timeout_ms = rpc_timeout_ms;
return *this;
}
RpcOptions& set_wait_for_ready(bool rpc_wait_for_ready) {
wait_for_ready = rpc_wait_for_ready;
return *this;
}
RpcOptions& set_server_fail(bool rpc_server_fail) {
server_fail = rpc_server_fail;
return *this;
}
};
template <typename Stub>
Status SendRpcMethod(Stub* stub, const RpcOptions& rpc_options,
ClientContext* context, EchoRequest& request,
EchoResponse* response) {
switch (rpc_options.method) {
case METHOD_ECHO:
return (*stub)->Echo(context, request, response);
case METHOD_ECHO1:
return (*stub)->Echo1(context, request, response);
case METHOD_ECHO2:
return (*stub)->Echo2(context, request, response);
}
}
Status SendRpc(const RpcOptions& rpc_options = RpcOptions(),
EchoResponse* response = nullptr) {
const bool local_response = (response == nullptr);
if (local_response) response = new EchoResponse;
EchoRequest request;
ClientContext context;
context.set_deadline(
grpc_timeout_milliseconds_to_deadline(rpc_options.timeout_ms));
if (rpc_options.wait_for_ready) context.set_wait_for_ready(true);
request.set_message(kRequestMessage_);
if (rpc_options.server_fail) {
request.mutable_param()->mutable_expected_error()->set_code(
GRPC_STATUS_FAILED_PRECONDITION);
}
Status status;
switch (rpc_options.service) {
case SERVICE_ECHO:
status =
SendRpcMethod(&stub_, rpc_options, &context, request, response);
break;
case SERVICE_ECHO1:
status =
SendRpcMethod(&stub1_, rpc_options, &context, request, response);
break;
case SERVICE_ECHO2:
status =
SendRpcMethod(&stub2_, rpc_options, &context, request, response);
break;
}
if (local_response) delete response;
return status;
}
void CheckRpcSendOk(const size_t times = 1,
const RpcOptions& rpc_options = RpcOptions()) {
for (size_t i = 0; i < times; ++i) {
EchoResponse response;
const Status status = SendRpc(rpc_options, &response);
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
<< " message=" << status.error_message();
EXPECT_EQ(response.message(), kRequestMessage_);
}
}
void CheckRpcSendFailure(const size_t times = 1, bool server_fail = false) {
for (size_t i = 0; i < times; ++i) {
const Status status = SendRpc(RpcOptions().set_server_fail(server_fail));
EXPECT_FALSE(status.ok());
}
}
public:
// This method could benefit test subclasses; to make it accessible
// via bind with a qualified name, it needs to be public.
void SetEdsResourceWithDelay(size_t i,
const ClusterLoadAssignment& assignment,
int delay_ms, const std::string& name) {
GPR_ASSERT(delay_ms > 0);
gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(delay_ms));
balancers_[i]->ads_service()->SetEdsResource(assignment, name);
}
protected:
class ServerThread {
public:
ServerThread() : port_(g_port_saver->GetPort()) {}
virtual ~ServerThread(){};
void Start() {
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, &mu, &cond)));
cond.Wait(&mu);
gpr_log(GPR_INFO, "%s server startup complete", Type());
}
void Serve(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 << "localhost:" << 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<::grpc::testing::EchoTestService::Service>*
backend_service() {
return &backend_service_;
}
BackendServiceImpl<::grpc::testing::EchoTest1Service::Service>*
backend_service1() {
return &backend_service1_;
}
BackendServiceImpl<::grpc::testing::EchoTest2Service::Service>*
backend_service2() {
return &backend_service2_;
}
private:
void RegisterAllServices(ServerBuilder* builder) override {
builder->RegisterService(&backend_service_);
builder->RegisterService(&backend_service1_);
builder->RegisterService(&backend_service2_);
}
void StartAllServices() override {
backend_service_.Start();
backend_service1_.Start();
backend_service2_.Start();
}
void ShutdownAllServices() override {
backend_service_.Shutdown();
backend_service1_.Shutdown();
backend_service2_.Shutdown();
}
const char* Type() override { return "Backend"; }
BackendServiceImpl<::grpc::testing::EchoTestService::Service>
backend_service_;
BackendServiceImpl<::grpc::testing::EchoTest1Service::Service>
backend_service1_;
BackendServiceImpl<::grpc::testing::EchoTest2Service::Service>
backend_service2_;
};
class BalancerServerThread : public ServerThread {
public:
explicit BalancerServerThread(int client_load_reporting_interval = 0)
: ads_service_(new AdsServiceImpl(client_load_reporting_interval > 0)),
lrs_service_(new LrsServiceImpl(client_load_reporting_interval)) {}
AdsServiceImpl* ads_service() { return ads_service_.get(); }
LrsServiceImpl* lrs_service() { return lrs_service_.get(); }
private:
void RegisterAllServices(ServerBuilder* builder) override {
builder->RegisterService(ads_service_.get());
builder->RegisterService(lrs_service_.get());
}
void StartAllServices() override {
ads_service_->Start();
lrs_service_->Start();
}
void ShutdownAllServices() override {
ads_service_->Shutdown();
lrs_service_->Shutdown();
}
const char* Type() override { return "Balancer"; }
std::shared_ptr<AdsServiceImpl> ads_service_;
std::shared_ptr<LrsServiceImpl> lrs_service_;
};
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::unique_ptr<grpc::testing::EchoTest1Service::Stub> stub1_;
std::unique_ptr<grpc::testing::EchoTest2Service::Stub> stub2_;
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_ = kDefaultResourceName;
const char* kDefaultServiceConfig_ =
"{\n"
" \"loadBalancingConfig\":[\n"
" { \"does_not_exist\":{} },\n"
" { \"eds_experimental\":{\n"
" \"clusterName\": \"application_target_name\",\n"
" \"lrsLoadReportingServerName\": \"\"\n"
" } }\n"
" ]\n"
"}";
const char* kDefaultServiceConfigWithoutLoadReporting_ =
"{\n"
" \"loadBalancingConfig\":[\n"
" { \"does_not_exist\":{} },\n"
" { \"eds_experimental\":{\n"
" \"clusterName\": \"application_target_name\"\n"
" } }\n"
" ]\n"
"}";
};
class BasicTest : public XdsEnd2endTest {
public:
BasicTest() : XdsEnd2endTest(4, 1) {}
};
// 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_P(BasicTest, Vanilla) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcsPerAddress = 100;
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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());
}
// Check LB policy name for the channel.
EXPECT_EQ((GetParam().use_xds_resolver() ? "xds_routing_experimental"
: "eds_experimental"),
channel_->GetLoadBalancingPolicyName());
}
TEST_P(BasicTest, IgnoresUnhealthyEndpoints) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcsPerAddress = 100;
AdsServiceImpl::EdsResourceArgs args({
{"locality0",
GetBackendPorts(),
kDefaultLocalityWeight,
kDefaultLocalityPriority,
{envoy::api::v2::HealthStatus::DRAINING}},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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(/*start_index=*/1);
// Send kNumRpcsPerAddress RPCs per server.
