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tester.go
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tester.go
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// Copyright 2015 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 main
import (
"fmt"
"time"
)
type tester struct {
failures []failure
cluster *cluster
limit int
consistencyCheck bool
status Status
currentRevision int64
}
// compactQPS is rough number of compact requests per second.
// Previous tests showed etcd can compact about 60,000 entries per second.
const compactQPS = 50000
func (tt *tester) runLoop() {
tt.status.Since = time.Now()
tt.status.RoundLimit = tt.limit
tt.status.cluster = tt.cluster
for _, f := range tt.failures {
tt.status.Failures = append(tt.status.Failures, f.Desc())
}
var (
round int
prevCompactRev int64
)
for {
tt.status.setRound(round)
tt.status.setCase(-1) // -1 so that logPrefix doesn't print out 'case'
roundTotalCounter.Inc()
var failed bool
for j, f := range tt.failures {
caseTotalCounter.WithLabelValues(f.Desc()).Inc()
tt.status.setCase(j)
if err := tt.cluster.WaitHealth(); err != nil {
plog.Printf("%s wait full health error: %v", tt.logPrefix(), err)
if err := tt.cleanup(); err != nil {
return
}
failed = true
break
}
plog.Printf("%s injecting failure %q", tt.logPrefix(), f.Desc())
if err := f.Inject(tt.cluster, round); err != nil {
plog.Printf("%s injection error: %v", tt.logPrefix(), err)
if err := tt.cleanup(); err != nil {
return
}
failed = true
break
}
plog.Printf("%s injected failure", tt.logPrefix())
plog.Printf("%s recovering failure %q", tt.logPrefix(), f.Desc())
if err := f.Recover(tt.cluster, round); err != nil {
plog.Printf("%s recovery error: %v", tt.logPrefix(), err)
if err := tt.cleanup(); err != nil {
return
}
failed = true
break
}
plog.Printf("%s recovered failure", tt.logPrefix())
if tt.cluster.v2Only {
plog.Printf("%s succeed!", tt.logPrefix())
continue
}
if !tt.consistencyCheck {
if err := tt.updateRevision(); err != nil {
plog.Warningf("%s functional-tester returning with tt.updateRevision error (%v)", tt.logPrefix(), err)
return
}
continue
}
var err error
failed, err = tt.checkConsistency()
if err != nil {
plog.Warningf("%s functional-tester returning with tt.checkConsistency error (%v)", tt.logPrefix(), err)
return
}
if failed {
break
}
plog.Printf("%s succeed!", tt.logPrefix())
}
// -1 so that logPrefix doesn't print out 'case'
tt.status.setCase(-1)
if failed {
continue
}
revToCompact := max(0, tt.currentRevision-10000)
compactN := revToCompact - prevCompactRev
timeout := 10 * time.Second
if prevCompactRev != 0 && compactN > 0 {
timeout += time.Duration(compactN/compactQPS) * time.Second
}
prevCompactRev = revToCompact
plog.Printf("%s compacting %d entries (timeout %v)", tt.logPrefix(), compactN, timeout)
if err := tt.compact(revToCompact, timeout); err != nil {
plog.Warningf("%s functional-tester compact got error (%v)", tt.logPrefix(), err)
if err := tt.cleanup(); err != nil {
return
}
}
if round > 0 && round%500 == 0 { // every 500 rounds
if err := tt.defrag(); err != nil {
plog.Warningf("%s functional-tester returning with error (%v)", tt.logPrefix(), err)
return
}
}
round++
if round == tt.limit {
plog.Printf("%s functional-tester is finished", tt.logPrefix())
break
}
}
}
func (tt *tester) updateRevision() error {
revs, _, err := tt.cluster.getRevisionHash()
for _, rev := range revs {
tt.currentRevision = rev
break // just need get one of the current revisions
