xds: add HTTP connection manager max_stream_duration support

xds/internal/client/client.go

@@ -147,6 +147,10 @@ type ListenerUpdate struct {
 	RouteConfigName string
 	// SecurityCfg contains security configuration sent by the control plane.
 	SecurityCfg *SecurityConfig
+	// MaxStreamDuration contains the HTTP connection manager's
+	// common_http_protocol_options.max_stream_duration field, or zero if
+	// unset.
+	MaxStreamDuration time.Duration
 }
 
 func (lu *ListenerUpdate) String() string {
@@ -181,8 +185,13 @@ type Route struct {
 	Fraction        *uint32
 
 	// If the matchers above indicate a match, the below configuration is used.
-	Action            map[string]uint32 // action is weighted clusters.
-	MaxStreamDuration time.Duration
+	Action map[string]uint32 // action is weighted clusters.
+	// If MaxStreamDuration is nil, it indicates neither of the route action's
+	// max_stream_duration fields (grpc_timeout_header_max nor
+	// max_stream_duration) were set.  In this case, the ListenerUpdate's
+	// MaxStreamDuration field should be used.  If MaxStreamDuration is set to
+	// an explicit zero duration, the application's deadline should be used.
+	MaxStreamDuration *time.Duration
 }
 
 // HeaderMatcher represents header matchers.

xds/internal/client/client_lds_test.go

@@ -21,6 +21,7 @@ package client
 import (
 	"strings"
 	"testing"
+	"time"
 
 	v2xdspb "github.com/envoyproxy/go-control-plane/envoy/api/v2"
 	v2corepb "github.com/envoyproxy/go-control-plane/envoy/api/v2/core"
@@ -36,6 +37,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
 	"google.golang.org/grpc/xds/internal/version"
+	"google.golang.org/protobuf/types/known/durationpb"
 )
 
 func (s) TestUnmarshalListener_ClientSide(t *testing.T) {
@@ -86,6 +88,9 @@ func (s) TestUnmarshalListener_ClientSide(t *testing.T) {
 							RouteConfigName: v3RouteConfigName,
 						},
 					},
+					CommonHttpProtocolOptions: &v3corepb.HttpProtocolOptions{
+						MaxStreamDuration: durationpb.New(time.Second),
+					},
 				}
 				mcm, _ := proto.Marshal(cm)
 				lis := &v3listenerpb.Listener{
@@ -280,15 +285,15 @@ func (s) TestUnmarshalListener_ClientSide(t *testing.T) {
 			name:      "v3 listener resource",
 			resources: []*anypb.Any{v3Lis},
 			wantUpdate: map[string]ListenerUpdate{
-				v3LDSTarget: {RouteConfigName: v3RouteConfigName},
+				v3LDSTarget: {RouteConfigName: v3RouteConfigName, MaxStreamDuration: time.Second},
 			},
 		},
 		{
 			name:      "multiple listener resources",
 			resources: []*anypb.Any{v2Lis, v3Lis},
 			wantUpdate: map[string]ListenerUpdate{
 				v2LDSTarget: {RouteConfigName: v2RouteConfigName},
-				v3LDSTarget: {RouteConfigName: v3RouteConfigName},
+				v3LDSTarget: {RouteConfigName: v3RouteConfigName, MaxStreamDuration: time.Second},
 			},
 		},
 	}

xds/internal/client/client_rds_test.go

@@ -317,7 +317,7 @@ func (s) TestRDSGenerateRDSUpdateFromRouteConfiguration(t *testing.T) {
 				VirtualHosts: []*VirtualHost{
 					{
 						Domains: []string{ldsTarget},
-						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: time.Second}},
+						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: newDurationP(time.Second)}},
 					},
 				},
 			},
@@ -347,7 +347,7 @@ func (s) TestRDSGenerateRDSUpdateFromRouteConfiguration(t *testing.T) {
 				VirtualHosts: []*VirtualHost{
 					{
 						Domains: []string{ldsTarget},
-						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: time.Second}},
+						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: newDurationP(time.Second)}},
 					},
 				},
 			},
@@ -377,7 +377,7 @@ func (s) TestRDSGenerateRDSUpdateFromRouteConfiguration(t *testing.T) {
 				VirtualHosts: []*VirtualHost{
 					{
 						Domains: []string{ldsTarget},
-						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: 0}},
+						Routes:  []*Route{{Prefix: newStringP("/"), Action: map[string]uint32{clusterName: 1}, MaxStreamDuration: newDurationP(0)}},
 					},
 				},
 			},
@@ -739,3 +739,7 @@ func newUInt32P(i uint32) *uint32 {
 func newBoolP(b bool) *bool {
 	return &b
 }
+
+func newDurationP(d time.Duration) *time.Duration {
+	return &d
+}

