mirror of https://github.com/grpc/grpc-go.git
244 lines
9.5 KiB
Go
244 lines
9.5 KiB
Go
/*
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*
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* Copyright 2022 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 xds_test
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"time"
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v3clusterpb "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3"
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v3endpointpb "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
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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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"github.com/google/go-cmp/cmp"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/internal/stubserver"
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"google.golang.org/grpc/internal/testutils/xds/e2e"
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"google.golang.org/grpc/peer"
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"google.golang.org/grpc/resolver"
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testgrpc "google.golang.org/grpc/test/grpc_testing"
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testpb "google.golang.org/grpc/test/grpc_testing"
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"google.golang.org/protobuf/types/known/durationpb"
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"google.golang.org/protobuf/types/known/wrapperspb"
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)
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// TestOutlierDetection_NoopConfig tests the scenario where the Outlier
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// Detection feature is enabled on the gRPC client, but it receives no Outlier
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// Detection configuration from the management server. This should result in a
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// no-op Outlier Detection configuration being used to configure the Outlier
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// Detection balancer. This test verifies that an RPC is able to proceed
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// normally with this configuration.
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func (s) TestOutlierDetection_NoopConfig(t *testing.T) {
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managementServer, nodeID, _, resolver, cleanup1 := e2e.SetupManagementServer(t, e2e.ManagementServerOptions{})
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defer cleanup1()
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port, cleanup2 := startTestService(t, nil)
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defer cleanup2()
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const serviceName = "my-service-client-side-xds"
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resources := e2e.DefaultClientResources(e2e.ResourceParams{
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DialTarget: serviceName,
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NodeID: nodeID,
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Host: "localhost",
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Port: port,
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SecLevel: e2e.SecurityLevelNone,
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})
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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if err := managementServer.Update(ctx, resources); err != nil {
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t.Fatal(err)
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}
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// Create a ClientConn and make a successful RPC.
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cc, err := grpc.Dial(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(resolver))
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if err != nil {
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t.Fatalf("failed to dial local test server: %v", err)
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}
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defer cc.Close()
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client := testgrpc.NewTestServiceClient(cc)
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if _, err := client.EmptyCall(ctx, &testpb.Empty{}, grpc.WaitForReady(true)); err != nil {
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t.Fatalf("rpc EmptyCall() failed: %v", err)
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}
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}
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// clientResourcesMultipleBackendsAndOD returns xDS resources which correspond
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// to multiple upstreams, corresponding different backends listening on
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// different localhost:port combinations. The resources also configure an
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// Outlier Detection Balancer set up with Failure Percentage Algorithm, which
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// ejects endpoints based on failure rate.
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func clientResourcesMultipleBackendsAndOD(params e2e.ResourceParams, ports []uint32) e2e.UpdateOptions {
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routeConfigName := "route-" + params.DialTarget
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clusterName := "cluster-" + params.DialTarget
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endpointsName := "endpoints-" + params.DialTarget
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return e2e.UpdateOptions{
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NodeID: params.NodeID,
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Listeners: []*v3listenerpb.Listener{e2e.DefaultClientListener(params.DialTarget, routeConfigName)},
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Routes: []*v3routepb.RouteConfiguration{e2e.DefaultRouteConfig(routeConfigName, params.DialTarget, clusterName)},
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Clusters: []*v3clusterpb.Cluster{clusterWithOutlierDetection(clusterName, endpointsName, params.SecLevel)},
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Endpoints: []*v3endpointpb.ClusterLoadAssignment{e2e.DefaultEndpoint(endpointsName, params.Host, ports)},
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}
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}
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func clusterWithOutlierDetection(clusterName, edsServiceName string, secLevel e2e.SecurityLevel) *v3clusterpb.Cluster {
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cluster := e2e.DefaultCluster(clusterName, edsServiceName, secLevel)
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cluster.OutlierDetection = &v3clusterpb.OutlierDetection{
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Interval: &durationpb.Duration{Nanos: 50000000}, // .5 seconds
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BaseEjectionTime: &durationpb.Duration{Seconds: 30},
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MaxEjectionTime: &durationpb.Duration{Seconds: 300},
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MaxEjectionPercent: &wrapperspb.UInt32Value{Value: 1},
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FailurePercentageThreshold: &wrapperspb.UInt32Value{Value: 50},
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EnforcingFailurePercentage: &wrapperspb.UInt32Value{Value: 100},
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FailurePercentageRequestVolume: &wrapperspb.UInt32Value{Value: 8},
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FailurePercentageMinimumHosts: &wrapperspb.UInt32Value{Value: 3},
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}
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return cluster
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}
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// checkRoundRobinRPCs verifies that EmptyCall RPCs on the given ClientConn,
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// connected to a server exposing the test.grpc_testing.TestService, are
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// roundrobined across the given backend addresses.
