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/*
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*
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* Copyright 2017 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include <deque>
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#include <memory>
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#include <mutex>
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#include <numeric>
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#include <set>
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#include <sstream>
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#include <thread>
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#include <grpc/grpc.h>
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#include <grpc/support/alloc.h>
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#include <grpc/support/log.h>
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#include <grpc/support/string_util.h>
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#include <grpc/support/time.h>
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#include <grpcpp/channel.h>
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#include <grpcpp/client_context.h>
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#include <grpcpp/create_channel.h>
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#include <grpcpp/server.h>
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#include <grpcpp/server_builder.h>
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#include "absl/strings/str_cat.h"
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#include "absl/types/optional.h"
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#include "src/core/ext/filters/client_channel/backup_poller.h"
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#include "src/core/ext/filters/client_channel/parse_address.h"
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#include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h"
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#include "src/core/ext/filters/client_channel/server_address.h"
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#include "src/core/ext/filters/client_channel/xds/xds_api.h"
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#include "src/core/lib/gpr/env.h"
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#include "src/core/lib/gpr/tmpfile.h"
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#include "src/core/lib/gprpp/map.h"
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#include "src/core/lib/gprpp/ref_counted_ptr.h"
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#include "src/core/lib/gprpp/sync.h"
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#include "src/core/lib/iomgr/sockaddr.h"
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#include "src/core/lib/security/credentials/fake/fake_credentials.h"
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#include "src/cpp/client/secure_credentials.h"
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#include "src/cpp/server/secure_server_credentials.h"
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#include "test/core/util/port.h"
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#include "test/core/util/test_config.h"
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#include "test/cpp/end2end/test_service_impl.h"
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#include "src/proto/grpc/testing/echo.grpc.pb.h"
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#include "src/proto/grpc/testing/xds/ads_for_test.grpc.pb.h"
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#include "src/proto/grpc/testing/xds/cds_for_test.grpc.pb.h"
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#include "src/proto/grpc/testing/xds/eds_for_test.grpc.pb.h"
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#include "src/proto/grpc/testing/xds/lds_rds_for_test.grpc.pb.h"
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#include "src/proto/grpc/testing/xds/lrs_for_test.grpc.pb.h"
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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// TODO(dgq): Other scenarios in need of testing:
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// - Send a serverlist with faulty ip:port addresses (port > 2^16, etc).
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// - Test reception of invalid serverlist
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// - Test against a non-LB server.
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// - Random LB server closing the stream unexpectedly.
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//
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// Findings from end to end testing to be covered here:
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// - Handling of LB servers restart, including reconnection after backing-off
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// retries.
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// - Destruction of load balanced channel (and therefore of xds instance)
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// while:
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// 1) the internal LB call is still active. This should work by virtue
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// of the weak reference the LB call holds. The call should be terminated as
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// part of the xds shutdown process.
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// 2) the retry timer is active. Again, the weak reference it holds should
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// prevent a premature call to \a glb_destroy.
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namespace grpc {
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namespace testing {
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namespace {
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using std::chrono::system_clock;
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using ::envoy::api::v2::Cluster;
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using ::envoy::api::v2::ClusterLoadAssignment;
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using ::envoy::api::v2::DiscoveryRequest;
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using ::envoy::api::v2::DiscoveryResponse;
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using ::envoy::api::v2::FractionalPercent;
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using ::envoy::api::v2::HttpConnectionManager;
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using ::envoy::api::v2::Listener;
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using ::envoy::api::v2::RouteConfiguration;
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using ::envoy::service::discovery::v2::AggregatedDiscoveryService;
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using ::envoy::service::load_stats::v2::ClusterStats;
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using ::envoy::service::load_stats::v2::LoadReportingService;
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using ::envoy::service::load_stats::v2::LoadStatsRequest;
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using ::envoy::service::load_stats::v2::LoadStatsResponse;
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using ::envoy::service::load_stats::v2::UpstreamLocalityStats;
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constexpr char kLdsTypeUrl[] = "type.googleapis.com/envoy.api.v2.Listener";
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constexpr char kRdsTypeUrl[] =
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"type.googleapis.com/envoy.api.v2.RouteConfiguration";
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constexpr char kCdsTypeUrl[] = "type.googleapis.com/envoy.api.v2.Cluster";
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constexpr char kEdsTypeUrl[] =
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"type.googleapis.com/envoy.api.v2.ClusterLoadAssignment";
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constexpr char kDefaultLocalityRegion[] = "xds_default_locality_region";
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constexpr char kDefaultLocalityZone[] = "xds_default_locality_zone";
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constexpr char kLbDropType[] = "lb";
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constexpr char kThrottleDropType[] = "throttle";
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constexpr char kDefaultResourceName[] = "application_target_name";
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constexpr int kDefaultLocalityWeight = 3;
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constexpr int kDefaultLocalityPriority = 0;
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constexpr char kBootstrapFile[] =
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"{\n"
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" \"xds_servers\": [\n"
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" {\n"
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" \"server_uri\": \"fake:///lb\",\n"
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" \"channel_creds\": [\n"
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" {\n"
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" \"type\": \"fake\"\n"
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" }\n"
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" ]\n"
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" }\n"
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" ],\n"
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" \"node\": {\n"
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" \"id\": \"xds_end2end_test\",\n"
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" \"cluster\": \"test\",\n"
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" \"metadata\": {\n"
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" \"foo\": \"bar\"\n"
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" },\n"
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" \"locality\": {\n"
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" \"region\": \"corp\",\n"
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" \"zone\": \"svl\",\n"
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" \"subzone\": \"mp3\"\n"
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" }\n"
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" }\n"
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"}\n";
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constexpr char kBootstrapFileBad[] =
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"{\n"
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" \"xds_servers\": [\n"
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" {\n"
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" \"server_uri\": \"fake:///wrong_lb\",\n"
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" \"channel_creds\": [\n"
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" {\n"
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" \"type\": \"fake\"\n"
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" }\n"
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" ]\n"
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" }\n"
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" ],\n"
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" \"node\": {\n"
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" }\n"
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"}\n";
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char* g_bootstrap_file;
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char* g_bootstrap_file_bad;
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void WriteBootstrapFiles() {
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char* bootstrap_file;
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FILE* out = gpr_tmpfile("xds_bootstrap", &bootstrap_file);
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fputs(kBootstrapFile, out);
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fclose(out);
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g_bootstrap_file = bootstrap_file;
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out = gpr_tmpfile("xds_bootstrap_bad", &bootstrap_file);
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fputs(kBootstrapFileBad, out);
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fclose(out);
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g_bootstrap_file_bad = bootstrap_file;
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}
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// Helper class to minimize the number of unique ports we use for this test.
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class PortSaver {
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public:
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int GetPort() {
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if (idx_ >= ports_.size()) {
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ports_.push_back(grpc_pick_unused_port_or_die());
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}
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return ports_[idx_++];
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}
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void Reset() { idx_ = 0; }
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private:
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std::vector<int> ports_;
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size_t idx_ = 0;
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};
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PortSaver* g_port_saver = nullptr;
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template <typename ServiceType>
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class CountedService : public ServiceType {
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public:
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size_t request_count() {
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grpc_core::MutexLock lock(&mu_);
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return request_count_;
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}
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size_t response_count() {
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grpc_core::MutexLock lock(&mu_);
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return response_count_;
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}
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void IncreaseResponseCount() {
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grpc_core::MutexLock lock(&mu_);
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++response_count_;
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}
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void IncreaseRequestCount() {
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grpc_core::MutexLock lock(&mu_);
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++request_count_;
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}
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void ResetCounters() {
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grpc_core::MutexLock lock(&mu_);
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request_count_ = 0;
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response_count_ = 0;
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}
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protected:
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grpc_core::Mutex mu_;
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private:
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size_t request_count_ = 0;
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size_t response_count_ = 0;
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};
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using BackendService = CountedService<TestServiceImpl>;
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using LrsService = CountedService<LoadReportingService::Service>;
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const char g_kCallCredsMdKey[] = "Balancer should not ...";
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const char g_kCallCredsMdValue[] = "... receive me";
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class BackendServiceImpl : public BackendService {
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public:
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BackendServiceImpl() {}
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Status Echo(ServerContext* context, const EchoRequest* request,
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EchoResponse* response) override {
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// Backend should receive the call credentials metadata.
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auto call_credentials_entry =
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context->client_metadata().find(g_kCallCredsMdKey);
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EXPECT_NE(call_credentials_entry, context->client_metadata().end());
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if (call_credentials_entry != context->client_metadata().end()) {
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EXPECT_EQ(call_credentials_entry->second, g_kCallCredsMdValue);
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}
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IncreaseRequestCount();
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const auto status = TestServiceImpl::Echo(context, request, response);
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IncreaseResponseCount();
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AddClient(context->peer());
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return status;
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}
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void Start() {}
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void Shutdown() {}
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std::set<grpc::string> clients() {
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grpc_core::MutexLock lock(&clients_mu_);
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return clients_;
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}
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private:
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void AddClient(const grpc::string& client) {
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grpc_core::MutexLock lock(&clients_mu_);
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clients_.insert(client);
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}
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grpc_core::Mutex mu_;
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grpc_core::Mutex clients_mu_;
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std::set<grpc::string> clients_;
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};
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class ClientStats {
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public:
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struct LocalityStats {
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// Converts from proto message class.
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LocalityStats(const UpstreamLocalityStats& upstream_locality_stats)
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: total_successful_requests(
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upstream_locality_stats.total_successful_requests()),
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total_requests_in_progress(
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upstream_locality_stats.total_requests_in_progress()),
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total_error_requests(upstream_locality_stats.total_error_requests()),
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total_issued_requests(
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upstream_locality_stats.total_issued_requests()) {}
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uint64_t total_successful_requests;
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uint64_t total_requests_in_progress;
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uint64_t total_error_requests;
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uint64_t total_issued_requests;
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};
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// Converts from proto message class.
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ClientStats(const ClusterStats& cluster_stats)
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: total_dropped_requests_(cluster_stats.total_dropped_requests()) {
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for (const auto& input_locality_stats :
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cluster_stats.upstream_locality_stats()) {
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locality_stats_.emplace(input_locality_stats.locality().sub_zone(),
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LocalityStats(input_locality_stats));
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}
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for (const auto& input_dropped_requests :
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cluster_stats.dropped_requests()) {
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dropped_requests_.emplace(input_dropped_requests.category(),
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input_dropped_requests.dropped_count());
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}
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}
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uint64_t total_successful_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_successful_requests;
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}
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return sum;
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}
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uint64_t total_requests_in_progress() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_requests_in_progress;
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}
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return sum;
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}
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uint64_t total_error_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_error_requests;
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}
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return sum;
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}
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uint64_t total_issued_requests() const {
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uint64_t sum = 0;
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for (auto& p : locality_stats_) {
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sum += p.second.total_issued_requests;
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}
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return sum;
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}
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uint64_t total_dropped_requests() const { return total_dropped_requests_; }
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uint64_t dropped_requests(const grpc::string& category) const {
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auto iter = dropped_requests_.find(category);
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GPR_ASSERT(iter != dropped_requests_.end());
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return iter->second;
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}
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private:
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std::map<grpc::string, LocalityStats> locality_stats_;
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uint64_t total_dropped_requests_;
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std::map<grpc::string, uint64_t> dropped_requests_;
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};
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// TODO(roth): Change this service to a real fake.
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class AdsServiceImpl : public AggregatedDiscoveryService::Service,
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public std::enable_shared_from_this<AdsServiceImpl> {
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public:
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enum ResponseState {
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NOT_SENT,
|
|
|
|
SENT,
|
|
|
|
ACKED,
|
|
|
|
NACKED,
|
|
|
|
};
|
|
|
|
|
|
|
|
struct EdsResourceArgs {
|
|
|
|
struct Locality {
|
|
|
|
Locality(const grpc::string& sub_zone, std::vector<int> ports,
|
|
|
|
int lb_weight = kDefaultLocalityWeight,
|
|
|
|
int priority = kDefaultLocalityPriority,
|
|
|
|
std::vector<envoy::api::v2::HealthStatus> health_statuses = {})
|
|
|
|
: sub_zone(std::move(sub_zone)),
|
|
|
|
ports(std::move(ports)),
|
|
|
|
lb_weight(lb_weight),
|
|
|
|
priority(priority),
|
|
|
|
health_statuses(std::move(health_statuses)) {}
|
|
|
|
|
|
|
|
const grpc::string sub_zone;
|
|
|
|
std::vector<int> ports;
|
|
|
|
int lb_weight;
|
|
|
|
int priority;
|
|
|
|
std::vector<envoy::api::v2::HealthStatus> health_statuses;
|
|
|
|
};
|
|
|
|
|
|
|
|
EdsResourceArgs() = default;
|
|
|
|
explicit EdsResourceArgs(std::vector<Locality> locality_list)
|
|
|
|
: locality_list(std::move(locality_list)) {}
|
|
|
|
|
|
|
|
std::vector<Locality> locality_list;
|
|
|
|
std::map<grpc::string, uint32_t> drop_categories;
|
|
|
|
FractionalPercent::DenominatorType drop_denominator =
|
|
|
|
FractionalPercent::MILLION;
|
|
|
|
};
|
|
|
|
|
|
|
|
using Stream = ServerReaderWriter<DiscoveryResponse, DiscoveryRequest>;
|
|
|
|
using ResponseDelayPair = std::pair<DiscoveryResponse, int>;
|
|
|
|
|
|
|
|
// A queue of resource type/name pairs that have changed since the client
|
|
|
|
// subscribed to them.
|
|
|
|
using UpdateQueue = std::deque<
|
|
|
|
std::pair<std::string /* type url */, std::string /* resource name */>>;
|
|
|
|
|
|
|
|
// A struct representing a client's subscription to a particular resource.
|
|
|
|
struct SubscriberState {
|
|
|
|
// Version that the client currently knows about.
|
|
|
|
int current_version = 0;
|
|
|
|
// The queue upon which to place updates when the resource is updated.
|
|
|
|
UpdateQueue* update_queue;
|
|
|
|
};
|
|
|
|
|
|
|
|
// A struct representing the a client's subscription to all the resources.
|
|
|
|
using SubscriptionMap =
|
|
|
|
std::map<std::string /* type_url */,
|
|
|
|
std::map<std::string /* resource_name */, SubscriberState>>;
|
|
|
|
|
|
|
|
// A struct representing the current state for a resource:
|
|
|
|
// - the version of the resource that is set by the SetResource() methods.