}
return err
}
func (tt *tester) checkConsistency() (failed bool, err error) {
tt.cancelStressers()
defer tt.startStressers()
plog.Printf("%s updating current revisions...", tt.logPrefix())
var (
revs map[string]int64
hashes map[string]int64
rerr error
ok bool
)
for i := 0; i < 7; i++ {
time.Sleep(time.Second)
revs, hashes, rerr = tt.cluster.getRevisionHash()
if rerr != nil {
plog.Printf("%s #%d failed to get current revisions (%v)", tt.logPrefix(), i, rerr)
continue
}
if tt.currentRevision, ok = getSameValue(revs); ok {
break
}
plog.Printf("%s #%d inconsistent current revisions %+v", tt.logPrefix(), i, revs)
}
plog.Printf("%s updated current revisions with %d", tt.logPrefix(), tt.currentRevision)
if !ok || rerr != nil {
plog.Printf("%s checking current revisions failed [revisions: %v]", tt.logPrefix(), revs)
failed = true
err = tt.cleanup()
return
}
plog.Printf("%s all members are consistent with current revisions [revisions: %v]", tt.logPrefix(), revs)
plog.Printf("%s checking current storage hashes...", tt.logPrefix())
if _, ok = getSameValue(hashes); !ok {
plog.Printf("%s checking current storage hashes failed [hashes: %v]", tt.logPrefix(), hashes)
failed = true
err = tt.cleanup()
return
}
plog.Printf("%s all members are consistent with storage hashes", tt.logPrefix())
return
}
func (tt *tester) compact(rev int64, timeout time.Duration) error {
plog.Printf("%s compacting storage (current revision %d, compact revision %d)", tt.logPrefix(), tt.currentRevision, rev)
if err := tt.cluster.compactKV(rev, timeout); err != nil {
return err
}
plog.Printf("%s compacted storage (compact revision %d)", tt.logPrefix(), rev)
plog.Printf("%s checking compaction (compact revision %d)", tt.logPrefix(), rev)
if err := tt.cluster.checkCompact(rev); err != nil {
plog.Warningf("%s checkCompact error (%v)", tt.logPrefix(), err)
return err
}
plog.Printf("%s confirmed compaction (compact revision %d)", tt.logPrefix(), rev)
return nil
}
func (tt *tester) defrag() error {
plog.Printf("%s defragmenting...", tt.logPrefix())
if err := tt.cluster.defrag(); err != nil {
plog.Warningf("%s defrag error (%v)", tt.logPrefix(), err)
if cerr := tt.cleanup(); cerr != nil {
return fmt.Errorf("%s, %s", err, cerr)
}
return err
}
plog.Printf("%s defragmented...", tt.logPrefix())
return nil
}
func (tt *tester) logPrefix() string {
var (
rd = tt.status.getRound()
cs = tt.status.getCase()
prefix = fmt.Sprintf("[round#%d case#%d]", rd, cs)
)
if cs == -1 {
prefix = fmt.Sprintf("[round#%d]", rd)
}
return prefix
}
func (tt *tester) cleanup() error {
roundFailedTotalCounter.Inc()
desc := "compact/defrag"
if tt.status.Case != -1 {
desc = tt.failures[tt.status.Case].Desc()
}
caseFailedTotalCounter.WithLabelValues(desc).Inc()
plog.Printf("%s cleaning up...", tt.logPrefix())
if err := tt.cluster.Cleanup(); err != nil {
plog.Warningf("%s cleanup error: %v", tt.logPrefix(), err)
return err
}
if err := tt.cluster.Bootstrap(); err != nil {
plog.Warningf("%s cleanup Bootstrap error: %v", tt.logPrefix(), err)
return err
}
return nil
}
func (tt *tester) cancelStressers() {
plog.Printf("%s canceling the stressers...", tt.logPrefix())
for _, s := range tt.cluster.Stressers {
s.Cancel()
}
plog.Printf("%s canceled stressers", tt.logPrefix())
}
func (tt *tester) startStressers() {
plog.Printf("%s starting the stressers...", tt.logPrefix())
for _, s := range tt.cluster.Stressers {
go s.Stress()
}
plog.Printf("%s started stressers", tt.logPrefix())
}