// 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 ( "bufio" "context" "encoding/binary" "fmt" "hash/crc32" "io/ioutil" "math" "math/rand" "os" "path" "path/filepath" "sort" "strconv" "strings" "sync" "testing" "time" "github.com/go-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" "github.com/stretchr/testify/require" "go.uber.org/goleak" "github.com/prometheus/prometheus/pkg/labels" "github.com/prometheus/prometheus/storage" "github.com/prometheus/prometheus/tsdb/chunkenc" "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 TestMain(m *testing.M) { goleak.VerifyTestMain(m, goleak.IgnoreTopFunction("github.com/prometheus/prometheus/tsdb.(*SegmentWAL).cut.func1"), goleak.IgnoreTopFunction("github.com/prometheus/prometheus/tsdb.(*SegmentWAL).cut.func2")) } func openTestDB(t testing.TB, opts *Options, rngs []int64) (db *DB) { tmpdir, err := ioutil.TempDir("", "test") require.NoError(t, err) if len(rngs) == 0 { db, err = Open(tmpdir, nil, nil, opts, nil) } else { opts, rngs = validateOpts(opts, rngs) db, err = open(tmpdir, nil, nil, opts, rngs, nil) } require.NoError(t, err) // Do not Close() the test database by default as it will deadlock on test failures. t.Cleanup(func() { require.NoError(t, os.RemoveAll(tmpdir)) }) return db } // 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 := q.Select(false, nil, matchers...) defer func() { require.NoError(t, q.Close()) }() 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}) } require.NoError(t, it.Err()) if len(samples) == 0 { continue } name := series.Labels().String() result[name] = samples } require.NoError(t, ss.Err()) require.Equal(t, 0, len(ss.Warnings())) return result } // queryChunks runs a matcher query against the querier and fully expands its data. func queryChunks(t testing.TB, q storage.ChunkQuerier, matchers ...*labels.Matcher) map[string][]chunks.Meta { ss := q.Select(false, nil, matchers...) defer func() { require.NoError(t, q.Close()) }() result := map[string][]chunks.Meta{} for ss.Next() { series := ss.At() chks := []chunks.Meta{} it := series.Iterator() for it.Next() { chks = append(chks, it.At()) } require.NoError(t, it.Err()) if len(chks) == 0 { continue } name := series.Labels().String() result[name] = chks } require.NoError(t, ss.Err()) require.Equal(t, 0, len(ss.Warnings())) 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 := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() 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)) } require.NoError(t, db.reloadBlocks()) blocks := db.Blocks() require.Equal(t, 3, len(blocks)) require.Equal(t, metas[1].MinTime, blocks[0].Meta().MinTime) require.Equal(t, metas[1].MaxTime, blocks[0].Meta().MaxTime) require.Equal(t, metas[0].MinTime, blocks[1].Meta().MinTime) require.Equal(t, metas[0].MaxTime, blocks[1].Meta().MaxTime) require.Equal(t, metas[2].MinTime, blocks[2].Meta().MinTime) require.Equal(t, metas[2].MaxTime, blocks[2].Meta().MaxTime) } func TestDataAvailableOnlyAfterCommit(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.FromStrings("foo", "bar"), 0, 0) require.NoError(t, err) querier, err := db.Querier(context.TODO(), 0, 1) require.NoError(t, err) seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) require.Equal(t, map[string][]tsdbutil.Sample{}, seriesSet) err = app.Commit() require.NoError(t, err) querier, err = db.Querier(context.TODO(), 0, 1) require.NoError(t, err) defer querier.Close() seriesSet = query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) require.Equal(t, map[string][]tsdbutil.Sample{`{foo="bar"}`: {sample{t: 0, v: 0}}}, seriesSet) } // TestNoPanicAfterWALCorruption ensures that querying the db after a WAL corruption doesn't cause a panic. // https://github.com/prometheus/prometheus/issues/7548 func TestNoPanicAfterWALCorruption(t *testing.T) { db := openTestDB(t, &Options{WALSegmentSize: 32 * 1024}, nil) // Append until the first mmaped head chunk. // This is to ensure that all samples can be read from the mmaped chunks when the WAL is corrupted. var expSamples []tsdbutil.Sample var maxt int64 ctx := context.Background() { for { app := db.Appender(ctx) _, err := app.Append(0, labels.FromStrings("foo", "bar"), maxt, 0) expSamples = append(expSamples, sample{t: maxt, v: 0}) require.NoError(t, err) require.NoError(t, app.Commit()) mmapedChunks, err := ioutil.ReadDir(mmappedChunksDir(db.Dir())) require.NoError(t, err) if len(mmapedChunks) > 0 { break } maxt++ } require.NoError(t, db.Close()) } // Corrupt the WAL after the first sample of the series so that it has at least one sample and // it is not garbage collected. // The repair deletes all WAL records after the corrupted record and these are read from the mmaped chunk. { walFiles, err := ioutil.ReadDir(path.Join(db.Dir(), "wal")) require.NoError(t, err) f, err := os.OpenFile(path.Join(db.Dir(), "wal", walFiles[0].Name()), os.O_RDWR, 0666) require.NoError(t, err) r := wal.NewReader(bufio.NewReader(f)) require.True(t, r.Next(), "reading the series record") require.True(t, r.Next(), "reading the first sample record") // Write an invalid record header to corrupt everything after the first wal sample. _, err = f.WriteAt([]byte{99}, r.Offset()) require.NoError(t, err) f.Close() } // Query the data. { db, err := Open(db.Dir(), nil, nil, nil, nil) require.NoError(t, err) defer func() { require.NoError(t, db.Close()) }() require.Equal(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.walCorruptionsTotal), "WAL corruption count mismatch") querier, err := db.Querier(context.TODO(), 0, maxt) require.NoError(t, err) seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "", "")) // The last sample should be missing as it was after the WAL segment corruption. require.Equal(t, map[string][]tsdbutil.Sample{`{foo="bar"}`: expSamples[0 : len(expSamples)-1]}, seriesSet) } } func TestDataNotAvailableAfterRollback(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() app := db.Appender(context.Background()) _, err := app.Append(0, labels.FromStrings("foo", "bar"), 0, 0) require.NoError(t, err) err = app.Rollback() require.NoError(t, err) querier, err := db.Querier(context.TODO(), 0, 1) require.NoError(t, err) defer querier.Close() seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) require.Equal(t, map[string][]tsdbutil.Sample{}, seriesSet) } func TestDBAppenderAddRef(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app1 := db.Appender(ctx) ref1, err := app1.Append(0, labels.FromStrings("a", "b"), 123, 0) require.NoError(t, err) // Reference should already work before commit. ref2, err := app1.Append(ref1, nil, 124, 1) require.NoError(t, err) require.Equal(t, ref1, ref2) err = app1.Commit() require.NoError(t, err) app2 := db.Appender(ctx) // first ref should already work in next transaction. ref3, err := app2.Append(ref1, nil, 125, 0) require.NoError(t, err) require.Equal(t, ref1, ref3) ref4, err := app2.Append(ref1, labels.FromStrings("a", "b"), 133, 1) require.NoError(t, err) require.Equal(t, ref1, ref4) // Reference must be valid to add another sample. ref5, err := app2.Append(ref2, nil, 143, 2) require.NoError(t, err) require.Equal(t, ref1, ref5) // Missing labels & invalid refs should fail. _, err = app2.Append(9999999, nil, 1, 1) require.Equal(t, ErrInvalidSample, errors.Cause(err)) require.NoError(t, app2.Commit()) q, err := db.Querier(context.TODO(), 0, 200) require.NoError(t, err) res := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) require.Equal(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 := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app1 := db.Appender(ctx) ref1, err := app1.Append(0, labels.FromStrings("a", "b"), 123, 0) require.NoError(t, err) // Construct labels manually so there is an empty label. ref2, err := app1.Append(0, labels.Labels{labels.Label{Name: "a", Value: "b"}, labels.Label{Name: "c", Value: ""}}, 124, 0) require.NoError(t, err) // Should be the same series. require.Equal(t, ref1, ref2) err = app1.Commit() require.NoError(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 := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) smpls := make([]float64, numSamples) for i := int64(0); i < numSamples; i++ { smpls[i] = rand.Float64() app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i]) } require.NoError(t, app.Commit()) // TODO(gouthamve): Reset the tombstones somehow. // Delete the ranges. for _, r := range c.Intervals { require.NoError(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))) } // Compare the result. q, err := db.Querier(context.TODO(), 0, numSamples) require.NoError(t, err) res := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) expSamples := make([]tsdbutil.Sample, 