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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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1689 lines
75 KiB
1689 lines
75 KiB
// Copyright 2017 gRPC authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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#include <numeric> |
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#include <string> |
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#include <vector> |
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#include <gmock/gmock.h> |
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#include <gtest/gtest.h> |
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#include "absl/strings/match.h" |
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#include "absl/strings/str_cat.h" |
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#include "src/core/ext/filters/client_channel/backup_poller.h" |
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#include "src/core/lib/address_utils/sockaddr_utils.h" |
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#include "test/cpp/end2end/connection_attempt_injector.h" |
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#include "test/cpp/end2end/xds/xds_end2end_test_lib.h" |
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namespace grpc { |
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namespace testing { |
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namespace { |
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using ::envoy::config::cluster::v3::CircuitBreakers; |
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using ::envoy::config::cluster::v3::RoutingPriority; |
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using ::envoy::config::endpoint::v3::HealthStatus; |
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using ::envoy::type::v3::FractionalPercent; |
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using ClientStats = LrsServiceImpl::ClientStats; |
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constexpr char kLbDropType[] = "lb"; |
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constexpr char kThrottleDropType[] = "throttle"; |
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constexpr char kStatusMessageDropPrefix[] = "EDS-configured drop: "; |
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// |
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// CDS tests |
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// |
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using CdsTest = XdsEnd2endTest; |
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INSTANTIATE_TEST_SUITE_P(XdsTest, CdsTest, ::testing::Values(XdsTestType()), |
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&XdsTestType::Name); |
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// Tests that CDS client should send an ACK upon correct CDS response. |
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TEST_P(CdsTest, Vanilla) { |
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(void)SendRpc(); |
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auto response_state = balancer_->ads_service()->cds_response_state(); |
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ASSERT_TRUE(response_state.has_value()); |
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EXPECT_EQ(response_state->state, AdsServiceImpl::ResponseState::ACKED); |
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} |
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// Testing just one example of an invalid resource here. |
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// Unit tests for XdsClusterResourceType have exhaustive tests for all |
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// of the invalid cases. |
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TEST_P(CdsTest, InvalidClusterResource) { |
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auto cluster = default_cluster_; |
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cluster.set_type(Cluster::STATIC); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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const auto response_state = WaitForCdsNack(DEBUG_LOCATION); |
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ASSERT_TRUE(response_state.has_value()) << "timed out waiting for NACK"; |
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EXPECT_EQ(response_state->error_message, |
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"xDS response validation errors: [" |
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"resource index 0: cluster_name: " |
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"INVALID_ARGUMENT: errors validating Cluster resource: [" |
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"field:type error:unknown discovery type]]"); |
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} |
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// Tests that we don't trigger does-not-exist callbacks for a resource |
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// that was previously valid but is updated to be invalid. |
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TEST_P(CdsTest, InvalidClusterStillExistsIfPreviouslyCached) { |
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CreateAndStartBackends(1); |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Check that everything works. |
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CheckRpcSendOk(DEBUG_LOCATION); |
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// Now send an update changing the Cluster to be invalid. |
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auto cluster = default_cluster_; |
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cluster.set_type(Cluster::STATIC); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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const auto response_state = |
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WaitForCdsNack(DEBUG_LOCATION, RpcOptions(), StatusCode::OK); |
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ASSERT_TRUE(response_state.has_value()) << "timed out waiting for NACK"; |
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EXPECT_EQ(response_state->error_message, |
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"xDS response validation errors: [" |
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"resource index 0: cluster_name: " |
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"INVALID_ARGUMENT: errors validating Cluster resource: [" |
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"field:type error:unknown discovery type]]"); |
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CheckRpcSendOk(DEBUG_LOCATION); |
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} |
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// Tests round robin is not implacted by the endpoint weight, and that the |
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// localities in a locality map are picked according to their weights. |
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TEST_P(CdsTest, EndpointWeightDoesNotImpactWeightedRoundRobin) { |
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CreateAndStartBackends(2); |
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const int kLocalityWeight0 = 2; |
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const int kLocalityWeight1 = 8; |
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const int kTotalLocalityWeight = kLocalityWeight0 + kLocalityWeight1; |
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const double kLocalityWeightRate0 = |
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static_cast<double>(kLocalityWeight0) / kTotalLocalityWeight; |
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const double kLocalityWeightRate1 = |
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static_cast<double>(kLocalityWeight1) / kTotalLocalityWeight; |
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const double kErrorTolerance = 0.05; |
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const size_t kNumRpcs = |
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ComputeIdealNumRpcs(kLocalityWeightRate0, kErrorTolerance); |
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// ADS response contains 2 localities, each of which contains 1 backend. |
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EdsResourceArgs args({ |
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{"locality0", |
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{CreateEndpoint(0, HealthStatus::UNKNOWN, 8)}, |
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kLocalityWeight0}, |
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{"locality1", |
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{CreateEndpoint(1, HealthStatus::UNKNOWN, 2)}, |
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kLocalityWeight1}, |
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}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Wait for both backends to be ready. |
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WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
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// Send kNumRpcs RPCs. |
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CheckRpcSendOk(DEBUG_LOCATION, kNumRpcs); |
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// The locality picking rates should be roughly equal to the expectation. |
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const double locality_picked_rate_0 = |
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static_cast<double>(backends_[0]->backend_service()->request_count()) / |
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kNumRpcs; |
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const double locality_picked_rate_1 = |
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static_cast<double>(backends_[1]->backend_service()->request_count()) / |
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kNumRpcs; |
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EXPECT_THAT(locality_picked_rate_0, |
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::testing::DoubleNear(kLocalityWeightRate0, kErrorTolerance)); |
