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prometheus/tsdb/db_test.go
Bartlomiej Plotka cfba92a133 Addressed comments. 
Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-02-17 18:03:57 +00:00

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// Copyright 2017 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 (
"context"
"encoding/binary"
"fmt"
"hash/crc32"
"io/ioutil"
"math"
"math/rand"
"os"
"path"
"path/filepath"
"sort"
"strconv"
"sync"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/oklog/ulid"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/storage"
"github.com/prometheus/prometheus/tsdb/chunks"
"github.com/prometheus/prometheus/tsdb/fileutil"
"github.com/prometheus/prometheus/tsdb/index"
"github.com/prometheus/prometheus/tsdb/record"
"github.com/prometheus/prometheus/tsdb/tombstones"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/tsdb/wal"
"github.com/prometheus/prometheus/util/testutil"
)
func openTestDB(t testing.TB, opts *Options, rngs []int64) (db *DB, close func()) {
tmpdir, err := ioutil.TempDir("", "test")
testutil.Ok(t, err)
if len(rngs) == 0 {
db, err = Open(tmpdir, nil, nil, opts)
} else {
opts, rngs = validateOpts(opts, rngs)
db, err = open(tmpdir, nil, nil, opts, rngs)
}
testutil.Ok(t, err)
// Do not close the test database by default as it will deadlock on test failures.
return db, func() {
testutil.Ok(t, os.RemoveAll(tmpdir))
}
}
// query runs a matcher query against the querier and fully expands its data.
func query(t testing.TB, q storage.Querier, matchers ...*labels.Matcher) map[string][]tsdbutil.Sample {
ss, ws, err := q.Select(nil, matchers...)
defer func() {
testutil.Ok(t, q.Close())
}()
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
result := map[string][]tsdbutil.Sample{}
for ss.Next() {
series := ss.At()
samples := []tsdbutil.Sample{}
it := series.Iterator()
for it.Next() {
t, v := it.At()
samples = append(samples, sample{t: t, v: v})
}
testutil.Ok(t, it.Err())
name := series.Labels().String()
result[name] = samples
}
testutil.Ok(t, ss.Err())
return result
}
// Ensure that blocks are held in memory in their time order
// and not in ULID order as they are read from the directory.
func TestDB_reloadOrder(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
metas := []BlockMeta{
{MinTime: 90, MaxTime: 100},
{MinTime: 70, MaxTime: 80},
{MinTime: 100, MaxTime: 110},
}
for _, m := range metas {
createBlock(t, db.Dir(), genSeries(1, 1, m.MinTime, m.MaxTime))
}
testutil.Ok(t, db.reload())
blocks := db.Blocks()
testutil.Equals(t, 3, len(blocks))
testutil.Equals(t, metas[1].MinTime, blocks[0].Meta().MinTime)
testutil.Equals(t, metas[1].MaxTime, blocks[0].Meta().MaxTime)
testutil.Equals(t, metas[0].MinTime, blocks[1].Meta().MinTime)
testutil.Equals(t, metas[0].MaxTime, blocks[1].Meta().MaxTime)
testutil.Equals(t, metas[2].MinTime, blocks[2].Meta().MinTime)
testutil.Equals(t, metas[2].MaxTime, blocks[2].Meta().MaxTime)
}
func TestDataAvailableOnlyAfterCommit(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.FromStrings("foo", "bar"), 0, 0)
testutil.Ok(t, err)
querier, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{}, seriesSet)
err = app.Commit()
testutil.Ok(t, err)
querier, err = db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
defer querier.Close()
seriesSet = query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{`{foo="bar"}`: {sample{t: 0, v: 0}}}, seriesSet)
}
func TestDataNotAvailableAfterRollback(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.FromStrings("foo", "bar"), 0, 0)
testutil.Ok(t, err)
err = app.Rollback()
testutil.Ok(t, err)
querier, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
defer querier.Close()
seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{}, seriesSet)
}
func TestDBAppenderAddRef(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app1 := db.Appender()
ref1, err := app1.Add(labels.FromStrings("a", "b"), 123, 0)
testutil.Ok(t, err)
// Reference should already work before commit.
err = app1.AddFast(ref1, 124, 1)
testutil.Ok(t, err)
err = app1.Commit()
testutil.Ok(t, err)
app2 := db.Appender()
// first ref should already work in next transaction.
err = app2.AddFast(ref1, 125, 0)
testutil.Ok(t, err)
ref2, err := app2.Add(labels.FromStrings("a", "b"), 133, 1)
testutil.Ok(t, err)
testutil.Assert(t, ref1 == ref2, "")
// Reference must be valid to add another sample.
err = app2.AddFast(ref2, 143, 2)
testutil.Ok(t, err)
err = app2.AddFast(9999999, 1, 1)
testutil.Equals(t, ErrNotFound, errors.Cause(err))
testutil.Ok(t, app2.Commit())
q, err := db.Querier(context.TODO(), 0, 200)
testutil.Ok(t, err)
res := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.FromStrings("a", "b").String(): {
sample{t: 123, v: 0},
sample{t: 124, v: 1},
sample{t: 125, v: 0},
sample{t: 133, v: 1},
sample{t: 143, v: 2},
},
}, res)
}
func TestAppendEmptyLabelsIgnored(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app1 := db.Appender()
ref1, err := app1.Add(labels.FromStrings("a", "b"), 123, 0)
testutil.Ok(t, err)
// Construct labels manually so there is an empty label.
ref2, err := app1.Add(labels.Labels{labels.Label{Name: "a", Value: "b"}, labels.Label{Name: "c", Value: ""}}, 124, 0)
testutil.Ok(t, err)
// Should be the same series.
testutil.Equals(t, ref1, ref2)
err = app1.Commit()
testutil.Ok(t, err)
}
func TestDeleteSimple(t *testing.T) {
numSamples := int64(10)
cases := []struct {
Intervals tombstones.Intervals
remaint []int64
}{
{
Intervals: tombstones.Intervals{{Mint: 0, Maxt: 3}},
remaint: []int64{4, 5, 6, 7, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}},
remaint: []int64{0, 4, 5, 6, 7, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 700}},
remaint: []int64{0},
},
{ // This case is to ensure that labels and symbols are deleted.
Intervals: tombstones.Intervals{{Mint: 0, Maxt: 9}},
remaint: []int64{},
},
}
Outer:
for _, c := range cases {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
// TODO(gouthamve): Reset the tombstones somehow.
// Delete the ranges.
for _, r := range c.Intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
res, ws, err := q.Select(nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestAmendDatapointCausesError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{}, 0, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{}, 0, 1)
testutil.Equals(t, ErrAmendSample, err)
testutil.Ok(t, app.Rollback())
}
func TestDuplicateNaNDatapointNoAmendError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{}, 0, math.NaN())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{}, 0, math.NaN())
testutil.Ok(t, err)
}
func TestNonDuplicateNaNDatapointsCausesAmendError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{}, 0, math.Float64frombits(0x7ff0000000000001))
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{}, 0, math.Float64frombits(0x7ff0000000000002))
testutil.Equals(t, ErrAmendSample, err)
}
func TestSkippingInvalidValuesInSameTxn(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
// Append AmendedValue.
app := db.Appender()
_, err := app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 1)
testutil.Ok(t, err)
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 2)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
// Make sure the right value is stored.
q, err := db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
ssMap := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.New(labels.Label{Name: "a", Value: "b"}).String(): {sample{0, 1}},
}, ssMap)
// Append Out of Order Value.
app = db.Appender()
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 10, 3)
testutil.Ok(t, err)
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 7, 5)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
q, err = db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
ssMap = query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.New(labels.Label{Name: "a", Value: "b"}).String(): {sample{0, 1}, sample{10, 3}},
}, ssMap)
}
func TestDB_Snapshot(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
// append data
app := db.Appender()
mint := int64(1414141414000)
for i := 0; i < 1000; i++ {
_, err := app.Add(labels.FromStrings("foo", "bar"), mint+int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
testutil.Ok(t, app.Rollback())
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
querier, err := db.Querier(context.TODO(), mint, mint+1000)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// sum values
seriesSet, ws, err := querier.Select(nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
testutil.Equals(t, 1000.0, sum)
}
// TestDB_Snapshot_ChunksOutsideOfCompactedRange ensures that a snapshot removes chunks samples
// that are outside the set block time range.