0, len(c.remaint)) for _, ts := range c.remaint { expSamples = append(expSamples, sample{ts, smpls[ts]}) } expss := newMockSeriesSet([]storage.Series{ storage.NewListSeries(labels.FromStrings("a", "b"), expSamples), }) for { eok, rok := expss.Next(), res.Next() require.Equal(t, eok, rok) if !eok { require.Equal(t, 0, len(res.Warnings())) continue Outer } sexp := expss.At() sres := res.At() require.Equal(t, sexp.Labels(), sres.Labels()) smplExp, errExp := storage.ExpandSamples(sexp.Iterator(), nil) smplRes, errRes := storage.ExpandSamples(sres.Iterator(), nil) require.Equal(t, errExp, errRes) require.Equal(t, smplExp, smplRes) } } } func TestAmendDatapointCausesError(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, 0) require.NoError(t, err) require.NoError(t, app.Commit()) app = db.Appender(ctx) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, 1) require.Equal(t, storage.ErrDuplicateSampleForTimestamp, err) require.NoError(t, app.Rollback()) } func TestDuplicateNaNDatapointNoAmendError(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, math.NaN()) require.NoError(t, err) require.NoError(t, app.Commit()) app = db.Appender(ctx) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, math.NaN()) require.NoError(t, err) } func TestNonDuplicateNaNDatapointsCausesAmendError(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, math.Float64frombits(0x7ff0000000000001)) require.NoError(t, err) require.NoError(t, app.Commit()) app = db.Appender(ctx) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, math.Float64frombits(0x7ff0000000000002)) require.Equal(t, storage.ErrDuplicateSampleForTimestamp, err) } func TestEmptyLabelsetCausesError(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.Labels{}, 0, 0) require.Error(t, err) require.Equal(t, "empty labelset: invalid sample", err.Error()) } func TestSkippingInvalidValuesInSameTxn(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() // Append AmendedValue. ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, 1) require.NoError(t, err) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 0, 2) require.NoError(t, err) require.NoError(t, app.Commit()) // Make sure the right value is stored. q, err := db.Querier(context.TODO(), 0, 10) require.NoError(t, err) ssMap := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) require.Equal(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(ctx) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 10, 3) require.NoError(t, err) _, err = app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, 7, 5) require.NoError(t, err) require.NoError(t, app.Commit()) q, err = db.Querier(context.TODO(), 0, 10) require.NoError(t, err) ssMap = query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) require.Equal(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 := openTestDB(t, nil, nil) // append data ctx := context.Background() app := db.Appender(ctx) mint := int64(1414141414000) for i := 0; i < 1000; i++ { _, err := app.Append(0, labels.FromStrings("foo", "bar"), mint+int64(i), 1.0) require.NoError(t, err) } require.NoError(t, app.Commit()) // create snapshot snap, err := ioutil.TempDir("", "snap") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(snap)) }() require.NoError(t, db.Snapshot(snap, true)) require.NoError(t, db.Close()) // reopen DB from snapshot db, err = Open(snap, nil, nil, nil, nil) require.NoError(t, err) defer func() { require.NoError(t, db.Close()) }() querier, err := db.Querier(context.TODO(), mint, mint+1000) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() // sum values seriesSet := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) sum := 0.0 for seriesSet.Next() { series := seriesSet.At().Iterator() for series.Next() { _, v := series.At() sum += v } require.NoError(t, series.Err()) } require.NoError(t, seriesSet.Err()) require.Equal(t, 0, len(seriesSet.Warnings())) require.Equal(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 := openTestDB(t, nil, nil) ctx := context.Background() app := db.Appender(ctx) mint := int64(1414141414000) for i := 0; i < 1000; i++ { _, err := app.Append(0, labels.FromStrings("foo", "bar"), mint+int64(i), 1.0) require.NoError(t, err) } require.NoError(t, app.Commit()) snap, err := ioutil.TempDir("", "snap") require.NoError(t, err) // Hackingly introduce "race", by having lower max time