/
xds_client_outlier_detection_test.go
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/
xds_client_outlier_detection_test.go
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/*
*
* Copyright 2022 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package xds_test
import (
"context"
"errors"
"fmt"
"strings"
"testing"
"time"
v3clusterpb "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3"
v3endpointpb "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
v3listenerpb "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
v3routepb "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/internal/stubserver"
"google.golang.org/grpc/internal/testutils/xds/e2e"
testgrpc "google.golang.org/grpc/test/grpc_testing"
testpb "google.golang.org/grpc/test/grpc_testing"
"google.golang.org/protobuf/types/known/durationpb"
"google.golang.org/protobuf/types/known/wrapperspb"
)
// TestOutlierDetection_NoopConfig tests the scenario where the Outlier
// Detection feature is enabled on the gRPC client, but it receives no Outlier
// Detection configuration from the management server. This should result in a
// no-op Outlier Detection configuration being used to configure the Outlier
// Detection balancer. This test verifies that an RPC is able to proceed
// normally with this configuration.
func (s) TestOutlierDetection_NoopConfig(t *testing.T) {
managementServer, nodeID, _, resolver, cleanup1 := e2e.SetupManagementServer(t, nil)
defer cleanup1()
port, cleanup2 := startTestService(t, nil)
defer cleanup2()
const serviceName = "my-service-client-side-xds"
resources := e2e.DefaultClientResources(e2e.ResourceParams{
DialTarget: serviceName,
NodeID: nodeID,
Host: "localhost",
Port: port,
SecLevel: e2e.SecurityLevelNone,
})
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
if err := managementServer.Update(ctx, resources); err != nil {
t.Fatal(err)
}
// Create a ClientConn and make a successful RPC.
cc, err := grpc.Dial(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(resolver))
if err != nil {
t.Fatalf("failed to dial local test server: %v", err)
}
defer cc.Close()
client := testgrpc.NewTestServiceClient(cc)
if _, err := client.EmptyCall(ctx, &testpb.Empty{}, grpc.WaitForReady(true)); err != nil {
t.Fatalf("rpc EmptyCall() failed: %v", err)
}
}
// clientResourcesMultipleBackendsAndOD returns xDS resources which correspond
// to multiple upstreams, corresponding different backends listening on
// different localhost:port combinations. The resources also configure an
// Outlier Detection Balancer set up with Failure Percentage Algorithm, which
// ejects endpoints based on failure rate.
func clientResourcesMultipleBackendsAndOD(params e2e.ResourceParams, ports []uint32) e2e.UpdateOptions {
routeConfigName := "route-" + params.DialTarget
clusterName := "cluster-" + params.DialTarget
endpointsName := "endpoints-" + params.DialTarget
return e2e.UpdateOptions{
NodeID: params.NodeID,
Listeners: []*v3listenerpb.Listener{e2e.DefaultClientListener(params.DialTarget, routeConfigName)},
Routes: []*v3routepb.RouteConfiguration{e2e.DefaultRouteConfig(routeConfigName, params.DialTarget, clusterName)},
Clusters: []*v3clusterpb.Cluster{clusterWithOutlierDetection(clusterName, endpointsName, params.SecLevel)},
Endpoints: []*v3endpointpb.ClusterLoadAssignment{e2e.DefaultEndpoint(endpointsName, params.Host, ports)},
}
}
func clusterWithOutlierDetection(clusterName, edsServiceName string, secLevel e2e.SecurityLevel) *v3clusterpb.Cluster {
cluster := e2e.DefaultCluster(clusterName, edsServiceName, secLevel)
cluster.OutlierDetection = &v3clusterpb.OutlierDetection{
Interval: &durationpb.Duration{Nanos: 50000000}, // .5 seconds
BaseEjectionTime: &durationpb.Duration{Seconds: 30},
MaxEjectionTime: &durationpb.Duration{Seconds: 300},
MaxEjectionPercent: &wrapperspb.UInt32Value{Value: 1},
FailurePercentageThreshold: &wrapperspb.UInt32Value{Value: 50},
EnforcingFailurePercentage: &wrapperspb.UInt32Value{Value: 100},
FailurePercentageRequestVolume: &wrapperspb.UInt32Value{Value: 1},
FailurePercentageMinimumHosts: &wrapperspb.UInt32Value{Value: 1},
}
return cluster
}
// TestOutlierDetectionWithOutlier tests the Outlier Detection Balancer e2e. It
// spins up three backends, one which consistently errors, and configures the
// ClientConn using xDS to connect to all three of those backends. The Outlier
// Detection Balancer should eject the connection to the backend which
// constantly errors, and thus RPC's should mainly go to backend 1 and 2.
func (s) TestOutlierDetectionWithOutlier(t *testing.T) {
managementServer, nodeID, _, resolver, cleanup := e2e.SetupManagementServer(t, nil)
defer cleanup()
// Counters for how many times backends got called.
var count1, count2, count3 int
// Working backend 1.
port1, cleanup1 := startTestService(t, &stubserver.StubServer{
EmptyCallF: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
count1++
return &testpb.Empty{}, nil
},
Address: "localhost:0",
})
defer cleanup1()
// Working backend 2.
port2, cleanup2 := startTestService(t, &stubserver.StubServer{
EmptyCallF: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
count2++
return &testpb.Empty{}, nil
},
Address: "localhost:0",
})
defer cleanup2()
// Backend 3 that will always return an error and eventually ejected.
port3, cleanup3 := startTestService(t, &stubserver.StubServer{
EmptyCallF: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
count3++
return nil, errors.New("some error")
},
Address: "localhost:0",
})
defer cleanup3()
const serviceName = "my-service-client-side-xds"
resources := clientResourcesMultipleBackendsAndOD(e2e.ResourceParams{
DialTarget: serviceName,
NodeID: nodeID,
Host: "localhost",
SecLevel: e2e.SecurityLevelNone,
}, []uint32{port1, port2, port3})
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
if err := managementServer.Update(ctx, resources); err != nil {
t.Fatal(err)
}
cc, err := grpc.Dial(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(resolver))
if err != nil {
t.Fatalf("failed to dial local test server: %v", err)
}
defer cc.Close()
client := testgrpc.NewTestServiceClient(cc)
for i := 0; i < 2000; i++ {
// Can either error or not depending on the backend called.
if _, err := client.EmptyCall(ctx, &testpb.Empty{}, grpc.WaitForReady(true)); err != nil && !strings.Contains(err.Error(), "some error") {
t.Fatalf("rpc EmptyCall() failed: %v", err)
}
time.Sleep(time.Millisecond)
}
// Backend 1 should've gotten more than 1/3rd of the load as backend 3
// should get ejected, leaving only 1 and 2.
if count1 < 700 {
t.Fatalf("backend 1 should've gotten more than 1/3rd of the load")
}
// Backend 2 should've gotten more than 1/3rd of the load as backend 3
// should get ejected, leaving only 1 and 2.
if count2 < 700 {
t.Fatalf("backend 2 should've gotten more than 1/3rd of the load")
}
// Backend 3 should've gotten less than 1/3rd of the load since it gets
// ejected.
if count3 > 650 {
t.Fatalf("backend 1 should've gotten more than 1/3rd of the load")
}
}