|
|
|
|
// - a list of subscribers interested in this resource.
|
|
|
|
struct ResourceState {
|
|
|
|
int version = 0;
|
|
|
|
absl::optional<google::protobuf::Any> resource;
|
|
|
|
std::set<SubscriberState*> subscribers;
|
|
|
|
};
|
|
|
|
|
|
|
|
// A struct representing the current state for all resources:
|
|
|
|
// LDS, CDS, EDS, and RDS for the class as a whole.
|
|
|
|
using ResourcesMap =
|
|
|
|
std::map<std::string, std::map<std::string, ResourceState>>;
|
|
|
|
|
|
|
|
AdsServiceImpl(bool enable_load_reporting) {
|
|
|
|
// Construct RDS response data.
|
|
|
|
default_route_config_.set_name(kDefaultResourceName);
|
|
|
|
auto* virtual_host = default_route_config_.add_virtual_hosts();
|
|
|
|
virtual_host->add_domains("*");
|
|
|
|
auto* route = virtual_host->add_routes();
|
|
|
|
route->mutable_match()->set_prefix("");
|
|
|
|
route->mutable_route()->set_cluster(kDefaultResourceName);
|
|
|
|
SetRdsResource(default_route_config_, kDefaultResourceName);
|
|
|
|
// Construct LDS response data (with inlined RDS result).
|
|
|
|
default_listener_ = BuildListener(default_route_config_);
|
|
|
|
SetLdsResource(default_listener_, kDefaultResourceName);
|
|
|
|
// Construct CDS response data.
|
|
|
|
default_cluster_.set_name(kDefaultResourceName);
|
|
|
|
default_cluster_.set_type(envoy::api::v2::Cluster::EDS);
|
|
|
|
default_cluster_.mutable_eds_cluster_config()
|
|
|
|
->mutable_eds_config()
|
|
|
|
->mutable_ads();
|
|
|
|
default_cluster_.set_lb_policy(envoy::api::v2::Cluster::ROUND_ROBIN);
|
|
|
|
if (enable_load_reporting) {
|
|
|
|
default_cluster_.mutable_lrs_server()->mutable_self();
|
|
|
|
}
|
|
|
|
SetCdsResource(default_cluster_, kDefaultResourceName);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Starting a thread to do blocking read on the stream until cancel.
|
|
|
|
void BlockingRead(Stream* stream, std::deque<DiscoveryRequest>* requests,
|
|
|
|
bool* stream_closed) {
|
|
|
|
DiscoveryRequest request;
|
|
|
|
bool seen_first_request = false;
|
|
|
|
while (stream->Read(&request)) {
|
|
|
|
if (!seen_first_request) {
|
|
|
|
EXPECT_TRUE(request.has_node());
|
|
|
|
ASSERT_FALSE(request.node().client_features().empty());
|
|
|
|
EXPECT_EQ(request.node().client_features(0),
|
|
|
|
"envoy.lb.does_not_support_overprovisioning");
|
|
|
|
seen_first_request = true;
|
|
|
|
}
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
requests->emplace_back(std::move(request));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: Null read, stream closed", this);
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
*stream_closed = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Checks whether the client needs to receive a newer version of
|
|
|
|
// the resource.
|
|
|
|
bool ClientNeedsResourceUpdate(const string& resource_type,
|
|
|
|
const string& name,
|
|
|
|
SubscriptionMap* subscription_map) {
|
|
|
|
auto subscriber_it = (*subscription_map)[resource_type].find(name);
|
|
|
|
if (subscriber_it == (*subscription_map)[resource_type].end()) {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Skipping an unsubscribed update for resource %s and "
|
|
|
|
"name %s",
|
|
|
|
this, resource_type.c_str(), name.c_str());
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
const auto& resource_state = resources_map_[resource_type][name];
|
|
|
|
if (subscriber_it->second.current_version < resource_state.version) {
|
|
|
|
subscriber_it->second.current_version = resource_state.version;
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Need to process new %s update %s, bring current to %d",
|
|
|
|
this, resource_type.c_str(), name.c_str(),
|
|
|
|
subscriber_it->second.current_version);
|
|
|
|
return true;
|
|
|
|
} else {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Skipping an old %s update %s, current is at %d", this,
|
|
|
|
resource_type.c_str(), name.c_str(),
|
|
|
|
subscriber_it->second.current_version);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Resource subscription:
|
|
|
|
// 1. inserting an entry into the subscription map indexed by resource
|
|
|
|
// type/name pair.
|
|
|
|
// 2. inserting or updating an entry into the resources map indexed
|
|
|
|
// by resource type/name pair about this subscription.
|
|
|
|
void ResourceSubscribe(const std::string& resource_type,
|
|
|
|
const std::string& name, UpdateQueue* update_queue,
|
|
|
|
SubscriptionMap* subscription_map) {
|
|
|
|
SubscriberState& subscriber_state =
|
|
|
|
(*subscription_map)[resource_type][name];
|
|
|
|
subscriber_state.update_queue = update_queue;
|
|
|
|
ResourceState& resource_state = resources_map_[resource_type][name];
|
|
|
|
resource_state.subscribers.emplace(&subscriber_state);
|
|
|
|
gpr_log(
|
|
|
|
GPR_INFO,
|
|
|
|
"ADS[%p]: subscribe to resource type %s name %s version %d state %p",
|
|
|
|
this, resource_type.c_str(), name.c_str(), resource_state.version,
|
|
|
|
&subscriber_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Resource unsubscription:
|
|
|
|
// 1. update the entry in the resources map indexed
|
|
|
|
// by resource type/name pair to remove this subscription
|
|
|
|
// 2. remove this entry from the subscription map.
|
|
|
|
// 3. remove this resource type from the subscription map if there are no more
|
|
|
|
// resources subscribed for the resource type.
|
|
|
|
void ResourceUnsubscribe(const std::string& resource_type,
|
|
|
|
const std::string& name,
|
|
|
|
SubscriptionMap* subscription_map) {
|
|
|
|
auto subscription_by_type_it = subscription_map->find(resource_type);
|
|
|
|
if (subscription_by_type_it == subscription_map->end()) {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: resource type %s not subscribed", this,
|
|
|
|
resource_type.c_str());
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
auto& subscription_by_type_map = subscription_by_type_it->second;
|
|
|
|
auto subscription_it = subscription_by_type_map.find(name);
|
|
|
|
if (subscription_it == subscription_by_type_map.end()) {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: resource name %s of type %s not subscribed",
|
|
|
|
this, name.c_str(), resource_type.c_str());
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Unsubscribe to resource type %s name %s state %p", this,
|
|
|
|
resource_type.c_str(), name.c_str(), &subscription_it->second);
|
|
|
|
auto resource_by_type_it = resources_map_.find(resource_type);
|
|
|
|
GPR_ASSERT(resource_by_type_it != resources_map_.end());
|
|
|
|
auto& resource_by_type_map = resource_by_type_it->second;
|
|
|
|
auto resource_it = resource_by_type_map.find(name);
|
|
|
|
GPR_ASSERT(resource_it != resource_by_type_map.end());
|
|
|
|
resource_it->second.subscribers.erase(&subscription_it->second);
|
|
|
|
if (resource_it->second.subscribers.empty() &&
|
|
|
|
!resource_it->second.resource.has_value()) {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Erasing resource type %s name %s from resource map "
|
|
|
|
"since there are no more subscribers for this unset resource",
|
|
|
|
this, resource_type.c_str(), name.c_str());
|
|
|
|
resource_by_type_map.erase(resource_it);
|
|
|
|
}
|
|
|
|
subscription_by_type_map.erase(subscription_it);
|
|
|
|
if (subscription_by_type_map.empty()) {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Erasing resource type %s from subscription_map", this,
|
|
|
|
resource_type.c_str());
|
|
|
|
subscription_map->erase(subscription_by_type_it);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Completing the building a DiscoveryResponse by adding common information
|
|
|
|
// for all resources and by adding all subscribed resources for LDS and CDS.
|
|
|
|
void CompleteBuildingDiscoveryResponse(
|
|
|
|
const std::string& resource_type, const int version,
|
|
|
|
const SubscriptionMap& subscription_map,
|
|
|
|
const std::set<std::string>& resources_added_to_response,
|
|
|
|
DiscoveryResponse* response) {
|
|
|
|
resource_type_response_state_[resource_type] = SENT;
|
|
|
|
response->set_type_url(resource_type);
|
|
|
|
response->set_version_info(absl::StrCat(version));
|
|
|
|
response->set_nonce(absl::StrCat(version));
|
|
|
|
if (resource_type == kLdsTypeUrl || resource_type == kCdsTypeUrl) {
|
|
|
|
// For LDS and CDS we must send back all subscribed resources
|
|
|
|
// (even the unchanged ones)
|
|
|
|
auto subscription_map_by_type_it = subscription_map.find(resource_type);
|
|
|
|
GPR_ASSERT(subscription_map_by_type_it != subscription_map.end());
|
|
|
|
for (const auto& subscription : subscription_map_by_type_it->second) {
|
|
|
|
if (resources_added_to_response.find(subscription.first) ==
|
|
|
|
resources_added_to_response.end()) {
|
|
|
|
absl::optional<google::protobuf::Any>& resource =
|
|
|
|
resources_map_[resource_type][subscription.first].resource;
|
|
|
|
if (resource.has_value()) {
|
|
|
|
response->add_resources()->CopyFrom(resource.value());
|
|
|
|
} else {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: Unknown resource type %s and name %s",
|
|
|
|
this, resource_type.c_str(), subscription.first.c_str());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
Status StreamAggregatedResources(ServerContext* context,
|
|
|
|
Stream* stream) override {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: StreamAggregatedResources starts", this);
|
|
|
|
[&]() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
if (ads_done_) return;
|
|
|
|
}
|
|
|
|
// Balancer shouldn't receive the call credentials metadata.
|
|
|
|
EXPECT_EQ(context->client_metadata().find(g_kCallCredsMdKey),
|
|
|
|
context->client_metadata().end());
|
|
|
|
// Resources (type/name pairs) that have changed since the client
|
|
|
|
// subscribed to them.
|
|
|
|
UpdateQueue update_queue;
|
|
|
|
// Resources that the client will be subscribed to keyed by resource type
|
|
|
|
// url.
|
|
|
|
SubscriptionMap subscription_map;
|
|
|
|
std::map<std::string, SubscriberState> subscriber_map;
|
|
|
|
// Current Version map keyed by resource type url.
|
|
|
|
std::map<std::string, int> resource_type_version;
|
|
|
|
// Creating blocking thread to read from stream.
|
|
|
|
std::deque<DiscoveryRequest> requests;
|
|
|
|
bool stream_closed = false;
|
|
|
|
// Take a reference of the AdsServiceImpl object, reference will go
|
|
|
|
// out of scope after the reader thread is joined.
|
|
|
|
std::shared_ptr<AdsServiceImpl> ads_service_impl = shared_from_this();
|
|
|
|
std::thread reader(std::bind(&AdsServiceImpl::BlockingRead, this, stream,
|
|
|
|
&requests, &stream_closed));
|
|
|
|
// Main loop to look for requests and updates.
|
|
|
|
while (true) {
|
|
|
|
// Look for new requests and and decide what to handle.
|
|
|
|
DiscoveryResponse response;
|
|
|
|
// Boolean to keep track if the loop received any work to do: a request
|
|
|
|
// or an update; regardless whether a response was actually sent out.
|
|
|
|
bool did_work = false;
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
if (stream_closed) break;
|
|
|
|
if (!requests.empty()) {
|
|
|
|
DiscoveryRequest request = std::move(requests.front());
|
|
|
|
requests.pop_front();
|
|
|
|
did_work = true;
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: Handling request %s with content %s",
|
|
|
|
this, request.type_url().c_str(),
|
|
|
|
request.DebugString().c_str());
|
|
|
|
// Identify ACK and NACK by looking for version information and
|
|
|
|
// comparing it to nonce (this server ensures they are always set to
|
|
|
|
// the same in a response.)
|
|
|
|
if (!request.response_nonce().empty()) {
|
|
|
|
resource_type_response_state_[request.type_url()] =
|
|
|
|
(!request.version_info().empty() &&
|
|
|
|
request.version_info() == request.response_nonce())
|
|
|
|
? ACKED
|
|
|
|
: NACKED;
|
|
|
|
}
|
|
|
|
// As long as the test did not tell us to ignore this type of
|
|
|
|
// request, we will loop through all resources to:
|
|
|
|
// 1. subscribe if necessary
|
|
|
|
// 2. update if necessary
|
|
|
|
// 3. unsubscribe if necessary
|
|
|
|
if (resource_types_to_ignore_.find(request.type_url()) ==
|
|
|
|
resource_types_to_ignore_.end()) {
|
|
|
|
std::set<std::string> resources_in_current_request;
|
|
|
|
std::set<std::string> resources_added_to_response;
|
|
|
|
for (const std::string& resource_name :
|
|
|
|
request.resource_names()) {
|
|
|
|
resources_in_current_request.emplace(resource_name);
|
|
|
|
auto subscriber_it =
|
|
|
|
subscription_map[request.type_url()].find(resource_name);
|
|
|
|
if (subscriber_it ==
|
|
|
|
subscription_map[request.type_url()].end()) {
|
|
|
|
ResourceSubscribe(request.type_url(), resource_name,
|
|
|
|
&update_queue, &subscription_map);
|
|
|
|
}
|
|
|
|
if (ClientNeedsResourceUpdate(request.type_url(), resource_name,
|
|
|
|
&subscription_map)) {
|
|
|
|
resources_added_to_response.emplace(resource_name);
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Handling resource type %s and name %s",
|
|
|
|
this, request.type_url().c_str(),
|
|
|
|
resource_name.c_str());
|
|
|
|
auto resource =
|
|
|
|
resources_map_[request.type_url()][resource_name];
|
|
|
|
GPR_ASSERT(resource.resource.has_value());
|
|
|
|
response.add_resources()->CopyFrom(resource.resource.value());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Remove subscriptions no longer requested: build a list of
|
|
|
|
// unsubscriber names first while iterating the subscription_map
|
|
|
|
// and then erase from the subscription_map in
|
|
|
|
// ResourceUnsubscribe.
|
|
|
|
std::set<std::string> unsubscriber_list;
|
|
|
|
for (const auto& subscription :
|
|
|
|
subscription_map[request.type_url()]) {
|
|
|
|
if (resources_in_current_request.find(subscription.first) ==
|
|
|
|
resources_in_current_request.end()) {
|
|
|
|
unsubscriber_list.emplace(subscription.first);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
for (const auto& name : unsubscriber_list) {
|
|
|
|
ResourceUnsubscribe(request.type_url(), name,
|
|
|
|
&subscription_map);
|
|
|
|
}
|
|
|
|
if (!response.resources().empty()) {
|
|
|
|
CompleteBuildingDiscoveryResponse(
|
|
|
|
request.type_url(),
|
|
|
|
++resource_type_version[request.type_url()],
|
|
|
|
subscription_map, resources_added_to_response, &response);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!response.resources().empty()) {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: sending request response '%s'", this,
|
|
|
|
response.DebugString().c_str());
|
|
|
|
stream->Write(response);
|
|
|
|
}
|
|
|
|
response.Clear();
|
|
|
|
// Look for updates and decide what to handle.
