mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-09 23:24:05 -08:00
519 lines
15 KiB
Go
519 lines
15 KiB
Go
// Copyright 2021 The Prometheus 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 storage
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
|
|
"github.com/prometheus/prometheus/model/histogram"
|
|
"github.com/prometheus/prometheus/model/labels"
|
|
"github.com/prometheus/prometheus/model/value"
|
|
"github.com/prometheus/prometheus/tsdb/chunkenc"
|
|
"github.com/prometheus/prometheus/tsdb/chunks"
|
|
)
|
|
|
|
func TestListSeriesIterator(t *testing.T) {
|
|
it := NewListSeriesIterator(samples{
|
|
fSample{0, 0},
|
|
fSample{1, 1},
|
|
fSample{1, 1.5},
|
|
fSample{2, 2},
|
|
fSample{3, 3},
|
|
})
|
|
|
|
// Seek to the first sample with ts=1.
|
|
require.Equal(t, chunkenc.ValFloat, it.Seek(1))
|
|
ts, v := it.At()
|
|
require.Equal(t, int64(1), ts)
|
|
require.Equal(t, 1., v)
|
|
|
|
// Seek one further, next sample still has ts=1.
|
|
require.Equal(t, chunkenc.ValFloat, it.Next())
|
|
ts, v = it.At()
|
|
require.Equal(t, int64(1), ts)
|
|
require.Equal(t, 1.5, v)
|
|
|
|
// Seek again to 1 and make sure we stay where we are.
|
|
require.Equal(t, chunkenc.ValFloat, it.Seek(1))
|
|
ts, v = it.At()
|
|
require.Equal(t, int64(1), ts)
|
|
require.Equal(t, 1.5, v)
|
|
|
|
// Another seek.
|
|
require.Equal(t, chunkenc.ValFloat, it.Seek(3))
|
|
ts, v = it.At()
|
|
require.Equal(t, int64(3), ts)
|
|
require.Equal(t, 3., v)
|
|
|
|
// And we don't go back.
|
|
require.Equal(t, chunkenc.ValFloat, it.Seek(2))
|
|
ts, v = it.At()
|
|
require.Equal(t, int64(3), ts)
|
|
require.Equal(t, 3., v)
|
|
|
|
// Seek beyond the end.
|
|
require.Equal(t, chunkenc.ValNone, it.Seek(5))
|
|
// And we don't go back. (This exposes issue #10027.)
|
|
require.Equal(t, chunkenc.ValNone, it.Seek(2))
|
|
}
|
|
|
|
func TestNewListChunkSeriesFromSamples(t *testing.T) {
|
|
lbls := labels.FromStrings("__name__", "the_series")
|
|
series := NewListChunkSeriesFromSamples(
|
|
lbls,
|
|
samples{
|
|
fSample{0, 0},
|
|
fSample{1, 1},
|
|
fSample{1, 1.5},
|
|
fSample{2, 2},
|
|
fSample{3, 3},
|
|
},
|
|
samples{
|
|
fSample{4, 5},
|
|
},
|
|
)
|
|
|
|
require.Equal(t, lbls, series.Labels())
|
|
|
|
it := series.Iterator(nil)
|
|
chks := []chunks.Meta{}
|
|
|
|
for it.Next() {
|
|
chks = append(chks, it.At())
|
|
}
|
|
|
|
require.NoError(t, it.Err())
|
|
require.Len(t, chks, 2)
|
|
|
|
count, err := series.ChunkCount()
|
|
require.NoError(t, err)
|
|
require.Len(t, chks, count, "should have one chunk per group of samples")
|
|
}
|
|
|
|
// TestSeriesSetToChunkSet test the property of SeriesSet that says
|
|
// returned series should be iterable even after Next is called.
