mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
573 lines
21 KiB
Go
573 lines
21 KiB
Go
// Copyright 2022 The etcd 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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package robustness
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import (
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"context"
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"fmt"
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"math/rand"
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"strings"
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"testing"
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"time"
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"go.uber.org/zap"
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healthpb "google.golang.org/grpc/health/grpc_health_v1"
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clientv3 "go.etcd.io/etcd/client/v3"
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"go.etcd.io/etcd/tests/v3/framework/e2e"
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)
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const (
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triggerTimeout = time.Minute
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waitBetweenFailpointTriggers = time.Second
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failpointInjectionsCount = 1
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failpointInjectionsRetries = 3
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)
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var (
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KillFailpoint Failpoint = killFailpoint{}
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DefragBeforeCopyPanic Failpoint = goPanicFailpoint{"defragBeforeCopy", triggerDefrag{}, AnyMember}
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DefragBeforeRenamePanic Failpoint = goPanicFailpoint{"defragBeforeRename", triggerDefrag{}, AnyMember}
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BeforeCommitPanic Failpoint = goPanicFailpoint{"beforeCommit", nil, AnyMember}
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AfterCommitPanic Failpoint = goPanicFailpoint{"afterCommit", nil, AnyMember}
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RaftBeforeSavePanic Failpoint = goPanicFailpoint{"raftBeforeSave", nil, AnyMember}
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RaftAfterSavePanic Failpoint = goPanicFailpoint{"raftAfterSave", nil, AnyMember}
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BackendBeforePreCommitHookPanic Failpoint = goPanicFailpoint{"commitBeforePreCommitHook", nil, AnyMember}
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BackendAfterPreCommitHookPanic Failpoint = goPanicFailpoint{"commitAfterPreCommitHook", nil, AnyMember}
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BackendBeforeStartDBTxnPanic Failpoint = goPanicFailpoint{"beforeStartDBTxn", nil, AnyMember}
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BackendAfterStartDBTxnPanic Failpoint = goPanicFailpoint{"afterStartDBTxn", nil, AnyMember}
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BackendBeforeWritebackBufPanic Failpoint = goPanicFailpoint{"beforeWritebackBuf", nil, AnyMember}
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BackendAfterWritebackBufPanic Failpoint = goPanicFailpoint{"afterWritebackBuf", nil, AnyMember}
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CompactBeforeCommitScheduledCompactPanic Failpoint = goPanicFailpoint{"compactBeforeCommitScheduledCompact", triggerCompact{}, AnyMember}
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CompactAfterCommitScheduledCompactPanic Failpoint = goPanicFailpoint{"compactAfterCommitScheduledCompact", triggerCompact{}, AnyMember}
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CompactBeforeSetFinishedCompactPanic Failpoint = goPanicFailpoint{"compactBeforeSetFinishedCompact", triggerCompact{}, AnyMember}
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CompactAfterSetFinishedCompactPanic Failpoint = goPanicFailpoint{"compactAfterSetFinishedCompact", triggerCompact{}, AnyMember}
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CompactBeforeCommitBatchPanic Failpoint = goPanicFailpoint{"compactBeforeCommitBatch", triggerCompact{multiBatchCompaction: true}, AnyMember}
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CompactAfterCommitBatchPanic Failpoint = goPanicFailpoint{"compactAfterCommitBatch", triggerCompact{multiBatchCompaction: true}, AnyMember}
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RaftBeforeLeaderSendPanic Failpoint = goPanicFailpoint{"raftBeforeLeaderSend", nil, Leader}
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BlackholePeerNetwork Failpoint = blackholePeerNetworkFailpoint{triggerBlackhole{waitTillSnapshot: false}}
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BlackholeUntilSnapshot Failpoint = blackholePeerNetworkFailpoint{triggerBlackhole{waitTillSnapshot: true}}
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DelayPeerNetwork Failpoint = delayPeerNetworkFailpoint{duration: time.Second, baseLatency: 75 * time.Millisecond, randomizedLatency: 50 * time.Millisecond}
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RaftBeforeFollowerSendPanic Failpoint = goPanicFailpoint{"raftBeforeFollowerSend", nil, Follower}
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RaftBeforeApplySnapPanic Failpoint = goPanicFailpoint{"raftBeforeApplySnap", triggerBlackhole{waitTillSnapshot: true}, Follower}
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RaftAfterApplySnapPanic Failpoint = goPanicFailpoint{"raftAfterApplySnap", triggerBlackhole{waitTillSnapshot: true}, Follower}
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RaftAfterWALReleasePanic Failpoint = goPanicFailpoint{"raftAfterWALRelease", triggerBlackhole{waitTillSnapshot: true}, Follower}
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RaftBeforeSaveSnapPanic Failpoint = goPanicFailpoint{"raftBeforeSaveSnap", triggerBlackhole{waitTillSnapshot: true}, Follower}
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RaftAfterSaveSnapPanic Failpoint = goPanicFailpoint{"raftAfterSaveSnap", triggerBlackhole{waitTillSnapshot: true}, Follower}
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beforeApplyOneConfChangeSleep Failpoint = killAndGofailSleep{"beforeApplyOneConfChange", time.Second}
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allFailpoints = []Failpoint{
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KillFailpoint, BeforeCommitPanic, AfterCommitPanic, RaftBeforeSavePanic, RaftAfterSavePanic,
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DefragBeforeCopyPanic, DefragBeforeRenamePanic, BackendBeforePreCommitHookPanic, BackendAfterPreCommitHookPanic,
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BackendBeforeStartDBTxnPanic, BackendAfterStartDBTxnPanic, BackendBeforeWritebackBufPanic,
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BackendAfterWritebackBufPanic, CompactBeforeCommitScheduledCompactPanic, CompactAfterCommitScheduledCompactPanic,