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EXPECT_THAT(locality_picked_rate_1, |
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::testing::DoubleNear(kLocalityWeightRate1, kErrorTolerance)); |
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} |
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// In most of our tests, we use different names for different resource |
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// types, to make sure that there are no cut-and-paste errors in the code |
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// that cause us to look at data for the wrong resource type. So we add |
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// this test to make sure that the EDS resource name defaults to the |
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// cluster name if not specified in the CDS resource. |
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TEST_P(CdsTest, EdsServiceNameDefaultsToClusterName) { |
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CreateAndStartBackends(1); |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource( |
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BuildEdsResource(args, kDefaultClusterName)); |
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Cluster cluster = default_cluster_; |
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cluster.mutable_eds_cluster_config()->clear_service_name(); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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CheckRpcSendOk(DEBUG_LOCATION, /*times=*/1, |
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RpcOptions().set_timeout_ms(5000)); |
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} |
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// Tests switching over from one cluster to another. |
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TEST_P(CdsTest, ChangeClusters) { |
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CreateAndStartBackends(2); |
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const char* kNewClusterName = "new_cluster_name"; |
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const char* kNewEdsServiceName = "new_eds_service_name"; |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 1)}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// We need to wait for all backends to come online. |
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WaitForAllBackends(DEBUG_LOCATION, 0, 1); |
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// Populate new EDS resource. |
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args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends(1, 2)}}); |
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balancer_->ads_service()->SetEdsResource( |
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BuildEdsResource(args, kNewEdsServiceName)); |
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// Populate new CDS resource. |
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Cluster new_cluster = default_cluster_; |
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new_cluster.set_name(kNewClusterName); |
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new_cluster.mutable_eds_cluster_config()->set_service_name( |
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kNewEdsServiceName); |
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balancer_->ads_service()->SetCdsResource(new_cluster); |
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// Change RDS resource to point to new cluster. |
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RouteConfiguration new_route_config = default_route_config_; |
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new_route_config.mutable_virtual_hosts(0) |
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->mutable_routes(0) |
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->mutable_route() |
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->set_cluster(kNewClusterName); |
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SetListenerAndRouteConfiguration(balancer_.get(), default_listener_, |
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new_route_config); |
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// Wait for all new backends to be used. |
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WaitForAllBackends(DEBUG_LOCATION, 1, 2); |
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} |
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TEST_P(CdsTest, CircuitBreaking) { |
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CreateAndStartBackends(1); |
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constexpr size_t kMaxConcurrentRequests = 10; |
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// Populate new EDS resources. |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Update CDS resource to set max concurrent request. |
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CircuitBreakers circuit_breaks; |
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Cluster cluster = default_cluster_; |
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auto* threshold = cluster.mutable_circuit_breakers()->add_thresholds(); |
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threshold->set_priority(RoutingPriority::DEFAULT); |
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threshold->mutable_max_requests()->set_value(kMaxConcurrentRequests); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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// Send exactly max_concurrent_requests long RPCs. |
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LongRunningRpc rpcs[kMaxConcurrentRequests]; |
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for (size_t i = 0; i < kMaxConcurrentRequests; ++i) { |
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rpcs[i].StartRpc(stub_.get()); |
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} |
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// Wait for all RPCs to be in flight. |
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while (backends_[0]->backend_service()->RpcsWaitingForClientCancel() < |
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kMaxConcurrentRequests) { |
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gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
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gpr_time_from_micros(1 * 1000, GPR_TIMESPAN))); |
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} |
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// Sending a RPC now should fail, the error message should tell us |
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// we hit the max concurrent requests limit and got dropped. |
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CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, |
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"circuit breaker drop"); |
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// Cancel one RPC to allow another one through. |
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rpcs[0].CancelRpc(); |
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CheckRpcSendOk(DEBUG_LOCATION); |
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// Clean up. |
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for (size_t i = 1; i < kMaxConcurrentRequests; ++i) { |
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rpcs[i].CancelRpc(); |
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} |
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} |
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TEST_P(CdsTest, CircuitBreakingMultipleChannelsShareCallCounter) { |
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CreateAndStartBackends(1); |
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constexpr size_t kMaxConcurrentRequests = 10; |
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// Populate new EDS resources. |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Update CDS resource to set max concurrent request. |
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CircuitBreakers circuit_breaks; |
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Cluster cluster = default_cluster_; |
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auto* threshold = cluster.mutable_circuit_breakers()->add_thresholds(); |
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threshold->set_priority(RoutingPriority::DEFAULT); |
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threshold->mutable_max_requests()->set_value(kMaxConcurrentRequests); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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auto channel2 = CreateChannel(); |
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auto stub2 = grpc::testing::EchoTestService::NewStub(channel2); |
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// Send exactly max_concurrent_requests long RPCs, alternating between |
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// the two channels. |
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LongRunningRpc rpcs[kMaxConcurrentRequests]; |
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for (size_t i = 0; i < kMaxConcurrentRequests; ++i) { |
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rpcs[i].StartRpc(i % 2 == 0 ? stub_.get() : stub2.get()); |
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} |
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// Wait for all RPCs to be in flight. |
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while (backends_[0]->backend_service()->RpcsWaitingForClientCancel() < |
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kMaxConcurrentRequests) { |
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gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
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gpr_time_from_micros(1 * 1000, GPR_TIMESPAN))); |
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} |
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// Sending a RPC now should fail, the error message should tell us |
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// we hit the max concurrent requests limit and got dropped. |