// See https://github.com/prometheus/prometheus/issues/5105
func TestDB_Snapshot_ChunksOutsideOfCompactedRange(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
mint := int64(1414141414000)
for i := 0; i < 1000; i++ {
_, err := app.Add(labels.FromStrings("foo", "bar"), mint+int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
testutil.Ok(t, app.Rollback())
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
// Hackingly introduce "race", by having lower max time then maxTime in last chunk.
db.head.maxTime = db.head.maxTime - 10
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// Reopen DB from snapshot.
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
querier, err := db.Querier(context.TODO(), mint, mint+1000)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// Sum values.
seriesSet, ws, err := querier.Select(nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
// Since we snapshotted with MaxTime - 10, so expect 10 less samples.
testutil.Equals(t, 1000.0-10, sum)
}
func TestDB_SnapshotWithDelete(t *testing.T) {
numSamples := int64(10)
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
cases := []struct {
intervals tombstones.Intervals
remaint []int64
}{
{
intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
}
Outer:
for _, c := range cases {
// TODO(gouthamve): Reset the tombstones somehow.
// Delete the ranges.
for _, r := range c.intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, q.Close()) }()
res, ws, err := q.Select(nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
if len(expSamples) == 0 {
testutil.Assert(t, res.Next() == false, "")
continue
}
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestDB_e2e(t *testing.T) {
const (
numDatapoints = 1000
numRanges = 1000
timeInterval = int64(3)
)
// Create 8 series with 1000 data-points of different ranges and run queries.
lbls := []labels.Labels{
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prom-k8s"},
},
}
seriesMap := map[string][]tsdbutil.Sample{}
for _, l := range lbls {
seriesMap[labels.New(l...).String()] = []tsdbutil.Sample{}
}
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
for _, l := range lbls {
lset := labels.New(l...)
series := []tsdbutil.Sample{}
ts := rand.Int63n(300)
for i := 0; i < numDatapoints; i++ {
v := rand.Float64()
series = append(series, sample{ts, v})
_, err := app.Add(lset, ts, v)
testutil.Ok(t, err)
ts += rand.Int63n(timeInterval) + 1
}
seriesMap[lset.String()] = series
}
testutil.Ok(t, app.Commit())
// Query each selector on 1000 random time-ranges.
queries := []struct {
ms []*labels.Matcher
}{
{
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "b")},
},
{
ms: []*labels.Matcher{
labels.MustNewMatcher(labels.MatchEqual, "a", "b"),
labels.MustNewMatcher(labels.MatchEqual, "job", "prom-k8s"),
},
},
{
ms: []*labels.Matcher{
labels.MustNewMatcher(labels.MatchEqual, "a", "c"),
labels.MustNewMatcher(labels.MatchEqual, "instance", "localhost:9090"),
labels.MustNewMatcher(labels.MatchEqual, "job", "prometheus"),
},
},
// TODO: Add Regexp Matchers.
}
for _, qry := range queries {
matched := labels.Slice{}
for _, ls := range lbls {
s := labels.Selector(qry.ms)
if s.Matches(ls) {
matched = append(matched, ls)
}
}
sort.Sort(matched)
for i := 0; i < numRanges; i++ {
mint := rand.Int63n(300)
maxt := mint + rand.Int63n(timeInterval*int64(numDatapoints))
expected := map[string][]tsdbutil.Sample{}
// Build the mockSeriesSet.
for _, m := range matched {
smpls := boundedSamples(seriesMap[m.String()], mint, maxt)
if len(smpls) > 0 {
expected[m.String()] = smpls
}
}
q, err := db.Querier(context.TODO(), mint, maxt)
testutil.Ok(t, err)
ss, ws, err := q.Select(nil, qry.ms...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
result := map[string][]tsdbutil.Sample{}
for ss.Next() {
x := ss.At()
smpls, err := expandSeriesIterator(x.Iterator())
testutil.Ok(t, err)
if len(smpls) > 0 {
result[x.Labels().String()] = smpls
}
}
testutil.Ok(t, ss.Err())
testutil.Equals(t, expected, result)
q.Close()
}
}
}
func TestWALFlushedOnDBClose(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
dirDb := db.Dir()
lbls := labels.Labels{labels.Label{Name: "labelname", Value: "labelvalue"}}
app := db.Appender()
_, err := app.Add(lbls, 0, 1)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Close())
db, err = Open(dirDb, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
q, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
values, ws, err := q.LabelValues("labelname")
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
testutil.Equals(t, []string{"labelvalue"}, values)
}
func TestWALSegmentSizeOptions(t *testing.T) {
tests := map[int]func(dbdir string, segmentSize int){
// Default Wal Size.
0: func(dbDir string, segmentSize int) {
files, err := ioutil.ReadDir(filepath.Join(dbDir, "wal"))
testutil.Ok(t, err)
for _, f := range files[:len(files)-1] {
testutil.Equals(t, int64(DefaultOptions().WALSegmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name())
}
lastFile := files[len(files)-1]
testutil.Assert(t, int64(DefaultOptions().WALSegmentSize) > lastFile.Size(), "last WAL file size is not smaller than the WALSegmentSize option, filename: %v", lastFile.Name())
},
// Custom Wal Size.
2 * 32 * 1024: func(dbDir string, segmentSize int) {
files, err := ioutil.ReadDir(filepath.Join(dbDir, "wal"))
testutil.Assert(t, len(files) > 1, "current WALSegmentSize should result in more than a single WAL file.")
testutil.Ok(t, err)
for _, f := range files[:len(files)-1] {
testutil.Equals(t, int64(segmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name())
}
lastFile := files[len(files)-1]
testutil.Assert(t, int64(segmentSize) > lastFile.Size(), "last WAL file size is not smaller than the WALSegmentSize option, filename: %v", lastFile.Name())
},
// Wal disabled.
-1: func(dbDir string, segmentSize int) {
if _, err := os.Stat(filepath.Join(dbDir, "wal")); !os.IsNotExist(err) {
t.Fatal("wal directory is present when the wal is disabled")
}
},
}
for segmentSize, testFunc := range tests {
t.Run(fmt.Sprintf("WALSegmentSize %d test", segmentSize), func(t *testing.T) {
opts := DefaultOptions()
opts.WALSegmentSize = segmentSize
db, closeFn := openTestDB(t, opts, nil)
defer closeFn()
app := db.Appender()
for i := int64(0); i < 155; i++ {
_, err := app.Add(labels.Labels{labels.Label{Name: "wal", Value: "size"}}, i, rand.Float64())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
}
dbDir := db.Dir()
testutil.Ok(t, db.Close())
testFunc(dbDir, int(opts.WALSegmentSize))
})
}
}
func TestTombstoneClean(t *testing.T) {
numSamples := int64(10)
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
cases := []struct {
intervals tombstones.Intervals
remaint []int64
}{
{
intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
}
for _, c := range cases {
// Delete the ranges.