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//
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// Returns a non-nil error if context deadline expires before RPCs start to get
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// roundrobined across the given backends.
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func checkRoundRobinRPCs(ctx context.Context, client testpb.TestServiceClient, addrs []resolver.Address) error {
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wantAddrCount := make(map[string]int)
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for _, addr := range addrs {
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wantAddrCount[addr.Addr]++
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}
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for ; ctx.Err() == nil; <-time.After(time.Millisecond) {
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// Perform 3 iterations.
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var iterations [][]string
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for i := 0; i < 3; i++ {
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iteration := make([]string, len(addrs))
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for c := 0; c < len(addrs); c++ {
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var peer peer.Peer
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client.EmptyCall(ctx, &testpb.Empty{}, grpc.Peer(&peer))
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if peer.Addr != nil {
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iteration[c] = peer.Addr.String()
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}
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}
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iterations = append(iterations, iteration)
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}
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// Ensure the the first iteration contains all addresses in addrs.
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gotAddrCount := make(map[string]int)
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for _, addr := range iterations[0] {
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gotAddrCount[addr]++
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}
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if diff := cmp.Diff(gotAddrCount, wantAddrCount); diff != "" {
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continue
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}
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// Ensure all three iterations contain the same addresses.
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if !cmp.Equal(iterations[0], iterations[1]) || !cmp.Equal(iterations[0], iterations[2]) {
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continue
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}
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return nil
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}
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return fmt.Errorf("timeout when waiting for roundrobin distribution of RPCs across addresses: %v", addrs)
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}
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// TestOutlierDetectionWithOutlier tests the Outlier Detection Balancer e2e. It
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// spins up three backends, one which consistently errors, and configures the
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// ClientConn using xDS to connect to all three of those backends. The Outlier
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// Detection Balancer should eject the connection to the backend which
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// constantly errors, causing RPC's to not be routed to that upstream, and only
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// be Round Robined across the two healthy upstreams. Other than the intervals
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// the unhealthy upstream is ejected, RPC's should regularly round robin across
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// all three upstreams.
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func (s) TestOutlierDetectionWithOutlier(t *testing.T) {
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managementServer, nodeID, _, r, cleanup := e2e.SetupManagementServer(t, e2e.ManagementServerOptions{})
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defer cleanup()
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// Working backend 1.
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backend1 := &stubserver.StubServer{
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EmptyCallF: func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
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return &testpb.Empty{}, nil
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},
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}
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port1, cleanup1 := startTestService(t, backend1)
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defer cleanup1()
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// Working backend 2.
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backend2 := &stubserver.StubServer{
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EmptyCallF: func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
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return &testpb.Empty{}, nil
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},
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}
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port2, cleanup2 := startTestService(t, backend2)
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defer cleanup2()
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// Backend 3 that will always return an error and eventually ejected.
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backend3 := &stubserver.StubServer{
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EmptyCallF: func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
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return nil, errors.New("some error")
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},
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}
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port3, cleanup3 := startTestService(t, backend3)
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defer cleanup3()
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const serviceName = "my-service-client-side-xds"
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resources := clientResourcesMultipleBackendsAndOD(e2e.ResourceParams{
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DialTarget: serviceName,
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NodeID: nodeID,
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Host: "localhost",
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SecLevel: e2e.SecurityLevelNone,
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}, []uint32{port1, port2, port3})
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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if err := managementServer.Update(ctx, resources); err != nil {
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t.Fatal(err)
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}
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cc, err := grpc.Dial(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(r))
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if err != nil {
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t.Fatalf("failed to dial local test server: %v", err)
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}
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defer cc.Close()
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client := testgrpc.NewTestServiceClient(cc)
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fullAddresses := []resolver.Address{
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{Addr: backend1.Address},
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{Addr: backend2.Address},
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{Addr: backend3.Address},
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}
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// At first, due to no statistics on each of the backends, the 3
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// upstreams should all be round robined across.
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if err = checkRoundRobinRPCs(ctx, client, fullAddresses); err != nil {
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t.Fatalf("error in expected round robin: %v", err)
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}
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// The addresses which don't return errors.
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okAddresses := []resolver.Address{
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{Addr: backend1.Address},
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{Addr: backend2.Address},
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}
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// After calling the three upstreams, one of them constantly error
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// and should eventually be ejected for a period of time. This
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// period of time should cause the RPC's to be round robined only
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// across the two that are healthy.
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if err = checkRoundRobinRPCs(ctx, client, okAddresses); err != nil {
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t.Fatalf("error in expected round robin: %v", err)
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}
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}
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