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
if (!update_queue.empty()) {
|
|
|
|
std::pair<std::string, std::string> update =
|
|
|
|
std::move(update_queue.front());
|
|
|
|
update_queue.pop_front();
|
|
|
|
did_work = true;
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: Handling update type %s name %s", this,
|
|
|
|
update.first.c_str(), update.second.c_str());
|
|
|
|
auto subscriber_it =
|
|
|
|
subscription_map[update.first].find(update.second);
|
|
|
|
if (subscriber_it != subscription_map[update.first].end()) {
|
|
|
|
if (ClientNeedsResourceUpdate(update.first, update.second,
|
|
|
|
&subscription_map)) {
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"ADS[%p]: Updating resource type %s and name %s", this,
|
|
|
|
update.first.c_str(), update.second.c_str());
|
|
|
|
auto resource = resources_map_[update.first][update.second];
|
|
|
|
GPR_ASSERT(resource.resource.has_value());
|
|
|
|
response.add_resources()->CopyFrom(resource.resource.value());
|
|
|
|
CompleteBuildingDiscoveryResponse(
|
|
|
|
update.first, ++resource_type_version[update.first],
|
|
|
|
subscription_map, {update.second}, &response);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!response.resources().empty()) {
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: sending update response '%s'", this,
|
|
|
|
response.DebugString().c_str());
|
|
|
|
stream->Write(response);
|
|
|
|
}
|
|
|
|
// If we didn't find anything to do, delay before the next loop
|
|
|
|
// iteration; otherwise, check whether we should exit and then
|
|
|
|
// immediately continue.
|
|
|
|
gpr_timespec deadline =
|
|
|
|
grpc_timeout_milliseconds_to_deadline(did_work ? 0 : 10);
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
if (!ads_cond_.WaitUntil(&ads_mu_, [this] { return ads_done_; },
|
|
|
|
deadline))
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
reader.join();
|
|
|
|
}();
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: StreamAggregatedResources done", this);
|
|
|
|
return Status::OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
Listener default_listener() const { return default_listener_; }
|
|
|
|
RouteConfiguration default_route_config() const {
|
|
|
|
return default_route_config_;
|
|
|
|
}
|
|
|
|
Cluster default_cluster() const { return default_cluster_; }
|
|
|
|
|
|
|
|
ResponseState lds_response_state() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
return resource_type_response_state_[kLdsTypeUrl];
|
|
|
|
}
|
|
|
|
|
|
|
|
ResponseState rds_response_state() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
return resource_type_response_state_[kRdsTypeUrl];
|
|
|
|
}
|
|
|
|
|
|
|
|
ResponseState cds_response_state() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
return resource_type_response_state_[kCdsTypeUrl];
|
|
|
|
}
|
|
|
|
|
|
|
|
ResponseState eds_response_state() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
return resource_type_response_state_[kEdsTypeUrl];
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetResourceIgnore(const std::string& type_url) {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
resource_types_to_ignore_.emplace(type_url);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetResource(google::protobuf::Any resource, const std::string& type_url,
|
|
|
|
const std::string& name) {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
ResourceState& state = resources_map_[type_url][name];
|
|
|
|
++state.version;
|
|
|
|
state.resource = std::move(resource);
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: Updating %s resource %s to version %u", this,
|
|
|
|
type_url.c_str(), name.c_str(), state.version);
|
|
|
|
for (SubscriberState* subscriber : state.subscribers) {
|
|
|
|
subscriber->update_queue->emplace_back(type_url, name);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetLdsResource(const Listener& listener, const std::string& name) {
|
|
|
|
google::protobuf::Any resource;
|
|
|
|
resource.PackFrom(listener);
|
|
|
|
SetResource(std::move(resource), kLdsTypeUrl, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetRdsResource(const RouteConfiguration& route,
|
|
|
|
const std::string& name) {
|
|
|
|
google::protobuf::Any resource;
|
|
|
|
resource.PackFrom(route);
|
|
|
|
SetResource(std::move(resource), kRdsTypeUrl, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetCdsResource(const Cluster& cluster, const std::string& name) {
|
|
|
|
google::protobuf::Any resource;
|
|
|
|
resource.PackFrom(cluster);
|
|
|
|
SetResource(std::move(resource), kCdsTypeUrl, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetEdsResource(const ClusterLoadAssignment& assignment,
|
|
|
|
const std::string& name) {
|
|
|
|
google::protobuf::Any resource;
|
|
|
|
resource.PackFrom(assignment);
|
|
|
|
SetResource(std::move(resource), kEdsTypeUrl, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetLdsToUseDynamicRds() {
|
|
|
|
auto listener = default_listener_;
|
|
|
|
HttpConnectionManager http_connection_manager;
|
|
|
|
http_connection_manager.mutable_rds()->set_route_config_name(
|
|
|
|
kDefaultResourceName);
|
|
|
|
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
|
|
|
|
http_connection_manager);
|
|
|
|
SetLdsResource(listener, kDefaultResourceName);
|
|
|
|
}
|
|
|
|
|
|
|
|
static Listener BuildListener(const RouteConfiguration& route_config) {
|
|
|
|
HttpConnectionManager http_connection_manager;
|
|
|
|
*(http_connection_manager.mutable_route_config()) = route_config;
|
|
|
|
Listener listener;
|
|
|
|
listener.set_name(kDefaultResourceName);
|
|
|
|
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
|
|
|
|
http_connection_manager);
|
|
|
|
return listener;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Start() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
ads_done_ = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
NotifyDoneWithAdsCallLocked();
|
|
|
|
resources_map_.clear();
|
|
|
|
resource_type_response_state_.clear();
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "ADS[%p]: shut down", this);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ClusterLoadAssignment BuildEdsResource(const EdsResourceArgs& args) {
|
|
|
|
ClusterLoadAssignment assignment;
|
|
|
|
assignment.set_cluster_name(kDefaultResourceName);
|
|
|
|
for (const auto& locality : args.locality_list) {
|
|
|
|
auto* endpoints = assignment.add_endpoints();
|
|
|
|
endpoints->mutable_load_balancing_weight()->set_value(locality.lb_weight);
|
|
|
|
endpoints->set_priority(locality.priority);
|
|
|
|
endpoints->mutable_locality()->set_region(kDefaultLocalityRegion);
|
|
|
|
endpoints->mutable_locality()->set_zone(kDefaultLocalityZone);
|
|
|
|
endpoints->mutable_locality()->set_sub_zone(locality.sub_zone);
|
|
|
|
for (size_t i = 0; i < locality.ports.size(); ++i) {
|
|
|
|
const int& port = locality.ports[i];
|
|
|
|
auto* lb_endpoints = endpoints->add_lb_endpoints();
|
|
|
|
if (locality.health_statuses.size() > i &&
|
|
|
|
locality.health_statuses[i] !=
|
|
|
|
envoy::api::v2::HealthStatus::UNKNOWN) {
|
|
|
|
lb_endpoints->set_health_status(locality.health_statuses[i]);
|
|
|
|
}
|
|
|
|
auto* endpoint = lb_endpoints->mutable_endpoint();
|
|
|
|
auto* address = endpoint->mutable_address();
|
|
|
|
auto* socket_address = address->mutable_socket_address();
|
|
|
|
socket_address->set_address("127.0.0.1");
|
|
|
|
socket_address->set_port_value(port);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!args.drop_categories.empty()) {
|
|
|
|
auto* policy = assignment.mutable_policy();
|
|
|
|
for (const auto& p : args.drop_categories) {
|
|
|
|
const grpc::string& name = p.first;
|
|
|
|
const uint32_t parts_per_million = p.second;
|
|
|
|
auto* drop_overload = policy->add_drop_overloads();
|
|
|
|
drop_overload->set_category(name);
|
|
|
|
auto* drop_percentage = drop_overload->mutable_drop_percentage();
|
|
|
|
drop_percentage->set_numerator(parts_per_million);
|
|
|
|
drop_percentage->set_denominator(args.drop_denominator);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return assignment;
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithAdsCall() {
|
|
|
|
grpc_core::MutexLock lock(&ads_mu_);
|
|
|
|
NotifyDoneWithAdsCallLocked();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithAdsCallLocked() {
|
|
|
|
if (!ads_done_) {
|
|
|
|
ads_done_ = true;
|
|
|
|
ads_cond_.Broadcast();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
grpc_core::CondVar ads_cond_;
|
|
|
|
// Protect the members below.
|
|
|
|
grpc_core::Mutex ads_mu_;
|
|
|
|
bool ads_done_ = false;
|
|
|
|
Listener default_listener_;
|
|
|
|
RouteConfiguration default_route_config_;
|
|
|
|
Cluster default_cluster_;
|
|
|
|
std::map<std::string /*resource type*/, ResponseState>
|
|
|
|
resource_type_response_state_;
|
|
|
|
std::set<std::string /*resource_type*/> resource_types_to_ignore_;
|
|
|
|
// An instance data member containing the current state of all resources.
|
|
|
|
// Note that an entry will exist whenever either of the following is true:
|
|
|
|
// - The resource exists (i.e., has been created by SetResource() and has not
|
|
|
|
// yet been destroyed by UnsetResource()).
|
|
|
|
// - There is at least one subscriber for the resource.
|
|
|
|
ResourcesMap resources_map_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class LrsServiceImpl : public LrsService,
|
|
|
|
public std::enable_shared_from_this<LrsServiceImpl> {
|
|
|
|
public:
|
|
|
|
using Stream = ServerReaderWriter<LoadStatsResponse, LoadStatsRequest>;
|
|
|
|
|
|
|
|
explicit LrsServiceImpl(int client_load_reporting_interval_seconds)
|
|
|
|
: client_load_reporting_interval_seconds_(
|
|
|
|
client_load_reporting_interval_seconds) {}
|
|
|
|
|
|
|
|
Status StreamLoadStats(ServerContext* /*context*/, Stream* stream) override {
|
|
|
|
gpr_log(GPR_INFO, "LRS[%p]: StreamLoadStats starts", this);
|
|
|
|
// Take a reference of the LrsServiceImpl object, reference will go
|
|
|
|
// out of scope after this method exits.
|
|
|
|
std::shared_ptr<LrsServiceImpl> lrs_service_impl = shared_from_this();
|
|
|
|
// Read request.
|
|
|
|
LoadStatsRequest request;
|
|
|
|
if (stream->Read(&request)) {
|
|
|
|
if (client_load_reporting_interval_seconds_ > 0) {
|
|
|
|
IncreaseRequestCount();
|
|
|
|
// Send response.
|
|
|
|
LoadStatsResponse response;
|
|
|
|
std::string server_name;
|
|
|
|
auto it = request.node().metadata().fields().find(
|
|
|
|
"PROXYLESS_CLIENT_HOSTNAME");
|
|
|
|
if (it != request.node().metadata().fields().end()) {
|
|
|
|
server_name = it->second.string_value();
|
|
|
|
}
|
|
|
|
GPR_ASSERT(server_name != "");
|
|
|
|
response.add_clusters(server_name);
|
|
|
|
response.mutable_load_reporting_interval()->set_seconds(
|
|
|
|
client_load_reporting_interval_seconds_);
|
|
|
|
stream->Write(response);
|
|
|
|
IncreaseResponseCount();
|
|
|
|
// Wait for report.
|
|
|
|
request.Clear();
|
|
|
|
if (stream->Read(&request)) {
|
|
|
|
gpr_log(GPR_INFO, "LRS[%p]: received client load report message '%s'",
|
|
|
|
this, request.DebugString().c_str());
|
|
|
|
GPR_ASSERT(request.cluster_stats().size() == 1);
|
|
|
|
const ClusterStats& cluster_stats = request.cluster_stats()[0];
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// below from firing before its corresponding wait is executed.
|
|
|
|
grpc_core::MutexLock lock(&load_report_mu_);
|
|
|
|
GPR_ASSERT(client_stats_ == nullptr);
|
|
|
|
client_stats_.reset(new ClientStats(cluster_stats));
|
|
|
|
load_report_ready_ = true;
|
|
|
|
load_report_cond_.Signal();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Wait until notified done.