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
for _, r := range c.intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// All of the setup for THIS line.
testutil.Ok(t, db.CleanTombstones())
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
defer q.Close()
res, ws, err := q.Select(nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
if len(expSamples) == 0 {
testutil.Assert(t, res.Next() == false, "")
continue
}
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
break
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
for _, b := range db.Blocks() {
testutil.Equals(t, tombstones.NewMemTombstones(), b.tombstones)
}
}
}
// TestTombstoneCleanFail tests that a failing TombstoneClean doesn't leave any blocks behind.
// When TombstoneClean errors the original block that should be rebuilt doesn't get deleted so
// if TombstoneClean leaves any blocks behind these will overlap.
func TestTombstoneCleanFail(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
var expectedBlockDirs []string
// Create some empty blocks pending for compaction.
// totalBlocks should be >=2 so we have enough blocks to trigger compaction failure.
totalBlocks := 2
for i := 0; i < totalBlocks; i++ {
blockDir := createBlock(t, db.Dir(), genSeries(1, 1, 0, 1))
block, err := OpenBlock(nil, blockDir, nil)
testutil.Ok(t, err)
// Add some fake tombstones to trigger the compaction.
tomb := tombstones.NewMemTombstones()
tomb.AddInterval(0, tombstones.Interval{Mint: 0, Maxt: 1})
block.tombstones = tomb
db.blocks = append(db.blocks, block)
expectedBlockDirs = append(expectedBlockDirs, blockDir)
}
// Initialize the mockCompactorFailing with a room for a single compaction iteration.
// mockCompactorFailing will fail on the second iteration so we can check if the cleanup works as expected.
db.compactor = &mockCompactorFailing{
t: t,
blocks: db.blocks,
max: totalBlocks + 1,
}
// The compactor should trigger a failure here.
testutil.NotOk(t, db.CleanTombstones())
// Now check that the CleanTombstones didn't leave any blocks behind after a failure.
actualBlockDirs, err := blockDirs(db.dir)
testutil.Ok(t, err)
testutil.Equals(t, expectedBlockDirs, actualBlockDirs)
}
// mockCompactorFailing creates a new empty block on every write and fails when reached the max allowed total.
type mockCompactorFailing struct {
t *testing.T
blocks []*Block
max int
}
func (*mockCompactorFailing) Plan(dir string) ([]string, error) {
return nil, nil
}
func (c *mockCompactorFailing) Write(dest string, b BlockReader, mint, maxt int64, parent *BlockMeta) (ulid.ULID, error) {
if len(c.blocks) >= c.max {
return ulid.ULID{}, fmt.Errorf("the compactor already did the maximum allowed blocks so it is time to fail")
}
block, err := OpenBlock(nil, createBlock(c.t, dest, genSeries(1, 1, 0, 1)), nil)
testutil.Ok(c.t, err)
testutil.Ok(c.t, block.Close()) // Close block as we won't be using anywhere.
c.blocks = append(c.blocks, block)
// Now check that all expected blocks are actually persisted on disk.
// This way we make sure that the we have some blocks that are supposed to be removed.
var expectedBlocks []string
for _, b := range c.blocks {
expectedBlocks = append(expectedBlocks, filepath.Join(dest, b.Meta().ULID.String()))
}
actualBlockDirs, err := blockDirs(dest)
testutil.Ok(c.t, err)
testutil.Equals(c.t, expectedBlocks, actualBlockDirs)
return block.Meta().ULID, nil
}
func (*mockCompactorFailing) Compact(string, []string, []*Block) (ulid.ULID, error) {
return ulid.ULID{}, nil
}
func TestTimeRetention(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{1000})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blocks := []*BlockMeta{
{MinTime: 500, MaxTime: 900}, // Oldest block
{MinTime: 1000, MaxTime: 1500},
{MinTime: 1500, MaxTime: 2000}, // Newest Block
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(10, 10, m.MinTime, m.MaxTime))
}
testutil.Ok(t, db.reload()) // Reload the db to register the new blocks.
testutil.Equals(t, len(blocks), len(db.Blocks())) // Ensure all blocks are registered.
db.opts.RetentionDuration = blocks[2].MaxTime - blocks[1].MinTime
testutil.Ok(t, db.reload())
expBlocks := blocks[1:]
actBlocks := db.Blocks()
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(db.metrics.timeRetentionCount)), "metric retention count mismatch")
testutil.Equals(t, len(expBlocks), len(actBlocks))
testutil.Equals(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime)
testutil.Equals(t, expBlocks[len(expBlocks)-1].MaxTime, actBlocks[len(actBlocks)-1].meta.MaxTime)
}
func TestSizeRetention(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blocks := []*BlockMeta{
{MinTime: 100, MaxTime: 200}, // Oldest block
{MinTime: 200, MaxTime: 300},
{MinTime: 300, MaxTime: 400},
{MinTime: 400, MaxTime: 500},
{MinTime: 500, MaxTime: 600}, // Newest Block
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(100, 10, m.MinTime, m.MaxTime))
}
headBlocks := []*BlockMeta{
{MinTime: 700, MaxTime: 800},
}
// Add some data to the WAL.
headApp := db.Head().Appender()
for _, m := range headBlocks {
series := genSeries(100, 10, m.MinTime, m.MaxTime)
for _, s := range series {
it := s.Iterator()
for it.Next() {
tim, v := it.At()
_, err := headApp.Add(s.Labels(), tim, v)
testutil.Ok(t, err)
}
testutil.Ok(t, it.Err())
}
}
testutil.Ok(t, headApp.Commit())
// Test that registered size matches the actual disk size.
testutil.Ok(t, db.reload()) // Reload the db to register the new db size.
testutil.Equals(t, len(blocks), len(db.Blocks())) // Ensure all blocks are registered.
blockSize := int64(prom_testutil.ToFloat64(db.metrics.blocksBytes)) // Use the actual internal metrics.
walSize, err := db.Head().wal.Size()
testutil.Ok(t, err)
// Expected size should take into account block size + WAL size
expSize := blockSize + walSize
actSize, err := fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, expSize, actSize, "registered size doesn't match actual disk size")
// Create a WAL checkpoint, and compare sizes.
first, last, err := db.Head().wal.Segments()
testutil.Ok(t, err)
_, err = wal.Checkpoint(db.Head().wal, first, last-1, func(x uint64) bool { return false }, 0)
testutil.Ok(t, err)
blockSize = int64(prom_testutil.ToFloat64(db.metrics.blocksBytes)) // Use the actual internal metrics.
walSize, err = db.Head().wal.Size()
testutil.Ok(t, err)
expSize = blockSize + walSize
actSize, err = fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, expSize, actSize, "registered size doesn't match actual disk size")
// Decrease the max bytes limit so that a delete is triggered.
