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Add compaction regression tests.
This adds regression tests that catch the two error cases reported in https://github.com/prometheus/prometheus/issues/367 It also adds a commented-out test case for the crash in https://github.com/prometheus/prometheus/issues/368 but there's no fix for the latter crash yet. Change-Id: Idffefea4ed7cc281caae660bcad2e3c13ec3bd17
This commit is contained in:
Julius Volz
parent
b5f6e3c90c
commit
6ea22f2bf9
244
storage/metric/compaction_regression_test.go
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244
storage/metric/compaction_regression_test.go
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// Copyright 2013 Prometheus Team
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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 metric
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import (
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"fmt"
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"testing"
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"flag"
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"time"
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"github.com/prometheus/prometheus/storage"
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clientmodel "github.com/prometheus/client_golang/model"
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)
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type nopCurationStateUpdater struct{}
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func (n *nopCurationStateUpdater) UpdateCurationState(*CurationState) {}
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func generateTestSamples(endTime time.Time, numTs int, samplesPerTs int, interval time.Duration) clientmodel.Samples {
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samples := clientmodel.Samples{}
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startTime := endTime.Add(-interval * time.Duration(samplesPerTs-1))
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for ts := 0; ts < numTs; ts++ {
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metric := clientmodel.Metric{}
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metric["name"] = clientmodel.LabelValue(fmt.Sprintf("metric_%d", ts))
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for i := 0; i < samplesPerTs; i++ {
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sample := &clientmodel.Sample{
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Metric: metric,
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Value: clientmodel.SampleValue(ts + 1000 * i),
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Timestamp: startTime.Add(interval * time.Duration(i)),
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}
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samples = append(samples, sample)
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}
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}
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return samples
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}
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type compactionChecker struct {
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t *testing.T
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sampleIdx int
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numChunks int
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expectedSamples clientmodel.Samples
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}
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func (c *compactionChecker) Operate(key, value interface{}) *storage.OperatorError {
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c.numChunks++
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sampleKey := key.(*SampleKey)
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if sampleKey.FirstTimestamp.After(sampleKey.LastTimestamp) {
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c.t.Fatalf("Chunk FirstTimestamp (%v) is after LastTimestamp (%v): %v\n", sampleKey.FirstTimestamp.Unix(), sampleKey.LastTimestamp.Unix(), sampleKey)
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}
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for _, sample := range value.(Values) {
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if sample.Timestamp.Before(sampleKey.FirstTimestamp) || sample.Timestamp.After(sampleKey.LastTimestamp) {
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c.t.Fatalf("Sample not within chunk boundaries: chunk FirstTimestamp (%v), chunk LastTimestamp (%v) vs. sample Timestamp (%v)\n", sampleKey.FirstTimestamp.Unix(), sampleKey.LastTimestamp.Unix(), sample.Timestamp)
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}
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expected := c.expectedSamples[c.sampleIdx]
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fp := &clientmodel.Fingerprint{}
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fp.LoadFromMetric(expected.Metric)
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if !sampleKey.Fingerprint.Equal(fp) {
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c.t.Fatalf("%d. Expected fingerprint %s, got %s", c.sampleIdx, fp, sampleKey.Fingerprint)
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}
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sp := &SamplePair{
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Value: expected.Value,
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Timestamp: expected.Timestamp,
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}
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if !sample.Equal(sp) {
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c.t.Fatalf("%d. Expected sample %s, got %s", c.sampleIdx, sp, sample)
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}
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c.sampleIdx++
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}
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return nil
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}
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func checkStorageSaneAndEquivalent(t *testing.T, name string, ts *TieredStorage, samples clientmodel.Samples, expectedNumChunks int) {
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cc := &compactionChecker{
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expectedSamples: samples,
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t: t,
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}
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entire, err := ts.DiskStorage.MetricSamples.ForEach(&MetricSamplesDecoder{}, &AcceptAllFilter{}, cc)
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if err != nil {
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t.Fatalf("%s: Error dumping samples: %s", name, err)
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}
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if !entire {
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t.Fatalf("%s: Didn't scan entire corpus", name)
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}
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if cc.numChunks != expectedNumChunks {
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t.Fatalf("%s: Expected %d chunks, got %d", name, expectedNumChunks, cc.numChunks)
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}
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}
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type compactionTestScenario struct {
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leveldbChunkSize int
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numTimeseries int
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samplesPerTs int
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ignoreYoungerThan time.Duration
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maximumMutationPoolBatch int
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minimumGroupSize int
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uncompactedChunks int
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compactedChunks int
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}
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func (s compactionTestScenario) run(t *testing.T) {
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flag.Set("leveldbChunkSize", fmt.Sprintf("%d", s.leveldbChunkSize))
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defer flag.Set("leveldbChunkSize", "200")
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ts, closer := NewTestTieredStorage(t)
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defer closer.Close()
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// 1. Store test values.