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
lrs_cv_.WaitUntil(&lrs_mu_, [this] { return lrs_done; });
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LRS[%p]: StreamLoadStats done", this);
|
|
|
|
return Status::OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Start() {
|
|
|
|
lrs_done = false;
|
|
|
|
load_report_ready_ = false;
|
|
|
|
client_stats_.reset();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
{
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
NotifyDoneWithLrsCallLocked();
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "LRS[%p]: shut down", this);
|
|
|
|
}
|
|
|
|
|
|
|
|
ClientStats* WaitForLoadReport() {
|
|
|
|
grpc_core::MutexLock lock(&load_report_mu_);
|
|
|
|
load_report_cond_.WaitUntil(&load_report_mu_,
|
|
|
|
[this] { return load_report_ready_; });
|
|
|
|
load_report_ready_ = false;
|
|
|
|
return client_stats_.get();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithLrsCall() {
|
|
|
|
grpc_core::MutexLock lock(&lrs_mu_);
|
|
|
|
NotifyDoneWithLrsCallLocked();
|
|
|
|
}
|
|
|
|
|
|
|
|
void NotifyDoneWithLrsCallLocked() {
|
|
|
|
if (!lrs_done) {
|
|
|
|
lrs_done = true;
|
|
|
|
lrs_cv_.Broadcast();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
const int client_load_reporting_interval_seconds_;
|
|
|
|
|
|
|
|
grpc_core::CondVar lrs_cv_;
|
|
|
|
// Protect lrs_done.
|
|
|
|
grpc_core::Mutex lrs_mu_;
|
|
|
|
bool lrs_done = false;
|
|
|
|
|
|
|
|
grpc_core::CondVar load_report_cond_;
|
|
|
|
// Protect the members below.
|
|
|
|
grpc_core::Mutex load_report_mu_;
|
|
|
|
std::unique_ptr<ClientStats> client_stats_;
|
|
|
|
bool load_report_ready_ = false;
|
|
|
|
};
|
|
|
|
|
|
|
|
class TestType {
|
|
|
|
public:
|
|
|
|
TestType(bool use_xds_resolver, bool enable_load_reporting)
|
|
|
|
: use_xds_resolver_(use_xds_resolver),
|
|
|
|
enable_load_reporting_(enable_load_reporting) {}
|
|
|
|
|
|
|
|
bool use_xds_resolver() const { return use_xds_resolver_; }
|
|
|
|
bool enable_load_reporting() const { return enable_load_reporting_; }
|
|
|
|
|
|
|
|
grpc::string AsString() const {
|
|
|
|
grpc::string retval = (use_xds_resolver_ ? "XdsResolver" : "FakeResolver");
|
|
|
|
if (enable_load_reporting_) retval += "WithLoadReporting";
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
const bool use_xds_resolver_;
|
|
|
|
const bool enable_load_reporting_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class XdsEnd2endTest : public ::testing::TestWithParam<TestType> {
|
|
|
|
protected:
|
|
|
|
XdsEnd2endTest(size_t num_backends, size_t num_balancers,
|
|
|
|
int client_load_reporting_interval_seconds = 100)
|
|
|
|
: server_host_("localhost"),
|
|
|
|
num_backends_(num_backends),
|
|
|
|
num_balancers_(num_balancers),
|
|
|
|
client_load_reporting_interval_seconds_(
|
|
|
|
client_load_reporting_interval_seconds) {}
|
|
|
|
|
|
|
|
static void SetUpTestCase() {
|
|
|
|
// Make the backup poller poll very frequently in order to pick up
|
|
|
|
// updates from all the subchannels's FDs.
|
|
|
|
GPR_GLOBAL_CONFIG_SET(grpc_client_channel_backup_poll_interval_ms, 1);
|
|
|
|
#if TARGET_OS_IPHONE
|
|
|
|
// Workaround Apple CFStream bug
|
|
|
|
gpr_setenv("grpc_cfstream", "0");
|
|
|
|
#endif
|
|
|
|
grpc_init();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void TearDownTestCase() { grpc_shutdown(); }
|
|
|
|
|
|
|
|
void SetUp() override {
|
|
|
|
gpr_setenv("GRPC_XDS_BOOTSTRAP", g_bootstrap_file);
|
|
|
|
g_port_saver->Reset();
|
|
|
|
response_generator_ =
|
|
|
|
grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
|
|
|
|
lb_channel_response_generator_ =
|
|
|
|
grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>();
|
|
|
|
// Start the backends.
|
|
|
|
for (size_t i = 0; i < num_backends_; ++i) {
|
|
|
|
backends_.emplace_back(new BackendServerThread);
|
|
|
|
backends_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
// Start the load balancers.
|
|
|
|
for (size_t i = 0; i < num_balancers_; ++i) {
|
|
|
|
balancers_.emplace_back(
|
|
|
|
new BalancerServerThread(GetParam().enable_load_reporting()
|
|
|
|
? client_load_reporting_interval_seconds_
|
|
|
|
: 0));
|
|
|
|
balancers_.back()->Start(server_host_);
|
|
|
|
}
|
|
|
|
ResetStub();
|
|
|
|
}
|
|
|
|
|
|
|
|
void TearDown() override {
|
|
|
|
ShutdownAllBackends();
|
|
|
|
for (auto& balancer : balancers_) balancer->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Start(server_host_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartBackend(size_t index) { backends_[index]->Start(server_host_); }
|
|
|
|
|
|
|
|
void ShutdownAllBackends() {
|
|
|
|
for (auto& backend : backends_) backend->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
void ShutdownBackend(size_t index) { backends_[index]->Shutdown(); }
|
|
|
|
|
|
|
|
void ResetStub(int fallback_timeout = 0, int failover_timeout = 0,
|
|
|
|
const grpc::string& expected_targets = "",
|
|
|
|
int xds_resource_does_not_exist_timeout = 0) {
|
|
|
|
ChannelArguments args;
|
|
|
|
// TODO(juanlishen): Add setter to ChannelArguments.
|
|
|
|
if (fallback_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_FALLBACK_TIMEOUT_MS, fallback_timeout);
|
|
|
|
}
|
|
|
|
if (failover_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_FAILOVER_TIMEOUT_MS, failover_timeout);
|
|
|
|
}
|
|
|
|
if (xds_resource_does_not_exist_timeout > 0) {
|
|
|
|
args.SetInt(GRPC_ARG_XDS_RESOURCE_DOES_NOT_EXIST_TIMEOUT_MS,
|
|
|
|
xds_resource_does_not_exist_timeout);
|
|
|
|
}
|
|
|
|
// If the parent channel is using the fake resolver, we inject the
|
|
|
|
// response generator for the parent here, and then SetNextResolution()
|
|
|
|
// will inject the xds channel's response generator via the parent's
|
|
|
|
// response generator.
|
|
|
|
//
|
|
|
|
// In contrast, if we are using the xds resolver, then the parent
|
|
|
|
// channel never uses a response generator, and we inject the xds
|
|
|
|
// channel's response generator here.
|
|
|
|
args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR,
|
|
|
|
GetParam().use_xds_resolver()
|
|
|
|
? lb_channel_response_generator_.get()
|
|
|
|
: response_generator_.get());
|
|
|
|
if (!expected_targets.empty()) {
|
|
|
|
args.SetString(GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS, expected_targets);
|
|
|
|
}
|
|
|
|
grpc::string scheme =
|
|
|
|
GetParam().use_xds_resolver() ? "xds-experimental" : "fake";
|
|
|
|
std::ostringstream uri;
|
|
|
|
uri << scheme << ":///" << kApplicationTargetName_;
|
|
|
|
// TODO(dgq): templatize tests to run everything using both secure and
|
|
|
|
// insecure channel credentials.
|
|
|
|
grpc_channel_credentials* channel_creds =
|
|
|
|
grpc_fake_transport_security_credentials_create();
|
|
|
|
grpc_call_credentials* call_creds = grpc_md_only_test_credentials_create(
|
|
|
|
g_kCallCredsMdKey, g_kCallCredsMdValue, false);
|
|
|
|
std::shared_ptr<ChannelCredentials> creds(
|
|
|
|
new SecureChannelCredentials(grpc_composite_channel_credentials_create(
|
|
|
|
channel_creds, call_creds, nullptr)));
|
|
|
|
call_creds->Unref();
|
|
|
|
channel_creds->Unref();
|
|
|
|
channel_ = ::grpc::CreateCustomChannel(uri.str(), creds, args);
|
|
|
|
stub_ = grpc::testing::EchoTestService::NewStub(channel_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ResetBackendCounters() {
|
|
|
|
for (auto& backend : backends_) backend->backend_service()->ResetCounters();
|
|
|
|
}
|
|
|
|
|
|
|
|
bool SeenAllBackends(size_t start_index = 0, size_t stop_index = 0) {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
for (size_t i = start_index; i < stop_index; ++i) {
|
|
|
|
if (backends_[i]->backend_service()->request_count() == 0) return false;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void SendRpcAndCount(int* num_total, int* num_ok, int* num_failure,
|
|
|
|
int* num_drops) {
|
|
|
|
const Status status = SendRpc();
|
|
|
|
if (status.ok()) {
|
|
|
|
++*num_ok;
|
|
|
|
} else {
|
|
|
|
if (status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++*num_drops;
|
|
|
|
} else {
|
|
|
|
++*num_failure;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
++*num_total;
|
|
|
|
}
|
|
|
|
|
|
|
|
std::tuple<int, int, int> WaitForAllBackends(size_t start_index = 0,
|
|
|
|
size_t stop_index = 0,
|
|
|
|
bool reset_counters = true) {
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
int num_total = 0;
|
|
|
|
while (!SeenAllBackends(start_index, stop_index)) {
|
|
|
|
SendRpcAndCount(&num_total, &num_ok, &num_failure, &num_drops);
|
|
|
|
}
|
|
|
|
if (reset_counters) ResetBackendCounters();
|
|
|
|
gpr_log(GPR_INFO,
|
|
|
|
"Performed %d warm up requests against the backends. "
|
|
|
|
"%d succeeded, %d failed, %d dropped.",
|
|
|
|
num_total, num_ok, num_failure, num_drops);
|
|
|
|
return std::make_tuple(num_ok, num_failure, num_drops);
|
|
|
|
}
|
|
|
|
|
|
|
|
void WaitForBackend(size_t backend_idx, bool reset_counters = true) {
|
|
|
|
gpr_log(GPR_INFO, "========= WAITING FOR BACKEND %lu ==========",
|
|
|
|
static_cast<unsigned long>(backend_idx));
|
|
|
|
do {
|
|
|
|
(void)SendRpc();
|
|
|
|
} while (backends_[backend_idx]->backend_service()->request_count() == 0);
|
|
|
|
if (reset_counters) ResetBackendCounters();
|
|
|
|
gpr_log(GPR_INFO, "========= BACKEND %lu READY ==========",
|
|
|
|
static_cast<unsigned long>(backend_idx));
|
|
|
|
}
|
|
|
|
|
|
|
|
grpc_core::ServerAddressList CreateAddressListFromPortList(
|
|
|
|
const std::vector<int>& ports) {
|
|
|
|
grpc_core::ServerAddressList addresses;
|
|
|
|
for (int port : ports) {
|
|
|
|
char* lb_uri_str;
|
|
|
|
gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", port);
|
|
|
|
grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true);
|
|
|
|
GPR_ASSERT(lb_uri != nullptr);
|
|
|
|
grpc_resolved_address address;
|
|
|
|
GPR_ASSERT(grpc_parse_uri(lb_uri, &address));
|
|
|
|
addresses.emplace_back(address.addr, address.len, nullptr);
|
|
|
|
grpc_uri_destroy(lb_uri);
|
|
|
|
gpr_free(lb_uri_str);
|
|
|
|
}
|
|
|
|
return addresses;
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolution(const std::vector<int>& ports,
|
|
|
|
grpc_core::FakeResolverResponseGenerator*
|
|
|
|
lb_channel_response_generator = nullptr) {
|
|
|
|
if (GetParam().use_xds_resolver()) return; // Not used with xds resolver.
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateAddressListFromPortList(ports);
|
|
|
|
grpc_error* error = GRPC_ERROR_NONE;
|
|
|
|
const char* service_config_json =
|
|
|
|
GetParam().enable_load_reporting()
|
|
|
|
? kDefaultServiceConfig_
|
|
|
|
: kDefaultServiceConfigWithoutLoadReporting_;
|
|
|
|
result.service_config =
|
|
|
|
grpc_core::ServiceConfig::Create(service_config_json, &error);
|
|
|
|
GRPC_ERROR_UNREF(error);
|
|
|
|
grpc_arg arg = grpc_core::FakeResolverResponseGenerator::MakeChannelArg(
|
|
|
|
lb_channel_response_generator == nullptr
|
|
|
|
? lb_channel_response_generator_.get()
|
|
|
|
: lb_channel_response_generator);
|
|
|
|
result.args = grpc_channel_args_copy_and_add(nullptr, &arg, 1);
|
|
|
|
response_generator_->SetResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolutionForLbChannelAllBalancers(
|
|
|
|
const char* service_config_json = nullptr,
|
|
|
|
grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator =
|
|
|
|
nullptr) {
|
|
|
|
std::vector<int> ports;
|
|
|
|
for (size_t i = 0; i < balancers_.size(); ++i) {
|
|
|
|
ports.emplace_back(balancers_[i]->port());
|
|
|
|
}
|
|
|
|
SetNextResolutionForLbChannel(ports, service_config_json,
|
|
|
|
lb_channel_response_generator);
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextResolutionForLbChannel(
|
|
|
|
const std::vector<int>& ports, const char* service_config_json = nullptr,
|
|
|
|
grpc_core::FakeResolverResponseGenerator* lb_channel_response_generator =
|
|
|
|
nullptr) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateAddressListFromPortList(ports);
|
|
|
|
if (service_config_json != nullptr) {
|
|
|
|
grpc_error* error = GRPC_ERROR_NONE;
|
|
|
|
result.service_config =
|
|
|
|
grpc_core::ServiceConfig::Create(service_config_json, &error);
|
|
|
|
GRPC_ERROR_UNREF(error);
|
|
|
|
}
|
|
|
|
if (lb_channel_response_generator == nullptr) {
|
|
|
|
lb_channel_response_generator = lb_channel_response_generator_.get();
|
|
|
|
}
|
|
|
|
lb_channel_response_generator->SetResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
void SetNextReresolutionResponse(const std::vector<int>& ports) {
|
|
|
|
grpc_core::ExecCtx exec_ctx;
|
|
|
|
grpc_core::Resolver::Result result;
|
|
|
|
result.addresses = CreateAddressListFromPortList(ports);
|
|
|
|
response_generator_->SetReresolutionResponse(std::move(result));
|
|
|
|
}
|
|
|
|
|
|
|
|
const std::vector<int> GetBackendPorts(size_t start_index = 0,
|
|
|
|
size_t stop_index = 0) const {
|
|
|
|
if (stop_index == 0) stop_index = backends_.size();
|
|
|
|
std::vector<int> backend_ports;
|
|
|
|
for (size_t i = start_index; i < stop_index; ++i) {
|
|
|
|
backend_ports.push_back(backends_[i]->port());
|
|
|
|
}
|
|
|
|
return backend_ports;
|
|
|
|
}
|
|
|
|
|
|
|
|
Status SendRpc(EchoResponse* response = nullptr, int timeout_ms = 1000,
|
|
|
|
bool wait_for_ready = false) {
|
|
|
|
const bool local_response = (response == nullptr);
|
|
|
|
if (local_response) response = new EchoResponse;
|
|
|
|
EchoRequest request;
|
|
|
|
request.set_message(kRequestMessage_);
|
|
|
|
ClientContext context;
|
|
|
|
context.set_deadline(grpc_timeout_milliseconds_to_deadline(timeout_ms));
|
|
|
|
if (wait_for_ready) context.set_wait_for_ready(true);
|
|
|
|
Status status = stub_->Echo(&context, request, response);
|
|
|
|
if (local_response) delete response;
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
void CheckRpcSendOk(const size_t times = 1, const int timeout_ms = 1000,
|
|
|
|
bool wait_for_ready = false) {
|
|
|
|
for (size_t i = 0; i < times; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response, timeout_ms, wait_for_ready);
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void CheckRpcSendFailure() {
|
|
|
|
const Status status = SendRpc();
|
|
|
|
EXPECT_FALSE(status.ok());
|
|
|
|
}
|
|
|
|
|
|
|
|
public:
|
|
|
|
// This method could benefit test subclasses; to make it accessible
|
|
|
|
// via bind with a qualified name, it needs to be public.