// Check total size, total count and check that the oldest block was deleted.
firstBlockSize := db.Blocks()[0].Size()
sizeLimit := actSize - firstBlockSize
db.opts.MaxBytes = sizeLimit // Set the new db size limit one block smaller that the actual size.
testutil.Ok(t, db.reload()) // Reload the db to register the new db size.
expBlocks := blocks[1:]
actBlocks := db.Blocks()
blockSize = int64(prom_testutil.ToFloat64(db.metrics.blocksBytes))
walSize, err = db.Head().wal.Size()
testutil.Ok(t, err)
// Expected size should take into account block size + WAL size
expSize = blockSize + walSize
actRetentionCount := int(prom_testutil.ToFloat64(db.metrics.sizeRetentionCount))
actSize, err = fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, 1, actRetentionCount, "metric retention count mismatch")
testutil.Equals(t, actSize, expSize, "metric db size doesn't match actual disk size")
testutil.Assert(t, expSize <= sizeLimit, "actual size (%v) is expected to be less than or equal to limit (%v)", expSize, sizeLimit)
testutil.Equals(t, len(blocks)-1, len(actBlocks), "new block count should be decreased from:%v to:%v", len(blocks), len(blocks)-1)
testutil.Equals(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime, "maxT mismatch of the first block")
testutil.Equals(t, expBlocks[len(expBlocks)-1].MaxTime, actBlocks[len(actBlocks)-1].meta.MaxTime, "maxT mismatch of the last block")
}
func TestSizeRetentionMetric(t *testing.T) {
cases := []struct {
maxBytes int64
expMaxBytes int64
}{
{maxBytes: 1000, expMaxBytes: 1000},
{maxBytes: 0, expMaxBytes: 0},
{maxBytes: -1000, expMaxBytes: 0},
}
for _, c := range cases {
db, closeFn := openTestDB(t, &Options{
MaxBytes: c.maxBytes,
}, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
actMaxBytes := int64(prom_testutil.ToFloat64(db.metrics.maxBytes))
testutil.Equals(t, actMaxBytes, c.expMaxBytes, "metric retention limit bytes mismatch")
}
}
func TestNotMatcherSelectsLabelsUnsetSeries(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
labelpairs := []labels.Labels{
labels.FromStrings("a", "abcd", "b", "abcde"),
labels.FromStrings("labelname", "labelvalue"),
}
app := db.Appender()
for _, lbls := range labelpairs {
_, err := app.Add(lbls, 0, 1)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
cases := []struct {
selector labels.Selector
series []labels.Labels
}{{
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotEqual, "lname", "lvalue"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchEqual, "a", "abcd"),
labels.MustNewMatcher(labels.MatchNotEqual, "b", "abcde"),
},
series: []labels.Labels{},
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchEqual, "a", "abcd"),
labels.MustNewMatcher(labels.MatchNotEqual, "b", "abc"),
},
series: []labels.Labels{labelpairs[0]},
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "a", "abd.*"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "a", "abc.*"),
},
series: labelpairs[1:],
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "c", "abd.*"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "labelname", "labelvalue"),
},
series: labelpairs[:1],
}}
q, err := db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, q.Close()) }()
for _, c := range cases {
ss, ws, err := q.Select(nil, c.selector...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
lres, err := expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, c.series, lres)
}
}
func expandSeriesSet(ss storage.SeriesSet) ([]labels.Labels, error) {
result := []labels.Labels{}
for ss.Next() {
result = append(result, ss.At().Labels())
}
return result, ss.Err()
}
func TestOverlappingBlocksDetectsAllOverlaps(t *testing.T) {
// Create 10 blocks that does not overlap (0-10, 10-20, ..., 100-110) but in reverse order to ensure our algorithm
// will handle that.
var metas = make([]BlockMeta, 11)
for i := 10; i >= 0; i-- {
metas[i] = BlockMeta{MinTime: int64(i * 10), MaxTime: int64((i + 1) * 10)}
}
testutil.Assert(t, len(OverlappingBlocks(metas)) == 0, "we found unexpected overlaps")
// Add overlapping blocks. We've to establish order again since we aren't interested
// in trivial overlaps caused by unorderedness.
add := func(ms ...BlockMeta) []BlockMeta {
repl := append(append([]BlockMeta{}, metas...), ms...)
sort.Slice(repl, func(i, j int) bool {
return repl[i].MinTime < repl[j].MinTime
})
return repl
}
// o1 overlaps with 10-20.
o1 := BlockMeta{MinTime: 15, MaxTime: 17}
testutil.Equals(t, Overlaps{
{Min: 15, Max: 17}: {metas[1], o1},
}, OverlappingBlocks(add(o1)))
// o2 overlaps with 20-30 and 30-40.
o2 := BlockMeta{MinTime: 21, MaxTime: 31}
testutil.Equals(t, Overlaps{
{Min: 21, Max: 30}: {metas[2], o2},
{Min: 30, Max: 31}: {o2, metas[3]},
}, OverlappingBlocks(add(o2)))
// o3a and o3b overlaps with 30-40 and each other.
o3a := BlockMeta{MinTime: 33, MaxTime: 39}
o3b := BlockMeta{MinTime: 34, MaxTime: 36}
testutil.Equals(t, Overlaps{
{Min: 34, Max: 36}: {metas[3], o3a, o3b},
}, OverlappingBlocks(add(o3a, o3b)))
// o4 is 1:1 overlap with 50-60.
o4 := BlockMeta{MinTime: 50, MaxTime: 60}
testutil.Equals(t, Overlaps{
{Min: 50, Max: 60}: {metas[5], o4},
}, OverlappingBlocks(add(o4)))
// o5 overlaps with 60-70, 70-80 and 80-90.
o5 := BlockMeta{MinTime: 61, MaxTime: 85}
testutil.Equals(t, Overlaps{
{Min: 61, Max: 70}: {metas[6], o5},
{Min: 70, Max: 80}: {o5, metas[7]},
{Min: 80, Max: 85}: {o5, metas[8]},
}, OverlappingBlocks(add(o5)))
// o6a overlaps with 90-100, 100-110 and o6b, o6b overlaps with 90-100 and o6a.
o6a := BlockMeta{MinTime: 92, MaxTime: 105}
o6b := BlockMeta{MinTime: 94, MaxTime: 99}
testutil.Equals(t, Overlaps{
{Min: 94, Max: 99}: {metas[9], o6a, o6b},
{Min: 100, Max: 105}: {o6a, metas[10]},
}, OverlappingBlocks(add(o6a, o6b)))
// All together.
testutil.Equals(t, Overlaps{
{Min: 15, Max: 17}: {metas[1], o1},
{Min: 21, Max: 30}: {metas[2], o2}, {Min: 30, Max: 31}: {o2, metas[3]},
{Min: 34, Max: 36}: {metas[3], o3a, o3b},
{Min: 50, Max: 60}: {metas[5], o4},
{Min: 61, Max: 70}: {metas[6], o5}, {Min: 70, Max: 80}: {o5, metas[7]}, {Min: 80, Max: 85}: {o5, metas[8]},
{Min: 94, Max: 99}: {metas[9], o6a, o6b}, {Min: 100, Max: 105}: {o6a, metas[10]},
}, OverlappingBlocks(add(o1, o2, o3a, o3b, o4, o5, o6a, o6b)))
// Additional case.
