mirror of https://github.com/grpc/grpc-go.git
340 lines
11 KiB
Go
340 lines
11 KiB
Go
/*
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*
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* Copyright 2021 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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package resolver_test
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import (
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"context"
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"encoding/json"
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"fmt"
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"testing"
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"github.com/google/uuid"
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"google.golang.org/grpc/balancer"
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iresolver "google.golang.org/grpc/internal/resolver"
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"google.golang.org/grpc/internal/testutils"
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"google.golang.org/grpc/internal/testutils/xds/e2e"
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"google.golang.org/grpc/resolver"
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"google.golang.org/grpc/serviceconfig"
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"google.golang.org/grpc/xds/internal/balancer/clustermanager"
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"google.golang.org/grpc/xds/internal/clusterspecifier"
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"google.golang.org/protobuf/proto"
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"google.golang.org/protobuf/types/known/anypb"
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"google.golang.org/protobuf/types/known/wrapperspb"
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v3listenerpb "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
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v3routepb "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
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)
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func init() {
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balancer.Register(cspBalancerBuilder{})
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clusterspecifier.Register(testClusterSpecifierPlugin{})
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}
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// cspBalancerBuilder is a no-op LB policy which is referenced by the
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// testClusterSpecifierPlugin.
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type cspBalancerBuilder struct{}
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func (cspBalancerBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
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return nil
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}
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func (cspBalancerBuilder) Name() string {
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return "csp_experimental"
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}
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type cspBalancerConfig struct {
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serviceconfig.LoadBalancingConfig
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ArbitraryField string `json:"arbitrary_field"`
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}
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func (cspBalancerBuilder) ParseConfig(lbCfg json.RawMessage) (serviceconfig.LoadBalancingConfig, error) {
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cfg := &cspBalancerConfig{}
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if err := json.Unmarshal(lbCfg, cfg); err != nil {
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return nil, err
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}
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return cfg, nil
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}
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// testClusterSpecifierPlugin is a test cluster specifier plugin which returns
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// an LB policy configuration specifying the cspBalancer.
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type testClusterSpecifierPlugin struct {
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}
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func (testClusterSpecifierPlugin) TypeURLs() []string {
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// The config for this plugin contains a wrapperspb.StringValue, and since
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// we marshal that proto as an Any proto, the type URL on the latter gets
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// set to "type.googleapis.com/google.protobuf.StringValue". If we wanted a
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// more descriptive type URL for this test plugin, we would have to define a
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// proto package with a message for the configuration. That would be
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// overkill for a test. Therefore, this seems to be an acceptable tradeoff.
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return []string{"type.googleapis.com/google.protobuf.StringValue"}
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}
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func (testClusterSpecifierPlugin) ParseClusterSpecifierConfig(cfg proto.Message) (clusterspecifier.BalancerConfig, error) {
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if cfg == nil {
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return nil, fmt.Errorf("testClusterSpecifierPlugin: nil configuration message provided")
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}
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anyp, ok := cfg.(*anypb.Any)
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if !ok {
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return nil, fmt.Errorf("testClusterSpecifierPlugin: error parsing config %v: got type %T, want *anypb.Any", cfg, cfg)
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}
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lbCfg := new(wrapperspb.StringValue)
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if err := anypb.UnmarshalTo(anyp, lbCfg, proto.UnmarshalOptions{}); err != nil {
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return nil, fmt.Errorf("testClusterSpecifierPlugin: error parsing config %v: %v", cfg, err)
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}
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return []map[string]any{{"csp_experimental": cspBalancerConfig{ArbitraryField: lbCfg.GetValue()}}}, nil
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}
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// TestResolverClusterSpecifierPlugin tests the case where a route configuration
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// containing cluster specifier plugins is sent by the management server. The
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// test verifies that the service config output by the resolver contains the LB
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// policy specified by the cluster specifier plugin, and the config selector
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// returns the cluster associated with the cluster specifier plugin.
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//
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// The test also verifies that a change in the cluster specifier plugin config
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// result in appropriate change in the service config pushed by the resolver.
