mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
349 lines
8.2 KiB
Go
349 lines
8.2 KiB
Go
// Copyright 2015 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 main
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import (
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"fmt"
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"math/rand"
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"net"
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"net/http"
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"sync"
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"time"
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clientV2 "github.com/coreos/etcd/client"
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"github.com/coreos/etcd/etcdserver"
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"github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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"golang.org/x/net/context"
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"golang.org/x/time/rate"
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"google.golang.org/grpc"
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"google.golang.org/grpc/grpclog"
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"google.golang.org/grpc/transport"
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)
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func init() {
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grpclog.SetLogger(plog)
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}
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type stressFunc func(ctx context.Context) error
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type stressEntry struct {
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weight float32
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f stressFunc
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}
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type stressTable struct {
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entries []stressEntry
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sumWeights float32
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}
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func createStressTable(entries []stressEntry) *stressTable {
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st := stressTable{entries: entries}
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for _, entry := range st.entries {
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st.sumWeights += entry.weight
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}
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return &st
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}
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func (st *stressTable) choose() stressFunc {
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v := rand.Float32() * st.sumWeights
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var sum float32
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var idx int
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for i := range st.entries {
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sum += st.entries[i].weight
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if sum >= v {
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idx = i
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break
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}
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}
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return st.entries[idx].f
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}
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func newStressPut(kvc pb.KVClient, keySuffixRange, keySize int) stressFunc {
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return func(ctx context.Context) error {
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_, err := kvc.Put(ctx, &pb.PutRequest{
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Key: []byte(fmt.Sprintf("foo%d", rand.Intn(keySuffixRange))),
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Value: randBytes(keySize),
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}, grpc.FailFast(false))
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return err
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}
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}
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func newStressRange(kvc pb.KVClient, keySuffixRange int) stressFunc {
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return func(ctx context.Context) error {
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_, err := kvc.Range(ctx, &pb.RangeRequest{
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Key: []byte(fmt.Sprintf("foo%d", rand.Intn(keySuffixRange))),
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}, grpc.FailFast(false))
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return err
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}
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}
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func newStressRangePrefix(kvc pb.KVClient, keySuffixRange int) stressFunc {
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return func(ctx context.Context) error {
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_, err := kvc.Range(ctx, &pb.RangeRequest{
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Key: []byte("foo"),
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RangeEnd: []byte(fmt.Sprintf("foo%d", rand.Intn(keySuffixRange))),
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}, grpc.FailFast(false))
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return err
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}
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}
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func newStressDelete(kvc pb.KVClient, keySuffixRange int) stressFunc {
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return func(ctx context.Context) error {
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_, err := kvc.DeleteRange(ctx, &pb.DeleteRangeRequest{
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Key: []byte(fmt.Sprintf("foo%d", rand.Intn(keySuffixRange))),
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}, grpc.FailFast(false))
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return err
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}
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}
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func newStressDeletePrefix(kvc pb.KVClient, keySuffixRange int) stressFunc {
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return func(ctx context.Context) error {
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_, err := kvc.DeleteRange(ctx, &pb.DeleteRangeRequest{
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Key: []byte("foo"),
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RangeEnd: []byte(fmt.Sprintf("foo%d", rand.Intn(keySuffixRange))),
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}, grpc.FailFast(false))
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return err
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}
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}
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type Stresser interface {
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// Stress starts to stress the etcd cluster
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Stress() error
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// Cancel cancels the stress test on the etcd cluster
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Cancel()
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// Report reports the success and failure of the stress test
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Report() (success int, failure int)
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}
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type stresser struct {
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Endpoint string
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KeySize int
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KeySuffixRange int
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qps int
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N int
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mu sync.Mutex
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wg *sync.WaitGroup
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rateLimiter *rate.Limiter
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cancel func()
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conn *grpc.ClientConn
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success int
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stressTable *stressTable
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}
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func (s *stresser) Stress() error {
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// TODO: add backoff option
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conn, err := grpc.Dial(s.Endpoint, grpc.WithInsecure())
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if err != nil {
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return fmt.Errorf("%v (%s)", err, s.Endpoint)
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}
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ctx, cancel := context.WithCancel(context.Background())
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wg := &sync.WaitGroup{}
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wg.Add(s.N)
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s.mu.Lock()
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s.conn = conn
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s.cancel = cancel
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s.wg = wg
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s.rateLimiter = rate.NewLimiter(rate.Every(time.Second), s.qps)
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s.mu.Unlock()
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kvc := pb.NewKVClient(conn)
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var stressEntries = []stressEntry{
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{weight: 0.7, f: newStressPut(kvc, s.KeySuffixRange, s.KeySize)},
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{weight: 0.07, f: newStressRange(kvc, s.KeySuffixRange)},
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{weight: 0.07, f: newStressRangePrefix(kvc, s.KeySuffixRange)},
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{weight: 0.07, f: newStressDelete(kvc, s.KeySuffixRange)},
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{weight: 0.07, f: newStressDeletePrefix(kvc, s.KeySuffixRange)},
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}
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s.stressTable = createStressTable(stressEntries)
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for i := 0; i < s.N; i++ {
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go s.run(ctx, kvc)
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}
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plog.Printf("stresser %q is started", s.Endpoint)
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return nil
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}
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func (s *stresser) run(ctx context.Context, kvc pb.KVClient) {
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defer s.wg.Done()
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for {
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if err := s.rateLimiter.Wait(ctx); err == context.Canceled {
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return
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}
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// TODO: 10-second is enough timeout to cover leader failure
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// and immediate leader election. Find out what other cases this
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// could be timed out.