var nc1 []BlockMeta
nc1 = append(nc1, BlockMeta{MinTime: 1, MaxTime: 5})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 6})
nc1 = append(nc1, BlockMeta{MinTime: 3, MaxTime: 5})
nc1 = append(nc1, BlockMeta{MinTime: 5, MaxTime: 7})
nc1 = append(nc1, BlockMeta{MinTime: 7, MaxTime: 10})
nc1 = append(nc1, BlockMeta{MinTime: 8, MaxTime: 9})
testutil.Equals(t, Overlaps{
{Min: 2, Max: 3}: {nc1[0], nc1[1], nc1[2], nc1[3], nc1[4], nc1[5]}, // 1-5, 2-3, 2-3, 2-3, 2-3, 2,6
{Min: 3, Max: 5}: {nc1[0], nc1[5], nc1[6]}, // 1-5, 2-6, 3-5
{Min: 5, Max: 6}: {nc1[5], nc1[7]}, // 2-6, 5-7
{Min: 8, Max: 9}: {nc1[8], nc1[9]}, // 7-10, 8-9
}, OverlappingBlocks(nc1))
}
// Regression test for https://github.com/prometheus/prometheus/tsdb/issues/347
func TestChunkAtBlockBoundary(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
label := labels.FromStrings("foo", "bar")
for i := int64(0); i < 3; i++ {
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
_, err = app.Add(label, i*blockRange+1000, 0)
testutil.Ok(t, err)
}
err := app.Commit()
testutil.Ok(t, err)
err = db.Compact()
testutil.Ok(t, err)
for _, block := range db.Blocks() {
r, err := block.Index()
testutil.Ok(t, err)
defer r.Close()
meta := block.Meta()
k, v := index.AllPostingsKey()
p, err := r.Postings(k, v)
testutil.Ok(t, err)
var (
lset labels.Labels
chks []chunks.Meta
)
chunkCount := 0
for p.Next() {
err = r.Series(p.At(), &lset, &chks)
testutil.Ok(t, err)
for _, c := range chks {
testutil.Assert(t, meta.MinTime <= c.MinTime && c.MaxTime <= meta.MaxTime,
"chunk spans beyond block boundaries: [block.MinTime=%d, block.MaxTime=%d]; [chunk.MinTime=%d, chunk.MaxTime=%d]",
meta.MinTime, meta.MaxTime, c.MinTime, c.MaxTime)
chunkCount++
}
}
testutil.Assert(t, chunkCount == 1, "expected 1 chunk in block %s, got %d", meta.ULID, chunkCount)
}
}
func TestQuerierWithBoundaryChunks(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
label := labels.FromStrings("foo", "bar")
for i := int64(0); i < 5; i++ {
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
}
err := app.Commit()
testutil.Ok(t, err)
err = db.Compact()
testutil.Ok(t, err)
testutil.Assert(t, len(db.blocks) >= 3, "invalid test, less than three blocks in DB")
q, err := db.Querier(context.TODO(), blockRange, 2*blockRange)
testutil.Ok(t, err)
defer q.Close()
// The requested interval covers 2 blocks, so the querier should contain 2 blocks.
count := len(q.(*querier).blocks)
testutil.Assert(t, count == 2, "expected 2 blocks in querier, got %d", count)
}
// TestInitializeHeadTimestamp ensures that the h.minTime is set properly.
// - no blocks no WAL: set to the time of the first appended sample
// - no blocks with WAL: set to the smallest sample from the WAL
// - with blocks no WAL: set to the last block maxT
// - with blocks with WAL: same as above
func TestInitializeHeadTimestamp(t *testing.T) {
t.Run("clean", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
// Should be set to init values if no WAL or blocks exist so far.
testutil.Equals(t, int64(math.MaxInt64), db.head.MinTime())
testutil.Equals(t, int64(math.MinInt64), db.head.MaxTime())
// First added sample initializes the writable range.
app := db.Appender()
_, err = app.Add(labels.FromStrings("a", "b"), 1000, 1)
testutil.Ok(t, err)
testutil.Equals(t, int64(1000), db.head.MinTime())
testutil.Equals(t, int64(1000), db.head.MaxTime())
})
t.Run("wal-only", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
testutil.Ok(t, os.MkdirAll(path.Join(dir, "wal"), 0777))
w, err := wal.New(nil, nil, path.Join(dir, "wal"), false)
testutil.Ok(t, err)
var enc record.Encoder
err = w.Log(
enc.Series([]record.RefSeries{
{Ref: 123, Labels: labels.FromStrings("a", "1")},
{Ref: 124, Labels: labels.FromStrings("a", "2")},
}, nil),
enc.Samples([]record.RefSample{
{Ref: 123, T: 5000, V: 1},
{Ref: 124, T: 15000, V: 1},
}, nil),
)
testutil.Ok(t, err)
testutil.Ok(t, w.Close())
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(5000), db.head.MinTime())
testutil.Equals(t, int64(15000), db.head.MaxTime())
})
t.Run("existing-block", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
createBlock(t, dir, genSeries(1, 1, 1000, 2000))
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(2000), db.head.MinTime())
testutil.Equals(t, int64(2000), db.head.MaxTime())
})
t.Run("existing-block-and-wal", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
createBlock(t, dir, genSeries(1, 1, 1000, 6000))
testutil.Ok(t, os.MkdirAll(path.Join(dir, "wal"), 0777))
w, err := wal.New(nil, nil, path.Join(dir, "wal"), false)
testutil.Ok(t, err)
var enc record.Encoder
err = w.Log(
enc.Series([]record.RefSeries{
{Ref: 123, Labels: labels.FromStrings("a", "1")},
{Ref: 124, Labels: labels.FromStrings("a", "2")},
}, nil),
enc.Samples([]record.RefSample{
{Ref: 123, T: 5000, V: 1},
{Ref: 124, T: 15000, V: 1},
}, nil),
)
testutil.Ok(t, err)
testutil.Ok(t, w.Close())
r := prometheus.NewRegistry()
db, err := Open(dir, nil, r, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(6000), db.head.MinTime())
testutil.Equals(t, int64(15000), db.head.MaxTime())
// Check that old series has been GCed.
testutil.Equals(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.series))
})
}
func TestNoEmptyBlocks(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
db.DisableCompactions()
rangeToTriggerCompaction := db.compactor.(*LeveledCompactor).ranges[0]/2*3 - 1
defaultLabel := labels.FromStrings("foo", "bar")
defaultMatcher := labels.MustNewMatcher(labels.MatchRegexp, "", ".*")
t.Run("Test no blocks after compact with empty head.", func(t *testing.T) {
testutil.Ok(t, db.Compact())
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 0, len(actBlocks))
testutil.Equals(t, 0, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "no compaction should be triggered here")
})
t.Run("Test no blocks after deleting all samples from head.", func(t *testing.T) {
app := db.Appender()
_, err := app.Add(defaultLabel, 1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, 2, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, 3+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 0, len(actBlocks))
app = db.Appender()
_, err = app.Add(defaultLabel, 1, 0)
testutil.Assert(t, err == ErrOutOfBounds, "the head should be truncated so no samples in the past should be allowed")
// Adding new blocks.
currentTime := db.Head().MaxTime()
_, err = app.Add(defaultLabel, currentTime, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Compact())
testutil.Equals(t, 2, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
actBlocks, err = blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Assert(t, len(actBlocks) == 1, "No blocks created when compacting with >0 samples")
})
t.Run(`When no new block is created from head, and there are some blocks on disk
compaction should not run into infinite loop (was seen during development).`, func(t *testing.T) {
oldBlocks := db.Blocks()
app := db.Appender()
currentTime := db.Head().MaxTime()
_, err := app.Add(defaultLabel, currentTime, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.head.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 3, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
testutil.Equals(t, oldBlocks, db.Blocks())
})
t.Run("Test no blocks remaining after deleting all samples from disk.", func(t *testing.T) {
currentTime := db.Head().MaxTime()
blocks := []*BlockMeta{
{MinTime: currentTime, MaxTime: currentTime + db.compactor.(*LeveledCompactor).ranges[0]},
{MinTime: currentTime + 100, MaxTime: currentTime + 100 + db.compactor.(*LeveledCompactor).ranges[0]},
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(2, 2, m.MinTime, m.MaxTime))
}
oldBlocks := db.Blocks()
testutil.Ok(t, db.reload()) // Reload the db to register the new blocks.
testutil.Equals(t, len(blocks)+len(oldBlocks), len(db.Blocks())) // Ensure all blocks are registered.
testutil.Ok(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 5, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here once for each block that have tombstones")
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 1, len(actBlocks), "All samples are deleted. Only the most recent block should remain after compaction.")
