prometheus/tsdb/head_read_test.go

555 lines
21 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 tsdb
import (
"fmt"
"sync"
"testing"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/tsdb/chunkenc"
"github.com/prometheus/prometheus/tsdb/chunks"
)
func TestBoundedChunk(t *testing.T) {
tests := []struct {
name string
inputChunk chunkenc.Chunk
inputMinT int64
inputMaxT int64
initialSeek int64
seekIsASuccess bool
expSamples []sample
}{
{
name: "if there are no samples it returns nothing",
inputChunk: newTestChunk(0),
expSamples: nil,
},
{
name: "bounds represent a single sample",
inputChunk: newTestChunk(10),
expSamples: []sample{
{0, 0, nil, nil},
},
},
{
name: "if there are bounds set only samples within them are returned",
inputChunk: newTestChunk(10),
inputMinT: 1,
inputMaxT: 8,
expSamples: []sample{
{1, 1, nil, nil},
{2, 2, nil, nil},
{3, 3, nil, nil},
{4, 4, nil, nil},
{5, 5, nil, nil},
{6, 6, nil, nil},
{7, 7, nil, nil},
{8, 8, nil, nil},
},
},
{
name: "if bounds set and only maxt is less than actual maxt",
inputChunk: newTestChunk(10),
inputMinT: 0,
inputMaxT: 5,
expSamples: []sample{
{0, 0, nil, nil},
{1, 1, nil, nil},
{2, 2, nil, nil},
{3, 3, nil, nil},
{4, 4, nil, nil},
{5, 5, nil, nil},
},
},
{
name: "if bounds set and only mint is more than actual mint",
inputChunk: newTestChunk(10),
inputMinT: 5,
inputMaxT: 9,
expSamples: []sample{
{5, 5, nil, nil},
{6, 6, nil, nil},
{7, 7, nil, nil},
{8, 8, nil, nil},
{9, 9, nil, nil},
},
},
{
name: "if there are bounds set with seek before mint",
inputChunk: newTestChunk(10),
inputMinT: 3,
inputMaxT: 7,
initialSeek: 1,
seekIsASuccess: true,
expSamples: []sample{
{3, 3, nil, nil},
{4, 4, nil, nil},
{5, 5, nil, nil},
{6, 6, nil, nil},
{7, 7, nil, nil},
},
},
{
name: "if there are bounds set with seek between mint and maxt",
inputChunk: newTestChunk(10),
inputMinT: 3,
inputMaxT: 7,
initialSeek: 5,
seekIsASuccess: true,
expSamples: []sample{
{5, 5, nil, nil},
{6, 6, nil, nil},
{7, 7, nil, nil},
},
},
{
name: "if there are bounds set with seek after maxt",
inputChunk: newTestChunk(10),
inputMinT: 3,
inputMaxT: 7,
initialSeek: 8,
seekIsASuccess: false,
},
}
for _, tc := range tests {
t.Run(fmt.Sprintf("name=%s", tc.name), func(t *testing.T) {
iterable := boundedIterable{tc.inputChunk, tc.inputMinT, tc.inputMaxT}
var samples []sample
it := iterable.Iterator(nil)
if tc.initialSeek != 0 {
// Testing Seek()
val := it.Seek(tc.initialSeek)
require.Equal(t, tc.seekIsASuccess, val == chunkenc.ValFloat)
if val == chunkenc.ValFloat {
t, v := it.At()
samples = append(samples, sample{t, v, nil, nil})
}
}
// Testing Next()
for it.Next() == chunkenc.ValFloat {
t, v := it.At()
samples = append(samples, sample{t, v, nil, nil})
}
// it.Next() should keep returning no value.
for i := 0; i < 10; i++ {
require.Equal(t, chunkenc.ValNone, it.Next())
}
require.Equal(t, tc.expSamples, samples)
})
}
}
func newTestChunk(numSamples int) chunkenc.Chunk {
xor := chunkenc.NewXORChunk()
a, _ := xor.Appender()
for i := 0; i < numSamples; i++ {
a.Append(int64(i), float64(i))
}
return xor
}
// TestMemSeries_chunk runs a series of tests on memSeries.chunk() calls.
// It will simulate various conditions to ensure all code paths in that function are covered.