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CompactBeforeSetFinishedCompactPanic, CompactAfterSetFinishedCompactPanic, CompactBeforeCommitBatchPanic,
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CompactAfterCommitBatchPanic, RaftBeforeLeaderSendPanic, BlackholePeerNetwork, DelayPeerNetwork,
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RaftBeforeFollowerSendPanic, RaftBeforeApplySnapPanic, RaftAfterApplySnapPanic, RaftAfterWALReleasePanic,
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RaftBeforeSaveSnapPanic, RaftAfterSaveSnapPanic, BlackholeUntilSnapshot,
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beforeApplyOneConfChangeSleep,
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}
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)
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func pickRandomFailpoint(t *testing.T, clus *e2e.EtcdProcessCluster) Failpoint {
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availableFailpoints := make([]Failpoint, 0, len(allFailpoints))
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for _, failpoint := range allFailpoints {
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err := validateFailpoint(clus, failpoint)
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if err != nil {
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continue
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}
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availableFailpoints = append(availableFailpoints, failpoint)
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}
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if len(availableFailpoints) == 0 {
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t.Errorf("No available failpoints")
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return nil
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}
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return availableFailpoints[rand.Int()%len(availableFailpoints)]
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}
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func validateFailpoint(clus *e2e.EtcdProcessCluster, failpoint Failpoint) error {
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for _, proc := range clus.Procs {
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if !failpoint.Available(*clus.Cfg, proc) {
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return fmt.Errorf("failpoint %q not available on %s", failpoint.Name(), proc.Config().Name)
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}
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}
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return nil
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}
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func injectFailpoints(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster, failpoint Failpoint) {
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ctx, cancel := context.WithTimeout(ctx, triggerTimeout)
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defer cancel()
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var err error
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successes := 0
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failures := 0
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for successes < failpointInjectionsCount && failures < failpointInjectionsRetries {
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time.Sleep(waitBetweenFailpointTriggers)
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lg.Info("Verifying cluster health before failpoint", zap.String("failpoint", failpoint.Name()))
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if err = verifyClusterHealth(ctx, t, clus); err != nil {
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t.Errorf("failed to verify cluster health before failpoint injection, err: %v", err)
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return
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}
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lg.Info("Triggering failpoint", zap.String("failpoint", failpoint.Name()))
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err = failpoint.Inject(ctx, t, lg, clus)
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if err != nil {
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select {
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case <-ctx.Done():
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t.Errorf("Triggering failpoints timed out, err: %v", ctx.Err())
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return
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default:
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}
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lg.Info("Failed to trigger failpoint", zap.String("failpoint", failpoint.Name()), zap.Error(err))
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failures++
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continue
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}
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lg.Info("Verifying cluster health after failpoint", zap.String("failpoint", failpoint.Name()))
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if err = verifyClusterHealth(ctx, t, clus); err != nil {
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t.Errorf("failed to verify cluster health after failpoint injection, err: %v", err)
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return
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}
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successes++
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}
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if successes < failpointInjectionsCount || failures >= failpointInjectionsRetries {
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t.Errorf("failed to trigger failpoints enough times, err: %v", err)
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}
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return
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}
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func verifyClusterHealth(ctx context.Context, t *testing.T, clus *e2e.EtcdProcessCluster) error {
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for i := 0; i < len(clus.Procs); i++ {
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clusterClient, err := clientv3.New(clientv3.Config{
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Endpoints: clus.Procs[i].EndpointsGRPC(),
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Logger: zap.NewNop(),
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DialKeepAliveTime: 10 * time.Second,
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DialKeepAliveTimeout: 100 * time.Millisecond,
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})
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if err != nil {