})
}
func TestDB_LabelNames(t *testing.T) {
tests := []struct {
// Add 'sampleLabels1' -> Test Head -> Compact -> Test Disk ->
// -> Add 'sampleLabels2' -> Test Head+Disk
sampleLabels1 [][2]string // For checking head and disk separately.
// To test Head+Disk, sampleLabels2 should have
// at least 1 unique label name which is not in sampleLabels1.
sampleLabels2 [][2]string // // For checking head and disk together.
exp1 []string // after adding sampleLabels1.
exp2 []string // after adding sampleLabels1 and sampleLabels2.
}{
{
sampleLabels1: [][2]string{
{"name1", "1"},
{"name3", "3"},
{"name2", "2"},
},
sampleLabels2: [][2]string{
{"name4", "4"},
{"name1", "1"},
},
exp1: []string{"name1", "name2", "name3"},
exp2: []string{"name1", "name2", "name3", "name4"},
},
{
sampleLabels1: [][2]string{
{"name2", "2"},
{"name1", "1"},
{"name2", "2"},
},
sampleLabels2: [][2]string{
{"name6", "6"},
{"name0", "0"},
},
exp1: []string{"name1", "name2"},
exp2: []string{"name0", "name1", "name2", "name6"},
},
}
blockRange := int64(1000)
// Appends samples into the database.
appendSamples := func(db *DB, mint, maxt int64, sampleLabels [][2]string) {
t.Helper()
app := db.Appender()
for i := mint; i <= maxt; i++ {
for _, tuple := range sampleLabels {
label := labels.FromStrings(tuple[0], tuple[1])
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
}
}
err := app.Commit()
testutil.Ok(t, err)
}
for _, tst := range tests {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
appendSamples(db, 0, 4, tst.sampleLabels1)
// Testing head.
headIndexr, err := db.head.Index()
testutil.Ok(t, err)
labelNames, err := headIndexr.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, tst.exp1, labelNames)
testutil.Ok(t, headIndexr.Close())
// Testing disk.
err = db.Compact()
testutil.Ok(t, err)
// All blocks have same label names, hence check them individually.
// No need to aggregate and check.
for _, b := range db.Blocks() {
blockIndexr, err := b.Index()
testutil.Ok(t, err)
labelNames, err = blockIndexr.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, tst.exp1, labelNames)
testutil.Ok(t, blockIndexr.Close())
}
// Adding more samples to head with new label names
// so that we can test (head+disk).LabelNames() (the union).
appendSamples(db, 5, 9, tst.sampleLabels2)
// Testing DB (union).
q, err := db.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
var ws storage.Warnings
labelNames, ws, err = q.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
testutil.Ok(t, q.Close())
testutil.Equals(t, tst.exp2, labelNames)
}
}
func TestCorrectNumTombstones(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
defaultLabel := labels.FromStrings("foo", "bar")
defaultMatcher := labels.MustNewMatcher(labels.MatchEqual, defaultLabel[0].Name, defaultLabel[0].Value)
app := db.Appender()
for i := int64(0); i < 3; i++ {
for j := int64(0); j < 15; j++ {
_, err := app.Add(defaultLabel, i*blockRange+j, 0)
testutil.Ok(t, err)
}
}
testutil.Ok(t, app.Commit())
err := db.Compact()
testutil.Ok(t, err)
testutil.Equals(t, 1, len(db.blocks))
testutil.Ok(t, db.Delete(0, 1, defaultMatcher))
testutil.Equals(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones)
// {0, 1} and {2, 3} are merged to form 1 tombstone.
testutil.Ok(t, db.Delete(2, 3, defaultMatcher))
testutil.Equals(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones)
testutil.Ok(t, db.Delete(5, 6, defaultMatcher))
testutil.Equals(t, uint64(2), db.blocks[0].meta.Stats.NumTombstones)
testutil.Ok(t, db.Delete(9, 11, defaultMatcher))
testutil.Equals(t, uint64(3), db.blocks[0].meta.Stats.NumTombstones)
}
func TestVerticalCompaction(t *testing.T) {
cases := []struct {
blockSeries [][]storage.Series
expSeries map[string][]tsdbutil.Sample
expBlockNum int
expOverlappingBlocks int
}{
// Case 0
// |--------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 1
// |-------------------------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
sample{11, 0}, sample{13, 0}, sample{17, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 0},
sample{13, 0}, sample{17, 0},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 2
// |-------------------------------|
// |------------|
// |--------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
sample{11, 0}, sample{13, 0}, sample{17, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{11, 0}, sample{13, 0},
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 3
// |-------------------|
// |--------------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{5, 99}, sample{6, 99}, sample{7, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 99}, sample{6, 99}, sample{7, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{14, 59},
sample{15, 59}, sample{16, 99}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 4
// |-------------------------------------|
// |------------|
// |-------------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 5: series are merged properly when there are multiple series.
// |-------------------------------------|
// |------------|
// |-------------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
newSeries(map[string]string{"b": "c"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
},
{
newSeries(map[string]string{"__name__": "a"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"aa": "bb"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
newSeries(map[string]string{"aa": "bb"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{
`{__name__="a"}`: {
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
},
`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
},
`{aa="bb"}`: {
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
},
`{b="c"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
},
`{c="d"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
},
},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 6
// |--------------|
// |----------------|
// |--------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{20, 0}, sample{21, 0}, sample{22, 0}, sample{24, 0},
sample{25, 0}, sample{27, 0}, sample{28, 0}, sample{29, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{23, 99}, sample{25, 99}, sample{26, 99}, sample{27, 99},
sample{28, 99}, sample{29, 99}, sample{30, 99}, sample{31, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
sample{20, 0}, sample{21, 0}, sample{22, 0}, sample{23, 99},
sample{24, 0}, sample{25, 99}, sample{26, 99}, sample{27, 99},
sample{28, 99}, sample{29, 99}, sample{30, 99}, sample{31, 99},
}},
expBlockNum: 2,
expOverlappingBlocks: 2,
},
}
defaultMatcher := labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*")
for _, c := range cases {
if ok := t.Run("", func(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "data")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(tmpdir))
}()
for _, series := range c.blockSeries {
createBlock(t, tmpdir, series)
}
opts := DefaultOptions()
opts.AllowOverlappingBlocks = true
db, err := Open(tmpdir, nil, nil, opts)
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, db.Close())
}()
db.DisableCompactions()
testutil.Assert(t, len(db.blocks) == len(c.blockSeries), "Wrong number of blocks [before compact].")
// Vertical Query Merging test.
querier, err := db.Querier(context.TODO(), 0, 100)
testutil.Ok(t, err)
actSeries := query(t, querier, defaultMatcher)
testutil.Equals(t, c.expSeries, actSeries)
// Vertical compaction.
lc := db.compactor.(*LeveledCompactor)
testutil.Equals(t, 0, int(prom_testutil.ToFloat64(lc.metrics.overlappingBlocks)), "overlapping blocks count should be still 0 here")
err = db.Compact()
testutil.Ok(t, err)
testutil.Equals(t, c.expBlockNum, len(db.Blocks()), "Wrong number of blocks [after compact]")
testutil.Equals(t, c.expOverlappingBlocks, int(prom_testutil.ToFloat64(lc.metrics.overlappingBlocks)), "overlapping blocks count mismatch")
// Query test after merging the overlapping blocks.
querier, err = db.Querier(context.TODO(), 0, 100)
testutil.Ok(t, err)
actSeries = query(t, querier, defaultMatcher)
testutil.Equals(t, c.expSeries, actSeries)
}); !ok {
return
}
}
}
// TestBlockRanges checks the following use cases:
// - No samples can be added with timestamps lower than the last block maxt.