func TestMemSeries_chunk(t *testing.T) {
const chunkRange int64 = 100
const chunkStep int64 = 5
appendSamples := func(t *testing.T, s *memSeries, start, end int64, cdm *chunks.ChunkDiskMapper) {
for i := start; i < end; i += chunkStep {
ok, _ := s.append(i, float64(i), 0, chunkOpts{
chunkDiskMapper: cdm,
chunkRange: chunkRange,
samplesPerChunk: DefaultSamplesPerChunk,
})
require.True(t, ok, "sample append failed")
}
}
type setupFn func(*testing.T, *memSeries, *chunks.ChunkDiskMapper)
type callOutput uint8
const (
outOpenHeadChunk callOutput = iota // memSeries.chunk() call returned memSeries.headChunks with headChunk=true & isOpen=true
outClosedHeadChunk // memSeries.chunk() call returned memSeries.headChunks with headChunk=true & isOpen=false
outMmappedChunk // memSeries.chunk() call returned a chunk from memSeries.mmappedChunks with headChunk=false
outErr // memSeries.chunk() call returned an error
)
tests := []struct {
name string
setup setupFn // optional function called just before the test memSeries.chunk() call
inputID chunks.HeadChunkID // requested chunk id for memSeries.chunk() call
expected callOutput
}{
{
name: "call ix=0 on empty memSeries",
inputID: 0,
expected: outErr,
},
{
name: "call ix=1 on empty memSeries",
inputID: 1,
expected: outErr,
},
{
name: "firstChunkID > ix",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, chunkRange-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
s.firstChunkID = 5
},
inputID: 1,
expected: outErr,
},
{
name: "call ix=0 on memSeries with no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, chunkRange-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 0,
expected: outOpenHeadChunk,
},
{
name: "call ix=1 on memSeries with no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, chunkRange-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 1,
expected: outErr,
},
{
name: "call ix=10 on memSeries with no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, chunkRange-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 10,
expected: outErr,
},
{
name: "call ix=0 on memSeries with 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 0,
expected: outMmappedChunk,
},
{
name: "call ix=1 on memSeries with 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 1,
expected: outMmappedChunk,
},
{
name: "call ix=3 on memSeries with 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 3,
expected: outOpenHeadChunk,
},
{
name: "call ix=0 on memSeries with 3 mmapped chunks and no headChunk",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
s.headChunks = nil
},
inputID: 0,
expected: outMmappedChunk,
},
{
name: "call ix=2 on memSeries with 3 mmapped chunks and no headChunk",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
s.headChunks = nil
},
inputID: 2,
expected: outMmappedChunk,
},
{
name: "call ix=3 on memSeries with 3 mmapped chunks and no headChunk",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
s.headChunks = nil
},
inputID: 3,
expected: outErr,
},
{
name: "call ix=1 on memSeries with 3 mmapped chunks and closed ChunkDiskMapper",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
cdm.Close()
},
inputID: 1,
expected: outErr,
},
{
name: "call ix=3 on memSeries with 3 mmapped chunks and closed ChunkDiskMapper",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*4)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
cdm.Close()
},
inputID: 3,
expected: outOpenHeadChunk,
},
{
name: "call ix=0 on memSeries with 3 head chunks and no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*3, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*3)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 0,
expected: outClosedHeadChunk,
},
{
name: "call ix=1 on memSeries with 3 head chunks and no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*3, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*3)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 1,
expected: outClosedHeadChunk,
},
{
name: "call ix=10 on memSeries with 3 head chunks and no mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*3, cdm)
require.Empty(t, s.mmappedChunks, "wrong number of mmappedChunks")
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Equal(t, int64(0), s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*3)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 10,
expected: outErr,
},
{
name: "call ix=0 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 0,
expected: outMmappedChunk,
},
{
name: "call ix=2 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 2,
expected: outMmappedChunk,
},
{
name: "call ix=3 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 3,
expected: outClosedHeadChunk,
},
{
name: "call ix=5 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 5,
expected: outOpenHeadChunk,
},
{
name: "call ix=6 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 6,
expected: outErr,
},
{
name: "call ix=10 on memSeries with 3 head chunks and 3 mmapped chunks",
setup: func(t *testing.T, s *memSeries, cdm *chunks.ChunkDiskMapper) {
appendSamples(t, s, 0, chunkRange*4, cdm)
s.mmapChunks(cdm)
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, 1, s.headChunks.len(), "wrong number of headChunks")
appendSamples(t, s, chunkRange*4, chunkRange*6, cdm)
require.Equal(t, 3, s.headChunks.len(), "wrong number of headChunks")
require.Len(t, s.mmappedChunks, 3, "wrong number of mmappedChunks")
require.Equal(t, chunkRange*3, s.headChunks.oldest().minTime, "wrong minTime on last headChunks element")
require.Equal(t, (chunkRange*6)-chunkStep, s.headChunks.maxTime, "wrong maxTime on first headChunks element")
},
inputID: 10,
expected: outErr,
},
}
memChunkPool := &sync.Pool{
New: func() interface{} {
return &memChunk{}
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
dir := t.TempDir()
chunkDiskMapper, err := chunks.NewChunkDiskMapper(nil, dir, chunkenc.NewPool(), chunks.DefaultWriteBufferSize, chunks.DefaultWriteQueueSize)
require.NoError(t, err)
defer func() {
require.NoError(t, chunkDiskMapper.Close())
}()
series := newMemSeries(labels.EmptyLabels(), 1, true)
if tc.setup != nil {
tc.setup(t, series, chunkDiskMapper)
}
chk, headChunk, isOpen, err := series.chunk(tc.inputID, chunkDiskMapper, memChunkPool)
switch tc.expected {
case outOpenHeadChunk:
require.NoError(t, err, "unexpected error")
require.True(t, headChunk, "expected a chunk with headChunk=true but got headChunk=%v", headChunk)
require.True(t, isOpen, "expected a chunk with isOpen=true but got isOpen=%v", isOpen)
case outClosedHeadChunk:
require.NoError(t, err, "unexpected error")
require.True(t, headChunk, "expected a chunk with headChunk=true but got headChunk=%v", headChunk)
require.False(t, isOpen, "expected a chunk with isOpen=false but got isOpen=%v", isOpen)
case outMmappedChunk:
require.NoError(t, err, "unexpected error")
require.False(t, headChunk, "expected a chunk with headChunk=false but got gc=%v", headChunk)
case outErr:
require.Nil(t, chk, "got a non-nil chunk reference returned with an error")
require.Error(t, err)
}
})
}
}