CheckRpcSendOk(kNumRpcsPerAddress * (num_backends_ - 1));
// Each backend should have gotten 100 requests.
for (size_t i = 1; i < backends_.size(); ++i) {
EXPECT_EQ(kNumRpcsPerAddress,
backends_[i]->backend_service()->request_count());
}
}
// Tests that subchannel sharing works when the same backend is listed multiple
// times.
TEST_P(BasicTest, SameBackendListedMultipleTimes) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// Same backend listed twice.
std::vector<int> ports(2, backends_[0]->port());
AdsServiceImpl::EdsResourceArgs args({
{"locality0", ports},
});
const size_t kNumRpcsPerAddress = 10;
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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_P(BasicTest, InitiallyEmptyServerlist) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
const int kCallDeadlineMs = kServerlistDelayMs * 2;
// First response is an empty serverlist, sent right away.
AdsServiceImpl::EdsResourceArgs::Locality empty_locality("locality0", {});
AdsServiceImpl::EdsResourceArgs args({
empty_locality,
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Send non-empty serverlist only after kServerlistDelayMs.
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", GetBackendPorts()},
});
std::thread delayed_resource_setter(
std::bind(&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), kServerlistDelayMs,
kDefaultResourceName));
const auto t0 = system_clock::now();
// Client will block: LB will initially send empty serverlist.
CheckRpcSendOk(
1, RpcOptions().set_timeout_ms(kCallDeadlineMs).set_wait_for_ready(true));
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);
delayed_resource_setter.join();
}
// Tests that RPCs will fail with UNAVAILABLE instead of DEADLINE_EXCEEDED if
// all the servers are unreachable.
TEST_P(BasicTest, AllServersUnreachableFailFast) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumUnreachableServers = 5;
std::vector<int> ports;
for (size_t i = 0; i < kNumUnreachableServers; ++i) {
ports.push_back(g_port_saver->GetPort());
}
AdsServiceImpl::EdsResourceArgs args({
{"locality0", ports},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
const Status status = SendRpc();
// The error shouldn't be DEADLINE_EXCEEDED.
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code());
}
// Tests that RPCs fail when the backends are down, and will succeed again after
// the backends are restarted.
TEST_P(BasicTest, BackendsRestart) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
WaitForAllBackends();
// Stop backends. RPCs should fail.
ShutdownAllBackends();
// Sending multiple failed requests instead of just one to ensure that the
// client notices that all backends are down before we restart them. If we
// didn't do this, then a single RPC could fail here due to the race condition
// between the LB pick and the GOAWAY from the chosen backend being shut down,
// which would not actually prove that the client noticed that all of the
// backends are down. Then, when we send another request below (which we
// expect to succeed), if the callbacks happen in the wrong order, the same
// race condition could happen again due to the client not yet having noticed
// that the backends were all down.
CheckRpcSendFailure(num_backends_);
// Restart all backends. RPCs should start succeeding again.
StartAllBackends();
CheckRpcSendOk(1, RpcOptions().set_timeout_ms(2000).set_wait_for_ready(true));
}
using XdsResolverOnlyTest = BasicTest;
// Tests switching over from one cluster to another.
TEST_P(XdsResolverOnlyTest, ChangeClusters) {
const char* kNewClusterName = "new_cluster_name";
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 2)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// We need to wait for all backends to come online.
WaitForAllBackends(0, 2);
// Populate new EDS resource.
AdsServiceImpl::EdsResourceArgs args2({
{"locality0", GetBackendPorts(2, 4)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args2, kNewClusterName),
kNewClusterName);
// Populate new CDS resource.
Cluster new_cluster = balancers_[0]->ads_service()->default_cluster();
new_cluster.set_name(kNewClusterName);
balancers_[0]->ads_service()->SetCdsResource(new_cluster, kNewClusterName);
// Change RDS resource to point to new cluster.
RouteConfiguration new_route_config =
balancers_[0]->ads_service()->default_route_config();
new_route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->set_cluster(kNewClusterName);
Listener listener =
balancers_[0]->ads_service()->BuildListener(new_route_config);
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
// Wait for all new backends to be used.
std::tuple<int, int, int> counts = WaitForAllBackends(2, 4);
// Make sure no RPCs failed in the transition.
EXPECT_EQ(0, std::get<1>(counts));
}
// Tests that things keep workng if the cluster resource disappears.
TEST_P(XdsResolverOnlyTest, ClusterRemoved) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// We need to wait for all backends to come online.
WaitForAllBackends();
// Unset CDS resource.
balancers_[0]->ads_service()->UnsetResource(kCdsTypeUrl,
kDefaultResourceName);
// Make sure RPCs are still succeeding.
CheckRpcSendOk(100 * num_backends_);
// Make sure we ACK'ed the update.
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that we restart all xDS requests when we reestablish the ADS call.
TEST_P(XdsResolverOnlyTest, RestartsRequestsUponReconnection) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
const char* kNewClusterName = "new_cluster_name";
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 2)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// We need to wait for all backends to come online.
WaitForAllBackends(0, 2);
// Now shut down and restart the balancer. When the client
// reconnects, it should automatically restart the requests for all
// resource types.
balancers_[0]->Shutdown();
balancers_[0]->Start();
// Make sure things are still working.
CheckRpcSendOk(100);
// Populate new EDS resource.
AdsServiceImpl::EdsResourceArgs args2({
{"locality0", GetBackendPorts(2, 4)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args2, kNewClusterName),
kNewClusterName);
// Populate new CDS resource.
Cluster new_cluster = balancers_[0]->ads_service()->default_cluster();
new_cluster.set_name(kNewClusterName);
balancers_[0]->ads_service()->SetCdsResource(new_cluster, kNewClusterName);
// Change RDS resource to point to new cluster.
RouteConfiguration new_route_config =
balancers_[0]->ads_service()->default_route_config();
new_route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->set_cluster(kNewClusterName);
balancers_[0]->ads_service()->SetRdsResource(new_route_config,
kDefaultResourceName);
// Wait for all new backends to be used.
std::tuple<int, int, int> counts = WaitForAllBackends(2, 4);
// Make sure no RPCs failed in the transition.
EXPECT_EQ(0, std::get<1>(counts));
}
TEST_P(XdsResolverOnlyTest, DefaultRouteSpecifiesSlashPrefix) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_match()
->set_prefix("/");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// We need to wait for all backends to come online.
WaitForAllBackends();
}
class XdsResolverLoadReportingOnlyTest : public XdsEnd2endTest {
public:
XdsResolverLoadReportingOnlyTest() : XdsEnd2endTest(4, 1, 3) {}
};
// Tests load reporting when switching over from one cluster to another.