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sctx, scancel := context.WithTimeout(ctx, 10*time.Second)
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err := s.stressTable.choose()(sctx)
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scancel()
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if err != nil {
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shouldContinue := false
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switch grpc.ErrorDesc(err) {
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case context.DeadlineExceeded.Error():
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// This retries when request is triggered at the same time as
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// leader failure. When we terminate the leader, the request to
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// that leader cannot be processed, and times out. Also requests
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// to followers cannot be forwarded to the old leader, so timing out
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// as well. We want to keep stressing until the cluster elects a
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// new leader and start processing requests again.
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shouldContinue = true
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case etcdserver.ErrTimeoutDueToLeaderFail.Error(), etcdserver.ErrTimeout.Error():
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// This retries when request is triggered at the same time as
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// leader failure and follower nodes receive time out errors
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// from losing their leader. Followers should retry to connect
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// to the new leader.
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shouldContinue = true
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case etcdserver.ErrStopped.Error():
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// one of the etcd nodes stopped from failure injection
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shouldContinue = true
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case transport.ErrConnClosing.Desc:
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// server closed the transport (failure injected node)
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shouldContinue = true
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case rpctypes.ErrNotCapable.Error():
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// capability check has not been done (in the beginning)
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shouldContinue = true
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// default:
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// errors from stresser.Cancel method:
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// rpc error: code = 1 desc = context canceled (type grpc.rpcError)
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// rpc error: code = 2 desc = grpc: the client connection is closing (type grpc.rpcError)
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}
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if shouldContinue {
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continue
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}
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return
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}
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s.mu.Lock()
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s.success++
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s.mu.Unlock()
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}
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}
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func (s *stresser) Cancel() {
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s.mu.Lock()
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s.cancel()
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s.conn.Close()
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wg := s.wg
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s.mu.Unlock()
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wg.Wait()
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plog.Printf("stresser %q is canceled", s.Endpoint)
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}
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func (s *stresser) Report() (int, int) {
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s.mu.Lock()
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defer s.mu.Unlock()
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// TODO: find a better way to report v3 tests
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return s.success, -1
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}
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type stresserV2 struct {
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Endpoint string
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KeySize int
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KeySuffixRange int
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N int
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mu sync.Mutex
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failure int
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success int
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cancel func()
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}
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func (s *stresserV2) Stress() error {
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cfg := clientV2.Config{
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Endpoints: []string{s.Endpoint},
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Transport: &http.Transport{
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Dial: (&net.Dialer{
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Timeout: time.Second,
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KeepAlive: 30 * time.Second,
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}).Dial,
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MaxIdleConnsPerHost: s.N,
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},
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}
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c, err := clientV2.New(cfg)
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if err != nil {
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return err
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}
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kv := clientV2.NewKeysAPI(c)
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ctx, cancel := context.WithCancel(context.Background())
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s.cancel = cancel
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for i := 0; i < s.N; i++ {
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go func() {
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for {
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setctx, setcancel := context.WithTimeout(ctx, clientV2.DefaultRequestTimeout)
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key := fmt.Sprintf("foo%d", rand.Intn(s.KeySuffixRange))
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_, err := kv.Set(setctx, key, string(randBytes(s.KeySize)), nil)
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setcancel()
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if err == context.Canceled {
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return
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}
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s.mu.Lock()
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if err != nil {
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s.failure++
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} else {
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s.success++
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}
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s.mu.Unlock()
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}
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}()
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}
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<-ctx.Done()
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return nil
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}
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func (s *stresserV2) Cancel() {
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s.cancel()
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}
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func (s *stresserV2) Report() (success int, failure int) {
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s.mu.Lock()
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defer s.mu.Unlock()
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return s.success, s.failure
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}
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func randBytes(size int) []byte {
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data := make([]byte, size)
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for i := 0; i < size; i++ {
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data[i] = byte(int('a') + rand.Intn(26))
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}
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return data
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}
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