// - The compactor doesn't create overlapping blocks
// even when the last blocks is not within the default boundaries.
// - Lower boundary is based on the smallest sample in the head and
// upper boundary is rounded to the configured block range.
//
// This ensures that a snapshot that includes the head and creates a block with a custom time range
// will not overlap with the first block created by the next compaction.
func TestBlockRanges(t *testing.T) {
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
dir, err := ioutil.TempDir("", "test_storage")
testutil.Ok(t, err)
// Test that the compactor doesn't create overlapping blocks
// when a non standard block already exists.
firstBlockMaxT := int64(3)
createBlock(t, dir, genSeries(1, 1, 0, firstBlockMaxT))
db, err := open(dir, logger, nil, DefaultOptions(), []int64{10000})
testutil.Ok(t, err)
rangeToTriggerCompaction := db.compactor.(*LeveledCompactor).ranges[0]/2*3 + 1
defer func() {
os.RemoveAll(dir)
}()
app := db.Appender()
lbl := labels.Labels{{Name: "a", Value: "b"}}
_, err = app.Add(lbl, firstBlockMaxT-1, rand.Float64())
if err == nil {
t.Fatalf("appending a sample with a timestamp covered by a previous block shouldn't be possible")
}
_, err = app.Add(lbl, firstBlockMaxT+1, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, firstBlockMaxT+2, rand.Float64())
testutil.Ok(t, err)
secondBlockMaxt := firstBlockMaxT + rangeToTriggerCompaction
_, err = app.Add(lbl, secondBlockMaxt, rand.Float64()) // Add samples to trigger a new compaction
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
for x := 0; x < 100; x++ {
if len(db.Blocks()) == 2 {
break
}
time.Sleep(100 * time.Millisecond)
}
testutil.Equals(t, 2, len(db.Blocks()), "no new block created after the set timeout")
if db.Blocks()[0].Meta().MaxTime > db.Blocks()[1].Meta().MinTime {
t.Fatalf("new block overlaps old:%v,new:%v", db.Blocks()[0].Meta(), db.Blocks()[1].Meta())
}
// Test that wal records are skipped when an existing block covers the same time ranges
// and compaction doesn't create an overlapping block.
db.DisableCompactions()
_, err = app.Add(lbl, secondBlockMaxt+1, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+2, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+3, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+4, rand.Float64())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Close())
thirdBlockMaxt := secondBlockMaxt + 2
createBlock(t, dir, genSeries(1, 1, secondBlockMaxt+1, thirdBlockMaxt))
db, err = open(dir, logger, nil, DefaultOptions(), []int64{10000})
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, 3, len(db.Blocks()), "db doesn't include expected number of blocks")
testutil.Equals(t, db.Blocks()[2].Meta().MaxTime, thirdBlockMaxt, "unexpected maxt of the last block")
app = db.Appender()
_, err = app.Add(lbl, thirdBlockMaxt+rangeToTriggerCompaction, rand.Float64()) // Trigger a compaction
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
for x := 0; x < 100; x++ {
if len(db.Blocks()) == 4 {
break
}
time.Sleep(100 * time.Millisecond)
}
testutil.Equals(t, 4, len(db.Blocks()), "no new block created after the set timeout")
if db.Blocks()[2].Meta().MaxTime > db.Blocks()[3].Meta().MinTime {
t.Fatalf("new block overlaps old:%v,new:%v", db.Blocks()[2].Meta(), db.Blocks()[3].Meta())
}
}
// TestDBReadOnly ensures that opening a DB in readonly mode doesn't modify any files on the disk.
// It also checks that the API calls return equivalent results as a normal db.Open() mode.
func TestDBReadOnly(t *testing.T) {
var (
dbDir string
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
expBlocks []*Block
expSeries map[string][]tsdbutil.Sample
expSeriesCount int
expDBHash []byte
matchAll = labels.MustNewMatcher(labels.MatchEqual, "", "")
err error
)
// Bootstrap the db.
{
dbDir, err = ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
dbBlocks := []*BlockMeta{
{MinTime: 10, MaxTime: 11},
{MinTime: 11, MaxTime: 12},
{MinTime: 12, MaxTime: 13},
}
for _, m := range dbBlocks {
createBlock(t, dbDir, genSeries(1, 1, m.MinTime, m.MaxTime))
}
expSeriesCount++
}
// Open a normal db to use for a comparison.
{
dbWritable, err := Open(dbDir, logger, nil, nil)
testutil.Ok(t, err)
dbWritable.DisableCompactions()
dbSizeBeforeAppend, err := fileutil.DirSize(dbWritable.Dir())
testutil.Ok(t, err)
app := dbWritable.Appender()
_, err = app.Add(labels.FromStrings("foo", "bar"), dbWritable.Head().MaxTime()+1, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
expSeriesCount++
expBlocks = dbWritable.Blocks()
expDbSize, err := fileutil.DirSize(dbWritable.Dir())
testutil.Ok(t, err)
testutil.Assert(t, expDbSize > dbSizeBeforeAppend, "db size didn't increase after an append")
q, err := dbWritable.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
expSeries = query(t, q, matchAll)
testutil.Ok(t, dbWritable.Close()) // Close here to allow getting the dir hash for windows.
expDBHash = testutil.DirHash(t, dbWritable.Dir())
}
// Open a read only db and ensure that the API returns the same result as the normal DB.
{
dbReadOnly, err := OpenDBReadOnly(dbDir, logger)
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, dbReadOnly.Close())
}()
blocks, err := dbReadOnly.Blocks()
testutil.Ok(t, err)
testutil.Equals(t, len(expBlocks), len(blocks))
for i, expBlock := range expBlocks {
testutil.Equals(t, expBlock.Meta(), blocks[i].Meta(), "block meta mismatch")
}
q, err := dbReadOnly.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
readOnlySeries := query(t, q, matchAll)
readOnlyDBHash := testutil.DirHash(t, dbDir)
testutil.Equals(t, expSeriesCount, len(readOnlySeries), "total series mismatch")
testutil.Equals(t, expSeries, readOnlySeries, "series mismatch")
testutil.Equals(t, expDBHash, readOnlyDBHash, "after all read operations the db hash should remain the same")
}
}
// TestDBReadOnlyClosing ensures that after closing the db
// all api methods return an ErrClosed.
func TestDBReadOnlyClosing(t *testing.T) {
dbDir, err := ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
db, err := OpenDBReadOnly(dbDir, log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr)))
testutil.Ok(t, err)
testutil.Ok(t, db.Close())
testutil.Equals(t, db.Close(), ErrClosed)
_, err = db.Blocks()
testutil.Equals(t, err, ErrClosed)
_, err = db.Querier(context.TODO(), 0, 1)
testutil.Equals(t, err, ErrClosed)
}
func TestDBReadOnly_FlushWAL(t *testing.T) {
var (
dbDir string
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
err error
maxt int
)
// Bootstrap the db.
