diff --git a/tests/e2e/failover_test.go b/tests/e2e/failover_test.go new file mode 100644 index 000000000000..7335acc18f8f --- /dev/null +++ b/tests/e2e/failover_test.go @@ -0,0 +1,163 @@ +// Copyright 2023 The etcd 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. + +//go:build !cluster_proxy + +package e2e + +import ( + "context" + "testing" + "time" + + "github.com/stretchr/testify/require" + "google.golang.org/grpc" + _ "google.golang.org/grpc/health" + + clientv3 "go.etcd.io/etcd/client/v3" + "go.etcd.io/etcd/tests/v3/framework/config" + "go.etcd.io/etcd/tests/v3/framework/e2e" +) + +const ( + // in sync with how kubernetes uses etcd + // https://github.com/kubernetes/kubernetes/blob/release-1.28/staging/src/k8s.io/apiserver/pkg/storage/storagebackend/factory/etcd3.go#L59-L71 + keepaliveTime = 30 * time.Second + keepaliveTimeout = 10 * time.Second + dialTimeout = 20 * time.Second + + clientRuntime = 10 * time.Second + failureDetectionLatency = 6 * time.Second + // expect no more than 5 failed requests + failedRequests = 5 +) + +func TestFailover(t *testing.T) { + tcs := []struct { + name string + clusterOptions []e2e.EPClusterOption + failureInjector func(t *testing.T, clus *e2e.EtcdProcessCluster) + failureDetectionLatency time.Duration + }{ + { + name: "network_partition", + clusterOptions: []e2e.EPClusterOption{e2e.WithClusterSize(3), e2e.WithIsPeerTLS(true), e2e.WithPeerProxy(true)}, + failureInjector: blackhole, + failureDetectionLatency: failureDetectionLatency, + }, + { + name: "stalled_disk_write", + clusterOptions: []e2e.EPClusterOption{e2e.WithClusterSize(3), e2e.WithGoFailEnabled(true)}, + failureInjector: blockDiskWrite, + failureDetectionLatency: failureDetectionLatency, + }, + { + name: "defrag", + clusterOptions: []e2e.EPClusterOption{e2e.WithClusterSize(3), e2e.WithGoFailEnabled(true)}, + failureInjector: triggerDefrag, + }, + } + + for _, tc := range tcs { + t.Run(tc.name, func(t *testing.T) { + e2e.BeforeTest(t) + clus, err := e2e.NewEtcdProcessCluster(context.TODO(), t, tc.clusterOptions...) + t.Cleanup(func() { clus.Stop() }) + endpoints := clus.EndpointsGRPC() + + cnt, success := 0, 0 + donec := make(chan struct{}) + errc := make(chan error, 1) + + go func() { + var lastErr error + var cc *clientv3.Client + defer func() { + if cc != nil { + cc.Close() + } + errc <- lastErr + close(donec) + close(errc) + }() + cc, cerr := clientv3.New(clientv3.Config{ + DialTimeout: dialTimeout, + DialKeepAliveTime: keepaliveTime, + DialKeepAliveTimeout: keepaliveTimeout, + Endpoints: endpoints, + DialOptions: []grpc.DialOption{ + grpc.WithDisableServiceConfig(), + grpc.WithDefaultServiceConfig(`{"loadBalancingPolicy": "round_robin", "healthCheckConfig": {"serviceName": ""}}`), + // the following service config will disable grpc client health check + //grpc.WithDefaultServiceConfig(`{"loadBalancingPolicy": "round_robin"}`), + }, + }) + require.NoError(t, cerr) + timeout := time.After(clientRuntime) + + time.Sleep(tc.failureDetectionLatency) + for { + select { + case <-timeout: + return + default: + } + cctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond) + //start := time.Now() + _, err = cc.Get(cctx, "health") + //t.Logf("TS (%s): number #%d health check took %v", time.Now().UTC().Format(time.RFC3339), cnt, time.Since(start)) + cancel() + cnt++ + if err != nil { + lastErr = err + continue + } + success++ + } + }() + + tc.failureInjector(t, clus) + + <-donec + err, ok := <-errc + if ok && err != nil { + t.Logf("etcd client failed to fail over, error (%v)", err) + } + t.Logf("request failure rate is %.2f%%, traffic volume success %d requests, total %d requests", (1-float64(success)/float64(cnt))*100, success, cnt) + // expect no more than 5 failed requests + require.InDelta(t, cnt, success, failedRequests) + }) + } +} + +func blackhole(t *testing.T, clus *e2e.EtcdProcessCluster) { + member := clus.Procs[0] + proxy := member.PeerProxy() + t.Logf("Blackholing traffic from and to member %q", member.Config().Name) + proxy.BlackholeTx() + proxy.BlackholeRx() +} + +func blockDiskWrite(t *testing.T, clus *e2e.EtcdProcessCluster) { + err := clus.Procs[0].Failpoints().Setup(context.Background(), "raftBeforeSave", `sleep(10000)`) + require.NoError(t, err) + clus.Procs[0].Etcdctl().Put(context.Background(), "foo", "bar", config.PutOptions{}) +} + +func triggerDefrag(t *testing.T, clus *e2e.EtcdProcessCluster) { + err := clus.Procs[0].Failpoints().Setup(context.Background(), "defragBeforeCopy", `sleep(8000)`) + require.NoError(t, err) + err = clus.Procs[0].Etcdctl().Defragment(context.Background(), config.DefragOption{Timeout: time.Minute}) + require.NoError(t, err) +}