|
|
|
|
void SetEdsResourceWithDelay(size_t i,
|
|
|
|
const ClusterLoadAssignment& assignment,
|
|
|
|
int delay_ms, const std::string& name) {
|
|
|
|
GPR_ASSERT(delay_ms > 0);
|
|
|
|
gpr_sleep_until(grpc_timeout_milliseconds_to_deadline(delay_ms));
|
|
|
|
balancers_[i]->ads_service()->SetEdsResource(assignment, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
protected:
|
|
|
|
class ServerThread {
|
|
|
|
public:
|
|
|
|
ServerThread() : port_(g_port_saver->GetPort()) {}
|
|
|
|
virtual ~ServerThread(){};
|
|
|
|
|
|
|
|
void Start(const grpc::string& server_host) {
|
|
|
|
gpr_log(GPR_INFO, "starting %s server on port %d", Type(), port_);
|
|
|
|
GPR_ASSERT(!running_);
|
|
|
|
running_ = true;
|
|
|
|
StartAllServices();
|
|
|
|
grpc_core::Mutex mu;
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// by ServerThread::Serve from firing before the wait below is hit.
|
|
|
|
grpc_core::MutexLock lock(&mu);
|
|
|
|
grpc_core::CondVar cond;
|
|
|
|
thread_.reset(new std::thread(
|
|
|
|
std::bind(&ServerThread::Serve, this, server_host, &mu, &cond)));
|
|
|
|
cond.Wait(&mu);
|
|
|
|
gpr_log(GPR_INFO, "%s server startup complete", Type());
|
|
|
|
}
|
|
|
|
|
|
|
|
void Serve(const grpc::string& server_host, grpc_core::Mutex* mu,
|
|
|
|
grpc_core::CondVar* cond) {
|
|
|
|
// We need to acquire the lock here in order to prevent the notify_one
|
|
|
|
// below from firing before its corresponding wait is executed.
|
|
|
|
grpc_core::MutexLock lock(mu);
|
|
|
|
std::ostringstream server_address;
|
|
|
|
server_address << server_host << ":" << port_;
|
|
|
|
ServerBuilder builder;
|
|
|
|
std::shared_ptr<ServerCredentials> creds(new SecureServerCredentials(
|
|
|
|
grpc_fake_transport_security_server_credentials_create()));
|
|
|
|
builder.AddListeningPort(server_address.str(), creds);
|
|
|
|
RegisterAllServices(&builder);
|
|
|
|
server_ = builder.BuildAndStart();
|
|
|
|
cond->Signal();
|
|
|
|
}
|
|
|
|
|
|
|
|
void Shutdown() {
|
|
|
|
if (!running_) return;
|
|
|
|
gpr_log(GPR_INFO, "%s about to shutdown", Type());
|
|
|
|
ShutdownAllServices();
|
|
|
|
server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0));
|
|
|
|
thread_->join();
|
|
|
|
gpr_log(GPR_INFO, "%s shutdown completed", Type());
|
|
|
|
running_ = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
int port() const { return port_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
virtual void RegisterAllServices(ServerBuilder* builder) = 0;
|
|
|
|
virtual void StartAllServices() = 0;
|
|
|
|
virtual void ShutdownAllServices() = 0;
|
|
|
|
|
|
|
|
virtual const char* Type() = 0;
|
|
|
|
|
|
|
|
const int port_;
|
|
|
|
std::unique_ptr<Server> server_;
|
|
|
|
std::unique_ptr<std::thread> thread_;
|
|
|
|
bool running_ = false;
|
|
|
|
};
|
|
|
|
|
|
|
|
class BackendServerThread : public ServerThread {
|
|
|
|
public:
|
|
|
|
BackendServiceImpl* backend_service() { return &backend_service_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
void RegisterAllServices(ServerBuilder* builder) override {
|
|
|
|
builder->RegisterService(&backend_service_);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllServices() override { backend_service_.Start(); }
|
|
|
|
|
|
|
|
void ShutdownAllServices() override { backend_service_.Shutdown(); }
|
|
|
|
|
|
|
|
const char* Type() override { return "Backend"; }
|
|
|
|
|
|
|
|
BackendServiceImpl backend_service_;
|
|
|
|
};
|
|
|
|
|
|
|
|
class BalancerServerThread : public ServerThread {
|
|
|
|
public:
|
|
|
|
explicit BalancerServerThread(int client_load_reporting_interval = 0)
|
|
|
|
: ads_service_(new AdsServiceImpl(client_load_reporting_interval > 0)),
|
|
|
|
lrs_service_(new LrsServiceImpl(client_load_reporting_interval)) {}
|
|
|
|
|
|
|
|
std::shared_ptr<AdsServiceImpl> ads_service() { return ads_service_; }
|
|
|
|
std::shared_ptr<LrsServiceImpl> lrs_service() { return lrs_service_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
void RegisterAllServices(ServerBuilder* builder) override {
|
|
|
|
builder->RegisterService(ads_service_.get());
|
|
|
|
builder->RegisterService(lrs_service_.get());
|
|
|
|
}
|
|
|
|
|
|
|
|
void StartAllServices() override {
|
|
|
|
ads_service_->Start();
|
|
|
|
lrs_service_->Start();
|
|
|
|
}
|
|
|
|
|
|
|
|
void ShutdownAllServices() override {
|
|
|
|
ads_service_->Shutdown();
|
|
|
|
lrs_service_->Shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
const char* Type() override { return "Balancer"; }
|
|
|
|
|
|
|
|
std::shared_ptr<AdsServiceImpl> ads_service_;
|
|
|
|
std::shared_ptr<LrsServiceImpl> lrs_service_;
|
|
|
|
};
|
|
|
|
|
|
|
|
const grpc::string server_host_;
|
|
|
|
const size_t num_backends_;
|
|
|
|
const size_t num_balancers_;
|
|
|
|
const int client_load_reporting_interval_seconds_;
|
|
|
|
std::shared_ptr<Channel> channel_;
|
|
|
|
std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
|
|
|
|
std::vector<std::unique_ptr<BackendServerThread>> backends_;
|
|
|
|
std::vector<std::unique_ptr<BalancerServerThread>> balancers_;
|
|
|
|
grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
|
|
|
|
response_generator_;
|
|
|
|
grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator>
|
|
|
|
lb_channel_response_generator_;
|
|
|
|
const grpc::string kRequestMessage_ = "Live long and prosper.";
|
|
|
|
const grpc::string kApplicationTargetName_ = kDefaultResourceName;
|
|
|
|
const char* kDefaultServiceConfig_ =
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"xds_experimental\":{\n"
|
|
|
|
" \"lrsLoadReportingServerName\": \"\"\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}";
|
|
|
|
const char* kDefaultServiceConfigWithoutLoadReporting_ =
|
|
|
|
"{\n"
|
|
|
|
" \"loadBalancingConfig\":[\n"
|
|
|
|
" { \"does_not_exist\":{} },\n"
|
|
|
|
" { \"xds_experimental\":{\n"
|
|
|
|
" } }\n"
|
|
|
|
" ]\n"
|
|
|
|
"}";
|
|
|
|
};
|
|
|
|
|
|
|
|
class BasicTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
BasicTest() : XdsEnd2endTest(4, 1) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the balancer sends the correct response to the client, and the
|
|
|
|
// client sends RPCs to the backends using the default child policy.
|
|
|
|
TEST_P(BasicTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// We need to wait for all backends to come online.
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress,
|
|
|
|
backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Check LB policy name for the channel.
|
|
|
|
EXPECT_EQ(
|
|
|
|
(GetParam().use_xds_resolver() ? "cds_experimental" : "xds_experimental"),
|
|
|
|
channel_->GetLoadBalancingPolicyName());
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST_P(BasicTest, IgnoresUnhealthyEndpoints) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0",
|
|
|
|
GetBackendPorts(),
|
|
|
|
kDefaultLocalityWeight,
|
|
|
|
kDefaultLocalityPriority,
|
|
|
|
{envoy::api::v2::HealthStatus::DRAINING}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// We need to wait for all backends to come online.
|
|
|
|
WaitForAllBackends(/*start_index=*/1);
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * (num_backends_ - 1));
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 1; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress,
|
|
|
|
backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that subchannel sharing works when the same backend is listed multiple
|
|
|
|
// times.
|
|
|
|
TEST_P(BasicTest, SameBackendListedMultipleTimes) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Same backend listed twice.
|
|
|
|
std::vector<int> ports(2, backends_[0]->port());
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", ports},
|
|
|
|
});
|
|
|
|
const size_t kNumRpcsPerAddress = 10;
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// We need to wait for the backend to come online.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * ports.size());
|
|
|
|
// Backend should have gotten 20 requests.
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * ports.size(),
|
|
|
|
backends_[0]->backend_service()->request_count());
|
|
|
|
// And they should have come from a single client port, because of
|
|
|
|
// subchannel sharing.
|
|
|
|
EXPECT_EQ(1UL, backends_[0]->backend_service()->clients().size());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs will be blocked until a non-empty serverlist is received.
|
|
|
|
TEST_P(BasicTest, InitiallyEmptyServerlist) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const int kCallDeadlineMs = kServerlistDelayMs * 2;
|
|
|
|
// First response is an empty serverlist, sent right away.
|
|
|
|
AdsServiceImpl::EdsResourceArgs::Locality empty_locality("locality0", {});
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
empty_locality,
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(
|
|
|
|
std::bind(&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kServerlistDelayMs,
|
|
|
|
kDefaultResourceName));
|
|
|
|
const auto t0 = system_clock::now();
|
|
|
|
// Client will block: LB will initially send empty serverlist.
|
|
|
|
CheckRpcSendOk(1, kCallDeadlineMs, true /* wait_for_ready */);
|
|
|
|
const auto ellapsed_ms =
|
|
|
|
std::chrono::duration_cast<std::chrono::milliseconds>(
|
|
|
|
system_clock::now() - t0);
|
|
|
|
// but eventually, the LB sends a serverlist update that allows the call to
|
|
|
|
// proceed. The call delay must be larger than the delay in sending the
|
|
|
|
// populated serverlist but under the call's deadline (which is enforced by
|
|
|
|
// the call's deadline).
|
|
|
|
EXPECT_GT(ellapsed_ms.count(), kServerlistDelayMs);
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs will fail with UNAVAILABLE instead of DEADLINE_EXCEEDED if
|
|
|
|
// all the servers are unreachable.
|
|
|
|
TEST_P(BasicTest, AllServersUnreachableFailFast) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumUnreachableServers = 5;
|
|
|
|
std::vector<int> ports;
|
|
|
|
for (size_t i = 0; i < kNumUnreachableServers; ++i) {
|
|
|
|
ports.push_back(g_port_saver->GetPort());
|
|
|
|
}
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", ports},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
const Status status = SendRpc();
|
|
|
|
// The error shouldn't be DEADLINE_EXCEEDED.
|
|
|
|
EXPECT_EQ(StatusCode::UNAVAILABLE, status.error_code());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs fail when the backends are down, and will succeed again after
|
|
|
|
// the backends are restarted.
|
|
|
|
TEST_P(BasicTest, BackendsRestart) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Stop backends. RPCs should fail.
|
|
|
|
ShutdownAllBackends();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
// Restart all backends. RPCs should start succeeding again.
|
|
|
|
StartAllBackends();
|
|
|
|
CheckRpcSendOk(1 /* times */, 2000 /* timeout_ms */,
|
|
|
|
true /* wait_for_ready */);
|
|
|
|
}
|
|
|
|
|
|
|
|
using SecureNamingTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that secure naming check passes if target name is expected.
|
|
|
|
TEST_P(SecureNamingTest, TargetNameIsExpected) {
|
|
|
|
// TODO(juanlishen): Use separate fake creds for the balancer channel.
|
|
|
|
ResetStub(0, 0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Make sure that trying to connect works without a call.
|
|
|
|
channel_->GetState(true /* try_to_connect */);
|
|
|
|
// We need to wait for all backends to come online.