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func (s) TestResolverClusterSpecifierPlugin(t *testing.T) {
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// Spin up an xDS management server for the test.
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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nodeID := uuid.New().String()
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mgmtServer, _, _, bc := setupManagementServerForTest(ctx, t, nodeID)
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// Configure resources on the management server.
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listeners := []*v3listenerpb.Listener{e2e.DefaultClientListener(defaultTestServiceName, defaultTestRouteConfigName)}
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routes := []*v3routepb.RouteConfiguration{e2e.RouteConfigResourceWithOptions(e2e.RouteConfigOptions{
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RouteConfigName: defaultTestRouteConfigName,
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ListenerName: defaultTestServiceName,
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ClusterSpecifierType: e2e.RouteConfigClusterSpecifierTypeClusterSpecifierPlugin,
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ClusterSpecifierPluginName: "cspA",
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ClusterSpecifierPluginConfig: testutils.MarshalAny(t, &wrapperspb.StringValue{Value: "anything"}),
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})}
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configureResourcesOnManagementServer(ctx, t, mgmtServer, nodeID, listeners, routes)
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stateCh, _, _ := buildResolverForTarget(t, resolver.Target{URL: *testutils.MustParseURL("xds:///" + defaultTestServiceName)}, bc)
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// Wait for an update from the resolver, and verify the service config.
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wantSC := `
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{
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"loadBalancingConfig": [
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{
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"xds_cluster_manager_experimental": {
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"children": {
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"cluster_specifier_plugin:cspA": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "anything"
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}
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}
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]
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}
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}
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}
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}
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]
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}`
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cs := verifyUpdateFromResolver(ctx, t, stateCh, wantSC)
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res, err := cs.SelectConfig(iresolver.RPCInfo{Context: ctx, Method: "/service/method"})
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if err != nil {
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t.Fatalf("cs.SelectConfig(): %v", err)
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}
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gotCluster := clustermanager.GetPickedClusterForTesting(res.Context)
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wantCluster := "cluster_specifier_plugin:cspA"
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if gotCluster != wantCluster {
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t.Fatalf("config selector returned cluster: %v, want: %v", gotCluster, wantCluster)
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}
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// Change the cluster specifier plugin configuration.
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routes = []*v3routepb.RouteConfiguration{e2e.RouteConfigResourceWithOptions(e2e.RouteConfigOptions{
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RouteConfigName: defaultTestRouteConfigName,
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ListenerName: defaultTestServiceName,
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ClusterSpecifierType: e2e.RouteConfigClusterSpecifierTypeClusterSpecifierPlugin,
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ClusterSpecifierPluginName: "cspA",
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ClusterSpecifierPluginConfig: testutils.MarshalAny(t, &wrapperspb.StringValue{Value: "changed"}),
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})}
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configureResourcesOnManagementServer(ctx, t, mgmtServer, nodeID, listeners, routes)
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// Wait for an update from the resolver, and verify the service config.
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wantSC = `
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{
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"loadBalancingConfig": [
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{
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"xds_cluster_manager_experimental": {
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"children": {
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"cluster_specifier_plugin:cspA": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "changed"
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}
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}
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]
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}
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}
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}
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}
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]
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}`
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verifyUpdateFromResolver(ctx, t, stateCh, wantSC)
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}
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// TestXDSResolverDelayedOnCommittedCSP tests that cluster specifier plugins and
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// their corresponding configurations remain in service config if RPCs are in
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// flight.
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func (s) TestXDSResolverDelayedOnCommittedCSP(t *testing.T) {
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// Spin up an xDS management server for the test.
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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nodeID := uuid.New().String()
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mgmtServer, _, _, bc := setupManagementServerForTest(ctx, t, nodeID)
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// Configure resources on the management server.