xds/internal/client/client_xds.go

@@ -80,6 +80,8 @@ func processListener(lis *v3listenerpb.Listener) (*ListenerUpdate, error) {
 // processClientSideListener checks if the provided Listener proto meets
 // the expected criteria. If so, it returns a non-empty routeConfigName.
 func processClientSideListener(lis *v3listenerpb.Listener) (*ListenerUpdate, error) {
+	update := &ListenerUpdate{}
+
 	apiLisAny := lis.GetApiListener().GetApiListener()
 	if !IsHTTPConnManagerResource(apiLisAny.GetTypeUrl()) {
 		return nil, fmt.Errorf("xds: unexpected resource type: %q in LDS response", apiLisAny.GetTypeUrl())
@@ -98,7 +100,7 @@ func processClientSideListener(lis *v3listenerpb.Listener) (*ListenerUpdate, err
 		if name == "" {
 			return nil, fmt.Errorf("xds: empty route_config_name in LDS response: %+v", lis)
 		}
-		return &ListenerUpdate{RouteConfigName: name}, nil
+		update.RouteConfigName = name
 	case *v3httppb.HttpConnectionManager_RouteConfig:
 		// TODO: Add support for specifying the RouteConfiguration inline
 		// in the LDS response.
@@ -108,6 +110,10 @@ func processClientSideListener(lis *v3listenerpb.Listener) (*ListenerUpdate, err
 	default:
 		return nil, fmt.Errorf("xds: unsupported type %T for RouteSpecifier in received LDS response", apiLis.RouteSpecifier)
 	}
+
+	update.MaxStreamDuration = apiLis.GetCommonHttpProtocolOptions().GetMaxStreamDuration().AsDuration()
+
+	return update, nil
 }
 
 func processServerSideListener(lis *v3listenerpb.Listener) (*ListenerUpdate, error) {
@@ -342,12 +348,16 @@ func routesProtoToSlice(routes []*v3routepb.Route, logger *grpclog.PrefixLogger)
 		}
 
 		route.Action = clusters
+
 		msd := action.GetMaxStreamDuration()
 		// Prefer grpc_timeout_header_max, if set.
-		if dur := msd.GetGrpcTimeoutHeaderMax(); dur != nil {
-			route.MaxStreamDuration = dur.AsDuration()
-		} else {
-			route.MaxStreamDuration = msd.GetMaxStreamDuration().AsDuration()
+		dur := msd.GetGrpcTimeoutHeaderMax()
+		if dur == nil {
+			dur = msd.GetMaxStreamDuration()
+		}
+		if dur != nil {
+			d := dur.AsDuration()
+			route.MaxStreamDuration = &d
 		}
 		routesRet = append(routesRet, &route)
 	}

xds/internal/resolver/serviceconfig.go

@@ -201,11 +201,11 @@ var newWRR = wrr.NewRandom
 func (r *xdsResolver) newConfigSelector(su serviceUpdate) (*configSelector, error) {
 	cs := &configSelector{
 		r:        r,
-		routes:   make([]route, len(su.Routes)),
+		routes:   make([]route, len(su.routes)),
 		clusters: make(map[string]*clusterInfo),
 	}
 
-	for i, rt := range su.Routes {
+	for i, rt := range su.routes {
 		clusters := newWRR()
 		for cluster, weight := range rt.Action {
 			clusters.Add(cluster, int64(weight))
@@ -227,7 +227,11 @@ func (r *xdsResolver) newConfigSelector(su serviceUpdate) (*configSelector, erro
 		if err != nil {
 			return nil, err
 		}
-		cs.routes[i].maxStreamDuration = rt.MaxStreamDuration
+		if rt.MaxStreamDuration == nil {
+			cs.routes[i].maxStreamDuration = su.ldsConfig.maxStreamDuration
+		} else {
+			cs.routes[i].maxStreamDuration = *rt.MaxStreamDuration
+		}
 	}
 
 	return cs, nil

xds/internal/resolver/watch_service.go

@@ -22,17 +22,28 @@ import (
 	"fmt"
 	"strings"
 	"sync"
+	"time"
 
 	"google.golang.org/grpc/internal/grpclog"
 	xdsclient "google.golang.org/grpc/xds/internal/client"
 )
 