|
|
func TestChunkSeriesSetToSeriesSet(t *testing.T) {
|
|
series := []struct {
|
|
lbs labels.Labels
|
|
samples []chunks.Sample
|
|
}{
|
|
{
|
|
lbs: labels.FromStrings("__name__", "up", "instance", "localhost:8080"),
|
|
samples: []chunks.Sample{
|
|
fSample{t: 1, f: 1},
|
|
fSample{t: 2, f: 2},
|
|
fSample{t: 3, f: 3},
|
|
fSample{t: 4, f: 4},
|
|
},
|
|
}, {
|
|
lbs: labels.FromStrings("__name__", "up", "instance", "localhost:8081"),
|
|
samples: []chunks.Sample{
|
|
fSample{t: 1, f: 2},
|
|
fSample{t: 2, f: 3},
|
|
fSample{t: 3, f: 4},
|
|
fSample{t: 4, f: 5},
|
|
fSample{t: 5, f: 6},
|
|
fSample{t: 6, f: 7},
|
|
},
|
|
},
|
|
}
|
|
var chunkSeries []ChunkSeries
|
|
for _, s := range series {
|
|
chunkSeries = append(chunkSeries, NewListChunkSeriesFromSamples(s.lbs, s.samples))
|
|
}
|
|
css := NewMockChunkSeriesSet(chunkSeries...)
|
|
|
|
ss := NewSeriesSetFromChunkSeriesSet(css)
|
|
var ssSlice []Series
|
|
for ss.Next() {
|
|
ssSlice = append(ssSlice, ss.At())
|
|
}
|
|
require.Len(t, ssSlice, 2)
|
|
var iter chunkenc.Iterator
|
|
for i, s := range ssSlice {
|
|
require.EqualValues(t, series[i].lbs, s.Labels())
|
|
iter = s.Iterator(iter)
|
|
j := 0
|
|
for iter.Next() == chunkenc.ValFloat {
|
|
ts, v := iter.At()
|
|
require.EqualValues(t, fSample{t: ts, f: v}, series[i].samples[j])
|
|
j++
|
|
}
|
|
}
|
|
}
|
|
|
|
type histogramTest struct {
|
|
samples []chunks.Sample
|
|
expectedCounterResetHeaders []chunkenc.CounterResetHeader
|
|
}
|
|
|
|
func TestHistogramSeriesToChunks(t *testing.T) {
|
|
h1 := &histogram.Histogram{
|
|
Count: 7,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
},
|
|
PositiveBuckets: []int64{2, 1}, // Abs: 2, 3
|
|
}
|
|
// Appendable to h1.
|
|
h2 := &histogram.Histogram{
|
|
Count: 12,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []int64{2, 1, -2, 3}, // Abs: 2, 3, 1, 4
|
|
}
|
|
// Implicit counter reset by reduction in buckets, not appendable.
|
|
h2down := &histogram.Histogram{
|
|
Count: 10,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 3}, // Abs: 1, 2, 1, 4
|
|
}
|
|
|
|
fh1 := &histogram.FloatHistogram{
|
|
Count: 6,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
},
|
|
PositiveBuckets: []float64{3, 1},
|
|
}
|
|
// Appendable to fh1.
|
|
fh2 := &histogram.FloatHistogram{
|
|
Count: 17,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []float64{4, 2, 7, 2},
|
|
}
|
|
// Implicit counter reset by reduction in buckets, not appendable.
|
|
fh2down := &histogram.FloatHistogram{
|
|
Count: 15,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []float64{2, 2, 7, 2},
|
|
}
|
|
|
|
// Gauge histogram.
|
|
gh1 := &histogram.Histogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 7,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
},
|
|
PositiveBuckets: []int64{2, 1}, // Abs: 2, 3
|
|
}
|
|
gh2 := &histogram.Histogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 12,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []int64{2, 1, -2, 3}, // Abs: 2, 3, 1, 4
|
|
}
|
|
|
|
// Float gauge histogram.
