forked from etcd-io/etcd
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Signed-off-by: Chao Chen <[email protected]>
- Loading branch information
Showing
5 changed files
with
310 additions
and
6 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| // 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. | ||
|
|
||
| package v3rpc | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "go.etcd.io/raft/v3" | ||
| "go.uber.org/zap" | ||
| "google.golang.org/grpc/health" | ||
| healthpb "google.golang.org/grpc/health/grpc_health_v1" | ||
|
|
||
| "go.etcd.io/etcd/api/v3/etcdserverpb" | ||
| "go.etcd.io/etcd/client/pkg/v3/types" | ||
| "go.etcd.io/etcd/server/v3/auth" | ||
| "go.etcd.io/etcd/server/v3/etcdserver" | ||
| ) | ||
|
|
||
| type healthNotifier interface { | ||
| StartServe() | ||
| StopServe(reason string) | ||
| } | ||
|
|
||
| type healthChecker struct { | ||
| hs *health.Server | ||
| served bool | ||
|
|
||
| // implements readyz prober | ||
| s *etcdserver.EtcdServer | ||
| // prober configuration TODO 2023-09-13 externalize as etcd server flag | ||
| successThreshold int | ||
| failureThreshold int | ||
| healthCheckInterval time.Duration | ||
| // prober state | ||
| successCount int | ||
| failureCount int | ||
| } | ||
|
|
||
| func NewHealthChecker(hs *health.Server, s *etcdserver.EtcdServer) healthNotifier { | ||
| hc := &healthChecker{hs: hs, s: s, successThreshold: 2, failureThreshold: 3, healthCheckInterval: 100 * time.Millisecond} | ||
| // set grpc health server as serving status blindly since | ||
| // the grpc server will serve iff s.ReadyNotify() is closed. | ||
| hc.StartServe() | ||
|
|
||
| go hc.startProbe() | ||
| return hc | ||
| } | ||
|
|
||
| func (hc *healthChecker) StartServe() { | ||
| if hc.hs != nil { | ||
| if hc.s.Logger() != nil { | ||
| hc.s.Logger().Info("start serving gRPC requests from client") | ||
| } | ||
| hc.hs.SetServingStatus("", healthpb.HealthCheckResponse_SERVING) | ||
| hc.served = true | ||
| } | ||
| } | ||
|
|
||
| func (hc *healthChecker) StopServe(reason string) { | ||
| if hc.hs != nil { | ||
| if hc.s.Logger() != nil { | ||
| hc.s.Logger().Warn("stop serving gRPC requests from client", zap.String("reason", reason)) | ||
| } | ||
| hc.hs.SetServingStatus("", healthpb.HealthCheckResponse_NOT_SERVING) | ||
| hc.served = false | ||
| } | ||
| } | ||
|
|
||
| func (hc *healthChecker) startProbe() { | ||
| // stop probing if there is no consumer. | ||
| if hc.hs == nil { | ||
| return | ||
| } | ||
|
|
||
| ticker := time.NewTicker(hc.healthCheckInterval) | ||
| defer ticker.Stop() | ||
| for { | ||
| select { | ||
| case <-hc.s.StoppingNotify(): | ||
| return | ||
| case <-ticker.C: | ||
| if ready, notReadyReason := checkReadyz(hc.s, 2*time.Second); ready { | ||
| hc.successCount += 1 | ||
| hc.failureCount = 0 | ||
| if hc.successCount >= hc.successThreshold && !hc.served { | ||
| hc.StartServe() | ||
| } | ||
| } else { | ||
| hc.failureCount += 1 | ||
| hc.successCount = 0 | ||
| hc.s.Logger().Warn("readyz check failed", zap.Int("failure-count", hc.failureCount)) | ||
| if hc.failureCount >= hc.failureThreshold && hc.served { | ||
| hc.StopServe(notReadyReason) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // checkReadyz prober implementation should be in sync with readyz design in the future. | ||
| // https://docs.google.com/document/d/1109lUxD326yRwmMVX-tkJMpm8pTbOw7MD1XsSIo37MU | ||
| // it is now in sync with etcdhttp.HandleHealth implementation | ||
| // 1. checkLeader | ||
| // 2. checkAlarms | ||
| // 3. checkQuorumRead | ||
| func checkReadyz(s *etcdserver.EtcdServer, timeout time.Duration) (ready bool, notReadyReason string) { | ||
| if s.Leader() == types.ID(raft.None) { | ||
| return false, "local member does not have leader" | ||
| } | ||
| for _, alarm := range s.Alarms() { | ||
| if types.ID(alarm.MemberID) == s.MemberId() && alarm.Alarm == etcdserverpb.AlarmType_CORRUPT { | ||
| return false, "local member has corrupt alarm" | ||
| } | ||
| } | ||
| ctx, cancel := context.WithTimeout(context.Background(), timeout) | ||
| // range requests will only be timed-out in the LinearizableReadNotify phase, and | ||
| // blocking in the mvcc phase in case of defrag. | ||
| // However, use solely LinearizableReadNotify to indicate readyz will produce false positive serving status when defrag is active. | ||
| _, err := s.Range(ctx, &etcdserverpb.RangeRequest{KeysOnly: true, Limit: 1}) | ||
| cancel() | ||
| if err != nil && err != auth.ErrUserEmpty && err != auth.ErrPermissionDenied { | ||
| return false, fmt.Sprintf("local member quorum read with %s timeout failed due to %v", timeout.String(), err) | ||
| } | ||
| return true, "" | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| // 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. | ||
|
|
||
| package e2e | ||
|
|
||
| import ( | ||
| "context" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| "google.golang.org/grpc" | ||
|
|
||
| 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) | ||
| } |