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress,
|
|
|
|
backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that secure naming check fails if target name is unexpected.
|
|
|
|
TEST_P(SecureNamingTest, TargetNameIsUnexpected) {
|
|
|
|
gpr_setenv("GRPC_XDS_BOOTSTRAP", g_bootstrap_file_bad);
|
|
|
|
::testing::FLAGS_gtest_death_test_style = "threadsafe";
|
|
|
|
// Make sure that we blow up (via abort() from the security connector) when
|
|
|
|
// the name from the balancer doesn't match expectations.
|
|
|
|
ASSERT_DEATH_IF_SUPPORTED(
|
|
|
|
{
|
|
|
|
ResetStub(0, 0, kApplicationTargetName_ + ";lb");
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
channel_->WaitForConnected(grpc_timeout_seconds_to_deadline(1));
|
|
|
|
},
|
|
|
|
"");
|
|
|
|
}
|
|
|
|
|
|
|
|
using LdsTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that LDS client should send an ACK upon correct LDS response (with
|
|
|
|
// inlined RDS result).
|
|
|
|
TEST_P(LdsTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if there is no API listener in the
|
|
|
|
// Listener in the LDS response.
|
|
|
|
TEST_P(LdsTest, NoApiListener) {
|
|
|
|
auto listener = balancers_[0]->ads_service()->default_listener();
|
|
|
|
listener.clear_api_listener();
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if the route_specifier in the
|
|
|
|
// http_connection_manager is neither inlined route_config nor RDS.
|
|
|
|
TEST_P(LdsTest, WrongRouteSpecifier) {
|
|
|
|
auto listener = balancers_[0]->ads_service()->default_listener();
|
|
|
|
HttpConnectionManager http_connection_manager;
|
|
|
|
http_connection_manager.mutable_scoped_routes();
|
|
|
|
listener.mutable_api_listener()->mutable_api_listener()->PackFrom(
|
|
|
|
http_connection_manager);
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(listener, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if matching domain can't be found in
|
|
|
|
// the LDS response.
|
|
|
|
TEST_P(LdsTest, NoMatchedDomain) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)->clear_domains();
|
|
|
|
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should choose the virtual host with matching domain if
|
|
|
|
// multiple virtual hosts exist in the LDS response.
|
|
|
|
TEST_P(LdsTest, ChooseMatchedDomain) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
*(route_config.add_virtual_hosts()) = route_config.virtual_hosts(0);
|
|
|
|
route_config.mutable_virtual_hosts(0)->clear_domains();
|
|
|
|
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should choose the last route in the virtual host if
|
|
|
|
// multiple routes exist in the LDS response.
|
|
|
|
TEST_P(LdsTest, ChooseLastRoute) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
*(route_config.mutable_virtual_hosts(0)->add_routes()) =
|
|
|
|
route_config.virtual_hosts(0).routes(0);
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if route match has non-empty prefix
|
|
|
|
// in the LDS response.
|
|
|
|
TEST_P(LdsTest, RouteMatchHasNonemptyPrefix) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_match()
|
|
|
|
->set_prefix("nonempty_prefix");
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if route has an action other than
|
|
|
|
// RouteAction in the LDS response.
|
|
|
|
TEST_P(LdsTest, RouteHasNoRouteAction) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)->mutable_routes(0)->mutable_redirect();
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client should send a NACK if RouteAction has a
|
|
|
|
// cluster_specifier other than cluster in the LDS response.
|
|
|
|
TEST_P(LdsTest, RouteActionHasNoCluster) {
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetLdsResource(
|
|
|
|
AdsServiceImpl::BuildListener(route_config), kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->lds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that LDS client times out when no response received.
|
|
|
|
TEST_P(LdsTest, Timeout) {
|
|
|
|
ResetStub(0, 0, "", 500);
|
|
|
|
balancers_[0]->ads_service()->SetResourceIgnore(kLdsTypeUrl);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
using RdsTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that RDS client should send an ACK upon correct RDS response.
|
|
|
|
TEST_P(RdsTest, Vanilla) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should send a NACK if matching domain can't be found in
|
|
|
|
// the RDS response.
|
|
|
|
TEST_P(RdsTest, NoMatchedDomain) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)->clear_domains();
|
|
|
|
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should choose the virtual host with matching domain if
|
|
|
|
// multiple virtual hosts exist in the RDS response.
|
|
|
|
TEST_P(RdsTest, ChooseMatchedDomain) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
*(route_config.add_virtual_hosts()) = route_config.virtual_hosts(0);
|
|
|
|
route_config.mutable_virtual_hosts(0)->clear_domains();
|
|
|
|
route_config.mutable_virtual_hosts(0)->add_domains("unmatched_domain");
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should choose the last route in the virtual host if
|
|
|
|
// multiple routes exist in the RDS response.
|
|
|
|
TEST_P(RdsTest, ChooseLastRoute) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
*(route_config.mutable_virtual_hosts(0)->add_routes()) =
|
|
|
|
route_config.virtual_hosts(0).routes(0);
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should send a NACK if route match has non-empty prefix
|
|
|
|
// in the RDS response.
|
|
|
|
TEST_P(RdsTest, RouteMatchHasNonemptyPrefix) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_match()
|
|
|
|
->set_prefix("nonempty_prefix");
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should send a NACK if route has an action other than
|
|
|
|
// RouteAction in the RDS response.
|
|
|
|
TEST_P(RdsTest, RouteHasNoRouteAction) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)->mutable_routes(0)->mutable_redirect();
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client should send a NACK if RouteAction has a
|
|
|
|
// cluster_specifier other than cluster in the RDS response.
|
|
|
|
TEST_P(RdsTest, RouteActionHasNoCluster) {
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
RouteConfiguration route_config =
|
|
|
|
balancers_[0]->ads_service()->default_route_config();
|
|
|
|
route_config.mutable_virtual_hosts(0)
|
|
|
|
->mutable_routes(0)
|
|
|
|
->mutable_route()
|
|
|
|
->mutable_cluster_header();
|
|
|
|
balancers_[0]->ads_service()->SetRdsResource(route_config,
|
|
|
|
kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->rds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RDS client times out when no response received.
|
|
|
|
TEST_P(RdsTest, Timeout) {
|
|
|
|
ResetStub(0, 0, "", 500);
|
|
|
|
balancers_[0]->ads_service()->SetResourceIgnore(kRdsTypeUrl);
|
|
|
|
balancers_[0]->ads_service()->SetLdsToUseDynamicRds();
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
using CdsTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that CDS client should send an ACK upon correct CDS response.
|
|
|
|
TEST_P(CdsTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
(void)SendRpc();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
|
|
|
|
AdsServiceImpl::ACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that CDS client should send a NACK if the cluster type in CDS response
|
|
|
|
// is other than EDS.
|
|
|
|
TEST_P(CdsTest, WrongClusterType) {
|
|
|
|
auto cluster = balancers_[0]->ads_service()->default_cluster();
|
|
|
|
cluster.set_type(envoy::api::v2::Cluster::STATIC);
|
|
|
|
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that CDS client should send a NACK if the eds_config in CDS response is
|
|
|
|
// other than ADS.
|
|
|
|
TEST_P(CdsTest, WrongEdsConfig) {
|
|
|
|
auto cluster = balancers_[0]->ads_service()->default_cluster();
|
|
|
|
cluster.mutable_eds_cluster_config()->mutable_eds_config()->mutable_self();
|
|
|
|
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that CDS client should send a NACK if the lb_policy in CDS response is
|
|
|
|
// other than ROUND_ROBIN.
|
|
|
|
TEST_P(CdsTest, WrongLbPolicy) {
|
|
|
|
auto cluster = balancers_[0]->ads_service()->default_cluster();
|
|
|
|
cluster.set_lb_policy(envoy::api::v2::Cluster::LEAST_REQUEST);
|
|
|
|
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that CDS client should send a NACK if the lrs_server in CDS response is
|
|
|
|
// other than SELF.
|
|
|
|
TEST_P(CdsTest, WrongLrsServer) {
|
|
|
|
auto cluster = balancers_[0]->ads_service()->default_cluster();
|
|
|
|
cluster.mutable_lrs_server()->mutable_ads();
|
|
|
|
balancers_[0]->ads_service()->SetCdsResource(cluster, kDefaultResourceName);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->cds_response_state(),
|
|
|
|
AdsServiceImpl::NACKED);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that CDS client times out when no response received.
|
|
|
|
TEST_P(CdsTest, Timeout) {
|
|
|
|
ResetStub(0, 0, "", 500);
|
|
|
|
balancers_[0]->ads_service()->SetResourceIgnore(kCdsTypeUrl);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
using EdsTest = BasicTest;
|
|
|
|
|
|
|
|
// TODO(roth): Add tests showing that RPCs fail when EDS data is invalid.
|
|
|
|
|
|
|
|
TEST_P(EdsTest, Timeout) {
|
|
|
|
ResetStub(0, 0, "", 500);
|
|
|
|
balancers_[0]->ads_service()->SetResourceIgnore(kEdsTypeUrl);
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
using LocalityMapTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that the localities in a locality map are picked according to their
|
|
|
|
// weights.
|
|
|
|
TEST_P(LocalityMapTest, WeightedRoundRobin) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const int kLocalityWeight0 = 2;
|
|
|
|
const int kLocalityWeight1 = 8;
|
|
|
|
const int kTotalLocalityWeight = kLocalityWeight0 + kLocalityWeight1;
|
|
|
|
const double kLocalityWeightRate0 =
|
|
|
|
static_cast<double>(kLocalityWeight0) / kTotalLocalityWeight;
|
|
|
|
const double kLocalityWeightRate1 =
|
|
|
|
static_cast<double>(kLocalityWeight1) / kTotalLocalityWeight;
|
|
|
|
// ADS response contains 2 localities, each of which contains 1 backend.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kLocalityWeight0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kLocalityWeight1},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait for both backends to be ready.
|
|
|
|
WaitForAllBackends(0, 2);
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
// The locality picking rates should be roughly equal to the expectation.
|
|
|
|
const double locality_picked_rate_0 =
|
|
|
|
static_cast<double>(backends_[0]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs;
|
|
|
|
const double locality_picked_rate_1 =
|
|
|
|
static_cast<double>(backends_[1]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(locality_picked_rate_0,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(kLocalityWeightRate0 * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kLocalityWeightRate0 * (1 + kErrorTolerance))));
|
|
|
|
EXPECT_THAT(locality_picked_rate_1,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(kLocalityWeightRate1 * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kLocalityWeightRate1 * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the locality map can work properly even when it contains a large
|
|
|
|
// number of localities.
|
|
|
|
TEST_P(LocalityMapTest, StressTest) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumLocalities = 100;
|
|
|
|
// The first ADS response contains kNumLocalities localities, each of which
|
|
|
|
// contains backend 0.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args;
|
|
|
|
for (size_t i = 0; i < kNumLocalities; ++i) {
|
|
|
|
std::string name = absl::StrCat("locality", i);
|
|
|
|
AdsServiceImpl::EdsResourceArgs::Locality locality(name,
|
|
|
|
{backends_[0]->port()});
|
|
|
|
args.locality_list.emplace_back(std::move(locality));
|
|
|
|
}
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// The second ADS response contains 1 locality, which contains backend 1.
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts(1, 2)},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(std::bind(
|
|
|
|
&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), 60 * 1000, kDefaultResourceName));
|
|
|
|
// Wait until backend 0 is ready, before which kNumLocalities localities are
|
|
|
|
// received and handled by the xds policy.
|
|
|
|
WaitForBackend(0, /*reset_counters=*/false);
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
// Wait until backend 1 is ready, before which kNumLocalities localities are
|
|
|
|
// removed by the xds policy.
|
|
|
|
WaitForBackend(1);
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the localities in a locality map are picked correctly after update
|
|
|
|
// (addition, modification, deletion).
|
|
|
|
TEST_P(LocalityMapTest, UpdateMap) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 1000;
|
|
|
|
// The locality weight for the first 3 localities.
|
|
|
|
const std::vector<int> kLocalityWeights0 = {2, 3, 4};
|
|
|
|
const double kTotalLocalityWeight0 =
|
|
|
|
std::accumulate(kLocalityWeights0.begin(), kLocalityWeights0.end(), 0);
|
|
|
|
std::vector<double> locality_weight_rate_0;
|
|
|
|
for (int weight : kLocalityWeights0) {
|
|
|
|
locality_weight_rate_0.push_back(weight / kTotalLocalityWeight0);
|
|
|
|
}
|
|
|
|
// Delete the first locality, keep the second locality, change the third
|
|
|
|
// locality's weight from 4 to 2, and add a new locality with weight 6.
|
|
|
|
const std::vector<int> kLocalityWeights1 = {3, 2, 6};
|
|
|
|
const double kTotalLocalityWeight1 =
|
|
|
|
std::accumulate(kLocalityWeights1.begin(), kLocalityWeights1.end(), 0);
|
|
|
|
std::vector<double> locality_weight_rate_1 = {
|
|
|
|
0 /* placeholder for locality 0 */};
|
|
|
|
for (int weight : kLocalityWeights1) {
|
|
|
|
locality_weight_rate_1.push_back(weight / kTotalLocalityWeight1);
|
|
|
|
}
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), 2},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), 3},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), 4},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality1", GetBackendPorts(1, 2), 3},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), 2},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), 6},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(std::bind(
|
|
|
|
&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), 5000, kDefaultResourceName));
|
|
|
|
// Wait for the first 3 backends to be ready.
|
|
|
|
WaitForAllBackends(0, 3);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// The picking rates of the first 3 backends should be roughly equal to the
|
|
|
|
// expectation.
|
|
|
|
std::vector<double> locality_picked_rates;
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
locality_picked_rates.push_back(
|
|
|
|
static_cast<double>(backends_[i]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs);
|
|
|
|
}
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_THAT(
|
|
|
|
locality_picked_rates[i],
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(locality_weight_rate_0[i] * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(locality_weight_rate_0[i] * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
// Backend 3 hasn't received any request.
|
|
|
|
EXPECT_EQ(0U, backends_[3]->backend_service()->request_count());
|
|
|
|
// Wait until the locality update has been processed, as signaled by backend 3
|
|
|
|
// receiving a request.
|
|
|
|
WaitForBackend(3);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
// Send kNumRpcs RPCs.