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CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, |
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"circuit breaker drop"); |
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// Cancel one RPC to allow another one through |
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rpcs[0].CancelRpc(); |
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CheckRpcSendOk(DEBUG_LOCATION); |
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// Clean up. |
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for (size_t i = 1; i < kMaxConcurrentRequests; ++i) { |
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rpcs[i].CancelRpc(); |
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} |
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} |
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TEST_P(CdsTest, ClusterChangeAfterAdsCallFails) { |
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CreateAndStartBackends(2); |
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const char* kNewEdsResourceName = "new_eds_resource_name"; |
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// Populate EDS resources. |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 1)}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Check that the channel is working. |
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CheckRpcSendOk(DEBUG_LOCATION); |
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// Stop and restart the balancer. |
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balancer_->Shutdown(); |
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balancer_->Start(); |
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// Create new EDS resource. |
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args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends(1, 2)}}); |
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balancer_->ads_service()->SetEdsResource( |
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BuildEdsResource(args, kNewEdsResourceName)); |
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// Change CDS resource to point to new EDS resource. |
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auto cluster = default_cluster_; |
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cluster.mutable_eds_cluster_config()->set_service_name(kNewEdsResourceName); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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// Make sure client sees the change. |
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WaitForBackend(DEBUG_LOCATION, 1); |
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} |
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// |
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// CDS deletion tests |
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// |
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class CdsDeletionTest : public XdsEnd2endTest { |
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protected: |
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void SetUp() override {} // Individual tests call InitClient(). |
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}; |
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INSTANTIATE_TEST_SUITE_P(XdsTest, CdsDeletionTest, |
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::testing::Values(XdsTestType()), &XdsTestType::Name); |
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// Tests that we go into TRANSIENT_FAILURE if the Cluster is deleted. |
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TEST_P(CdsDeletionTest, ClusterDeleted) { |
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InitClient(); |
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CreateAndStartBackends(1); |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// We need to wait for all backends to come online. |
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WaitForAllBackends(DEBUG_LOCATION); |
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// Unset CDS resource. |
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balancer_->ads_service()->UnsetResource(kCdsTypeUrl, kDefaultClusterName); |
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// Wait for RPCs to start failing. |
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SendRpcsUntil(DEBUG_LOCATION, [](const RpcResult& result) { |
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if (result.status.ok()) return true; // Keep going. |
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EXPECT_EQ(StatusCode::UNAVAILABLE, result.status.error_code()); |
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EXPECT_EQ(absl::StrCat("CDS resource \"", kDefaultClusterName, |
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"\" does not exist"), |
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result.status.error_message()); |
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return false; |
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}); |
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// Make sure we ACK'ed the update. |
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auto response_state = balancer_->ads_service()->cds_response_state(); |
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ASSERT_TRUE(response_state.has_value()); |
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EXPECT_EQ(response_state->state, AdsServiceImpl::ResponseState::ACKED); |
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} |
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// Tests that we ignore Cluster deletions if configured to do so. |
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TEST_P(CdsDeletionTest, ClusterDeletionIgnored) { |
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InitClient(BootstrapBuilder().SetIgnoreResourceDeletion()); |
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CreateAndStartBackends(2); |
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// Bring up client pointing to backend 0 and wait for it to connect. |
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EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 1)}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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WaitForAllBackends(DEBUG_LOCATION, 0, 1); |
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// Make sure we ACKed the CDS update. |
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auto response_state = balancer_->ads_service()->cds_response_state(); |
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ASSERT_TRUE(response_state.has_value()); |
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EXPECT_EQ(response_state->state, AdsServiceImpl::ResponseState::ACKED); |
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// Unset CDS resource and wait for client to ACK the update. |
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balancer_->ads_service()->UnsetResource(kCdsTypeUrl, kDefaultClusterName); |
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const auto deadline = absl::Now() + absl::Seconds(30); |
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while (true) { |
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ASSERT_LT(absl::Now(), deadline) << "timed out waiting for CDS ACK"; |
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response_state = balancer_->ads_service()->cds_response_state(); |
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if (response_state.has_value()) break; |
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} |
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EXPECT_EQ(response_state->state, AdsServiceImpl::ResponseState::ACKED); |
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// Make sure we can still send RPCs. |
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CheckRpcSendOk(DEBUG_LOCATION); |
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// Now recreate the CDS resource pointing to a new EDS resource that |
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// specified backend 1, and make sure the client uses it. |
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const char* kNewEdsResourceName = "new_eds_resource_name"; |
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auto cluster = default_cluster_; |
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cluster.mutable_eds_cluster_config()->set_service_name(kNewEdsResourceName); |
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balancer_->ads_service()->SetCdsResource(cluster); |
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args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends(1, 2)}}); |
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balancer_->ads_service()->SetEdsResource( |
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BuildEdsResource(args, kNewEdsResourceName)); |
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// Wait for client to start using backend 1. |
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WaitForAllBackends(DEBUG_LOCATION, 1, 2); |
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} |
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// |
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// EDS tests |
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// |
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using EdsTest = XdsEnd2endTest; |
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INSTANTIATE_TEST_SUITE_P( |
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XdsTest, EdsTest, |
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::testing::Values(XdsTestType(), XdsTestType().set_enable_load_reporting()), |
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&XdsTestType::Name); |
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|
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// Tests that the balancer sends the correct response to the client, and the |
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// client sends RPCs to the backends using the default child policy. |
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TEST_P(EdsTest, Vanilla) { |
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CreateAndStartBackends(3); |