|
|
gfh1 := &histogram.FloatHistogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 6,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
},
|
|
PositiveBuckets: []float64{3, 1},
|
|
}
|
|
gfh2 := &histogram.FloatHistogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 17,
|
|
ZeroCount: 2,
|
|
ZeroThreshold: 0.001,
|
|
Sum: 100,
|
|
Schema: 0,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
},
|
|
PositiveBuckets: []float64{4, 2, 7, 2},
|
|
}
|
|
|
|
staleHistogram := &histogram.Histogram{
|
|
Sum: math.Float64frombits(value.StaleNaN),
|
|
}
|
|
staleFloatHistogram := &histogram.FloatHistogram{
|
|
Sum: math.Float64frombits(value.StaleNaN),
|
|
}
|
|
|
|
tests := map[string]histogramTest{
|
|
"single histogram to single chunk": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset},
|
|
},
|
|
"two histograms encoded to a single chunk": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h1},
|
|
hSample{t: 2, h: h2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset},
|
|
},
|
|
"two histograms encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h2},
|
|
hSample{t: 2, h: h1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.CounterReset},
|
|
},
|
|
"histogram and stale sample encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: staleHistogram},
|
|
hSample{t: 2, h: h1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.UnknownCounterReset},
|
|
},
|
|
"histogram and reduction in bucket encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h1},
|
|
hSample{t: 2, h: h2down},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.CounterReset},
|
|
},
|
|
// Float histograms.
|
|
"single float histogram to single chunk": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: fh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset},
|
|
},
|
|
"two float histograms encoded to a single chunk": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: fh1},
|
|
fhSample{t: 2, fh: fh2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset},
|
|
},
|
|
"two float histograms encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: fh2},
|
|
fhSample{t: 2, fh: fh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.CounterReset},
|
|
},
|
|
"float histogram and stale sample encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: staleFloatHistogram},
|
|
fhSample{t: 2, fh: fh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.UnknownCounterReset},
|
|
},
|
|
"float histogram and reduction in bucket encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: fh1},
|
|
fhSample{t: 2, fh: fh2down},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.CounterReset},
|
|
},
|
|
// Mixed.
|
|
"histogram and float histogram encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h1},
|
|
fhSample{t: 2, fh: fh2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.UnknownCounterReset},
|
|
},
|
|
"float histogram and histogram encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: fh1},
|
|
hSample{t: 2, h: h2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.UnknownCounterReset},
|
|
},
|
|
"histogram and stale float histogram encoded to two chunks": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: h1},
|
|
fhSample{t: 2, fh: staleFloatHistogram},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.UnknownCounterReset, chunkenc.UnknownCounterReset},
|
|
},
|
|
"single gauge histogram encoded to one chunk": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: gh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
"two gauge histograms encoded to one chunk when counter increases": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: gh1},
|
|
hSample{t: 2, h: gh2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
"two gauge histograms encoded to one chunk when counter decreases": {
|
|
samples: []chunks.Sample{
|
|
hSample{t: 1, h: gh2},
|
|
hSample{t: 2, h: gh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
"single gauge float histogram encoded to one chunk": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: gfh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
"two float gauge histograms encoded to one chunk when counter increases": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: gfh1},
|
|
fhSample{t: 2, fh: gfh2},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
"two float gauge histograms encoded to one chunk when counter decreases": {
|
|
samples: []chunks.Sample{
|
|
fhSample{t: 1, fh: gfh2},
|
|
fhSample{t: 2, fh: gfh1},
|
|
},
|
|
expectedCounterResetHeaders: []chunkenc.CounterResetHeader{chunkenc.GaugeType},
|
|
},
|
|
}
|
|
|
|
for testName, test := range tests {
|
|
t.Run(testName, func(t *testing.T) {
|
|
testHistogramsSeriesToChunks(t, test)
|
|
})
|
|
}
|
|
}
|
|
|
|
func testHistogramsSeriesToChunks(t *testing.T, test histogramTest) {
|
|
lbs := labels.FromStrings("__name__", "up", "instance", "localhost:8080")
|
|
copiedSamples := []chunks.Sample{}
|
|
for _, s := range test.samples {
|
|
switch cs := s.(type) {
|
|
case hSample:
|
|
copiedSamples = append(copiedSamples, hSample{t: cs.t, h: cs.h.Copy()})
|
|
case fhSample:
|
|
copiedSamples = append(copiedSamples, fhSample{t: cs.t, fh: cs.fh.Copy()})
|
|
default:
|
|
t.Error("internal error, unexpected type")
|
|
}
|
|
}
|
|
series := NewListSeries(lbs, copiedSamples)
|
|
encoder := NewSeriesToChunkEncoder(series)
|
|
require.EqualValues(t, lbs, encoder.Labels())
|
|
|
|
chks, err := ExpandChunks(encoder.Iterator(nil))
|
|
require.NoError(t, err)
|
|
require.Equal(t, len(test.expectedCounterResetHeaders), len(chks))
|
|
|
|
count, err := encoder.ChunkCount()
|
|
require.NoError(t, err)
|
|
require.Len(t, chks, count)
|
|
|
|
// Decode all encoded samples and assert they are equal to the original ones.