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// Backend 0 no longer receives any request.
|
|
|
|
EXPECT_EQ(0U, backends_[0]->backend_service()->request_count());
|
|
|
|
// The picking rates of the last 3 backends should be roughly equal to the
|
|
|
|
// expectation.
|
|
|
|
locality_picked_rates = {0 /* placeholder for backend 0 */};
|
|
|
|
for (size_t i = 1; i < 4; ++i) {
|
|
|
|
locality_picked_rates.push_back(
|
|
|
|
static_cast<double>(backends_[i]->backend_service()->request_count()) /
|
|
|
|
kNumRpcs);
|
|
|
|
}
|
|
|
|
for (size_t i = 1; i < 4; ++i) {
|
|
|
|
EXPECT_THAT(
|
|
|
|
locality_picked_rates[i],
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(locality_weight_rate_1[i] * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(locality_weight_rate_1[i] * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
class FailoverTest : public BasicTest {
|
|
|
|
public:
|
|
|
|
void SetUp() override {
|
|
|
|
BasicTest::SetUp();
|
|
|
|
ResetStub(0, 100, "");
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Localities with the highest priority are used when multiple priority exist.
|
|
|
|
TEST_P(FailoverTest, ChooseHighestPriority) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForBackend(3, false);
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// If the higher priority localities are not reachable, failover to the highest
|
|
|
|
// priority among the rest.
|
|
|
|
TEST_P(FailoverTest, Failover) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ShutdownBackend(3);
|
|
|
|
ShutdownBackend(0);
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForBackend(1, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 1) continue;
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// If a locality with higher priority than the current one becomes ready,
|
|
|
|
// switch to it.
|
|
|
|
TEST_P(FailoverTest, SwitchBackToHigherPriority) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 100;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
ShutdownBackend(3);
|
|
|
|
ShutdownBackend(0);
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForBackend(1, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 1) continue;
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
StartBackend(0);
|
|
|
|
WaitForBackend(0);
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
EXPECT_EQ(kNumRpcs, backends_[0]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// The first update only contains unavailable priorities. The second update
|
|
|
|
// contains available priorities.
|
|
|
|
TEST_P(FailoverTest, UpdateInitialUnavailable) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 1},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 3},
|
|
|
|
});
|
|
|
|
ShutdownBackend(0);
|
|
|
|
ShutdownBackend(1);
|
|
|
|
std::thread delayed_resource_setter(std::bind(
|
|
|
|
&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
|
|
|
|
gpr_timespec deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(500, GPR_TIMESPAN));
|
|
|
|
// Send 0.5 second worth of RPCs.
|
|
|
|
do {
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
WaitForBackend(2, false);
|
|
|
|
for (size_t i = 0; i < 4; ++i) {
|
|
|
|
if (i == 2) continue;
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that after the localities' priorities are updated, we still choose the
|
|
|
|
// highest READY priority with the updated localities.
|
|
|
|
TEST_P(FailoverTest, UpdatePriority) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 100;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 3},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 2},
|
|
|
|
{"locality1", GetBackendPorts(1, 2), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality2", GetBackendPorts(2, 3), kDefaultLocalityWeight, 1},
|
|
|
|
{"locality3", GetBackendPorts(3, 4), kDefaultLocalityWeight, 3},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(std::bind(
|
|
|
|
&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
|
|
|
|
WaitForBackend(3, false);
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
WaitForBackend(1);
|
|
|
|
CheckRpcSendOk(kNumRpcs);
|
|
|
|
EXPECT_EQ(kNumRpcs, backends_[1]->backend_service()->request_count());
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Moves all localities in the current priority to a higher priority.
|
|
|
|
TEST_P(FailoverTest, MoveAllLocalitiesInCurrentPriorityToHigherPriority) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// First update:
|
|
|
|
// - Priority 0 is locality 0, containing backend 0, which is down.
|
|
|
|
// - Priority 1 is locality 1, containing backends 1 and 2, which are up.
|
|
|
|
ShutdownBackend(0);
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 3), kDefaultLocalityWeight, 1},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Second update:
|
|
|
|
// - Priority 0 contains both localities 0 and 1.
|
|
|
|
// - Priority 1 is not present.
|
|
|
|
// - We add backend 3 to locality 1, just so we have a way to know
|
|
|
|
// when the update has been seen by the client.
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts(0, 1), kDefaultLocalityWeight, 0},
|
|
|
|
{"locality1", GetBackendPorts(1, 4), kDefaultLocalityWeight, 0},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(std::bind(
|
|
|
|
&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), 1000, kDefaultResourceName));
|
|
|
|
// When we get the first update, all backends in priority 0 are down,
|
|
|
|
// so we will create priority 1. Backends 1 and 2 should have traffic,
|
|
|
|
// but backend 3 should not.
|
|
|
|
WaitForAllBackends(1, 3, false);
|
|
|
|
EXPECT_EQ(0UL, backends_[3]->backend_service()->request_count());
|
|
|
|
// When backend 3 gets traffic, we know the second update has been seen.
|
|
|
|
WaitForBackend(3);
|
|
|
|
// The ADS service of balancer 0 got at least 1 response.
|
|
|
|
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
using DropTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that RPCs are dropped according to the drop config.
|
|
|
|
TEST_P(DropTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The ADS response contains two drop categories.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop config is converted correctly from per hundred.
|
|
|
|
TEST_P(DropTest, DropPerHundred) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerHundredForLb = 10;
|
|
|
|
const double kDropRateForLb = kDropPerHundredForLb / 100.0;
|
|
|
|
// The ADS response contains one drop category.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerHundredForLb}};
|
|
|
|
args.drop_denominator = FractionalPercent::HUNDRED;
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop config is converted correctly from per ten thousand.
|
|
|
|
TEST_P(DropTest, DropPerTenThousand) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 5000;
|
|
|
|
const uint32_t kDropPerTenThousandForLb = 1000;
|
|
|
|
const double kDropRateForLb = kDropPerTenThousandForLb / 10000.0;
|
|
|
|
// The ADS response contains one drop category.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerTenThousandForLb}};
|
|
|
|
args.drop_denominator = FractionalPercent::TEN_THOUSAND;
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that drop is working correctly after update.
|
|
|
|
TEST_P(DropTest, Update) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 1000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The first ADS response contains one drop category.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
WaitForAllBackends();
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
size_t num_drops = 0;
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.3;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(::testing::Ge(kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
// The second ADS response contains two drop categories, send an update EDS
|
|
|
|
// response.
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait until the drop rate increases to the middle of the two configs, which
|
|
|
|
// implies that the update has been in effect.
|
|
|
|
const double kDropRateThreshold =
|
|
|
|
(kDropRateForLb + KDropRateForLbAndThrottle) / 2;
|
|
|
|
size_t num_rpcs = kNumRpcs;
|
|
|
|
while (seen_drop_rate < kDropRateThreshold) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
++num_rpcs;
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
seen_drop_rate = static_cast<double>(num_drops) / num_rpcs;
|
|
|
|
}
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
num_drops = 0;
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// The new drop rate should be roughly equal to the expectation.
|
|
|
|
seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that all the RPCs are dropped if any drop category drops 100%.
|
|
|
|
TEST_P(DropTest, DropAll) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 1000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 1000000;
|
|
|
|
// The ADS response contains two drop categories.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Send kNumRpcs RPCs and all of them are dropped.
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
EXPECT_TRUE(!status.ok() && status.error_message() ==
|
|
|
|
"Call dropped by load balancing policy");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
using FallbackTest = BasicTest;
|
|
|
|
|
|
|
|
// Tests that RPCs are handled by the fallback backends before the serverlist is
|
|
|
|
// received, but will be handled by the serverlist after it's received.
|
|
|
|
TEST_P(FallbackTest, Vanilla) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const size_t kNumBackendsInResolution = backends_.size() / 2;
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution(GetBackendPorts(0, kNumBackendsInResolution));
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsInResolution)},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(
|
|
|
|
std::bind(&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kServerlistDelayMs,
|
|
|
|
kDefaultResourceName));
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
WaitForAllBackends(0 /* start_index */,
|
|
|
|
kNumBackendsInResolution /* stop_index */);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// Fallback is used: each backend returned by the resolver should have
|
|
|
|
// gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
WaitForAllBackends(kNumBackendsInResolution /* start_index */);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(backends_.size() - kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// Serverlist is used: each backend returned by the balancer should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that RPCs are handled by the updated fallback backends before
|
|
|
|
// serverlist is received,
|
|
|
|
TEST_P(FallbackTest, Update) {
|
|
|
|
const int kFallbackTimeoutMs = 200 * grpc_test_slowdown_factor();
|
|
|
|
const int kServerlistDelayMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
const size_t kNumBackendsInResolution = backends_.size() / 3;
|
|
|
|
const size_t kNumBackendsInResolutionUpdate = backends_.size() / 3;
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution(GetBackendPorts(0, kNumBackendsInResolution));
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send non-empty serverlist only after kServerlistDelayMs.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate)},
|
|
|
|
});
|
|
|
|
std::thread delayed_resource_setter(
|
|
|
|
std::bind(&BasicTest::SetEdsResourceWithDelay, this, 0,
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kServerlistDelayMs,
|
|
|
|
kDefaultResourceName));
|
|
|
|
// Wait until all the fallback backends are reachable.
|
|
|
|
WaitForAllBackends(0 /* start_index */,
|
|
|
|
kNumBackendsInResolution /* stop_index */);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolution);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// Fallback is used: each backend returned by the resolver should have
|
|
|
|
// gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
SetNextResolution(GetBackendPorts(
|
|
|
|
kNumBackendsInResolution,
|
|
|
|
kNumBackendsInResolution + kNumBackendsInResolutionUpdate));
|
|
|
|
// Wait until the resolution update has been processed and all the new
|
|
|
|
// fallback backends are reachable.
|
|
|
|
WaitForAllBackends(kNumBackendsInResolution /* start_index */,
|
|
|
|
kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* stop_index */);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(kNumBackendsInResolutionUpdate);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// The resolution update is used: each backend in the resolution update should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0; i < kNumBackendsInResolution; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// Wait until the serverlist reception has been processed and all backends
|
|
|
|
// in the serverlist are reachable.
|
|
|
|
WaitForAllBackends(kNumBackendsInResolution +
|
|
|
|
kNumBackendsInResolutionUpdate /* start_index */);
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE THIRD BATCH ==========");
|
|
|
|
CheckRpcSendOk(backends_.size() - kNumBackendsInResolution -
|
|
|
|
kNumBackendsInResolutionUpdate);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH THIRD BATCH ==========");
|
|
|
|
// Serverlist is used: each backend returned by the balancer should
|
|
|
|
// have gotten one request.
|
|
|
|
for (size_t i = 0;
|
|
|
|
i < kNumBackendsInResolution + kNumBackendsInResolutionUpdate; ++i) {
|
|
|
|
EXPECT_EQ(0U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
for (size_t i = kNumBackendsInResolution + kNumBackendsInResolutionUpdate;
|
|
|
|
i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(1U, backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
delayed_resource_setter.join();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback will kick in immediately if the balancer channel fails.
|
|
|
|
TEST_P(FallbackTest, FallbackEarlyWhenBalancerChannelFails) {
|
|
|
|
const int kFallbackTimeoutMs = 10000 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()});
|
|
|
|
SetNextResolutionForLbChannel({g_port_saver->GetPort()});
|
|
|
|
// Send RPC with deadline less than the fallback timeout and make sure it
|
|
|
|
// succeeds.
|
|
|
|
CheckRpcSendOk(/* times */ 1, /* timeout_ms */ 1000,
|
|
|
|
/* wait_for_ready */ false);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback will kick in immediately if the balancer call fails.
|
|
|
|
TEST_P(FallbackTest, FallbackEarlyWhenBalancerCallFails) {
|
|
|
|
const int kFallbackTimeoutMs = 10000 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
// Return one balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Balancer drops call without sending a serverlist.
|
|
|
|
balancers_[0]->ads_service()->NotifyDoneWithAdsCall();
|
|
|
|
// Send RPC with deadline less than the fallback timeout and make sure it
|
|
|
|
// succeeds.
|
|
|
|
CheckRpcSendOk(/* times */ 1, /* timeout_ms */ 1000,
|
|
|
|
/* wait_for_ready */ false);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is entered if balancer response is received but the
|
|
|
|
// backends can't be reached.
|
|
|
|
TEST_P(FallbackTest, FallbackIfResponseReceivedButChildNotReady) {
|
|
|
|
const int kFallbackTimeoutMs = 500 * grpc_test_slowdown_factor();
|
|
|
|
ResetStub(kFallbackTimeoutMs);
|
|
|
|
SetNextResolution({backends_[0]->port()});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send a serverlist that only contains an unreachable backend before fallback
|
|
|
|
// timeout.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", {g_port_saver->GetPort()}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Because no child policy is ready before fallback timeout, we enter fallback
|
|
|
|
// mode.
|
|
|
|
WaitForBackend(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is exited if the balancer tells the client to drop
|
|
|
|
// all the calls.
|
|
|
|
TEST_P(FallbackTest, FallbackModeIsExitedWhenBalancerSaysToDropAllCalls) {
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()});
|
|
|
|
SetNextResolutionForLbChannel({g_port_saver->GetPort()});
|
|
|
|
// Enter fallback mode because the LB channel fails to connect.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Return a new balancer that sends a response to drop all calls.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, 1000000}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// Send RPCs until failure.
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(5000, GPR_TIMESPAN));
|
|
|
|
do {
|
|
|
|
auto status = SendRpc();
|
|
|
|
if (!status.ok()) break;
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
CheckRpcSendFailure();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that fallback mode is exited if the child policy becomes ready.
|
|
|
|
TEST_P(FallbackTest, FallbackModeIsExitedAfterChildRready) {
|
|
|
|
// Return an unreachable balancer and one fallback backend.
|
|
|
|
SetNextResolution({backends_[0]->port()});
|
|
|
|
SetNextResolutionForLbChannel({g_port_saver->GetPort()});
|
|
|
|
// Enter fallback mode because the LB channel fails to connect.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Return a new balancer that sends a dead backend.
|
|
|
|
ShutdownBackend(1);
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
// The state (TRANSIENT_FAILURE) update from the child policy will be ignored
|
|
|
|
// because we are still in fallback mode.
|
|
|
|
gpr_timespec deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(500, GPR_TIMESPAN));
|
|
|
|
// Send 0.5 second worth of RPCs.