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const size_t kNumRpcsPerAddress = 100; |
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EdsResourceArgs args({ |
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{"locality0", CreateEndpointsForBackends()}, |
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}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Make sure that trying to connect works without a call. |
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channel_->GetState(true /* try_to_connect */); |
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// We need to wait for all backends to come online. |
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WaitForAllBackends(DEBUG_LOCATION); |
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// Send kNumRpcsPerAddress RPCs per server. |
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CheckRpcSendOk(DEBUG_LOCATION, kNumRpcsPerAddress * backends_.size()); |
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// Each backend should have gotten 100 requests. |
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for (size_t i = 0; i < backends_.size(); ++i) { |
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EXPECT_EQ(kNumRpcsPerAddress, |
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backends_[i]->backend_service()->request_count()); |
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} |
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// Check LB policy name for the channel. |
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EXPECT_EQ("xds_cluster_manager_experimental", |
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channel_->GetLoadBalancingPolicyName()); |
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} |
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TEST_P(EdsTest, IgnoresUnhealthyEndpoints) { |
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CreateAndStartBackends(2); |
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const size_t kNumRpcsPerAddress = 100; |
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auto endpoints = CreateEndpointsForBackends(); |
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endpoints.push_back(MakeNonExistantEndpoint()); |
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endpoints.back().health_status = HealthStatus::DRAINING; |
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EdsResourceArgs args({ |
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{"locality0", std::move(endpoints), kDefaultLocalityWeight, |
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kDefaultLocalityPriority}, |
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}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// Make sure that trying to connect works without a call. |
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channel_->GetState(true /* try_to_connect */); |
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// We need to wait for all backends to come online. |
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WaitForAllBackends(DEBUG_LOCATION); |
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// Send kNumRpcsPerAddress RPCs per server. |
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CheckRpcSendOk(DEBUG_LOCATION, kNumRpcsPerAddress * backends_.size()); |
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// Each backend should have gotten 100 requests. |
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for (size_t i = 0; i < backends_.size(); ++i) { |
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EXPECT_EQ(kNumRpcsPerAddress, |
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backends_[i]->backend_service()->request_count()); |
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} |
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} |
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TEST_P(EdsTest, OneLocalityWithNoEndpoints) { |
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CreateAndStartBackends(1); |
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// Initial EDS resource has one locality with no endpoints. |
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EdsResourceArgs::Locality empty_locality("locality0", {}); |
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EdsResourceArgs args({std::move(empty_locality)}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// RPCs should fail. |
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constexpr char kErrorMessage[] = |
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"no children in weighted_target policy: " |
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"EDS resource eds_service_name contains empty localities: " |
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"\\[\\{region=\"xds_default_locality_region\", " |
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"zone=\"xds_default_locality_zone\", sub_zone=\"locality0\"\\}\\]"; |
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CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, kErrorMessage); |
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// Send EDS resource that has an endpoint. |
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args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends()}}); |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// RPCs should eventually succeed. |
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WaitForAllBackends(DEBUG_LOCATION, 0, 1, [&](const RpcResult& result) { |
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if (!result.status.ok()) { |
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EXPECT_EQ(result.status.error_code(), StatusCode::UNAVAILABLE); |
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EXPECT_THAT(result.status.error_message(), |
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::testing::MatchesRegex(kErrorMessage)); |
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} |
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}); |
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} |
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|
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TEST_P(EdsTest, NoLocalities) { |
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CreateAndStartBackends(1); |
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// Initial EDS resource has no localities. |
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EdsResourceArgs args; |
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balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
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// RPCs should fail. |
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constexpr char kErrorMessage[] = |
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"no children in weighted_target policy: EDS resource eds_service_name " |
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"contains no localities"; |
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CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, kErrorMessage); |
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// Send EDS resource that has an endpoint. |
|
args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends()}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// RPCs should eventually succeed. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 1, [&](const RpcResult& result) { |
|
if (!result.status.ok()) { |
|
EXPECT_EQ(result.status.error_code(), StatusCode::UNAVAILABLE); |
|
EXPECT_THAT(result.status.error_message(), |
|
::testing::MatchesRegex(kErrorMessage)); |
|
} |
|
}); |
|
} |
|
|
|
// Tests that RPCs will fail with UNAVAILABLE instead of DEADLINE_EXCEEDED if |
|
// all the servers are unreachable. |
|
TEST_P(EdsTest, AllServersUnreachableFailFast) { |
|
// Set Rpc timeout to 5 seconds to ensure there is enough time |
|
// for communication with the xDS server to take place upon test start up. |
|
const uint32_t kRpcTimeoutMs = 5000; |
|
const size_t kNumUnreachableServers = 5; |
|
std::vector<EdsResourceArgs::Endpoint> endpoints; |
|
for (size_t i = 0; i < kNumUnreachableServers; ++i) { |
|
endpoints.emplace_back(MakeNonExistantEndpoint()); |
|
} |
|
EdsResourceArgs args({{"locality0", std::move(endpoints)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// The error shouldn't be DEADLINE_EXCEEDED because timeout is set to 5 |
|
// seconds, and we should disocver in that time that the target backend is |
|
// down. |
|
CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)", |
|
RpcOptions().set_timeout_ms(kRpcTimeoutMs)); |
|
} |
|
|
|
// Tests that RPCs fail when the backends are down, and will succeed again |
|
// after the backends are restarted. |
|
TEST_P(EdsTest, BackendsRestart) { |
|
CreateAndStartBackends(3); |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForAllBackends(DEBUG_LOCATION); |
|
// Stop backends. RPCs should fail. |
|
ShutdownAllBackends(); |
|
// Wait for channel to transition out of READY, so that we know it has |
|
// noticed that all of the subchannels have failed. Note that it may |
|
// be reporting either CONNECTING or TRANSIENT_FAILURE at this point. |
|
EXPECT_TRUE(channel_->WaitForStateChange( |
|
GRPC_CHANNEL_READY, grpc_timeout_seconds_to_deadline(5))); |
|
EXPECT_THAT(channel_->GetState(false), |
|
::testing::AnyOf(::testing::Eq(GRPC_CHANNEL_TRANSIENT_FAILURE), |
|
::testing::Eq(GRPC_CHANNEL_CONNECTING))); |
|
// RPCs should fail. |
|
CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"); |
|
// Restart all backends. RPCs should start succeeding again. |
|
StartAllBackends(); |
|
CheckRpcSendOk(DEBUG_LOCATION, 1, |
|
RpcOptions().set_timeout_ms(2000).set_wait_for_ready(true)); |
|
} |
|
|
|
TEST_P(EdsTest, IgnoresDuplicateUpdates) { |
|
CreateAndStartBackends(1); |
|
const size_t kNumRpcsPerAddress = 100; |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends()}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for all backends to come online. |
|
WaitForAllBackends(DEBUG_LOCATION); |
|
// Send kNumRpcsPerAddress RPCs per server, but send an EDS update in |
|
// between. If the update is not ignored, this will cause the |
|
// round_robin policy to see an update, which will randomly reset its |
|
// position in the address list. |