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return fmt.Errorf("Error creating client for cluster %s: %v", clus.Procs[i].Config().Name, err)
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}
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defer clusterClient.Close()
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cli := healthpb.NewHealthClient(clusterClient.ActiveConnection())
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resp, err := cli.Check(ctx, &healthpb.HealthCheckRequest{})
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if err != nil {
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return fmt.Errorf("Error checking member %s health: %v", clus.Procs[i].Config().Name, err)
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}
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if resp.Status != healthpb.HealthCheckResponse_SERVING {
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return fmt.Errorf("Member %s health status expected %s, got %s",
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clus.Procs[i].Config().Name,
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healthpb.HealthCheckResponse_SERVING,
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resp.Status)
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}
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}
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return nil
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}
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type Failpoint interface {
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Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error
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Name() string
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AvailabilityChecker
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}
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type AvailabilityChecker interface {
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Available(e2e.EtcdProcessClusterConfig, e2e.EtcdProcess) bool
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}
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type killFailpoint struct{}
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func (f killFailpoint) Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error {
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member := clus.Procs[rand.Int()%len(clus.Procs)]
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for member.IsRunning() {
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err := member.Kill()
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if err != nil {
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lg.Info("Sending kill signal failed", zap.Error(err))
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}
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err = member.Wait(ctx)
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if err != nil && !strings.Contains(err.Error(), "unexpected exit code") {
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lg.Info("Failed to kill the process", zap.Error(err))
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return fmt.Errorf("failed to kill the process within %s, err: %w", triggerTimeout, err)
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}
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}
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if lazyfs := member.LazyFS(); lazyfs != nil {
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lg.Info("Removing data that was not fsynced")
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err := lazyfs.ClearCache(ctx)
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if err != nil {
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return err
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}
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}
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err := member.Start(ctx)
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if err != nil {
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return err
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}
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return nil
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}
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func (f killFailpoint) Name() string {
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return "Kill"
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}
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func (f killFailpoint) Available(e2e.EtcdProcessClusterConfig, e2e.EtcdProcess) bool {
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return true
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}
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type goPanicFailpoint struct {
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failpoint string
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trigger trigger
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target failpointTarget
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}
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type trigger interface {
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Trigger(ctx context.Context, t *testing.T, member e2e.EtcdProcess, clus *e2e.EtcdProcessCluster) error
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AvailabilityChecker
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}
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type failpointTarget string
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const (
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AnyMember failpointTarget = "AnyMember"
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Leader failpointTarget = "Leader"
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Follower failpointTarget = "Follower"
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)
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func (f goPanicFailpoint) Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error {
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member := f.pickMember(t, clus)
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for member.IsRunning() {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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}
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lg.Info("Setting up gofailpoint", zap.String("failpoint", f.Name()))
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err := member.Failpoints().SetupHTTP(ctx, f.failpoint, "panic")
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if err != nil {
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lg.Info("goFailpoint setup failed", zap.String("failpoint", f.Name()), zap.Error(err))
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continue
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}
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if !member.IsRunning() {
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// TODO: Check member logs that etcd not running is caused panic caused by proper gofailpoint.