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samples := generateTestSamples(testInstant, s.numTimeseries, s.samplesPerTs, time.Minute)
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ts.AppendSamples(samples)
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ts.Flush()
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// 2. Check sanity of uncompacted values.
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checkStorageSaneAndEquivalent(t, "Before compaction", ts, samples, s.uncompactedChunks)
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// 3. Compact test storage.
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processor := NewCompactionProcessor(&CompactionProcessorOptions{
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MaximumMutationPoolBatch: s.maximumMutationPoolBatch,
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MinimumGroupSize: s.minimumGroupSize,
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})
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defer processor.Close()
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curator := NewCurator(&CuratorOptions{
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Stop: make(chan bool),
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ViewQueue: ts.ViewQueue,
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})
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defer curator.Close()
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fmt.Println("test instant:", testInstant)
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err := curator.Run(s.ignoreYoungerThan, testInstant, processor, ts.DiskStorage.CurationRemarks, ts.DiskStorage.MetricSamples, ts.DiskStorage.MetricHighWatermarks, &nopCurationStateUpdater{})
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if err != nil {
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t.Fatalf("Failed to run curator: %s", err)
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}
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// 4. Check sanity of compacted values.
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checkStorageSaneAndEquivalent(t, "After compaction", ts, samples, s.compactedChunks)
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}
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func TestCompaction(t *testing.T) {
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scenarios := []compactionTestScenario{
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// BEFORE COMPACTION:
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//
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// Chunk size | Fingerprint | Samples
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// 5 | A | 1 .. 5
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// 5 | A | 6 .. 10
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// 5 | A | 11 .. 15
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// 5 | B | 1 .. 5
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// 5 | B | 6 .. 10
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// 5 | B | 11 .. 15
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// 5 | C | 1 .. 5
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// 5 | C | 6 .. 10
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// 5 | C | 11 .. 15
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//
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// AFTER COMPACTION:
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//
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// Chunk size | Fingerprint | Samples
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// 10 | A | 1 .. 10
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// 5 | A | 11 .. 15
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// 10 | B | 1 .. 10
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// 5 | B | 11 .. 15
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// 10 | C | 1 .. 10
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// 5 | C | 11 .. 15
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{
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leveldbChunkSize: 5,
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numTimeseries: 3,
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samplesPerTs: 15,
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ignoreYoungerThan: time.Minute,
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maximumMutationPoolBatch: 30,
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minimumGroupSize: 10,
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uncompactedChunks: 9,
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compactedChunks: 6,
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},
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// BEFORE COMPACTION:
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//
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// Chunk size | Fingerprint | Samples
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// 5 | A | 1 .. 5
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// 5 | A | 6 .. 10
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// 5 | A | 11 .. 15
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// 5 | B | 1 .. 5
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// 5 | B | 6 .. 10
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// 5 | B | 11 .. 15
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// 5 | C | 1 .. 5
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// 5 | C | 6 .. 10
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// 5 | C | 11 .. 15
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//
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// AFTER COMPACTION:
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//
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// Chunk size | Fingerprint | Samples
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// 10 | A | 1 .. 15
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// 10 | B | 1 .. 15
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// 10 | C | 1 .. 15
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{
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leveldbChunkSize: 5,
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numTimeseries: 3,
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samplesPerTs: 15,
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ignoreYoungerThan: time.Minute,
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maximumMutationPoolBatch: 30,
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minimumGroupSize: 30,
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uncompactedChunks: 9,
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compactedChunks: 3,
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},
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// BUG: This case crashes! See:
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// https://github.com/prometheus/prometheus/issues/368
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// Fix this!
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//
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//{
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// leveldbChunkSize: 5,
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// numTimeseries: 3,
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// samplesPerTs: 20,
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// ignoreYoungerThan: time.Minute,
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// maximumMutationPoolBatch: 30,
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// minimumGroupSize: 10,
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// uncompactedChunks: 12,
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// compactedChunks: 9,
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//},
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}
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for _, s := range scenarios {
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s.run(t)
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}
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}
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