then maxTime in last chunk. db.head.maxTime.Sub(10) defer func() { require.NoError(t, os.RemoveAll(snap)) }() require.NoError(t, db.Snapshot(snap, true)) require.NoError(t, db.Close()) // Reopen DB from snapshot. db, err = Open(snap, nil, nil, nil, nil) require.NoError(t, err) defer func() { require.NoError(t, db.Close()) }() querier, err := db.Querier(context.TODO(), mint, mint+1000) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() // Sum values. seriesSet := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) sum := 0.0 for seriesSet.Next() { series := seriesSet.At().Iterator() for series.Next() { _, v := series.At() sum += v } require.NoError(t, series.Err()) } require.NoError(t, seriesSet.Err()) require.Equal(t, 0, len(seriesSet.Warnings())) // Since we snapshotted with MaxTime - 10, so expect 10 less samples. require.Equal(t, 1000.0-10, sum) } func TestDB_SnapshotWithDelete(t *testing.T) { numSamples := int64(10) db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) smpls := make([]float64, numSamples) for i := int64(0); i < numSamples; i++ { smpls[i] = rand.Float64() app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i]) } require.NoError(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 { require.NoError(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))) } // create snapshot snap, err := ioutil.TempDir("", "snap") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(snap)) }() require.NoError(t, db.Snapshot(snap, true)) // reopen DB from snapshot newDB, err := Open(snap, nil, nil, nil, nil) require.NoError(t, err) defer func() { require.NoError(t, newDB.Close()) }() // Compare the result. q, err := newDB.Querier(context.TODO(), 0, numSamples) require.NoError(t, err) defer func() { require.NoError(t, q.Close()) }() res := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) expSamples := make([]tsdbutil.Sample, 0, len(c.remaint)) for _, ts := range c.remaint { expSamples = append(expSamples, sample{ts, smpls[ts]}) } expss := newMockSeriesSet([]storage.Series{ storage.NewListSeries(labels.FromStrings("a", "b"), expSamples), }) if len(expSamples) == 0 { require.False(t, res.Next()) continue } for { eok, rok := expss.Next(), res.Next() require.Equal(t, eok, rok) if !eok { require.Equal(t, 0, len(res.Warnings())) continue Outer } sexp := expss.At() sres := res.At() require.Equal(t, sexp.Labels(), sres.Labels()) smplExp, errExp := storage.ExpandSamples(sexp.Iterator(), nil) smplRes, errRes := storage.ExpandSamples(sres.Iterator(), nil) require.Equal(t, errExp, errRes) require.Equal(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 := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) 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.Append(0, lset, ts, v) require.NoError(t, err) ts += rand.Int63n(timeInterval) + 1 } seriesMap[lset.String()] = series } require.NoError(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) require.NoError(t, err) ss := q.Select(false, nil, qry.ms...) result := map[string][]tsdbutil.Sample{} for ss.Next() { x := ss.At() smpls, err := storage.ExpandSamples(x.Iterator(), newSample) require.NoError(t, err) if len(smpls) > 0 { result[x.Labels().String()] = smpls } } require.NoError(t, ss.Err()) require.Equal(t, 0, len(ss.Warnings())) require.Equal(t, expected, result) q.Close() } } } func TestWALFlushedOnDBClose(t *testing.T) { db := openTestDB(t, nil, nil) dirDb := db.Dir() lbls := labels.Labels{labels.Label{Name: "labelname", Value: "labelvalue"}} ctx := context.Background() app := db.Appender(ctx) _, err := app.Append(0, lbls, 0, 1) require.NoError(t, err) require.NoError(t, app.Commit()) require.NoError(t, db.Close()) db, err = Open(dirDb, nil, nil, nil, nil) require.NoError(t, err) defer func() { require.NoError(t, db.Close()) }() q, err := db.Querier(context.TODO(), 0, 1) require.NoError(t, err) values, ws, err := q.LabelValues("labelname") require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(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) { filesAndDir, err := ioutil.ReadDir(filepath.Join(dbDir, "wal")) require.NoError(t, err) files := []os.FileInfo{} for _, f := range filesAndDir { if !f.IsDir() { files = append(files, f) } } // All the full segment files (all but the last) should match the segment size option. for _, f := range