{
dbDir, err = ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
// Append data to the WAL.
db, err := Open(dbDir, logger, nil, nil)
testutil.Ok(t, err)
db.DisableCompactions()
app := db.Appender()
maxt = 1000
for i := 0; i < maxt; i++ {
_, err := app.Add(labels.FromStrings(defaultLabelName, "flush"), int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
defer func() { testutil.Ok(t, db.Close()) }()
}
// Flush WAL.
db, err := OpenDBReadOnly(dbDir, logger)
testutil.Ok(t, err)
flush, err := ioutil.TempDir("", "flush")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(flush))
}()
testutil.Ok(t, db.FlushWAL(flush))
testutil.Ok(t, db.Close())
// Reopen the DB from the flushed WAL block.
db, err = OpenDBReadOnly(flush, logger)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
blocks, err := db.Blocks()
testutil.Ok(t, err)
testutil.Equals(t, len(blocks), 1)
querier, err := db.Querier(context.TODO(), 0, int64(maxt)-1)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// Sum the values.
seriesSet, ws, err := querier.Select(nil, labels.MustNewMatcher(labels.MatchEqual, defaultLabelName, "flush"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
testutil.Equals(t, 1000.0, sum)
}
// TestChunkWriter_ReadAfterWrite ensures that chunk segment are cut at the set segment size and
// that the resulted segments includes the expected chunks data.
func TestChunkWriter_ReadAfterWrite(t *testing.T) {
chk1 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 1}})
chk2 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 2}})
chk3 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 3}})
chk4 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 4}})
chk5 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 5}})
chunkSize := len(chk1.Chunk.Bytes()) + chunks.MaxChunkLengthFieldSize + chunks.ChunkEncodingSize + crc32.Size
tests := []struct {
chks [][]chunks.Meta
segmentSize,
expSegmentsCount int
expSegmentSizes []int
}{
// 0:Last chunk ends at the segment boundary so
// all chunks should fit in a single segment.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
chk2,
chk3,
},
},
segmentSize: 3 * chunkSize,
expSegmentSizes: []int{3 * chunkSize},
expSegmentsCount: 1,
},
// 1:Two chunks can fit in a single segment so the last one should result in a new segment.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
chk2,
chk3,
chk4,
chk5,
},
},
segmentSize: 2 * chunkSize,
expSegmentSizes: []int{2 * chunkSize, 2 * chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 2:When the segment size is smaller than the size of 2 chunks
// the last segment should still create a new segment.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
chk2,
chk3,
},
},
segmentSize: 2*chunkSize - 1,
expSegmentSizes: []int{chunkSize, chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 3:When the segment is smaller than a single chunk
// it should still be written by ignoring the max segment size.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
},
},
segmentSize: chunkSize - 1,
expSegmentSizes: []int{chunkSize},
expSegmentsCount: 1,
},
// 4:All chunks are bigger than the max segment size, but
// these should still be written even when this will result in bigger segment than the set size.
// Each segment will hold a single chunk.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
chk2,
chk3,
},
},
segmentSize: 1,
expSegmentSizes: []int{chunkSize, chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 5:Adding multiple batches of chunks.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
chk2,
chk3,
},
[]chunks.Meta{
chk4,
chk5,
},
},
segmentSize: 3 * chunkSize,
expSegmentSizes: []int{3 * chunkSize, 2 * chunkSize},
expSegmentsCount: 2,
},
// 6:Adding multiple batches of chunks.
{
chks: [][]chunks.Meta{
[]chunks.Meta{
chk1,
},
[]chunks.Meta{
chk2,
chk3,
},
[]chunks.Meta{
chk4,
},
},
segmentSize: 2 * chunkSize,
expSegmentSizes: []int{2 * chunkSize, 2 * chunkSize},
expSegmentsCount: 2,
},
}
for i, test := range tests {
t.Run(strconv.Itoa(i), func(t *testing.T) {
tempDir, err := ioutil.TempDir("", "test_chunk_writer")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tempDir)) }()
chunkw, err := chunks.NewWriterWithSegSize(tempDir, chunks.SegmentHeaderSize+int64(test.segmentSize))
testutil.Ok(t, err)
for _, chks := range test.chks {
testutil.Ok(t, chunkw.WriteChunks(chks...))
}
testutil.Ok(t, chunkw.Close())
files, err := ioutil.ReadDir(tempDir)
testutil.Ok(t, err)
testutil.Equals(t, test.expSegmentsCount, len(files), "expected segments count mismatch")
// Verify that all data is written to the segments.
sizeExp := 0
sizeAct := 0
for _, chks := range test.chks {
for _, chk := range chks {
l := make([]byte, binary.MaxVarintLen32)
sizeExp += binary.PutUvarint(l, uint64(len(chk.Chunk.Bytes()))) // The length field.
sizeExp += chunks.ChunkEncodingSize
sizeExp += len(chk.Chunk.Bytes()) // The data itself.
sizeExp += crc32.Size // The 4 bytes of crc32
}
}
sizeExp += test.expSegmentsCount * chunks.SegmentHeaderSize // The segment header bytes.
for i, f := range files {
size := int(f.Size())
// Verify that the segment is the same or smaller than the expected size.
testutil.Assert(t, chunks.SegmentHeaderSize+test.expSegmentSizes[i] >= size, "Segment:%v should NOT be bigger than:%v actual:%v", i, chunks.SegmentHeaderSize+test.expSegmentSizes[i], size)
sizeAct += size
}
testutil.Equals(t, sizeExp, sizeAct)
// Check the content of the chunks.
r, err := chunks.NewDirReader(tempDir, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, r.Close()) }()
for _, chks := range test.chks {
for _, chkExp := range chks {
chkAct, err := r.Chunk(chkExp.Ref)
testutil.Ok(t, err)
testutil.Equals(t, chkExp.Chunk.Bytes(), chkAct.Bytes())
}
}
})
}
}
// TestChunkReader_ConcurrentReads checks that the chunk result can be read concurrently.
// Regression test for https://github.com/prometheus/prometheus/pull/6514.
func TestChunkReader_ConcurrentReads(t *testing.T) {
chks := []chunks.Meta{
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 1}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 2}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 3}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 4}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 5}}),
}
tempDir, err := ioutil.TempDir("", "test_chunk_writer")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tempDir)) }()
chunkw, err := chunks.NewWriter(tempDir)
testutil.Ok(t, err)
testutil.Ok(t, chunkw.WriteChunks(chks...))
testutil.Ok(t, chunkw.Close())
r, err := chunks.NewDirReader(tempDir, nil)
testutil.Ok(t, err)
var wg sync.WaitGroup
for _, chk := range chks {
for i := 0; i < 100; i++ {
wg.Add(1)
go func(chunk chunks.Meta) {
defer wg.Done()
chkAct, err := r.Chunk(chunk.Ref)
testutil.Ok(t, err)
testutil.Equals(t, chunk.Chunk.Bytes(), chkAct.Bytes())
}(chk)
}
wg.Wait()
}
testutil.Ok(t, r.Close())
}
func TestTimeMetrics(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
metrics := &dto.Metric{}
// Check initial values.
testutil.Ok(t, db.metrics.minTime.Write(metrics))
testutil.Equals(t, float64(model.Latest)/1000, metrics.Gauge.GetValue())
testutil.Ok(t, db.metrics.headMinTime.Write(metrics))
testutil.Equals(t, float64(model.Latest)/1000, metrics.Gauge.GetValue())
testutil.Ok(t, db.metrics.headMaxTime.Write(metrics))
testutil.Equals(t, float64(model.Earliest)/1000, metrics.Gauge.GetValue())
app := db.Appender()
app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 1, 1)
app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 2, 1)
app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 3, 1)
testutil.Ok(t, app.Commit())
// Check after adding some samples.
testutil.Ok(t, db.metrics.minTime.Write(metrics))
testutil.Equals(t, 0.001, metrics.Gauge.GetValue())
testutil.Ok(t, db.metrics.headMinTime.Write(metrics))
testutil.Equals(t, 0.001, metrics.Gauge.GetValue())
testutil.Ok(t, db.metrics.headMaxTime.Write(metrics))
testutil.Equals(t, 0.003, metrics.Gauge.GetValue())
}
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