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break
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}
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if f.trigger != nil {
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lg.Info("Triggering gofailpoint", zap.String("failpoint", f.Name()))
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err = f.trigger.Trigger(ctx, t, member, clus)
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if err != nil {
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lg.Info("gofailpoint trigger failed", zap.String("failpoint", f.Name()), zap.Error(err))
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}
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}
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lg.Info("Waiting for member to exit", zap.String("member", member.Config().Name))
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err = member.Wait(ctx)
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if err != nil && !strings.Contains(err.Error(), "unexpected exit code") {
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lg.Info("Member didn't exit as expected", zap.String("member", member.Config().Name), zap.Error(err))
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return fmt.Errorf("member didn't exit as expected: %v", err)
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}
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lg.Info("Member exited as expected", zap.String("member", member.Config().Name))
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}
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if lazyfs := member.LazyFS(); lazyfs != nil {
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lg.Info("Removing data that was not fsynced")
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err := lazyfs.ClearCache(ctx)
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if err != nil {
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return err
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}
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}
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return member.Start(ctx)
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}
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func (f goPanicFailpoint) pickMember(t *testing.T, clus *e2e.EtcdProcessCluster) e2e.EtcdProcess {
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switch f.target {
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case AnyMember:
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return clus.Procs[rand.Int()%len(clus.Procs)]
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case Leader:
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return clus.Procs[clus.WaitLeader(t)]
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case Follower:
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return clus.Procs[(clus.WaitLeader(t)+1)%len(clus.Procs)]
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default:
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panic("unknown target")
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}
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}
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func (f goPanicFailpoint) Available(config e2e.EtcdProcessClusterConfig, member e2e.EtcdProcess) bool {
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if f.target == Follower && config.ClusterSize == 1 {
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return false
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}
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if f.trigger != nil && !f.trigger.Available(config, member) {
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return false
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}
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memberFailpoints := member.Failpoints()
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if memberFailpoints == nil {
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return false
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}
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return memberFailpoints.Available(f.failpoint)
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}
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func (f goPanicFailpoint) Name() string {
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return fmt.Sprintf("%s=panic()", f.failpoint)
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}
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type triggerDefrag struct{}
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func (t triggerDefrag) Trigger(ctx context.Context, _ *testing.T, member e2e.EtcdProcess, _ *e2e.EtcdProcessCluster) error {
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cc, err := clientv3.New(clientv3.Config{
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Endpoints: member.EndpointsGRPC(),
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Logger: zap.NewNop(),
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DialKeepAliveTime: 10 * time.Second,
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DialKeepAliveTimeout: 100 * time.Millisecond,
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})
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if err != nil {
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return fmt.Errorf("failed creating client: %w", err)
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}
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defer cc.Close()
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_, err = cc.Defragment(ctx, member.EndpointsGRPC()[0])
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if err != nil && !strings.Contains(err.Error(), "error reading from server: EOF") {
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return err
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}
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return nil
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}
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func (t triggerDefrag) Available(e2e.EtcdProcessClusterConfig, e2e.EtcdProcess) bool {
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return true
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}
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type triggerCompact struct {
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multiBatchCompaction bool
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}
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func (t triggerCompact) Trigger(ctx context.Context, _ *testing.T, member e2e.EtcdProcess, clus *e2e.EtcdProcessCluster) error {
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cc, err := clientv3.New(clientv3.Config{
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Endpoints: member.EndpointsGRPC(),
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Logger: zap.NewNop(),
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DialKeepAliveTime: 10 * time.Second,
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DialKeepAliveTimeout: 100 * time.Millisecond,
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})
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if err != nil {
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return fmt.Errorf("failed creating client: %w", err)
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}
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defer cc.Close()