files[:len(files)-1] { require.Equal(t, int64(DefaultOptions().WALSegmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name()) } lastFile := files[len(files)-1] require.Greater(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) { filesAndDir, err := ioutil.ReadDir(filepath.Join(dbDir, "wal")) require.NoError(t, err) files := []os.FileInfo{} for _, f := range filesAndDir { if !f.IsDir() { files = append(files, f) } } require.Greater(t, len(files), 1, "current WALSegmentSize should result in more than a single WAL file.") // All the full segment files (all but the last) should match the segment size option. for _, f := range files[:len(files)-1] { require.Equal(t, int64(segmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name()) } lastFile := files[len(files)-1] require.Greater(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) { // Check that WAL dir is not there. _, err := os.Stat(filepath.Join(dbDir, "wal")) require.Error(t, err) // Check that there is chunks dir. _, err = os.Stat(mmappedChunksDir(dbDir)) require.NoError(t, err) }, } for segmentSize, testFunc := range tests { t.Run(fmt.Sprintf("WALSegmentSize %d test", segmentSize), func(t *testing.T) { opts := DefaultOptions() opts.WALSegmentSize = segmentSize db := openTestDB(t, opts, nil) for i := int64(0); i < 155; i++ { app := db.Appender(context.Background()) ref, err := app.Append(0, labels.Labels{labels.Label{Name: "wal" + fmt.Sprintf("%d", i), Value: "size"}}, i, rand.Float64()) require.NoError(t, err) for j := int64(1); j <= 78; j++ { _, err := app.Append(ref, nil, i+j, rand.Float64()) require.NoError(t, err) } require.NoError(t, app.Commit()) } dbDir := db.Dir() require.NoError(t, db.Close()) testFunc(dbDir, int(opts.WALSegmentSize)) }) } } func TestTombstoneClean(t *testing.T) { numSamples := int64(10) db := openTestDB(t, nil, nil) ctx := context.Background() app := db.Appender(ctx) smpls := make([]float64, numSamples) for i := int64(0); i < numSamples; i++ { smpls[i] = rand.Float64() app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i]) } require.NoError(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") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(snap)) }() require.NoError(t, db.Snapshot(snap, true)) require.NoError(t, db.Close()) // Reopen DB from snapshot. db, err = Open(snap, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() for _, r := range c.intervals { require.NoError(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))) } // All of the setup for THIS line. require.NoError(t, db.CleanTombstones()) // Compare the result. q, err := db.Querier(context.TODO(), 0, numSamples) require.NoError(t, err) defer q.Close() res := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b")) expSamples := make([]tsdbutil.Sample, 0, len(c.remaint)) for _, ts := range c.remaint { expSamples = append(expSamples, sample{ts, smpls[ts]}) } expss := newMockSeriesSet([]storage.Series{ storage.NewListSeries(labels.FromStrings("a", "b"), expSamples), }) if len(expSamples) == 0 { require.False(t, res.Next()) continue } for { eok, rok := expss.Next(), res.Next() require.Equal(t, eok, rok) if !eok { break } sexp := expss.At() sres := res.At() require.Equal(t, sexp.Labels(), sres.Labels()) smplExp, errExp := storage.ExpandSamples(sexp.Iterator(), nil) smplRes, errRes := storage.ExpandSamples(sres.Iterator(), nil) require.Equal(t, errExp, errRes) require.Equal(t, smplExp, smplRes) } require.Equal(t, 0, len(res.Warnings())) for _, b := range db.Blocks() { require.Equal(t, tombstones.NewMemTombstones(), b.tombstones) } } } // TestTombstoneCleanResultEmptyBlock tests that a TombstoneClean that results in empty blocks (no timeseries) // will also delete the resultant block. func TestTombstoneCleanResultEmptyBlock(t *testing.T) { numSamples := int64(10) db := openTestDB(t, nil, nil) ctx := context.Background() app := db.Appender(ctx) smpls := make([]float64, numSamples) for i := int64(0); i < numSamples; i++ { smpls[i] = rand.Float64() app.Append(0, labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i]) } require.NoError(t, app.Commit()) // Interval should cover the whole block. intervals := tombstones.Intervals{{Mint: 0, Maxt: numSamples}} // Create snapshot. snap, err := ioutil.TempDir("", "snap") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(snap)) }() require.NoError(t, db.Snapshot(snap, true)) require.NoError(t, db.Close()) // Reopen