-// serviceUpdate contains information received from the RDS responses which is
-// of interested to the xds resolver. The RDS request is built by first making a
-// LDS to get the RouteConfig name.
+// serviceUpdate contains information received from the LDS/RDS responses which
+// are of interest to the xds resolver. The RDS request is built by first
+// making a LDS to get the RouteConfig name.
 type serviceUpdate struct {
-	// Routes contain matchers+actions to route RPCs.
-	Routes []*xdsclient.Route
+	// routes contain matchers+actions to route RPCs.
+	routes []*xdsclient.Route
+	// ldsConfig contains configuration that applies to all routes.
+	ldsConfig ldsConfig
+}
+
+// ldsConfig contains information received from the LDS responses which are of
+// interest to the xds resolver.
+type ldsConfig struct {
+	// maxStreamDuration is from the HTTP connection manager's
+	// common_http_protocol_options field.
+	maxStreamDuration time.Duration
 }
 
 // watchService uses LDS and RDS to discover information about the provided
@@ -61,6 +72,7 @@ type serviceUpdateWatcher struct {
 	serviceName string
 	ldsCancel   func()
 	serviceCb   func(serviceUpdate, error)
+	lastUpdate  serviceUpdate
 
 	mu        sync.Mutex
 	closed    bool
@@ -84,16 +96,26 @@ func (w *serviceUpdateWatcher) handleLDSResp(update xdsclient.ListenerUpdate, er
 			w.rdsCancel()
 			w.rdsName = ""
 			w.rdsCancel = nil
+			w.lastUpdate = serviceUpdate{}
 		}
 		// The other error cases still return early without canceling the
 		// existing RDS watch.
 		w.serviceCb(serviceUpdate{}, err)
 		return
 	}
 
+	oldLDSConfig := w.lastUpdate.ldsConfig
+	w.lastUpdate.ldsConfig = ldsConfig{maxStreamDuration: update.MaxStreamDuration}
+
 	if w.rdsName == update.RouteConfigName {
 		// If the new RouteConfigName is same as the previous, don't cancel and
 		// restart the RDS watch.
+		if w.lastUpdate.ldsConfig != oldLDSConfig {
+			// The route name didn't change but the LDS data did; send it now.
+			// If the route name did change, then we will wait until the first
+			// RDS update before reporting this LDS config.
+			w.serviceCb(w.lastUpdate, nil)
+		}
 		return
 	}
 	w.rdsName = update.RouteConfigName
@@ -127,7 +149,8 @@ func (w *serviceUpdateWatcher) handleRDSResp(update xdsclient.RouteConfigUpdate,
 		return
 	}
 
-	w.serviceCb(serviceUpdate{Routes: matchVh.Routes}, nil)
+	w.lastUpdate.routes = matchVh.Routes
+	w.serviceCb(w.lastUpdate, nil)
 }
 
 func (w *serviceUpdateWatcher) close() {

xds/internal/resolver/watch_service_test.go

@@ -22,6 +22,7 @@ import (
 	"context"
 	"fmt"
 	"testing"
+	"time"
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
@@ -138,7 +139,7 @@ func verifyServiceUpdate(ctx context.Context, updateCh *testutils.Channel, wantU
 		return fmt.Errorf("timeout when waiting for service update: %v", err)
 	}
 	gotUpdate := u.(serviceUpdateErr)
-	if gotUpdate.err != nil || !cmp.Equal(gotUpdate.u, wantUpdate, cmpopts.EquateEmpty()) {
+	if gotUpdate.err != nil || !cmp.Equal(gotUpdate.u, wantUpdate, cmpopts.EquateEmpty(), cmp.AllowUnexported(serviceUpdate{}, ldsConfig{})) {
 		return fmt.Errorf("unexpected service update: (%v, %v), want: (%v, nil),  diff (-want +got):\n%s", gotUpdate.u, gotUpdate.err, wantUpdate, cmp.Diff(gotUpdate.u, wantUpdate, cmpopts.EquateEmpty()))
 	}
 	return nil
@@ -165,7 +166,7 @@ func (s) TestServiceWatch(t *testing.T) {
 	xdsC.InvokeWatchListenerCallback(xdsclient.ListenerUpdate{RouteConfigName: routeStr}, nil)
 	waitForWatchRouteConfig(ctx, t, xdsC, routeStr)
 