|
for (size_t i = 0; i < kNumRpcsPerAddress; ++i) { |
|
CheckRpcSendOk(DEBUG_LOCATION, 2); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
CheckRpcSendOk(DEBUG_LOCATION, 2); |
|
} |
|
// Each backend should have gotten the right number of requests. |
|
for (size_t i = 1; i < backends_.size(); ++i) { |
|
EXPECT_EQ(kNumRpcsPerAddress, |
|
backends_[i]->backend_service()->request_count()); |
|
} |
|
} |
|
|
|
// Testing just one example of an invalid resource here. |
|
// Unit tests for XdsEndpointResourceType have exhaustive tests for all |
|
// of the invalid cases. |
|
TEST_P(EdsTest, NacksInvalidResource) { |
|
EdsResourceArgs args({ |
|
{"locality0", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
const auto response_state = WaitForEdsNack(DEBUG_LOCATION); |
|
ASSERT_TRUE(response_state.has_value()) << "timed out waiting for NACK"; |
|
EXPECT_EQ(response_state->error_message, |
|
"xDS response validation errors: [" |
|
"resource index 0: eds_service_name: " |
|
"INVALID_ARGUMENT: errors parsing EDS resource: [" |
|
"field:endpoints error:priority 0 empty]]"); |
|
} |
|
|
|
// 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(EdsTest, KeepUsingLastDataIfBalancerGoesDown) { |
|
CreateAndStartBackends(2); |
|
// Set up EDS resource pointing to backend 0. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 1)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Start the client and make sure it sees the backend. |
|
WaitForBackend(DEBUG_LOCATION, 0); |
|
// Stop the balancer, and verify that RPCs continue to flow to backend 0. |
|
balancer_->Shutdown(); |
|
auto deadline = grpc_timeout_seconds_to_deadline(5); |
|
do { |
|
CheckRpcSendOk(DEBUG_LOCATION); |
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_MONOTONIC), deadline) < 0); |
|
// Check the EDS resource to point to backend 1 and bring the balancer |
|
// back up. |
|
args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends(1, 2)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
balancer_->Start(); |
|
// Wait for client to see backend 1. |
|
WaitForBackend(DEBUG_LOCATION, 1); |
|
} |
|
|
|
// Tests that the localities in a locality map are picked according to their |
|
// weights. |
|
TEST_P(EdsTest, WeightedRoundRobin) { |
|
CreateAndStartBackends(2); |
|
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; |
|
const double kErrorTolerance = 0.05; |
|
const size_t kNumRpcs = |
|
ComputeIdealNumRpcs(kLocalityWeightRate0, kErrorTolerance); |
|
// ADS response contains 2 localities, each of which contains 1 backend. |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kLocalityWeight0}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kLocalityWeight1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for both backends to be ready. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
|
// Send kNumRpcs RPCs. |
|
CheckRpcSendOk(DEBUG_LOCATION, 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; |
|
EXPECT_THAT(locality_picked_rate_0, |
|
::testing::DoubleNear(kLocalityWeightRate0, kErrorTolerance)); |
|
EXPECT_THAT(locality_picked_rate_1, |
|
::testing::DoubleNear(kLocalityWeightRate1, kErrorTolerance)); |
|
} |
|
|
|
// Tests that we don't suffer from integer overflow in locality weights. |
|
TEST_P(EdsTest, NoIntegerOverflowInLocalityWeights) { |
|
CreateAndStartBackends(2); |
|
const uint32_t kLocalityWeight1 = std::numeric_limits<uint32_t>::max() / 3; |
|
const uint32_t kLocalityWeight0 = |
|
std::numeric_limits<uint32_t>::max() - kLocalityWeight1; |
|
const uint64_t kTotalLocalityWeight = |
|
static_cast<uint64_t>(kLocalityWeight0) + |
|
static_cast<uint64_t>(kLocalityWeight1); |
|
const double kLocalityWeightRate0 = |
|
static_cast<double>(kLocalityWeight0) / kTotalLocalityWeight; |
|
const double kLocalityWeightRate1 = |
|
static_cast<double>(kLocalityWeight1) / kTotalLocalityWeight; |
|
const double kErrorTolerance = 0.05; |
|
const size_t kNumRpcs = |
|
ComputeIdealNumRpcs(kLocalityWeightRate0, kErrorTolerance); |
|
// ADS response contains 2 localities, each of which contains 1 backend. |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kLocalityWeight0}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kLocalityWeight1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for both backends to be ready. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
|
// Send kNumRpcs RPCs. |
|
CheckRpcSendOk(DEBUG_LOCATION, 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; |
|
EXPECT_THAT(locality_picked_rate_0, |
|
::testing::DoubleNear(kLocalityWeightRate0, kErrorTolerance)); |
|
EXPECT_THAT(locality_picked_rate_1, |
|
::testing::DoubleNear(kLocalityWeightRate1, kErrorTolerance)); |
|
} |
|
|
|
// Tests that we correctly handle a locality containing no endpoints. |
|
TEST_P(EdsTest, LocalityContainingNoEndpoints) { |
|
CreateAndStartBackends(2); |
|
const size_t kNumRpcs = 5000; |
|
// EDS response contains 2 localities, one with no endpoints. |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends()}, |
|
{"locality1", {}}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for both backends to be ready. |
|
WaitForAllBackends(DEBUG_LOCATION); |
|
// Send kNumRpcs RPCs. |
|
CheckRpcSendOk(DEBUG_LOCATION, 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()); |
|
} |
|
|
|
// Tests that the locality map can work properly even when it contains a large |
|
// number of localities. |
|
TEST_P(EdsTest, ManyLocalitiesStressTest) { |
|
const size_t kNumLocalities = 50; |
|
CreateAndStartBackends(kNumLocalities + 1); |
|
const uint32_t kRpcTimeoutMs = 5000; |
|
// The first ADS response contains kNumLocalities localities, each of which |
|
// contains its own backend. |
|
EdsResourceArgs args; |
|
for (size_t i = 0; i < kNumLocalities; ++i) { |
|
std::string name = absl::StrCat("locality", i); |
|
EdsResourceArgs::Locality locality(name, |
|
CreateEndpointsForBackends(i, i + 1)); |
|
args.locality_list.emplace_back(std::move(locality)); |
|
} |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until all backends are ready. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, kNumLocalities, |
|
/*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false), |
|
RpcOptions().set_timeout_ms(kRpcTimeoutMs)); |
|
// The second ADS response contains 1 locality, which contains backend 50. |
|
args = |
|
EdsResourceArgs({{"locality0", CreateEndpointsForBackends( |
|
kNumLocalities, kNumLocalities + 1)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until backend 50 is ready. |
|
WaitForBackend(DEBUG_LOCATION, kNumLocalities); |
|
} |
|
|
|
// Tests that the localities in a locality map are picked correctly after |
|
// update (addition, modification, deletion). |
|
TEST_P(EdsTest, LocalityMapUpdateChurn) { |
|
CreateAndStartBackends(4); |
|
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; |
|
locality_weight_rate_0.reserve(kLocalityWeights0.size()); |
|
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); |
|
} |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), 2}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), 3}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), 4}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for the first 3 backends to be ready. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 3); |
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
|
// Send kNumRpcs RPCs. |
|
CheckRpcSendOk(DEBUG_LOCATION, 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 = EdsResourceArgs({ |
|
{"locality1", CreateEndpointsForBackends(1, 2), 3}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), 2}, |
|
{"locality3", CreateEndpointsForBackends(3, 4), 6}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// 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(DEBUG_LOCATION, 3, 4); |
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH =========="); |
|
// Send kNumRpcs RPCs. |
|
CheckRpcSendOk(DEBUG_LOCATION, 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(EdsTest, ReplaceAllLocalitiesInPriority) { |
|
CreateAndStartBackends(2); |
|
// Initial EDS update has backend 0. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 1)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for the first backend to be ready. |
|
WaitForBackend(DEBUG_LOCATION, 0); |
|
// Send EDS update that replaces the locality and switches to backend 1. |
|
args = EdsResourceArgs({{"locality1", CreateEndpointsForBackends(1, 2)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// When the client sees the update, RPCs should start going to backend 1. |
|
// No RPCs should fail during this change. |
|
WaitForBackend(DEBUG_LOCATION, 1); |
|
} |
|
|
|
TEST_P(EdsTest, ConsistentWeightedTargetUpdates) { |
|
CreateAndStartBackends(4); |
|
// Initial update has two localities. |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(1, 2)}, |
|
{"locality1", CreateEndpointsForBackends(2, 3)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForAllBackends(DEBUG_LOCATION, 1, 3); |
|
// Next update removes locality1. |
|
// Also add backend 0 to locality0, so that we can tell when the |
|
// update has been seen. |
|
args = EdsResourceArgs({ |
|
{"locality0", CreateEndpointsForBackends(0, 2)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 0); |
|
// Next update re-adds locality1. |
|
// Also add backend 3 to locality1, so that we can tell when the |
|
// update has been seen. |
|
args = EdsResourceArgs({ |
|
{"locality0", CreateEndpointsForBackends(0, 2)}, |
|
{"locality1", CreateEndpointsForBackends(2, 4)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 3); |
|
} |
|
|
|
// Tests that RPCs are dropped according to the drop config. |
|
TEST_P(EdsTest, Drops) { |
|
CreateAndStartBackends(1); |
|
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; |
|
const double kErrorTolerance = 0.05; |
|
const size_t kNumRpcs = |
|
ComputeIdealNumRpcs(kDropRateForLbAndThrottle, kErrorTolerance); |
|
// The ADS response contains two drop categories. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}, |
|
{kThrottleDropType, kDropPerMillionForThrottle}}; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcs RPCs and count the drops. |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcs, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
// The drop rate should be roughly equal to the expectation. |