TEST_P(XdsResolverLoadReportingOnlyTest, ChangeClusters) {
const char* kNewClusterName = "new_cluster_name";
balancers_[0]->lrs_service()->set_cluster_names(
{kDefaultResourceName, kNewClusterName});
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// cluster kDefaultResourceName -> locality0 -> backends 0 and 1
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 2)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// cluster kNewClusterName -> locality1 -> backends 2 and 3
AdsServiceImpl::EdsResourceArgs args2({
{"locality1", GetBackendPorts(2, 4)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args2, kNewClusterName),
kNewClusterName);
// CDS resource for kNewClusterName.
Cluster new_cluster = balancers_[0]->ads_service()->default_cluster();
new_cluster.set_name(kNewClusterName);
balancers_[0]->ads_service()->SetCdsResource(new_cluster, kNewClusterName);
// Wait for all backends to come online.
int num_ok = 0;
int num_failure = 0;
int num_drops = 0;
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends(0, 2);
// The load report received at the balancer should be correct.
std::vector<ClientStats> load_report =
balancers_[0]->lrs_service()->WaitForLoadReport();
EXPECT_THAT(
load_report,
::testing::ElementsAre(::testing::AllOf(
::testing::Property(&ClientStats::cluster_name, kDefaultResourceName),
::testing::Property(
&ClientStats::locality_stats,
::testing::ElementsAre(::testing::Pair(
"locality0",
::testing::AllOf(
::testing::Field(&ClientStats::LocalityStats::
total_successful_requests,
num_ok),
::testing::Field(&ClientStats::LocalityStats::
total_requests_in_progress,
0UL),
::testing::Field(
&ClientStats::LocalityStats::total_error_requests,
num_failure),
::testing::Field(
&ClientStats::LocalityStats::total_issued_requests,
num_failure + num_ok))))),
::testing::Property(&ClientStats::total_dropped_requests,
num_drops))));
// Change RDS resource to point to new cluster.
RouteConfiguration new_route_config =
balancers_[0]->ads_service()->default_route_config();
new_route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->set_cluster(kNewClusterName);
Listener listener =
balancers_[0]->ads_service()->BuildListener(new_route_config);
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
// Wait for all new backends to be used.
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends(2, 4);
// The load report received at the balancer should be correct.
load_report = balancers_[0]->lrs_service()->WaitForLoadReport();
EXPECT_THAT(
load_report,
::testing::ElementsAre(
::testing::AllOf(
::testing::Property(&ClientStats::cluster_name,
kDefaultResourceName),
::testing::Property(
&ClientStats::locality_stats,
::testing::ElementsAre(::testing::Pair(
"locality0",
::testing::AllOf(
::testing::Field(&ClientStats::LocalityStats::
total_successful_requests,
::testing::Lt(num_ok)),
::testing::Field(&ClientStats::LocalityStats::
total_requests_in_progress,
0UL),
::testing::Field(
&ClientStats::LocalityStats::total_error_requests,
::testing::Le(num_failure)),
::testing::Field(
&ClientStats::LocalityStats::
total_issued_requests,
::testing::Le(num_failure + num_ok)))))),
::testing::Property(&ClientStats::total_dropped_requests,
num_drops)),
::testing::AllOf(
::testing::Property(&ClientStats::cluster_name, kNewClusterName),
::testing::Property(
&ClientStats::locality_stats,
::testing::ElementsAre(::testing::Pair(
"locality1",
::testing::AllOf(
::testing::Field(&ClientStats::LocalityStats::
total_successful_requests,
::testing::Le(num_ok)),
::testing::Field(&ClientStats::LocalityStats::
total_requests_in_progress,
0UL),
::testing::Field(
&ClientStats::LocalityStats::total_error_requests,
::testing::Le(num_failure)),
::testing::Field(
&ClientStats::LocalityStats::
total_issued_requests,
::testing::Le(num_failure + num_ok)))))),
::testing::Property(&ClientStats::total_dropped_requests,
num_drops))));
int total_ok = 0;
int total_failure = 0;
for (const ClientStats& client_stats : load_report) {
total_ok += client_stats.total_successful_requests();
total_failure += client_stats.total_error_requests();
}
EXPECT_EQ(total_ok, num_ok);
EXPECT_EQ(total_failure, num_failure);
// 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());
}
using SecureNamingTest = BasicTest;
// Tests that secure naming check passes if target name is expected.
TEST_P(SecureNamingTest, TargetNameIsExpected) {
// TODO(juanlishen): Use separate fake creds for the balancer channel.
ResetStub(0, kApplicationTargetName_ + ";lb");
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
const size_t kNumRpcsPerAddress = 100;
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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());
}
}
// Tests that secure naming check fails if target name is unexpected.
TEST_P(SecureNamingTest, TargetNameIsUnexpected) {
gpr_setenv("GRPC_XDS_BOOTSTRAP", g_bootstrap_file_bad);
::testing::FLAGS_gtest_death_test_style = "threadsafe";
// Make sure that we blow up (via abort() from the security connector) when
// the name from the balancer doesn't match expectations.
ASSERT_DEATH_IF_SUPPORTED(
{
ResetStub(0, kApplicationTargetName_ + ";lb");
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
channel_->WaitForConnected(grpc_timeout_seconds_to_deadline(1));
},
"");
}
using LdsTest = BasicTest;
// Tests that LDS client should send an ACK upon correct LDS response (with
// inlined RDS result).
TEST_P(LdsTest, Vanilla) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that LDS client should send a NACK if there is no API listener in the
// Listener in the LDS response.
TEST_P(LdsTest, NoApiListener) {
auto listener = balancers_[0]->ads_service()->default_listener();
listener.clear_api_listener();
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if the route_specifier in the
// http_connection_manager is neither inlined route_config nor RDS.
TEST_P(LdsTest, WrongRouteSpecifier) {
auto listener = balancers_[0]->ads_service()->default_listener();
HttpConnectionManager http_connection_manager;
http_connection_manager.mutable_scoped_routes();
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
http_connection_manager);
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if matching domain can't be found in
// the LDS response.
TEST_P(LdsTest, NoMatchedDomain) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)->clear_domains();
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should choose the virtual host with matching domain if
// multiple virtual hosts exist in the LDS response.
TEST_P(LdsTest, ChooseMatchedDomain) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
*(route_config.add_virtual_hosts()) = route_config.virtual_hosts(0);
route_config.mutable_virtual_hosts(0)->clear_domains();
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that LDS client should choose the last route in the virtual host if
// multiple routes exist in the LDS response.
TEST_P(LdsTest, ChooseLastRoute) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
*(route_config.mutable_virtual_hosts(0)->add_routes()) =
route_config.virtual_hosts(0).routes(0);
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that LDS client should send a NACK if route match has non-empty prefix
// as the only route (default) in the LDS response.
TEST_P(LdsTest, RouteMatchHasNonemptyPrefix) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_match()
->set_prefix("nonempty_prefix");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has a prefix
// string with no "/".
TEST_P(LdsTest, RouteMatchHasInvalidPrefixNonEmptyNoSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("grpc.testing.EchoTest1Service");
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has a prefix
// string does not end with "/".
TEST_P(LdsTest, RouteMatchHasInvalidPrefixNoEndingSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("/grpc.testing.EchoTest1Service");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has a prefix
// string does not start with "/".