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listeners := []*v3listenerpb.Listener{e2e.DefaultClientListener(defaultTestServiceName, defaultTestRouteConfigName)}
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routes := []*v3routepb.RouteConfiguration{e2e.RouteConfigResourceWithOptions(e2e.RouteConfigOptions{
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RouteConfigName: defaultTestRouteConfigName,
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ListenerName: defaultTestServiceName,
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ClusterSpecifierType: e2e.RouteConfigClusterSpecifierTypeClusterSpecifierPlugin,
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ClusterSpecifierPluginName: "cspA",
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ClusterSpecifierPluginConfig: testutils.MarshalAny(t, &wrapperspb.StringValue{Value: "anythingA"}),
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})}
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configureResourcesOnManagementServer(ctx, t, mgmtServer, nodeID, listeners, routes)
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stateCh, _, _ := buildResolverForTarget(t, resolver.Target{URL: *testutils.MustParseURL("xds:///" + defaultTestServiceName)}, bc)
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// Wait for an update from the resolver, and verify the service config.
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wantSC := `
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{
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"loadBalancingConfig": [
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{
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"xds_cluster_manager_experimental": {
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"children": {
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"cluster_specifier_plugin:cspA": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "anythingA"
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}
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}
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]
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}
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}
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}
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}
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]
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}`
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cs := verifyUpdateFromResolver(ctx, t, stateCh, wantSC)
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resOld, err := cs.SelectConfig(iresolver.RPCInfo{Context: ctx, Method: "/service/method"})
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if err != nil {
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t.Fatalf("cs.SelectConfig(): %v", err)
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}
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gotCluster := clustermanager.GetPickedClusterForTesting(resOld.Context)
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wantCluster := "cluster_specifier_plugin:cspA"
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if gotCluster != wantCluster {
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t.Fatalf("config selector returned cluster: %v, want: %v", gotCluster, wantCluster)
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}
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// Delay resOld.OnCommitted(). As long as there are pending RPCs to removed
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// clusters, they still appear in the service config.
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// Change the cluster specifier plugin configuration.
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routes = []*v3routepb.RouteConfiguration{e2e.RouteConfigResourceWithOptions(e2e.RouteConfigOptions{
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RouteConfigName: defaultTestRouteConfigName,
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ListenerName: defaultTestServiceName,
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ClusterSpecifierType: e2e.RouteConfigClusterSpecifierTypeClusterSpecifierPlugin,
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ClusterSpecifierPluginName: "cspB",
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ClusterSpecifierPluginConfig: testutils.MarshalAny(t, &wrapperspb.StringValue{Value: "anythingB"}),
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})}
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configureResourcesOnManagementServer(ctx, t, mgmtServer, nodeID, listeners, routes)
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// Wait for an update from the resolver, and verify the service config.
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wantSC = `
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{
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"loadBalancingConfig": [
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{
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"xds_cluster_manager_experimental": {
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"children": {
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"cluster_specifier_plugin:cspA": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "anythingA"
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}
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}
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]
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},
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"cluster_specifier_plugin:cspB": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "anythingB"
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}
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}
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]
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}
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}
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}
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}
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]
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}`
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cs = verifyUpdateFromResolver(ctx, t, stateCh, wantSC)
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// Perform an RPC and ensure that it is routed to the new cluster.
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resNew, err := cs.SelectConfig(iresolver.RPCInfo{Context: ctx, Method: "/service/method"})
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if err != nil {
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t.Fatalf("cs.SelectConfig(): %v", err)
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}
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gotCluster = clustermanager.GetPickedClusterForTesting(resNew.Context)
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wantCluster = "cluster_specifier_plugin:cspB"
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if gotCluster != wantCluster {
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t.Fatalf("config selector returned cluster: %v, want: %v", gotCluster, wantCluster)
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}
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// Invoke resOld.OnCommitted; should lead to a service config update that deletes
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// cspA.
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resOld.OnCommitted()
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wantSC = `
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{
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"loadBalancingConfig": [
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{
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"xds_cluster_manager_experimental": {
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"children": {
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"cluster_specifier_plugin:cspB": {
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"childPolicy": [
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{
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"csp_experimental": {
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"arbitrary_field": "anythingB"
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}
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}
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]
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}
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}
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}
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}
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]
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}`
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verifyUpdateFromResolver(ctx, t, stateCh, wantSC)
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}
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