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs; |
|
EXPECT_THAT(seen_drop_rate, ::testing::DoubleNear(kDropRateForLbAndThrottle, |
|
kErrorTolerance)); |
|
} |
|
|
|
// Tests that drop config is converted correctly from per hundred. |
|
TEST_P(EdsTest, DropPerHundred) { |
|
CreateAndStartBackends(1); |
|
const uint32_t kDropPerHundredForLb = 10; |
|
const double kDropRateForLb = kDropPerHundredForLb / 100.0; |
|
const double kErrorTolerance = 0.05; |
|
const size_t kNumRpcs = ComputeIdealNumRpcs(kDropRateForLb, kErrorTolerance); |
|
// The ADS response contains one drop category. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
args.drop_categories = {{kLbDropType, kDropPerHundredForLb}}; |
|
args.drop_denominator = FractionalPercent::HUNDRED; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcs RPCs and count the drops. |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcs, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
// The drop rate should be roughly equal to the expectation. |
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs; |
|
EXPECT_THAT(seen_drop_rate, |
|
::testing::DoubleNear(kDropRateForLb, kErrorTolerance)); |
|
} |
|
|
|
// Tests that drop config is converted correctly from per ten thousand. |
|
TEST_P(EdsTest, DropPerTenThousand) { |
|
CreateAndStartBackends(1); |
|
const uint32_t kDropPerTenThousandForLb = 1000; |
|
const double kDropRateForLb = kDropPerTenThousandForLb / 10000.0; |
|
const double kErrorTolerance = 0.05; |
|
const size_t kNumRpcs = ComputeIdealNumRpcs(kDropRateForLb, kErrorTolerance); |
|
// The ADS response contains one drop category. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
args.drop_categories = {{kLbDropType, kDropPerTenThousandForLb}}; |
|
args.drop_denominator = FractionalPercent::TEN_THOUSAND; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcs RPCs and count the drops. |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcs, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
// The drop rate should be roughly equal to the expectation. |
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs; |
|
EXPECT_THAT(seen_drop_rate, |
|
::testing::DoubleNear(kDropRateForLb, kErrorTolerance)); |
|
} |
|
|
|
// Tests that drop is working correctly after update. |
|
TEST_P(EdsTest, DropConfigUpdate) { |
|
CreateAndStartBackends(1); |
|
const uint32_t kDropPerMillionForLb = 100000; |
|
const uint32_t kDropPerMillionForThrottle = 200000; |
|
const double kErrorTolerance = 0.05; |
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0; |
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0; |
|
const double kDropRateForLbAndThrottle = |
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle; |
|
const size_t kNumRpcsLbOnly = |
|
ComputeIdealNumRpcs(kDropRateForLb, kErrorTolerance); |
|
const size_t kNumRpcsBoth = |
|
ComputeIdealNumRpcs(kDropRateForLbAndThrottle, kErrorTolerance); |
|
// The first ADS response contains one drop category. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}}; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcsLbOnly RPCs and count the drops. |
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH =========="); |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcsLbOnly, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
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) / kNumRpcsLbOnly; |
|
gpr_log(GPR_INFO, "First batch drop rate %f", seen_drop_rate); |
|
EXPECT_THAT(seen_drop_rate, |
|
::testing::DoubleNear(kDropRateForLb, kErrorTolerance)); |
|
// The second ADS response contains two drop categories, send an update EDS |
|
// response. |
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}, |
|
{kThrottleDropType, kDropPerMillionForThrottle}}; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// 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 = kNumRpcsBoth; |
|
SendRpcsUntil( |
|
DEBUG_LOCATION, |
|
[&](const RpcResult& result) { |
|
++num_rpcs; |
|
if (result.status.ok()) { |
|
EXPECT_EQ(result.response.message(), kRequestMessage); |
|
} else { |
|
EXPECT_EQ(result.status.error_code(), StatusCode::UNAVAILABLE); |
|
EXPECT_THAT(result.status.error_message(), |
|
::testing::StartsWith(kStatusMessageDropPrefix)); |
|
++num_drops; |
|
} |
|
seen_drop_rate = static_cast<double>(num_drops) / num_rpcs; |
|
return seen_drop_rate < kDropRateThreshold; |
|
}, |
|
/*timeout_ms=*/40000); |
|
// Send kNumRpcsBoth RPCs and count the drops. |
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH =========="); |
|
num_drops = SendRpcsAndCountFailuresWithMessage(DEBUG_LOCATION, kNumRpcsBoth, |
|
StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
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) / kNumRpcsBoth; |
|
gpr_log(GPR_INFO, "Second batch drop rate %f", seen_drop_rate); |
|
EXPECT_THAT(seen_drop_rate, ::testing::DoubleNear(kDropRateForLbAndThrottle, |
|
kErrorTolerance)); |
|
} |
|
|
|
// Tests that all the RPCs are dropped if any drop category drops 100%. |
|
TEST_P(EdsTest, DropAll) { |
|
const size_t kNumRpcs = 1000; |
|
const uint32_t kDropPerMillionForLb = 100000; |
|
const uint32_t kDropPerMillionForThrottle = 1000000; |
|
// The ADS response contains two drop categories. |
|
EdsResourceArgs args; |
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}, |
|
{kThrottleDropType, kDropPerMillionForThrottle}}; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcs RPCs and all of them are dropped. |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcs, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
EXPECT_EQ(num_drops, kNumRpcs); |
|
} |
|
|
|
// |
|
// EDS failover tests |
|
// |
|
|
|
class FailoverTest : public XdsEnd2endTest { |
|
public: |
|
void SetUp() override { |
|
XdsEnd2endTest::SetUp(); |
|
ResetStub(/*failover_timeout_ms=*/500); |
|
} |
|
}; |
|
|
|
INSTANTIATE_TEST_SUITE_P( |
|
XdsTest, FailoverTest, |
|
::testing::Values(XdsTestType(), XdsTestType().set_enable_load_reporting()), |
|
&XdsTestType::Name); |
|
|
|
// Localities with the highest priority are used when multiple priority exist. |
|
TEST_P(FailoverTest, ChooseHighestPriority) { |
|
CreateAndStartBackends(4); |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
1}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
2}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
3}, |
|
{"locality3", CreateEndpointsForBackends(3, 4), kDefaultLocalityWeight, |
|
0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 3, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(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) { |
|
CreateAndStartBackends(3); |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
1}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
2}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
3}, |
|
{"locality3", {}, kDefaultLocalityWeight, 0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 0, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(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) { |
|
CreateAndStartBackends(1); |
|
EdsResourceArgs args({ |
|
{"locality0", {}, kDefaultLocalityWeight, 0}, |
|
{"locality1", CreateEndpointsForBackends(), kDefaultLocalityWeight, 0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for all backends to be used. |
|
WaitForAllBackends(DEBUG_LOCATION); |
|
} |
|
|
|
// If the higher priority localities are not reachable, failover to the |
|
// highest priority among the rest. |
|
TEST_P(FailoverTest, Failover) { |
|
CreateAndStartBackends(2); |
|
EdsResourceArgs args({ |
|
{"locality0", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 1}, |
|
{"locality1", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
2}, |
|
{"locality2", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
3}, |
|
{"locality3", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 0, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false)); |
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count()); |
|
} |
|
|
|
// Reports CONNECTING when failing over to a lower priority. |
|
TEST_P(FailoverTest, ReportsConnectingDuringFailover) { |
|
CreateAndStartBackends(1); |
|
// Priority 0 will be unreachable, so we'll use priority 1. |
|
EdsResourceArgs args({ |
|
{"locality0", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 0}, |
|
{"locality1", CreateEndpointsForBackends(), kDefaultLocalityWeight, 1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
ConnectionAttemptInjector injector; |
|
auto hold = injector.AddHold(backends_[0]->port()); |
|
// Start an RPC in the background, which should cause the channel to |
|
// try to connect. |
|
LongRunningRpc rpc; |
|
rpc.StartRpc(stub_.get(), RpcOptions()); |
|
// Wait for connection attempt to start to the backend. |
|
hold->Wait(); |
|
// Channel state should be CONNECTING here, and any RPC should be |
|
// queued. |
|
EXPECT_EQ(channel_->GetState(false), GRPC_CHANNEL_CONNECTING); |
|
// Allow the connection attempt to complete. |
|
hold->Resume(); |
|
// Now the RPC should complete successfully. |
|
gpr_log(GPR_INFO, "=== WAITING FOR RPC TO FINISH ==="); |
|
Status status = rpc.GetStatus(); |
|
gpr_log(GPR_INFO, "=== RPC FINISHED ==="); |
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code() |
|
<< " message=" << status.error_message(); |
|
} |
|
|
|
// If a locality with higher priority than the current one becomes ready, |
|
// switch to it. |
|
TEST_P(FailoverTest, SwitchBackToHigherPriority) { |
|
CreateAndStartBackends(4); |
|
const size_t kNumRpcs = 100; |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
1}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
2}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
3}, |
|
{"locality3", CreateEndpointsForBackends(3, 4), kDefaultLocalityWeight, |
|
0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 3); |
|
backends_[3]->StopListeningAndSendGoaways(); |
|
backends_[0]->StopListeningAndSendGoaways(); |
|
WaitForBackend(DEBUG_LOCATION, 1); |
|
ShutdownBackend(0); |
|
StartBackend(0); |
|
WaitForBackend(DEBUG_LOCATION, 0); |
|
CheckRpcSendOk(DEBUG_LOCATION, 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) { |
|
CreateAndStartBackends(2); |
|
EdsResourceArgs args({ |
|
{"locality0", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 0}, |
|
{"locality1", {MakeNonExistantEndpoint()}, kDefaultLocalityWeight, 1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