TEST_P(LdsTest, RouteMatchHasInvalidPrefixNoLeadingSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("grpc.testing.EchoTest1Service/");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has a prefix
// string with extra content outside of "/service/".
TEST_P(LdsTest, RouteMatchHasInvalidPrefixExtraContent) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("/grpc.testing.EchoTest1Service/Echo1");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has a prefix
// string "//".
TEST_P(LdsTest, RouteMatchHasInvalidPrefixNoContent) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("//");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// but it's empty.
TEST_P(LdsTest, RouteMatchHasInvalidPathEmptyPath) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// string does not start with "/".
TEST_P(LdsTest, RouteMatchHasInvalidPathNoLeadingSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("grpc.testing.EchoTest1Service/Echo1");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// string that ends with "/".
TEST_P(LdsTest, RouteMatchHasInvalidPathEndsWithSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("/grpc.testing.EchoTest1Service/Echo1/");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// string that misses "/" between service and method.
TEST_P(LdsTest, RouteMatchHasInvalidPathMissingMiddleSlash) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("/grpc.testing.EchoTest1Service.Echo1");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// string that is missing service.
TEST_P(LdsTest, RouteMatchHasInvalidPathMissingService) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("//Echo1");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route match has path
// string that is missing method.
TEST_P(LdsTest, RouteMatchHasInvalidPathMissingMethod) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = route_config.mutable_virtual_hosts(0)->mutable_routes(0);
auto* default_route = route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
route1->mutable_match()->set_path("/grpc.testing.EchoTest1Service/");
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client should send a NACK if route has an action other than
// RouteAction in the LDS response.
TEST_P(LdsTest, RouteHasNoRouteAction) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)->mutable_routes(0)->mutable_redirect();
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// TODO@donnadionne: Add more invalid config tests to cover all errors in
// xds_api.cc
// Tests that LDS client should send a NACK if RouteAction has a
// cluster_specifier other than cluster in the LDS response.
TEST_P(LdsTest, RouteActionHasNoCluster) {
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetLdsResource(
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that LDS client times out when no response received.
TEST_P(LdsTest, Timeout) {
ResetStub(0, "", 500);
balancers_[0]->ads_service()->SetResourceIgnore(kLdsTypeUrl);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
}
// Tests that LDS client should choose the default route (with no matching
// specified) after unable to find a match with previous routes.
TEST_P(LdsTest, XdsRoutingPathMatching) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
const char* kNewCluster1Name = "new_cluster_1";
const char* kNewCluster2Name = "new_cluster_2";
const size_t kNumEcho1Rpcs = 10;
const size_t kNumEcho2Rpcs = 20;
const size_t kNumEchoRpcs = 30;
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// Populate new EDS resources.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 2)},
});
AdsServiceImpl::EdsResourceArgs args1({
{"locality0", GetBackendPorts(2, 3)},
});
AdsServiceImpl::EdsResourceArgs args2({
{"locality0", GetBackendPorts(3, 4)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args1, kNewCluster1Name),
kNewCluster1Name);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args2, kNewCluster2Name),
kNewCluster2Name);
// Populate new CDS resources.
Cluster new_cluster1 = balancers_[0]->ads_service()->default_cluster();
new_cluster1.set_name(kNewCluster1Name);
balancers_[0]->ads_service()->SetCdsResource(new_cluster1, kNewCluster1Name);
Cluster new_cluster2 = balancers_[0]->ads_service()->default_cluster();
new_cluster2.set_name(kNewCluster2Name);
balancers_[0]->ads_service()->SetCdsResource(new_cluster2, kNewCluster2Name);
// Populating Route Configurations for LDS.
RouteConfiguration new_route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = new_route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_path("/grpc.testing.EchoTest1Service/Echo1");
route1->mutable_route()->set_cluster(kNewCluster1Name);
auto* route2 = new_route_config.mutable_virtual_hosts(0)->add_routes();
route2->mutable_match()->set_path("/grpc.testing.EchoTest2Service/Echo2");
route2->mutable_route()->set_cluster(kNewCluster2Name);
auto* route3 = new_route_config.mutable_virtual_hosts(0)->add_routes();
route3->mutable_match()->set_path("/grpc.testing.EchoTest3Service/Echo3");
route3->mutable_route()->set_cluster(kDefaultResourceName);
auto* default_route = new_route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
Listener listener =
balancers_[0]->ads_service()->BuildListener(new_route_config);
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
WaitForAllBackends(0, 2);
CheckRpcSendOk(kNumEchoRpcs, RpcOptions().set_wait_for_ready(true));
CheckRpcSendOk(kNumEcho1Rpcs, RpcOptions()
.set_rpc_service(SERVICE_ECHO1)
.set_rpc_method(METHOD_ECHO1)
.set_wait_for_ready(true));
CheckRpcSendOk(kNumEcho2Rpcs, RpcOptions()
.set_rpc_service(SERVICE_ECHO2)
.set_rpc_method(METHOD_ECHO2)
.set_wait_for_ready(true));
// Make sure RPCs all go to the correct backend.
for (size_t i = 0; i < 2; ++i) {
EXPECT_EQ(kNumEchoRpcs / 2,
backends_[i]->backend_service()->request_count());
EXPECT_EQ(0, backends_[i]->backend_service1()->request_count());
EXPECT_EQ(0, backends_[i]->backend_service2()->request_count());
}
EXPECT_EQ(0, backends_[2]->backend_service()->request_count());
EXPECT_EQ(kNumEcho1Rpcs, backends_[2]->backend_service1()->request_count());
EXPECT_EQ(0, backends_[2]->backend_service2()->request_count());
EXPECT_EQ(0, backends_[3]->backend_service()->request_count());
EXPECT_EQ(0, backends_[3]->backend_service1()->request_count());
EXPECT_EQ(kNumEcho2Rpcs, backends_[3]->backend_service2()->request_count());
}
TEST_P(LdsTest, XdsRoutingPrefixMatching) {
ResetStub(/*failover_timeout=*/0,
/*expected_targets=*/"",
/*xds_resource_does_not_exist_timeout*/ 0,
/*xds_routing_enabled=*/true);
const char* kNewCluster1Name = "new_cluster_1";
const char* kNewCluster2Name = "new_cluster_2";
const size_t kNumEcho1Rpcs = 10;
const size_t kNumEcho2Rpcs = 20;
const size_t kNumEchoRpcs = 30;
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// Populate new EDS resources.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 2)},
});
AdsServiceImpl::EdsResourceArgs args1({
{"locality0", GetBackendPorts(2, 3)},
});
AdsServiceImpl::EdsResourceArgs args2({
{"locality0", GetBackendPorts(3, 4)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args1, kNewCluster1Name),
kNewCluster1Name);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args2, kNewCluster2Name),
kNewCluster2Name);
// Populate new CDS resources.