-	wantUpdate := serviceUpdate{Routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
+	wantUpdate := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
 	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
 		VirtualHosts: []*xdsclient.VirtualHost{
 			{
@@ -179,7 +180,7 @@ func (s) TestServiceWatch(t *testing.T) {
 	}
 
 	wantUpdate2 := serviceUpdate{
-		Routes: []*xdsclient.Route{{
+		routes: []*xdsclient.Route{{
 			Path:   newStringP(""),
 			Action: map[string]uint32{cluster: 1},
 		}},
@@ -219,7 +220,7 @@ func (s) TestServiceWatchLDSUpdate(t *testing.T) {
 	xdsC.InvokeWatchListenerCallback(xdsclient.ListenerUpdate{RouteConfigName: routeStr}, nil)
 	waitForWatchRouteConfig(ctx, t, xdsC, routeStr)
 
-	wantUpdate := serviceUpdate{Routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
+	wantUpdate := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
 	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
 		VirtualHosts: []*xdsclient.VirtualHost{
 			{
@@ -240,7 +241,7 @@ func (s) TestServiceWatchLDSUpdate(t *testing.T) {
 	waitForWatchRouteConfig(ctx, t, xdsC, routeStr+"2")
 
 	// RDS update for the new name.
-	wantUpdate2 := serviceUpdate{Routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster + "2": 1}}}}
+	wantUpdate2 := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster + "2": 1}}}}
 	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
 		VirtualHosts: []*xdsclient.VirtualHost{
 			{
@@ -254,6 +255,58 @@ func (s) TestServiceWatchLDSUpdate(t *testing.T) {
 	}
 }
 
+// TestServiceWatchLDSUpdate covers the case that after first LDS and first RDS
+// response, the second LDS response includes a new MaxStreamDuration.  It also
+// verifies this is reported in subsequent RDS updates.
+func (s) TestServiceWatchLDSUpdateMaxStreamDuration(t *testing.T) {
+	serviceUpdateCh := testutils.NewChannel()
+	xdsC := fakeclient.NewClient()
+	cancelWatch := watchService(xdsC, targetStr, func(update serviceUpdate, err error) {
+		serviceUpdateCh.Send(serviceUpdateErr{u: update, err: err})
+	}, nil)
+	defer cancelWatch()
+
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+	waitForWatchListener(ctx, t, xdsC, targetStr)
+	xdsC.InvokeWatchListenerCallback(xdsclient.ListenerUpdate{RouteConfigName: routeStr, MaxStreamDuration: time.Second}, nil)
+	waitForWatchRouteConfig(ctx, t, xdsC, routeStr)
+
+	wantUpdate := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}, ldsConfig: ldsConfig{maxStreamDuration: time.Second}}
+	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
+		VirtualHosts: []*xdsclient.VirtualHost{
+			{
+				Domains: []string{targetStr},
+				Routes:  []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}},
+			},
+		},
+	}, nil)
+	if err := verifyServiceUpdate(ctx, serviceUpdateCh, wantUpdate); err != nil {
+		t.Fatal(err)
+	}
+
+	// Another LDS update with the same RDS_name but different MaxStreamDuration (zero in this case).
+	wantUpdate2 := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
+	xdsC.InvokeWatchListenerCallback(xdsclient.ListenerUpdate{RouteConfigName: routeStr}, nil)
+	if err := verifyServiceUpdate(ctx, serviceUpdateCh, wantUpdate2); err != nil {
+		t.Fatal(err)
+	}
+
+	// RDS update.
+	wantUpdate3 := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster + "2": 1}}}}
+	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
+		VirtualHosts: []*xdsclient.VirtualHost{
+			{
+				Domains: []string{targetStr},
+				Routes:  []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster + "2": 1}}},
+			},
+		},
+	}, nil)
+	if err := verifyServiceUpdate(ctx, serviceUpdateCh, wantUpdate3); err != nil {
+		t.Fatal(err)
+	}
+}
+
 // TestServiceNotCancelRDSOnSameLDSUpdate covers the case that if the second LDS
 // update contains the same RDS name as the previous, the RDS watch isn't
 // canceled and restarted.
@@ -271,7 +324,7 @@ func (s) TestServiceNotCancelRDSOnSameLDSUpdate(t *testing.T) {
 	xdsC.InvokeWatchListenerCallback(xdsclient.ListenerUpdate{RouteConfigName: routeStr}, nil)
 	waitForWatchRouteConfig(ctx, t, xdsC, routeStr)
 
-	wantUpdate := serviceUpdate{Routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
+	wantUpdate := serviceUpdate{routes: []*xdsclient.Route{{Prefix: newStringP(""), Action: map[string]uint32{cluster: 1}}}}
 	xdsC.InvokeWatchRouteConfigCallback(xdsclient.RouteConfigUpdate{
 		VirtualHosts: []*xdsclient.VirtualHost{
 			{