constexpr char kErrorMessageRegex[] = |
|
"connections to all backends failing; last error: " |
|
"(UNKNOWN: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: Connection refused|" |
|
"UNAVAILABLE: (ipv6:%5B::1%5D|ipv4:127.0.0.1):[0-9]+: " |
|
"Failed to connect to remote host: FD shutdown)"; |
|
CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::UNAVAILABLE, |
|
kErrorMessageRegex); |
|
args = EdsResourceArgs({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
0}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 0, [&](const RpcResult& result) { |
|
if (!result.status.ok()) { |
|
EXPECT_EQ(result.status.error_code(), StatusCode::UNAVAILABLE); |
|
EXPECT_THAT(result.status.error_message(), |
|
::testing::MatchesRegex(kErrorMessageRegex)); |
|
} |
|
}); |
|
} |
|
|
|
// Tests that after the localities' priorities are updated, we still choose |
|
// the highest READY priority with the updated localities. |
|
TEST_P(FailoverTest, UpdatePriority) { |
|
CreateAndStartBackends(4); |
|
const size_t kNumRpcs = 100; |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
1}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
2}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
3}, |
|
{"locality3", CreateEndpointsForBackends(3, 4), kDefaultLocalityWeight, |
|
0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 3, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false)); |
|
EXPECT_EQ(0U, backends_[0]->backend_service()->request_count()); |
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count()); |
|
EXPECT_EQ(0U, backends_[2]->backend_service()->request_count()); |
|
args = EdsResourceArgs({ |
|
{"locality0", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
2}, |
|
{"locality1", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
0}, |
|
{"locality2", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
1}, |
|
{"locality3", CreateEndpointsForBackends(3, 4), kDefaultLocalityWeight, |
|
3}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 1); |
|
CheckRpcSendOk(DEBUG_LOCATION, kNumRpcs); |
|
EXPECT_EQ(kNumRpcs, backends_[1]->backend_service()->request_count()); |
|
} |
|
|
|
// Moves all localities in the current priority to a higher priority. |
|
TEST_P(FailoverTest, MoveAllLocalitiesInCurrentPriorityToHigherPriority) { |
|
CreateAndStartBackends(3); |
|
auto non_existant_endpoint = MakeNonExistantEndpoint(); |
|
// First update: |
|
// - Priority 0 is locality 0, containing an unreachable backend. |
|
// - Priority 1 is locality 1, containing backends 0 and 1. |
|
EdsResourceArgs args({ |
|
{"locality0", {non_existant_endpoint}, kDefaultLocalityWeight, 0}, |
|
{"locality1", CreateEndpointsForBackends(0, 2), kDefaultLocalityWeight, |
|
1}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// When we get the first update, all backends in priority 0 are down, |
|
// so we will create priority 1. Backends 0 and 1 should have traffic, |
|
// but backend 2 should not. |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 2, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false)); |
|
EXPECT_EQ(0UL, backends_[2]->backend_service()->request_count()); |
|
// Second update: |
|
// - Priority 0 contains both localities 0 and 1. |
|
// - Priority 1 is not present. |
|
// - We add backend 2 to locality 1, just so we have a way to know |
|
// when the update has been seen by the client. |
|
args = EdsResourceArgs({ |
|
{"locality0", {non_existant_endpoint}, kDefaultLocalityWeight, 0}, |
|
{"locality1", CreateEndpointsForBackends(0, 3), kDefaultLocalityWeight, |
|
0}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// When backend 2 gets traffic, we know the second update has been seen. |
|
WaitForBackend(DEBUG_LOCATION, 2); |
|
// The xDS server got at least 1 response. |
|
EXPECT_TRUE(balancer_->ads_service()->eds_response_state().has_value()); |
|
} |
|
|
|
// This tests a bug triggered by the xds_cluster_resolver policy reusing |
|
// a child name for the priority policy when that child name was still |
|
// present but deactivated. |
|
TEST_P(FailoverTest, PriorityChildNameChurn) { |
|
CreateAndStartBackends(4); |
|
auto non_existant_endpoint = MakeNonExistantEndpoint(); |
|
// Initial update: |
|
// - P0:locality0, child number 0 (unreachable) |
|
// - P1:locality1, child number 1 |
|
// - P2:locality2, child number 2 |
|
EdsResourceArgs args({ |
|
{"locality0", {non_existant_endpoint}, kDefaultLocalityWeight, 0}, |
|
{"locality1", CreateEndpointsForBackends(0, 1), kDefaultLocalityWeight, |
|
1}, |
|
{"locality2", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
2}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 0); |
|
// Next update: |
|
// - P0:locality0, child number 0 (still unreachable) |
|
// - P1:locality2, child number 2 (moved from P2 to P1) |
|
// - P2:locality3, child number 3 (new child) |
|
// Child number 1 will be deactivated. |
|
args = EdsResourceArgs({ |
|
{"locality0", {non_existant_endpoint}, kDefaultLocalityWeight, 0}, |
|
{"locality2", CreateEndpointsForBackends(1, 2), kDefaultLocalityWeight, |
|
1}, |
|
{"locality3", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
2}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 1); |
|
// Next update: |
|
// - P0:locality0, child number 0 (still unreachable) |
|
// - P1:locality4, child number 4 (new child number -- should not reuse #1) |
|
// - P2:locality3, child number 3 |
|
// Child number 1 will be deactivated. |
|
args = EdsResourceArgs({ |
|
{"locality0", {non_existant_endpoint}, kDefaultLocalityWeight, 0}, |
|
{"locality4", CreateEndpointsForBackends(3, 4), kDefaultLocalityWeight, |
|
1}, |
|
{"locality3", CreateEndpointsForBackends(2, 3), kDefaultLocalityWeight, |
|
2}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
WaitForBackend(DEBUG_LOCATION, 3, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false)); |
|
// P2 should not have gotten any traffic in this change. |
|
EXPECT_EQ(0UL, backends_[2]->backend_service()->request_count()); |
|
} |
|
|
|
// |
|
// EDS client load reporting tests |
|
// |
|
|
|
using ClientLoadReportingTest = XdsEnd2endTest; |
|
|
|
INSTANTIATE_TEST_SUITE_P( |
|
XdsTest, ClientLoadReportingTest, |
|
::testing::Values(XdsTestType().set_enable_load_reporting()), |
|
&XdsTestType::Name); |
|
|
|
// Tests that the load report received at the balancer is correct. |
|
TEST_P(ClientLoadReportingTest, Vanilla) { |
|
CreateAndStartBackends(4); |
|
const size_t kNumRpcsPerAddress = 10; |
|
const size_t kNumFailuresPerAddress = 3; |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 2)}, |
|
{"locality1", CreateEndpointsForBackends(2, 4)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until all backends are ready. |
|
size_t num_warmup_rpcs = |
|
WaitForAllBackends(DEBUG_LOCATION, 0, 4, /*check_status=*/nullptr, |
|
WaitForBackendOptions().set_reset_counters(false)); |
|
// Send kNumRpcsPerAddress RPCs per server. |
|
CheckRpcSendOk(DEBUG_LOCATION, kNumRpcsPerAddress * backends_.size()); |
|
for (size_t i = 0; i < kNumFailuresPerAddress * backends_.size(); ++i) { |
|
CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::FAILED_PRECONDITION, "", |
|
RpcOptions().set_server_fail(true)); |
|
} |
|
const size_t total_successful_rpcs_sent = |
|
(kNumRpcsPerAddress * backends_.size()) + num_warmup_rpcs; |
|
const size_t total_failed_rpcs_sent = |
|
kNumFailuresPerAddress * backends_.size(); |
|
// Check that the backends got the right number of requests. |
|
size_t total_rpcs_sent = 0; |
|
for (const auto& backend : backends_) { |
|
total_rpcs_sent += backend->backend_service()->request_count(); |
|
} |
|
EXPECT_EQ(total_rpcs_sent, |
|
total_successful_rpcs_sent + total_failed_rpcs_sent); |
|
// The load report received at the balancer should be correct. |
|
std::vector<ClientStats> load_report = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
ASSERT_EQ(load_report.size(), 1UL); |
|
ClientStats& client_stats = load_report.front(); |
|
EXPECT_EQ(client_stats.cluster_name(), kDefaultClusterName); |
|
EXPECT_EQ(client_stats.eds_service_name(), kDefaultEdsServiceName); |
|
EXPECT_EQ(total_successful_rpcs_sent, |
|
client_stats.total_successful_requests()); |
|
EXPECT_EQ(0U, client_stats.total_requests_in_progress()); |
|
EXPECT_EQ(total_rpcs_sent, client_stats.total_issued_requests()); |
|
EXPECT_EQ(total_failed_rpcs_sent, client_stats.total_error_requests()); |
|
EXPECT_EQ(0U, client_stats.total_dropped_requests()); |
|
ASSERT_THAT( |
|
client_stats.locality_stats(), |
|
::testing::ElementsAre(::testing::Pair("locality0", ::testing::_), |
|
::testing::Pair("locality1", ::testing::_))); |
|
size_t num_successful_rpcs = 0; |
|
size_t num_failed_rpcs = 0; |
|
for (const auto& p : client_stats.locality_stats()) { |
|
EXPECT_EQ(p.second.total_requests_in_progress, 0U); |
|
EXPECT_EQ( |
|
p.second.total_issued_requests, |
|
p.second.total_successful_requests + p.second.total_error_requests); |
|
num_successful_rpcs += p.second.total_successful_requests; |
|
num_failed_rpcs += p.second.total_error_requests; |
|
} |
|
EXPECT_EQ(num_successful_rpcs, total_successful_rpcs_sent); |
|
EXPECT_EQ(num_failed_rpcs, total_failed_rpcs_sent); |
|
EXPECT_EQ(num_successful_rpcs + num_failed_rpcs, total_rpcs_sent); |
|
// The LRS service got a single request, and sent a single response. |
|
EXPECT_EQ(1U, balancer_->lrs_service()->request_count()); |
|
EXPECT_EQ(1U, balancer_->lrs_service()->response_count()); |
|
} |
|
|
|
// Tests send_all_clusters. |
|
TEST_P(ClientLoadReportingTest, SendAllClusters) { |
|
CreateAndStartBackends(2); |
|
balancer_->lrs_service()->set_send_all_clusters(true); |
|
const size_t kNumRpcsPerAddress = 10; |
|
const size_t kNumFailuresPerAddress = 3; |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until all backends are ready. |
|
size_t num_warmup_rpcs = WaitForAllBackends(DEBUG_LOCATION); |
|
// Send kNumRpcsPerAddress RPCs per server. |
|
CheckRpcSendOk(DEBUG_LOCATION, kNumRpcsPerAddress * backends_.size()); |
|
for (size_t i = 0; i < kNumFailuresPerAddress * backends_.size(); ++i) { |
|
CheckRpcSendFailure(DEBUG_LOCATION, StatusCode::FAILED_PRECONDITION, "", |
|
RpcOptions().set_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 = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