Cluster new_cluster1 = balancers_[0]->ads_service()->default_cluster();
new_cluster1.set_name(kNewCluster1Name);
balancers_[0]->ads_service()->SetCdsResource(new_cluster1, kNewCluster1Name);
Cluster new_cluster2 = balancers_[0]->ads_service()->default_cluster();
new_cluster2.set_name(kNewCluster2Name);
balancers_[0]->ads_service()->SetCdsResource(new_cluster2, kNewCluster2Name);
// Populating Route Configurations for LDS.
RouteConfiguration new_route_config =
balancers_[0]->ads_service()->default_route_config();
auto* route1 = new_route_config.mutable_virtual_hosts(0)->mutable_routes(0);
route1->mutable_match()->set_prefix("/grpc.testing.EchoTest1Service/");
route1->mutable_route()->set_cluster(kNewCluster1Name);
auto* route2 = new_route_config.mutable_virtual_hosts(0)->add_routes();
route2->mutable_match()->set_prefix("/grpc.testing.EchoTest2Service/");
route2->mutable_route()->set_cluster(kNewCluster2Name);
auto* default_route = new_route_config.mutable_virtual_hosts(0)->add_routes();
default_route->mutable_match()->set_prefix("");
default_route->mutable_route()->set_cluster(kDefaultResourceName);
Listener listener =
balancers_[0]->ads_service()->BuildListener(new_route_config);
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
WaitForAllBackends(0, 2);
CheckRpcSendOk(kNumEchoRpcs, RpcOptions().set_wait_for_ready(true));
CheckRpcSendOk(
kNumEcho1Rpcs,
RpcOptions().set_rpc_service(SERVICE_ECHO1).set_wait_for_ready(true));
CheckRpcSendOk(
kNumEcho2Rpcs,
RpcOptions().set_rpc_service(SERVICE_ECHO2).set_wait_for_ready(true));
// Make sure RPCs all go to the correct backend.
for (size_t i = 0; i < 2; ++i) {
EXPECT_EQ(kNumEchoRpcs / 2,
backends_[i]->backend_service()->request_count());
EXPECT_EQ(0, backends_[i]->backend_service1()->request_count());
EXPECT_EQ(0, backends_[i]->backend_service2()->request_count());
}
EXPECT_EQ(0, backends_[2]->backend_service()->request_count());
EXPECT_EQ(kNumEcho1Rpcs, backends_[2]->backend_service1()->request_count());
EXPECT_EQ(0, backends_[2]->backend_service2()->request_count());
EXPECT_EQ(0, backends_[3]->backend_service()->request_count());
EXPECT_EQ(0, backends_[3]->backend_service1()->request_count());
EXPECT_EQ(kNumEcho2Rpcs, backends_[3]->backend_service2()->request_count());
}
using RdsTest = BasicTest;
// Tests that RDS client should send an ACK upon correct RDS response.
TEST_P(RdsTest, Vanilla) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that RDS client should send a NACK if matching domain can't be found in
// the RDS response.
TEST_P(RdsTest, NoMatchedDomain) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)->clear_domains();
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that RDS client should choose the virtual host with matching domain if
// multiple virtual hosts exist in the RDS response.
TEST_P(RdsTest, ChooseMatchedDomain) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
*(route_config.add_virtual_hosts()) = route_config.virtual_hosts(0);
route_config.mutable_virtual_hosts(0)->clear_domains();
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that RDS client should choose the last route in the virtual host if
// multiple routes exist in the RDS response.
TEST_P(RdsTest, ChooseLastRoute) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
*(route_config.mutable_virtual_hosts(0)->add_routes()) =
route_config.virtual_hosts(0).routes(0);
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that RDS client should send a NACK if route match has non-empty prefix
// as the only route (default) in the RDS response.
TEST_P(RdsTest, RouteMatchHasNonemptyPrefix) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_match()
->set_prefix("/nonempty_prefix/");
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that RDS client should send a NACK if route has an action other than
// RouteAction in the RDS response.
TEST_P(RdsTest, RouteHasNoRouteAction) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)->mutable_routes(0)->mutable_redirect();
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that RDS client should send a NACK if RouteAction has a
// cluster_specifier other than cluster in the RDS response.
TEST_P(RdsTest, RouteActionHasNoCluster) {
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
RouteConfiguration route_config =
balancers_[0]->ads_service()->default_route_config();
route_config.mutable_virtual_hosts(0)
->mutable_routes(0)
->mutable_route()
->mutable_cluster_header();
balancers_[0]->ads_service()->SetRdsResource(route_config,
kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that RDS client times out when no response received.
TEST_P(RdsTest, Timeout) {
ResetStub(0, "", 500);
balancers_[0]->ads_service()->SetResourceIgnore(kRdsTypeUrl);
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
}
using CdsTest = BasicTest;
// Tests that CDS client should send an ACK upon correct CDS response.
TEST_P(CdsTest, Vanilla) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
(void)SendRpc();
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::ACKED);
}
// Tests that CDS client should send a NACK if the cluster type in CDS response
// is other than EDS.
TEST_P(CdsTest, WrongClusterType) {
auto cluster = balancers_[0]->ads_service()->default_cluster();
cluster.set_type(envoy::api::v2::Cluster::STATIC);
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that CDS client should send a NACK if the eds_config in CDS response is
// other than ADS.
TEST_P(CdsTest, WrongEdsConfig) {
auto cluster = balancers_[0]->ads_service()->default_cluster();
cluster.mutable_eds_cluster_config()->mutable_eds_config()->mutable_self();
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that CDS client should send a NACK if the lb_policy in CDS response is
// other than ROUND_ROBIN.
TEST_P(CdsTest, WrongLbPolicy) {
auto cluster = balancers_[0]->ads_service()->default_cluster();
cluster.set_lb_policy(envoy::api::v2::Cluster::LEAST_REQUEST);
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that CDS client should send a NACK if the lrs_server in CDS response is
// other than SELF.
TEST_P(CdsTest, WrongLrsServer) {
auto cluster = balancers_[0]->ads_service()->default_cluster();
cluster.mutable_lrs_server()->mutable_ads();
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
AdsServiceImpl::NACKED);
}
// Tests that CDS client times out when no response received.
TEST_P(CdsTest, Timeout) {
ResetStub(0, "", 500);
balancers_[0]->ads_service()->SetResourceIgnore(kCdsTypeUrl);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
}
using EdsTest = BasicTest;
TEST_P(EdsTest, Timeout) {
ResetStub(0, "", 500);
balancers_[0]->ads_service()->SetResourceIgnore(kEdsTypeUrl);
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
CheckRpcSendFailure();
}
// Tests that EDS client should send a NACK if the EDS update contains
// sparse priorities.
TEST_P(EdsTest, NacksSparsePriorityList) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(), kDefaultLocalityWeight, 1},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
CheckRpcSendFailure();
EXPECT_EQ(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NACKED);
}
using LocalityMapTest = BasicTest;
// Tests that the localities in a locality map are picked according to their
// weights.