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// After the backend is restarted, the child policy will eventually be READY,
|
|
|
|
// and we will exit fallback mode.
|
|
|
|
StartBackend(1);
|
|
|
|
WaitForBackend(1);
|
|
|
|
// We have exited fallback mode, so calls will go to the child policy
|
|
|
|
// exclusively.
|
|
|
|
CheckRpcSendOk(100);
|
|
|
|
EXPECT_EQ(0U, backends_[0]->backend_service()->request_count());
|
|
|
|
EXPECT_EQ(100U, backends_[1]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
class BalancerUpdateTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
BalancerUpdateTest() : XdsEnd2endTest(4, 3) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the old LB call is still used after the balancer address update as
|
|
|
|
// long as that call is still alive.
|
|
|
|
TEST_P(BalancerUpdateTest, UpdateBalancersButKeepUsingOriginalBalancer) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[1]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait until the first backend is ready.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Send 10 requests.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->backend_service()->request_count());
|
|
|
|
// The ADS service of balancer 0 sent at least 1 response.
|
|
|
|
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel({balancers_[1]->port()});
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// The current LB call is still working, so xds continued using it to the
|
|
|
|
// first balancer, which doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
// The ADS service of balancer 0 sent at least 1 response.
|
|
|
|
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that the old LB call is still used after multiple balancer address
|
|
|
|
// updates as long as that call is still alive. Send an update with the same set
|
|
|
|
// of LBs as the one in SetUp() in order to verify that the LB channel inside
|
|
|
|
// xds keeps the initial connection (which by definition is also present in the
|
|
|
|
// update).
|
|
|
|
TEST_P(BalancerUpdateTest, Repeated) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[1]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait until the first backend is ready.
|
|
|
|
WaitForBackend(0);
|
|
|
|
// Send 10 requests.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->backend_service()->request_count());
|
|
|
|
// The ADS service of balancer 0 sent at least 1 response.
|
|
|
|
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
std::vector<int> ports;
|
|
|
|
ports.emplace_back(balancers_[0]->port());
|
|
|
|
ports.emplace_back(balancers_[1]->port());
|
|
|
|
ports.emplace_back(balancers_[2]->port());
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel(ports);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
gpr_timespec deadline = gpr_time_add(
|
|
|
|
gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// xds continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
ports.clear();
|
|
|
|
ports.emplace_back(balancers_[0]->port());
|
|
|
|
ports.emplace_back(balancers_[1]->port());
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 2 ==========");
|
|
|
|
SetNextResolutionForLbChannel(ports);
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 2 DONE ==========");
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
deadline = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
|
|
|
|
gpr_time_from_millis(10000, GPR_TIMESPAN));
|
|
|
|
// Send 10 seconds worth of RPCs
|
|
|
|
do {
|
|
|
|
CheckRpcSendOk();
|
|
|
|
} while (gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), deadline) < 0);
|
|
|
|
// xds continued using the original LB call to the first balancer, which
|
|
|
|
// doesn't assign the second backend.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that if the balancer is down, the RPCs will still be sent to the
|
|
|
|
// backends according to the last balancer response, until a new balancer is
|
|
|
|
// reachable.
|
|
|
|
TEST_P(BalancerUpdateTest, DeadUpdate) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", {backends_[0]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", {backends_[1]->port()}},
|
|
|
|
});
|
|
|
|
balancers_[1]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Start servers and send 10 RPCs per server.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE FIRST BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH FIRST BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the first backend.
|
|
|
|
EXPECT_EQ(10U, backends_[0]->backend_service()->request_count());
|
|
|
|
// The ADS service of balancer 0 sent at least 1 response.
|
|
|
|
EXPECT_GT(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
// Kill balancer 0
|
|
|
|
gpr_log(GPR_INFO, "********** ABOUT TO KILL BALANCER 0 *************");
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
gpr_log(GPR_INFO, "********** KILLED BALANCER 0 *************");
|
|
|
|
// This is serviced by the existing child policy.
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE SECOND BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH SECOND BATCH ==========");
|
|
|
|
// All 10 requests should again have gone to the first backend.
|
|
|
|
EXPECT_EQ(20U, backends_[0]->backend_service()->request_count());
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
// The ADS service of no balancers sent anything
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
gpr_log(GPR_INFO, "========= ABOUT TO UPDATE 1 ==========");
|
|
|
|
SetNextResolutionForLbChannel({balancers_[1]->port()});
|
|
|
|
gpr_log(GPR_INFO, "========= UPDATE 1 DONE ==========");
|
|
|
|
// Wait until update has been processed, as signaled by the second backend
|
|
|
|
// receiving a request. In the meantime, the client continues to be serviced
|
|
|
|
// (by the first backend) without interruption.
|
|
|
|
EXPECT_EQ(0U, backends_[1]->backend_service()->request_count());
|
|
|
|
WaitForBackend(1);
|
|
|
|
// This is serviced by the updated RR policy
|
|
|
|
backends_[1]->backend_service()->ResetCounters();
|
|
|
|
gpr_log(GPR_INFO, "========= BEFORE THIRD BATCH ==========");
|
|
|
|
CheckRpcSendOk(10);
|
|
|
|
gpr_log(GPR_INFO, "========= DONE WITH THIRD BATCH ==========");
|
|
|
|
// All 10 requests should have gone to the second backend.
|
|
|
|
EXPECT_EQ(10U, backends_[1]->backend_service()->request_count());
|
|
|
|
// The ADS service of balancer 1 sent at least 1 response.
|
|
|
|
EXPECT_EQ(balancers_[0]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_GT(balancers_[1]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
EXPECT_EQ(balancers_[2]->ads_service()->eds_response_state(),
|
|
|
|
AdsServiceImpl::NOT_SENT);
|
|
|
|
}
|
|
|
|
|
|
|
|
// The re-resolution tests are deferred because they rely on the fallback mode,
|
|
|
|
// which hasn't been supported.
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_P(BalancerUpdateTest, ReresolveDeadBackend).
|
|
|
|
|
|
|
|
// TODO(juanlishen): Add TEST_P(UpdatesWithClientLoadReportingTest,
|
|
|
|
// ReresolveDeadBalancer)
|
|
|
|
|
|
|
|
class ClientLoadReportingTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
ClientLoadReportingTest() : XdsEnd2endTest(4, 1, 3) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the load report received at the balancer is correct.
|
|
|
|
TEST_P(ClientLoadReportingTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumRpcsPerAddress = 100;
|
|
|
|
// TODO(juanlishen): Partition the backends after multiple localities is
|
|
|
|
// tested.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait until all backends are ready.
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends();
|
|
|
|
// Send kNumRpcsPerAddress RPCs per server.
|
|
|
|
CheckRpcSendOk(kNumRpcsPerAddress * num_backends_);
|
|
|
|
// Each backend should have gotten 100 requests.
|
|
|
|
for (size_t i = 0; i < backends_.size(); ++i) {
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress,
|
|
|
|
backends_[i]->backend_service()->request_count());
|
|
|
|
}
|
|
|
|
// The LRS service got a single request, and sent a single response.
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->lrs_service()->request_count());
|
|
|
|
EXPECT_EQ(1U, balancers_[0]->lrs_service()->response_count());
|
|
|
|
// The load report received at the balancer should be correct.
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(kNumRpcsPerAddress * num_backends_ + num_ok,
|
|
|
|
client_stats->total_issued_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Tests that if the balancer restarts, the client load report contains the
|
|
|
|
// stats before and after the restart correctly.
|
|
|
|
TEST_P(ClientLoadReportingTest, BalancerRestart) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannel({balancers_[0]->port()});
|
|
|
|
const size_t kNumBackendsFirstPass = backends_.size() / 2;
|
|
|
|
const size_t kNumBackendsSecondPass =
|
|
|
|
backends_.size() - kNumBackendsFirstPass;
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts(0, kNumBackendsFirstPass)},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait until all backends returned by the balancer are ready.
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) =
|
|
|
|
WaitForAllBackends(/* start_index */ 0,
|
|
|
|
/* stop_index */ kNumBackendsFirstPass);
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(static_cast<size_t>(num_ok),
|
|
|
|
client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
// Shut down the balancer.
|
|
|
|
balancers_[0]->Shutdown();
|
|
|
|
// We should continue using the last EDS response we received from the
|
|
|
|
// balancer before it was shut down.
|
|
|
|
// Note: We need to use WaitForAllBackends() here instead of just
|
|
|
|
// CheckRpcSendOk(kNumBackendsFirstPass), because when the balancer
|
|
|
|
// shuts down, the XdsClient will generate an error to the
|
|
|
|
// ServiceConfigWatcher, which will cause the xds resolver to send a
|
|
|
|
// no-op update to the LB policy. When this update gets down to the
|
|
|
|
// round_robin child policy for the locality, it will generate a new
|
|
|
|
// subchannel list, which resets the start index randomly. So we need
|
|
|
|
// to be a little more permissive here to avoid spurious failures.
|
|
|
|
ResetBackendCounters();
|
|
|
|
int num_started = std::get<0>(WaitForAllBackends(
|
|
|
|
/* start_index */ 0, /* stop_index */ kNumBackendsFirstPass));
|
|
|
|
// Now restart the balancer, this time pointing to the new backends.
|
|
|
|
balancers_[0]->Start(server_host_);
|
|
|
|
args = AdsServiceImpl::EdsResourceArgs({
|
|
|
|
{"locality0", GetBackendPorts(kNumBackendsFirstPass)},
|
|
|
|
});
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
// Wait for queries to start going to one of the new backends.
|
|
|
|
// This tells us that we're now using the new serverlist.
|
|
|
|
std::tie(num_ok, num_failure, num_drops) =
|
|
|
|
WaitForAllBackends(/* start_index */ kNumBackendsFirstPass);
|
|
|
|
num_started += num_ok + num_failure + num_drops;
|
|
|
|
// Send one RPC per backend.
|
|
|
|
CheckRpcSendOk(kNumBackendsSecondPass);
|
|
|
|
num_started += kNumBackendsSecondPass;
|
|
|
|
// Check client stats.
|
|
|
|
client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(num_started, client_stats->total_successful_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_requests_in_progress());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_error_requests());
|
|
|
|
EXPECT_EQ(0U, client_stats->total_dropped_requests());
|
|
|
|
}
|
|
|
|
|
|
|
|
class ClientLoadReportingWithDropTest : public XdsEnd2endTest {
|
|
|
|
public:
|
|
|
|
ClientLoadReportingWithDropTest() : XdsEnd2endTest(4, 1, 20) {}
|
|
|
|
};
|
|
|
|
|
|
|
|
// Tests that the drop stats are correctly reported by client load reporting.
|
|
|
|
TEST_P(ClientLoadReportingWithDropTest, Vanilla) {
|
|
|
|
SetNextResolution({});
|
|
|
|
SetNextResolutionForLbChannelAllBalancers();
|
|
|
|
const size_t kNumRpcs = 3000;
|
|
|
|
const uint32_t kDropPerMillionForLb = 100000;
|
|
|
|
const uint32_t kDropPerMillionForThrottle = 200000;
|
|
|
|
const double kDropRateForLb = kDropPerMillionForLb / 1000000.0;
|
|
|
|
const double kDropRateForThrottle = kDropPerMillionForThrottle / 1000000.0;
|
|
|
|
const double KDropRateForLbAndThrottle =
|
|
|
|
kDropRateForLb + (1 - kDropRateForLb) * kDropRateForThrottle;
|
|
|
|
// The ADS response contains two drop categories.
|
|
|
|
AdsServiceImpl::EdsResourceArgs args({
|
|
|
|
{"locality0", GetBackendPorts()},
|
|
|
|
});
|
|
|
|
args.drop_categories = {{kLbDropType, kDropPerMillionForLb},
|
|
|
|
{kThrottleDropType, kDropPerMillionForThrottle}};
|
|
|
|
balancers_[0]->ads_service()->SetEdsResource(
|
|
|
|
AdsServiceImpl::BuildEdsResource(args), kDefaultResourceName);
|
|
|
|
int num_ok = 0;
|
|
|
|
int num_failure = 0;
|
|
|
|
int num_drops = 0;
|
|
|
|
std::tie(num_ok, num_failure, num_drops) = WaitForAllBackends();
|
|
|
|
const size_t num_warmup = num_ok + num_failure + num_drops;
|
|
|
|
// Send kNumRpcs RPCs and count the drops.
|
|
|
|
for (size_t i = 0; i < kNumRpcs; ++i) {
|
|
|
|
EchoResponse response;
|
|
|
|
const Status status = SendRpc(&response);
|
|
|
|
if (!status.ok() &&
|
|
|
|
status.error_message() == "Call dropped by load balancing policy") {
|
|
|
|
++num_drops;
|
|
|
|
} else {
|
|
|
|
EXPECT_TRUE(status.ok()) << "code=" << status.error_code()
|
|
|
|
<< " message=" << status.error_message();
|
|
|
|
EXPECT_EQ(response.message(), kRequestMessage_);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// The drop rate should be roughly equal to the expectation.
|
|
|
|
const double seen_drop_rate = static_cast<double>(num_drops) / kNumRpcs;
|
|
|
|
const double kErrorTolerance = 0.2;
|
|
|
|
EXPECT_THAT(
|
|
|
|
seen_drop_rate,
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(KDropRateForLbAndThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(KDropRateForLbAndThrottle * (1 + kErrorTolerance))));
|
|
|
|
// Check client stats.
|
|
|
|
ClientStats* client_stats = balancers_[0]->lrs_service()->WaitForLoadReport();
|
|
|
|
EXPECT_EQ(num_drops, client_stats->total_dropped_requests());
|
|
|
|
const size_t total_rpc = num_warmup + kNumRpcs;
|
|
|
|
EXPECT_THAT(
|
|
|
|
client_stats->dropped_requests(kLbDropType),
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(total_rpc * kDropRateForLb * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(total_rpc * kDropRateForLb * (1 + kErrorTolerance))));
|
|
|
|
EXPECT_THAT(client_stats->dropped_requests(kThrottleDropType),
|
|
|
|
::testing::AllOf(
|
|
|
|
::testing::Ge(total_rpc * (1 - kDropRateForLb) *
|
|
|
|
kDropRateForThrottle * (1 - kErrorTolerance)),
|
|
|
|
::testing::Le(total_rpc * (1 - kDropRateForLb) *
|
|
|
|
kDropRateForThrottle * (1 + kErrorTolerance))));
|
|
|
|
}
|
|
|
|
|
|
|
|
grpc::string TestTypeName(const ::testing::TestParamInfo<TestType>& info) {
|
|
|
|
return info.param.AsString();
|
|
|
|
}
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, BasicTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, SecureNamingTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// LDS depends on XdsResolver.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, LdsTest,
|
|
|
|
::testing::Values(TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// RDS depends on XdsResolver.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, RdsTest,
|
|
|
|
::testing::Values(TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// CDS depends on XdsResolver.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, CdsTest,
|
|
|
|
::testing::Values(TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// EDS could be tested with or without XdsResolver, but the tests would
|
|
|
|
// be the same either way, so we test it only with XdsResolver.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, EdsTest,
|
|
|
|
::testing::Values(TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, LocalityMapTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, FailoverTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, DropTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// Fallback does not work with xds resolver.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, FallbackTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, BalancerUpdateTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(false, false),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// Load reporting tests are not run with load reporting disabled.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, ClientLoadReportingTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
// Load reporting tests are not run with load reporting disabled.
|
|
|
|
INSTANTIATE_TEST_SUITE_P(XdsTest, ClientLoadReportingWithDropTest,
|
|
|
|
::testing::Values(TestType(false, true),
|
|
|
|
TestType(true, true)),
|
|
|
|
&TestTypeName);
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
} // namespace testing
|
|
|
|
} // namespace grpc
|
|
|
|
|
|
|
|
int main(int argc, char** argv) {
|
|
|
|
grpc::testing::TestEnvironment env(argc, argv);
|
|
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
|
|
grpc::testing::WriteBootstrapFiles();
|
|
|
|
grpc::testing::g_port_saver = new grpc::testing::PortSaver();
|
|
|
|
const auto result = RUN_ALL_TESTS();
|
|
|
|
return result;
|
|
|
|
}
|