ASSERT_EQ(load_report.size(), 1UL); |
|
ClientStats& client_stats = load_report.front(); |
|
EXPECT_EQ(kNumRpcsPerAddress * backends_.size() + num_warmup_rpcs, |
|
client_stats.total_successful_requests()); |
|
EXPECT_EQ(0U, client_stats.total_requests_in_progress()); |
|
EXPECT_EQ((kNumRpcsPerAddress + kNumFailuresPerAddress) * backends_.size() + |
|
num_warmup_rpcs, |
|
client_stats.total_issued_requests()); |
|
EXPECT_EQ(kNumFailuresPerAddress * backends_.size(), |
|
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, balancer_->lrs_service()->request_count()); |
|
EXPECT_EQ(1U, balancer_->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) { |
|
CreateAndStartBackends(1); |
|
balancer_->lrs_service()->set_cluster_names({"bogus"}); |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until all backends are ready. |
|
WaitForAllBackends(DEBUG_LOCATION); |
|
// The load report received at the balancer should be correct. |
|
std::vector<ClientStats> load_report = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
ASSERT_EQ(load_report.size(), 0UL); |
|
// The LRS service got a single request, and sent a single response. |
|
EXPECT_EQ(1U, balancer_->lrs_service()->request_count()); |
|
EXPECT_EQ(1U, balancer_->lrs_service()->response_count()); |
|
} |
|
|
|
// Tests that if the balancer restarts, the client load report contains the |
|
// stats before and after the restart correctly. |
|
TEST_P(ClientLoadReportingTest, BalancerRestart) { |
|
CreateAndStartBackends(4); |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends(0, 2)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait until all backends returned by the balancer are ready. |
|
size_t num_rpcs = WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
|
std::vector<ClientStats> load_report = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
ASSERT_EQ(load_report.size(), 1UL); |
|
ClientStats client_stats = std::move(load_report.front()); |
|
EXPECT_EQ(num_rpcs, 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. |
|
balancer_->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 |
|
// ListenerWatcher, 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(); |
|
num_rpcs = WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
|
// Now restart the balancer, this time pointing to the new backends. |
|
balancer_->Start(); |
|
args = EdsResourceArgs({{"locality0", CreateEndpointsForBackends(2, 4)}}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Wait for queries to start going to one of the new backends. |
|
// This tells us that we're now using the new serverlist. |
|
num_rpcs += WaitForAllBackends(DEBUG_LOCATION, 2, 4); |
|
// Send one RPC per backend. |
|
CheckRpcSendOk(DEBUG_LOCATION, 2); |
|
num_rpcs += 2; |
|
// Check client stats. |
|
load_report = balancer_->lrs_service()->WaitForLoadReport(); |
|
ASSERT_EQ(load_report.size(), 1UL); |
|
client_stats = std::move(load_report.front()); |
|
EXPECT_EQ(num_rpcs, 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()); |
|
} |
|
|
|
// Tests load reporting when switching over from one cluster to another. |
|
TEST_P(ClientLoadReportingTest, ChangeClusters) { |
|
CreateAndStartBackends(4); |
|
const char* kNewClusterName = "new_cluster_name"; |
|
const char* kNewEdsServiceName = "new_eds_service_name"; |
|
balancer_->lrs_service()->set_cluster_names( |
|
{kDefaultClusterName, kNewClusterName}); |
|
// cluster kDefaultClusterName -> locality0 -> backends 0 and 1 |
|
EdsResourceArgs args({ |
|
{"locality0", CreateEndpointsForBackends(0, 2)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// cluster kNewClusterName -> locality1 -> backends 2 and 3 |
|
EdsResourceArgs args2({ |
|
{"locality1", CreateEndpointsForBackends(2, 4)}, |
|
}); |
|
balancer_->ads_service()->SetEdsResource( |
|
BuildEdsResource(args2, kNewEdsServiceName)); |
|
// CDS resource for kNewClusterName. |
|
Cluster new_cluster = default_cluster_; |
|
new_cluster.set_name(kNewClusterName); |
|
new_cluster.mutable_eds_cluster_config()->set_service_name( |
|
kNewEdsServiceName); |
|
balancer_->ads_service()->SetCdsResource(new_cluster); |
|
// Wait for all backends to come online. |
|
size_t num_rpcs = WaitForAllBackends(DEBUG_LOCATION, 0, 2); |
|
// The load report received at the balancer should be correct. |
|
std::vector<ClientStats> load_report = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
EXPECT_THAT( |
|
load_report, |
|
::testing::ElementsAre(::testing::AllOf( |
|
::testing::Property(&ClientStats::cluster_name, kDefaultClusterName), |
|
::testing::Property(&ClientStats::eds_service_name, |
|
kDefaultEdsServiceName), |
|
::testing::Property( |
|
&ClientStats::locality_stats, |
|
::testing::ElementsAre(::testing::Pair( |
|
"locality0", |
|
::testing::AllOf( |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_successful_requests, |
|
num_rpcs), |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_requests_in_progress, |
|
0UL), |
|
::testing::Field( |
|
&ClientStats::LocalityStats::total_error_requests, |
|
0UL), |
|
::testing::Field( |
|
&ClientStats::LocalityStats::total_issued_requests, |
|
num_rpcs))))), |
|
::testing::Property(&ClientStats::total_dropped_requests, 0UL)))); |
|
// Change RDS resource to point to new cluster. |
|
RouteConfiguration new_route_config = default_route_config_; |
|
new_route_config.mutable_virtual_hosts(0) |
|
->mutable_routes(0) |
|
->mutable_route() |
|
->set_cluster(kNewClusterName); |
|
SetListenerAndRouteConfiguration(balancer_.get(), default_listener_, |
|
new_route_config); |
|
// Wait for all new backends to be used. |
|
num_rpcs = WaitForAllBackends(DEBUG_LOCATION, 2, 4); |
|
// The load report received at the balancer should be correct. |
|
load_report = balancer_->lrs_service()->WaitForLoadReport(); |
|
EXPECT_THAT( |
|
load_report, |
|
::testing::ElementsAre( |
|
::testing::AllOf( |
|
::testing::Property(&ClientStats::cluster_name, |
|
kDefaultClusterName), |
|
::testing::Property(&ClientStats::eds_service_name, |
|
kDefaultEdsServiceName), |
|
::testing::Property( |
|
&ClientStats::locality_stats, |
|
::testing::ElementsAre(::testing::Pair( |
|
"locality0", |
|
::testing::AllOf( |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_successful_requests, |
|
::testing::Lt(num_rpcs)), |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_requests_in_progress, |
|
0UL), |
|
::testing::Field( |
|
&ClientStats::LocalityStats::total_error_requests, |
|
0UL), |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_issued_requests, |
|
::testing::Le(num_rpcs)))))), |
|
::testing::Property(&ClientStats::total_dropped_requests, 0UL)), |
|
::testing::AllOf( |
|
::testing::Property(&ClientStats::cluster_name, kNewClusterName), |
|
::testing::Property(&ClientStats::eds_service_name, |
|
kNewEdsServiceName), |
|
::testing::Property( |
|
&ClientStats::locality_stats, |
|
::testing::ElementsAre(::testing::Pair( |
|
"locality1", |
|
::testing::AllOf( |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_successful_requests, |
|
::testing::Le(num_rpcs)), |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_requests_in_progress, |
|
0UL), |
|
::testing::Field( |
|
&ClientStats::LocalityStats::total_error_requests, |
|
0UL), |
|
::testing::Field(&ClientStats::LocalityStats:: |
|
total_issued_requests, |
|
::testing::Le(num_rpcs)))))), |
|
::testing::Property(&ClientStats::total_dropped_requests, 0UL)))); |
|
size_t total_ok = 0; |
|
for (const ClientStats& client_stats : load_report) { |
|
total_ok += client_stats.total_successful_requests(); |
|
} |
|
EXPECT_EQ(total_ok, num_rpcs); |
|
// The LRS service got a single request, and sent a single response. |
|
EXPECT_EQ(1U, balancer_->lrs_service()->request_count()); |
|
EXPECT_EQ(1U, balancer_->lrs_service()->response_count()); |
|
} |
|
|
|
// Tests that the drop stats are correctly reported by client load reporting. |
|
TEST_P(ClientLoadReportingTest, DropStats) { |
|
CreateAndStartBackends(1); |
|
const uint32_t kDropPerMillionForLb = 100000; |
|
const uint32_t kDropPerMillionForThrottle = 200000; |
|
const double kErrorTolerance = 0.05; |
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0; |
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0; |
|
const double kDropRateForLbAndThrottle = |
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle; |
|
const size_t kNumRpcs = |
|
ComputeIdealNumRpcs(kDropRateForLbAndThrottle, kErrorTolerance); |
|
// The ADS response contains two drop categories. |
|
EdsResourceArgs args({{"locality0", CreateEndpointsForBackends()}}); |
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}, |
|
{kThrottleDropType, kDropPerMillionForThrottle}}; |
|
balancer_->ads_service()->SetEdsResource(BuildEdsResource(args)); |
|
// Send kNumRpcs RPCs and count the drops. |
|
size_t num_drops = SendRpcsAndCountFailuresWithMessage( |
|
DEBUG_LOCATION, kNumRpcs, StatusCode::UNAVAILABLE, |
|
kStatusMessageDropPrefix); |
|
// The drop rate should be roughly equal to the expectation. |
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs; |
|
EXPECT_THAT(seen_drop_rate, ::testing::DoubleNear(kDropRateForLbAndThrottle, |
|
kErrorTolerance)); |
|
// Check client stats. |
|
ClientStats client_stats; |
|
do { |
|
std::vector<ClientStats> load_reports = |
|
balancer_->lrs_service()->WaitForLoadReport(); |
|
for (const auto& load_report : load_reports) { |
|
client_stats += load_report; |
|
} |
|
} while (client_stats.total_issued_requests() + |
|
client_stats.total_dropped_requests() < |
|
kNumRpcs); |
|
EXPECT_EQ(num_drops, client_stats.total_dropped_requests()); |
|
EXPECT_THAT(static_cast<double>(client_stats.dropped_requests(kLbDropType)) / |
|
kNumRpcs, |
|
::testing::DoubleNear(kDropRateForLb, kErrorTolerance)); |
|
EXPECT_THAT( |
|
static_cast<double>(client_stats.dropped_requests(kThrottleDropType)) / |
|
(kNumRpcs * (1 - kDropRateForLb)), |
|
::testing::DoubleNear(kDropRateForThrottle, kErrorTolerance)); |
|
} |
|
|
|
} // 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. |
|
GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1); |
|
#if TARGET_OS_IPHONE |
|
// Workaround Apple CFStream bug |
|
grpc_core::SetEnv("grpc_cfstream", "0"); |
|
#endif |
|
grpc_init(); |
|
grpc::testing::ConnectionAttemptInjector::Init(); |
|
const auto result = RUN_ALL_TESTS(); |
|
grpc_shutdown(); |
|
return result; |
|
}
|
|
|