TEST_P(LocalityMapTest, WeightedRoundRobin) {
SetNextResolution({});
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;
// ADS response contains 2 localities, each of which contains 1 backend.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1), kLocalityWeight0},
{"locality1", GetBackendPorts(1, 2), kLocalityWeight1},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Wait for both backends to be ready.
WaitForAllBackends(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))));
}
// Tests that we correctly handle a locality containing no endpoints.
TEST_P(LocalityMapTest, LocalityContainingNoEndpoints) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 5000;
// EDS response contains 2 localities, one with no endpoints.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
{"locality1", {}},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Wait for both backends to be ready.
WaitForAllBackends();
// Send kNumRpcs RPCs.
CheckRpcSendOk(kNumRpcs);
// All traffic should go to the reachable locality.
EXPECT_EQ(backends_[0]->backend_service()->request_count(),
kNumRpcs / backends_.size());
EXPECT_EQ(backends_[1]->backend_service()->request_count(),
kNumRpcs / backends_.size());
EXPECT_EQ(backends_[2]->backend_service()->request_count(),
kNumRpcs / backends_.size());
EXPECT_EQ(backends_[3]->backend_service()->request_count(),
kNumRpcs / backends_.size());
}
// EDS update with no localities.
TEST_P(LocalityMapTest, NoLocalities) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// EDS response contains 2 localities, one with no endpoints.
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource({}), kDefaultResourceName);
Status status = SendRpc();
EXPECT_FALSE(status.ok());
EXPECT_EQ(status.error_code(), StatusCode::UNAVAILABLE);
}
// Tests that the locality map can work properly even when it contains a large
// number of localities.
TEST_P(LocalityMapTest, StressTest) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumLocalities = 100;
// The first ADS response contains kNumLocalities localities, each of which
// contains backend 0.
AdsServiceImpl::EdsResourceArgs args;
for (size_t i = 0; i < kNumLocalities; ++i) {
std::string name = absl::StrCat("locality", i);
AdsServiceImpl::EdsResourceArgs::Locality locality(name,
{backends_[0]->port()});
args.locality_list.emplace_back(std::move(locality));
}
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// The second ADS response contains 1 locality, which contains backend 1.
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", GetBackendPorts(1, 2)},
});
std::thread delayed_resource_setter(std::bind(
&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), 60 * 1000, kDefaultResourceName));
// 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);
delayed_resource_setter.join();
}
// Tests that the localities in a locality map are picked correctly after update
// (addition, modification, deletion).
TEST_P(LocalityMapTest, UpdateMap) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 3000;
// 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);
}
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1), 2},
{"locality1", GetBackendPorts(1, 2), 3},
{"locality2", GetBackendPorts(2, 3), 4},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Wait for the first 3 backends to be ready.
WaitForAllBackends(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) {
gpr_log(GPR_INFO, "Locality %" PRIuPTR " rate %f", i,
locality_picked_rates[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))));
}
args = AdsServiceImpl::EdsResourceArgs({
{"locality1", GetBackendPorts(1, 2), 3},
{"locality2", GetBackendPorts(2, 3), 2},
{"locality3", GetBackendPorts(3, 4), 6},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Backend 3 hasn't received any request.
EXPECT_EQ(0U, backends_[3]->backend_service()->request_count());
// Wait until the locality update has been processed, as signaled by backend 3
// receiving a request.
WaitForAllBackends(3, 4);
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) {
gpr_log(GPR_INFO, "Locality %" PRIuPTR " rate %f", i,
locality_picked_rates[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))));
}
}
// Tests that we don't fail RPCs when replacing all of the localities in
// a given priority.
TEST_P(LocalityMapTest, ReplaceAllLocalitiesInPriority) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"locality1", GetBackendPorts(1, 2)},
});
std::thread delayed_resource_setter(std::bind(
&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), 5000, kDefaultResourceName));
// Wait for the first backend to be ready.
WaitForBackend(0);
// Keep sending RPCs until we switch over to backend 1, which tells us
// that we received the update. No RPCs should fail during this
// transition.
WaitForBackend(1, /*reset_counters=*/true, /*require_success=*/true);
delayed_resource_setter.join();
}
class FailoverTest : public BasicTest {
public:
void SetUp() override {
BasicTest::SetUp();
ResetStub(100, "");
}
};
// Localities with the highest priority are used when multiple priority exist.
TEST_P(FailoverTest, ChooseHighestPriority) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs 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},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
WaitForBackend(3, false);
for (size_t i = 0; i < 3; ++i) {
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
}
}
// Does not choose priority with no endpoints.
TEST_P(FailoverTest, DoesNotUsePriorityWithNoEndpoints) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
{"locality3", {}, kDefaultLocalityWeight, 0},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
WaitForBackend(0, false);
for (size_t i = 1; i < 3; ++i) {
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
}
}
// Does not choose locality with no endpoints.
TEST_P(FailoverTest, DoesNotUseLocalityWithNoEndpoints) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", {}, kDefaultLocalityWeight, 0},
{"locality1", GetBackendPorts(), kDefaultLocalityWeight, 0},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Wait for all backends to be used.
std::tuple<int, int, int> counts = WaitForAllBackends();
// Make sure no RPCs failed in the transition.
EXPECT_EQ(0, std::get<1>(counts));
}
// If the higher priority localities are not reachable, failover to the highest
// priority among the rest.
TEST_P(FailoverTest, Failover) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs 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);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
WaitForBackend(1, false);
for (size_t i = 0; i < 4; ++i) {
if (i == 1) continue;
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
}
}
// If a locality with higher priority than the current one becomes ready,
// switch to it.
TEST_P(FailoverTest, SwitchBackToHigherPriority) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 100;
AdsServiceImpl::EdsResourceArgs 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);
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
WaitForBackend(1, false);
for (size_t i = 0; i < 4; ++i) {
if (i == 1) continue;
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
}
StartBackend(0);
WaitForBackend(0);
CheckRpcSendOk(kNumRpcs);
EXPECT_EQ(kNumRpcs, backends_[0]->backend_service()->request_count());
}
// The first update only contains unavailable priorities. The second update
// contains available priorities.
TEST_P(FailoverTest, UpdateInitialUnavailable) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 1},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"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);
std::thread delayed_resource_setter(std::bind(
&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
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(0U, backends_[i]->backend_service()->request_count());
}
delayed_resource_setter.join();
}
// Tests that after the localities' priorities are updated, we still choose the
// highest READY priority with the updated localities.
TEST_P(FailoverTest, UpdatePriority) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 100;
AdsServiceImpl::EdsResourceArgs 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},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 2},
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 0},
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 1},
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 3},
});
std::thread delayed_resource_setter(std::bind(
&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
WaitForBackend(3, false);
for (size_t i = 0; i < 3; ++i) {
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
}
WaitForBackend(1);
CheckRpcSendOk(kNumRpcs);
EXPECT_EQ(kNumRpcs, backends_[1]->backend_service()->request_count());
delayed_resource_setter.join();
}
// Moves all localities in the current priority to a higher priority.