|
|
encodedSamples := chunks.ChunkMetasToSamples(chks)
|
|
require.Equal(t, len(test.samples), len(encodedSamples))
|
|
|
|
for i, s := range test.samples {
|
|
encodedSample := encodedSamples[i]
|
|
switch expectedSample := s.(type) {
|
|
case hSample:
|
|
require.Equal(t, chunkenc.ValHistogram, encodedSample.Type(), "expect histogram", fmt.Sprintf("at idx %d", i))
|
|
h := encodedSample.H()
|
|
// Ignore counter reset if not gauge here, will check on chunk level.
|
|
if expectedSample.h.CounterResetHint != histogram.GaugeType {
|
|
h.CounterResetHint = histogram.UnknownCounterReset
|
|
}
|
|
if value.IsStaleNaN(expectedSample.h.Sum) {
|
|
require.True(t, value.IsStaleNaN(h.Sum), fmt.Sprintf("at idx %d", i))
|
|
continue
|
|
}
|
|
require.Equal(t, *expectedSample.h, *h.Compact(0), fmt.Sprintf("at idx %d", i))
|
|
case fhSample:
|
|
require.Equal(t, chunkenc.ValFloatHistogram, encodedSample.Type(), "expect float histogram", fmt.Sprintf("at idx %d", i))
|
|
fh := encodedSample.FH()
|
|
// Ignore counter reset if not gauge here, will check on chunk level.
|
|
if expectedSample.fh.CounterResetHint != histogram.GaugeType {
|
|
fh.CounterResetHint = histogram.UnknownCounterReset
|
|
}
|
|
if value.IsStaleNaN(expectedSample.fh.Sum) {
|
|
require.True(t, value.IsStaleNaN(fh.Sum), fmt.Sprintf("at idx %d", i))
|
|
continue
|
|
}
|
|
require.Equal(t, *expectedSample.fh, *fh.Compact(0), fmt.Sprintf("at idx %d", i))
|
|
default:
|
|
t.Error("internal error, unexpected type")
|
|
}
|
|
}
|
|
|
|
for i, expectedCounterResetHint := range test.expectedCounterResetHeaders {
|
|
require.Equal(t, expectedCounterResetHint, getCounterResetHint(chks[i]), fmt.Sprintf("chunk at index %d", i))
|
|
}
|
|
}
|
|
|
|
func getCounterResetHint(chunk chunks.Meta) chunkenc.CounterResetHeader {
|
|
switch chk := chunk.Chunk.(type) {
|
|
case *chunkenc.HistogramChunk:
|
|
return chk.GetCounterResetHeader()
|
|
case *chunkenc.FloatHistogramChunk:
|
|
return chk.GetCounterResetHeader()
|
|
}
|
|
return chunkenc.UnknownCounterReset
|
|
}
|