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// Copyright 2023 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 <string>
#include <vector>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/strings/str_cat.h"
#include "absl/strings/str_format.h"
#include <grpc/event_engine/endpoint_config.h>
#include <grpcpp/ext/server_metric_recorder.h>
#include "src/core/ext/filters/client_channel/backup_poller.h"
#include "src/core/lib/config/config_vars.h"
#include "src/proto/grpc/testing/xds/v3/client_side_weighted_round_robin.grpc.pb.h"
#include "src/proto/grpc/testing/xds/v3/wrr_locality.grpc.pb.h"
#include "test/core/util/scoped_env_var.h"
#include "test/cpp/end2end/xds/xds_end2end_test_lib.h"
namespace grpc {
namespace testing {
namespace {
using ::envoy::extensions::load_balancing_policies::
client_side_weighted_round_robin::v3::ClientSideWeightedRoundRobin;
using ::envoy::extensions::load_balancing_policies::wrr_locality::v3::
WrrLocality;
using ::grpc_core::testing::ScopedExperimentalEnvVar;
using WrrTest = XdsEnd2endTest;
INSTANTIATE_TEST_SUITE_P(XdsTest, WrrTest, ::testing::Values(XdsTestType()),
&XdsTestType::Name);
TEST_P(WrrTest, Basic) {
ScopedExperimentalEnvVar env_var1("GRPC_EXPERIMENTAL_XDS_CUSTOM_LB_CONFIG");
ScopedExperimentalEnvVar env_var2("GRPC_EXPERIMENTAL_XDS_WRR_LB");
CreateAndStartBackends(3);
backends_[0]->server_metric_recorder()->SetQps(100);
backends_[0]->server_metric_recorder()->SetCpuUtilization(0.9);
backends_[1]->server_metric_recorder()->SetQps(100);
backends_[1]->server_metric_recorder()->SetCpuUtilization(0.3);
backends_[2]->server_metric_recorder()->SetQps(100);
backends_[2]->server_metric_recorder()->SetCpuUtilization(0.3);
auto cluster = default_cluster_;
WrrLocality wrr_locality;
wrr_locality.mutable_endpoint_picking_policy()
->add_policies()
->mutable_typed_extension_config()
->mutable_typed_config()
->PackFrom(ClientSideWeightedRoundRobin());
cluster.mutable_load_balancing_policy()
->add_policies()
->mutable_typed_extension_config()
->mutable_typed_config()
->PackFrom(wrr_locality);
balancer_->ads_service()->SetCdsResource(cluster);
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}});
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args));
size_t num_picks = 0;
SendRpcsUntil(DEBUG_LOCATION, [&](const RpcResult&) {
if (++num_picks == 7) {
gpr_log(GPR_INFO, "request counts: %" PRIuPTR " %" PRIuPTR " %" PRIuPTR,
backends_[0]->backend_service()->request_count(),
backends_[1]->backend_service()->request_count(),
backends_[2]->backend_service()->request_count());
if (backends_[0]->backend_service()->request_count() == 1 &&
backends_[1]->backend_service()->request_count() == 3 &&
backends_[2]->backend_service()->request_count() == 3) {
return false;
}
num_picks = 0;
ResetBackendCounters();
}
return true;
});
}
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(&argc, argv);
::testing::InitGoogleTest(&argc, argv);
// Make the backup poller poll very frequently in order to pick up
// updates from all the subchannels's FDs.
grpc_core::ConfigVars::Overrides overrides;
overrides.client_channel_backup_poll_interval_ms = 1;
grpc_core::ConfigVars::SetOverrides(overrides);
#if TARGET_OS_IPHONE
// Workaround Apple CFStream bug
grpc_core::SetEnv("grpc_cfstream", "0");
#endif
grpc_init();
const auto result = RUN_ALL_TESTS();
grpc_shutdown();
return result;
}