TEST_P(FailoverTest, MoveAllLocalitiesInCurrentPriorityToHigherPriority) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
// First update:
// - Priority 0 is locality 0, containing backend 0, which is down.
// - Priority 1 is locality 1, containing backends 1 and 2, which are up.
ShutdownBackend(0);
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
{"locality1", GetBackendPorts(1, 3), kDefaultLocalityWeight, 1},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Second update:
// - Priority 0 contains both localities 0 and 1.
// - Priority 1 is not present.
// - We add backend 3 to locality 1, just so we have a way to know
// when the update has been seen by the client.
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
{"locality1", GetBackendPorts(1, 4), kDefaultLocalityWeight, 0},
});
std::thread delayed_resource_setter(std::bind(
&BasicTest::SetEdsResourceWithDelay, this, 0,
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
// When we get the first update, all backends in priority 0 are down,
// so we will create priority 1. Backends 1 and 2 should have traffic,
// but backend 3 should not.
WaitForAllBackends(1, 3, false);
EXPECT_EQ(0UL, backends_[3]->backend_service()->request_count());
// When backend 3 gets traffic, we know the second update has been seen.
WaitForBackend(3);
// The ADS service of balancer 0 got at least 1 response.
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
delayed_resource_setter.join();
}
using DropTest = BasicTest;
// Tests that RPCs are dropped according to the drop config.
TEST_P(DropTest, Vanilla) {
SetNextResolution({});
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 ADS response contains two drop categories.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
{kThrottleDropType, kDropPerMillionForThrottle}};
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
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(RpcOptions(), &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))));
}
// Tests that drop config is converted correctly from per hundred.
TEST_P(DropTest, DropPerHundred) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 5000;
const uint32_t kDropPerHundredForLb = 10;
const double kDropRateForLb = kDropPerHundredForLb / 100.0;
// The ADS response contains one drop category.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
args.drop_categories = {{kLbDropType, kDropPerHundredForLb}};
args.drop_denominator = FractionalPercent::HUNDRED;
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
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(RpcOptions(), &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))));
}
// Tests that drop config is converted correctly from per ten thousand.
TEST_P(DropTest, DropPerTenThousand) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 5000;
const uint32_t kDropPerTenThousandForLb = 1000;
const double kDropRateForLb = kDropPerTenThousandForLb / 10000.0;
// The ADS response contains one drop category.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
args.drop_categories = {{kLbDropType, kDropPerTenThousandForLb}};
args.drop_denominator = FractionalPercent::TEN_THOUSAND;
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
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(RpcOptions(), &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))));
}
// Tests that drop is working correctly after update.
TEST_P(DropTest, Update) {
SetNextResolution({});
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 first ADS response contains one drop category.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}};
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
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(RpcOptions(), &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;
gpr_log(GPR_INFO, "First batch drop rate %f", seen_drop_rate);
const double kErrorTolerance = 0.3;
EXPECT_THAT(
seen_drop_rate,
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
// The second ADS response contains two drop categories, send an update EDS
// response.
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
{kThrottleDropType, kDropPerMillionForThrottle}};
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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(RpcOptions(), &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(RpcOptions(), &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;
gpr_log(GPR_INFO, "Second batch drop rate %f", seen_drop_rate);
EXPECT_THAT(
seen_drop_rate,
::testing::AllOf(
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
}
// Tests that all the RPCs are dropped if any drop category drops 100%.
TEST_P(DropTest, DropAll) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
const size_t kNumRpcs = 1000;
const uint32_t kDropPerMillionForLb = 100000;
const uint32_t kDropPerMillionForThrottle = 1000000;
// The ADS response contains two drop categories.
AdsServiceImpl::EdsResourceArgs args;
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
{kThrottleDropType, kDropPerMillionForThrottle}};
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// Send kNumRpcs RPCs and all of them are dropped.
for (size_t i = 0; i < kNumRpcs; ++i) {
EchoResponse response;
const Status status = SendRpc(RpcOptions(), &response);
EXPECT_EQ(status.error_code(), StatusCode::UNAVAILABLE);
EXPECT_EQ(status.error_message(), "Call dropped by load balancing policy");
}
}
class BalancerUpdateTest : public XdsEnd2endTest {
public:
BalancerUpdateTest() : XdsEnd2endTest(4, 3) {}
};
// Tests that the old LB call is still used after the balancer address update as
// long as that call is still alive.
TEST_P(BalancerUpdateTest, UpdateBalancersButKeepUsingOriginalBalancer) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", {backends_[0]->port()}},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", {backends_[1]->port()}},
});
balancers_[1]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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 ADS service of balancer 0 sent at least 1 response.
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
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());
// The ADS service of balancer 0 sent at least 1 response.
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
}
// 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_P(BalancerUpdateTest, Repeated) {
SetNextResolution({});
SetNextResolutionForLbChannelAllBalancers();
AdsServiceImpl::EdsResourceArgs args({
{"locality0", {backends_[0]->port()}},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", {backends_[1]->port()}},
});
balancers_[1]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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 ADS service of balancer 0 sent at least 1 response.
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
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 is down, the RPCs will still be sent to the
// backends according to the last balancer response, until a new balancer is
// reachable.
TEST_P(BalancerUpdateTest, DeadUpdate) {
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
AdsServiceImpl::EdsResourceArgs args({
{"locality0", {backends_[0]->port()}},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", {backends_[1]->port()}},
});
balancers_[1]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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());
// The ADS service of balancer 0 sent at least 1 response.
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
// 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 ADS service of no balancers sent anything
EXPECT_EQ(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
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());
// The ADS service of balancer 1 sent at least 1 response.
EXPECT_EQ(balancers_[0]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_GT(balancers_[1]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
AdsServiceImpl::NOT_SENT);
}
// The re-resolution tests are deferred because they rely on the fallback mode,
// which hasn't been supported.
// TODO(juanlishen): Add TEST_P(BalancerUpdateTest, ReresolveDeadBackend).
// TODO(juanlishen): Add TEST_P(UpdatesWithClientLoadReportingTest,
// ReresolveDeadBalancer)
class ClientLoadReportingTest : public XdsEnd2endTest {
public:
ClientLoadReportingTest() : XdsEnd2endTest(4, 1, 3) {}
};
// Tests that the load report received at the balancer is correct.
TEST_P(ClientLoadReportingTest, Vanilla) {
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
const size_t kNumRpcsPerAddress = 10;
const size_t kNumFailuresPerAddress = 3;
// TODO(juanlishen): Partition the backends after multiple localities is
// tested.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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_);
CheckRpcSendFailure(kNumFailuresPerAddress * num_backends_,
/*server_fail=*/true);
// Check that each backend got the right number of requests.
for (size_t i = 0; i < backends_.size(); ++i) {
EXPECT_EQ(kNumRpcsPerAddress + kNumFailuresPerAddress,
backends_[i]->backend_service()->request_count());
}
// The load report received at the balancer should be correct.
std::vector<ClientStats> load_report =
balancers_[0]->lrs_service()->WaitForLoadReport();
ASSERT_EQ(load_report.size(), 1UL);
ClientStats& client_stats = load_report.front();
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
client_stats.total_successful_requests());
EXPECT_EQ(0U, client_stats.total_requests_in_progress());
EXPECT_EQ((kNumRpcsPerAddress + kNumFailuresPerAddress) * num_backends_ +
num_ok + num_failure,
client_stats.total_issued_requests());
EXPECT_EQ(kNumFailuresPerAddress * num_backends_ + num_failure,
client_stats.total_error_requests());
EXPECT_EQ(0U, client_stats.total_dropped_requests());
// 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());
}
// Tests that we don't include stats for clusters that are not requested
// by the LRS server.