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var rev int64
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for {
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resp, gerr := cc.Get(ctx, "/")
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if gerr != nil {
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return gerr
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}
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rev = resp.Header.Revision
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if !t.multiBatchCompaction || rev > int64(clus.Cfg.ServerConfig.ExperimentalCompactionBatchLimit) {
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break
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}
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time.Sleep(50 * time.Millisecond)
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}
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_, err = cc.Compact(ctx, rev)
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if err != nil && !strings.Contains(err.Error(), "error reading from server: EOF") {
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return err
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}
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return nil
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}
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func (t triggerCompact) Available(e2e.EtcdProcessClusterConfig, e2e.EtcdProcess) bool {
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return true
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}
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type blackholePeerNetworkFailpoint struct {
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triggerBlackhole
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}
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func (f blackholePeerNetworkFailpoint) Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error {
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member := clus.Procs[rand.Int()%len(clus.Procs)]
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return f.Trigger(ctx, t, member, clus)
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}
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func (f blackholePeerNetworkFailpoint) Name() string {
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return "blackhole"
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}
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type triggerBlackhole struct {
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waitTillSnapshot bool
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}
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func (tb triggerBlackhole) Trigger(ctx context.Context, t *testing.T, member e2e.EtcdProcess, clus *e2e.EtcdProcessCluster) error {
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return blackhole(ctx, t, member, clus, tb.waitTillSnapshot)
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}
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func (tb triggerBlackhole) Available(config e2e.EtcdProcessClusterConfig, process e2e.EtcdProcess) bool {
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if tb.waitTillSnapshot && config.ServerConfig.SnapshotCatchUpEntries > 100 {
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return false
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}
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return config.ClusterSize > 1 && process.PeerProxy() != nil
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}
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func blackhole(ctx context.Context, t *testing.T, member e2e.EtcdProcess, clus *e2e.EtcdProcessCluster, shouldWaitTillSnapshot bool) error {
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proxy := member.PeerProxy()
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// Blackholing will cause peers to not be able to use streamWriters registered with member
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// but peer traffic is still possible because member has 'pipeline' with peers
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// TODO: find a way to stop all traffic
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t.Logf("Blackholing traffic from and to member %q", member.Config().Name)
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proxy.BlackholeTx()
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proxy.BlackholeRx()
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defer func() {
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t.Logf("Traffic restored from and to member %q", member.Config().Name)
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proxy.UnblackholeTx()
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proxy.UnblackholeRx()
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}()
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if shouldWaitTillSnapshot {
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return waitTillSnapshot(ctx, t, clus, member)
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}
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time.Sleep(time.Second)
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return nil
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}
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func waitTillSnapshot(ctx context.Context, t *testing.T, clus *e2e.EtcdProcessCluster, blackholedMember e2e.EtcdProcess) error {
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var endpoints []string
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for _, ep := range clus.EndpointsGRPC() {
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if ep == blackholedMember.Config().ClientURL {
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continue
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}
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endpoints = append(endpoints, ep)
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}
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clusterClient, err := clientv3.New(clientv3.Config{
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Endpoints: endpoints,
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Logger: zap.NewNop(),
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DialKeepAliveTime: 10 * time.Second,
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DialKeepAliveTimeout: 100 * time.Millisecond,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer clusterClient.Close()
|
|
|
|
blackholedMemberClient, err := clientv3.New(clientv3.Config{
|
|
Endpoints: []string{blackholedMember.Config().ClientURL},
|
|
Logger: zap.NewNop(),
|
|
DialKeepAliveTime: 10 * time.Second,
|
|
DialKeepAliveTimeout: 100 * time.Millisecond,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer blackholedMemberClient.Close()
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
}
|
|
// Have to refresh blackholedMemberRevision. It can still increase as blackholedMember processes changes that are received but not yet applied.
|
|
blackholedMemberRevision, err := latestRevisionForEndpoint(ctx, blackholedMemberClient)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
clusterRevision, err := latestRevisionForEndpoint(ctx, clusterClient)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
t.Logf("clusterRevision: %d, blackholedMemberRevision: %d", clusterRevision, blackholedMemberRevision)
|
|
// Blackholed member has to be sufficiently behind to trigger snapshot transfer.