TEST_P(ClientLoadReportingTest, HonorsClustersRequestedByLrsServer) {
balancers_[0]->lrs_service()->set_cluster_names({"bogus"});
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
const size_t kNumRpcsPerAddress = 100;
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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 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.
std::vector<ClientStats> load_report =
balancers_[0]->lrs_service()->WaitForLoadReport();
ASSERT_EQ(load_report.size(), 0UL);
}
// Tests that if the balancer restarts, the client load report contains the
// stats before and after the restart correctly.
TEST_P(ClientLoadReportingTest, BalancerRestart) {
SetNextResolution({});
SetNextResolutionForLbChannel({balancers_[0]->port()});
const size_t kNumBackendsFirstPass = backends_.size() / 2;
const size_t kNumBackendsSecondPass =
backends_.size() - kNumBackendsFirstPass;
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts(0, kNumBackendsFirstPass)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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(/* start_index */ 0,
/* stop_index */ kNumBackendsFirstPass);
std::vector<ClientStats> load_report =
balancers_[0]->lrs_service()->WaitForLoadReport();
ASSERT_EQ(load_report.size(), 1UL);
ClientStats client_stats = std::move(load_report.front());
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();
// We should continue using the last EDS response we received from the
// balancer before it was shut down.
// Note: We need to use WaitForAllBackends() here instead of just
// CheckRpcSendOk(kNumBackendsFirstPass), because when the balancer
// shuts down, the XdsClient will generate an error to the
// ServiceConfigWatcher, which will cause the xds resolver to send a
// no-op update to the LB policy. When this update gets down to the
// round_robin child policy for the locality, it will generate a new
// subchannel list, which resets the start index randomly. So we need
// to be a little more permissive here to avoid spurious failures.
ResetBackendCounters();
int num_started = std::get<0>(WaitForAllBackends(
/* start_index */ 0, /* stop_index */ kNumBackendsFirstPass));
// Now restart the balancer, this time pointing to the new backends.
balancers_[0]->Start();
args = AdsServiceImpl::EdsResourceArgs({
{"locality0", GetBackendPorts(kNumBackendsFirstPass)},
});
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
// 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(/* start_index */ kNumBackendsFirstPass);
num_started += num_ok + num_failure + num_drops;
// Send one RPC per backend.
CheckRpcSendOk(kNumBackendsSecondPass);
num_started += kNumBackendsSecondPass;
// Check client stats.
load_report = balancers_[0]->lrs_service()->WaitForLoadReport();
ASSERT_EQ(load_report.size(), 1UL);
client_stats = std::move(load_report.front());
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_P(ClientLoadReportingWithDropTest, Vanilla) {
SetNextResolution({});
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 ADS response contains two drop categories.
AdsServiceImpl::EdsResourceArgs args({
{"locality0", GetBackendPorts()},
});
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
{kThrottleDropType, kDropPerMillionForThrottle}};
balancers_[0]->ads_service()->SetEdsResource(
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
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(RpcOptions(), &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.
std::vector<ClientStats> load_report =
balancers_[0]->lrs_service()->WaitForLoadReport();
ASSERT_EQ(load_report.size(), 1UL);
ClientStats& client_stats = load_report.front();
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))));
}
grpc::string TestTypeName(const ::testing::TestParamInfo<TestType>& info) {
return info.param.AsString();
}
INSTANTIATE_TEST_SUITE_P(XdsTest, BasicTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, false),
TestType(true, true)),
&TestTypeName);
INSTANTIATE_TEST_SUITE_P(XdsTest, SecureNamingTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, false),
TestType(true, true)),
&TestTypeName);
// LDS depends on XdsResolver.
INSTANTIATE_TEST_SUITE_P(XdsTest, LdsTest,
::testing::Values(TestType(true, false),
TestType(true, true)),
&TestTypeName);
// RDS depends on XdsResolver.
INSTANTIATE_TEST_SUITE_P(XdsTest, RdsTest,
::testing::Values(TestType(true, false),
TestType(true, true)),
&TestTypeName);
// CDS depends on XdsResolver.
INSTANTIATE_TEST_SUITE_P(XdsTest, CdsTest,
::testing::Values(TestType(true, false),
TestType(true, true)),
&TestTypeName);
// EDS could be tested with or without XdsResolver, but the tests would
// be the same either way, so we test it only with XdsResolver.
INSTANTIATE_TEST_SUITE_P(XdsTest, EdsTest,
::testing::Values(TestType(true, false),
TestType(true, true)),
&TestTypeName);
// XdsResolverOnlyTest depends on XdsResolver.
INSTANTIATE_TEST_SUITE_P(XdsTest, XdsResolverOnlyTest,
::testing::Values(TestType(true, false),
TestType(true, true)),
&TestTypeName);
// XdsResolverLoadReprtingOnlyTest depends on XdsResolver and load reporting.
INSTANTIATE_TEST_SUITE_P(XdsTest, XdsResolverLoadReportingOnlyTest,
::testing::Values(TestType(true, true)),
&TestTypeName);
INSTANTIATE_TEST_SUITE_P(XdsTest, LocalityMapTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, false),
TestType(true, true)),
&TestTypeName);
INSTANTIATE_TEST_SUITE_P(XdsTest, FailoverTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, false),
TestType(true, true)),
&TestTypeName);
INSTANTIATE_TEST_SUITE_P(XdsTest, DropTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, false),
TestType(true, true)),
&TestTypeName);
INSTANTIATE_TEST_SUITE_P(XdsTest, BalancerUpdateTest,
::testing::Values(TestType(false, true),
TestType(false, false),
TestType(true, true)),
&TestTypeName);
// Load reporting tests are not run with load reporting disabled.
INSTANTIATE_TEST_SUITE_P(XdsTest, ClientLoadReportingTest,
::testing::Values(TestType(false, true),
TestType(true, true)),
&TestTypeName);
// Load reporting tests are not run with load reporting disabled.
INSTANTIATE_TEST_SUITE_P(XdsTest, ClientLoadReportingWithDropTest,
::testing::Values(TestType(false, true),
TestType(true, true)),
&TestTypeName);
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(argc, argv);
::testing::InitGoogleTest(&argc, argv);
grpc::testing::WriteBootstrapFiles();
grpc::testing::g_port_saver = new grpc::testing::PortSaver();
const auto result = RUN_ALL_TESTS();
return result;
}