|
|
// Need to make sure leader compacted latest revBlackholedMem inside EtcdServer.snapshot.
|
|
// That's why we wait for clus.Cfg.SnapshotCount (to trigger snapshot) + clus.Cfg.SnapshotCatchUpEntries (EtcdServer.snapshot compaction offset)
|
|
if clusterRevision-blackholedMemberRevision > int64(clus.Cfg.ServerConfig.SnapshotCount+clus.Cfg.ServerConfig.SnapshotCatchUpEntries) {
|
|
break
|
|
}
|
|
time.Sleep(100 * time.Millisecond)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// latestRevisionForEndpoint gets latest revision of the first endpoint in Client.Endpoints list
|
|
func latestRevisionForEndpoint(ctx context.Context, c *clientv3.Client) (int64, error) {
|
|
resp, err := c.Status(ctx, c.Endpoints()[0])
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return resp.Header.Revision, err
|
|
}
|
|
|
|
type delayPeerNetworkFailpoint struct {
|
|
duration time.Duration
|
|
baseLatency time.Duration
|
|
randomizedLatency time.Duration
|
|
}
|
|
|
|
func (f delayPeerNetworkFailpoint) Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error {
|
|
member := clus.Procs[rand.Int()%len(clus.Procs)]
|
|
proxy := member.PeerProxy()
|
|
|
|
proxy.DelayRx(f.baseLatency, f.randomizedLatency)
|
|
proxy.DelayTx(f.baseLatency, f.randomizedLatency)
|
|
lg.Info("Delaying traffic from and to member", zap.String("member", member.Config().Name), zap.Duration("baseLatency", f.baseLatency), zap.Duration("randomizedLatency", f.randomizedLatency))
|
|
time.Sleep(f.duration)
|
|
lg.Info("Traffic delay removed", zap.String("member", member.Config().Name))
|
|
proxy.UndelayRx()
|
|
proxy.UndelayTx()
|
|
return nil
|
|
}
|
|
|
|
func (f delayPeerNetworkFailpoint) Name() string {
|
|
return "delay"
|
|
}
|
|
|
|
func (f delayPeerNetworkFailpoint) Available(config e2e.EtcdProcessClusterConfig, clus e2e.EtcdProcess) bool {
|
|
return config.ClusterSize > 1 && clus.PeerProxy() != nil
|
|
}
|
|
|
|
type killAndGofailSleep struct {
|
|
failpoint string
|
|
time time.Duration
|
|
}
|
|
|
|
func (f killAndGofailSleep) Inject(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2e.EtcdProcessCluster) error {
|
|
member := clus.Procs[rand.Int()%len(clus.Procs)]
|
|
for member.IsRunning() {
|
|
err := member.Kill()
|
|
if err != nil {
|
|
lg.Info("Sending kill signal failed", zap.Error(err))
|
|
}
|
|
err = member.Wait(ctx)
|
|
if err != nil && !strings.Contains(err.Error(), "unexpected exit code") {
|
|
lg.Info("Failed to kill the process", zap.Error(err))
|
|
return fmt.Errorf("failed to kill the process within %s, err: %w", triggerTimeout, err)
|
|
}
|
|
}
|
|
lg.Info("Setting up goFailpoint", zap.String("failpoint", f.Name()))
|
|
err := member.Failpoints().SetupEnv(f.failpoint, fmt.Sprintf(`sleep(%q)`, f.time))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = member.Start(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// TODO: Check gofail status (https://github.com/etcd-io/gofail/pull/47) and wait for sleep to beis executed at least once.
|
|
return nil
|
|
}
|
|
|
|
func (f killAndGofailSleep) Name() string {
|
|
return fmt.Sprintf("%s=sleep(%s)", f.failpoint, f.time)
|
|
}
|
|
|
|
func (f killAndGofailSleep) Available(config e2e.EtcdProcessClusterConfig, member e2e.EtcdProcess) bool {
|
|
memberFailpoints := member.Failpoints()
|
|
if memberFailpoints == nil {
|
|
return false
|
|
}
|
|
return memberFailpoints.Available(f.failpoint)
|
|
}
|