DB from snapshot. db, err = Open(snap, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() // Create tombstones by deleting all samples. for _, r := range intervals { require.NoError(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))) } require.NoError(t, db.CleanTombstones()) // After cleaning tombstones that covers the entire block, no blocks should be left behind. actualBlockDirs, err := blockDirs(db.dir) require.NoError(t, err) require.Equal(t, 0, len(actualBlockDirs)) } // 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 := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() var oldBlockDirs []string // Create some 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, int64(i), int64(i)+1)) block, err := OpenBlock(nil, blockDir, nil) require.NoError(t, err) // Add some fake tombstones to trigger the compaction. tomb := tombstones.NewMemTombstones() tomb.AddInterval(0, tombstones.Interval{Mint: int64(i), Maxt: int64(i) + 1}) block.tombstones = tomb db.blocks = append(db.blocks, block) oldBlockDirs = append(oldBlockDirs, 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. require.Error(t, db.CleanTombstones()) // Now check that the CleanTombstones replaced the old block even after a failure. actualBlockDirs, err := blockDirs(db.dir) require.NoError(t, err) // Only one block should have been replaced by a new block. require.Equal(t, len(oldBlockDirs), len(actualBlockDirs)) require.Equal(t, len(intersection(oldBlockDirs, actualBlockDirs)), len(actualBlockDirs)-1) } // TestTombstoneCleanRetentionLimitsRace tests that a CleanTombstones operation // and retention limit policies, when triggered at the same time, // won't race against each other. func TestTombstoneCleanRetentionLimitsRace(t *testing.T) { opts := DefaultOptions() var wg sync.WaitGroup // We want to make sure that a race doesn't happen when a normal reload and a CleanTombstones() // reload try to delete the same block. Without the correct lock placement, it can happen if a // block is marked for deletion due to retention limits and also has tombstones to be cleaned at // the same time. // // That is something tricky to trigger, so let's try several times just to make sure. for i := 0; i < 20; i++ { db := openTestDB(t, opts, nil) totalBlocks := 20 dbDir := db.Dir() // Generate some blocks with old mint (near epoch). for j := 0; j < totalBlocks; j++ { blockDir := createBlock(t, dbDir, genSeries(10, 1, int64(j), int64(j)+1)) block, err := OpenBlock(nil, blockDir, nil) require.NoError(t, err) // Cover block with tombstones so it can be deleted with CleanTombstones() as well. tomb := tombstones.NewMemTombstones() tomb.AddInterval(0, tombstones.Interval{Mint: int64(j), Maxt: int64(j) + 1}) block.tombstones = tomb db.blocks = append(db.blocks, block) } wg.Add(2) // Run reload and CleanTombstones together, with a small time window randomization go func() { defer wg.Done() time.Sleep(time.Duration(rand.Float64() * 100 * float64(time.Millisecond))) require.NoError(t, db.reloadBlocks()) }() go func() { defer wg.Done() time.Sleep(time.Duration(rand.Float64() * 100 * float64(time.Millisecond))) require.NoError(t, db.CleanTombstones()) }() wg.Wait() require.NoError(t, db.Close()) } } func intersection(oldBlocks, actualBlocks []string) (intersection []string) { hash := make(map[string]bool) for _, e := range oldBlocks { hash[e] = true } for _, e := range actualBlocks { // If block present in the hashmap then append intersection list. if hash[e] { intersection = append(intersection, e) } } return } // 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) require.NoError(c.t, err) require.NoError(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) require.NoError(c.t, err) require.Equal(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 := openTestDB(t, nil, []int64{1000}) defer func() { require.NoError(t, db.Close()) }() 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)) } require.NoError(t, db.reloadBlocks()) // Reload the db to register the new blocks. require.Equal(t, len(blocks), len(db.Blocks())) // Ensure all blocks are registered. db.opts.RetentionDuration = blocks[2].MaxTime - blocks[1].MinTime require.NoError(t, db.reloadBlocks()) expBlocks := blocks[1:] actBlocks := db.Blocks() require.Equal(t, 1, int(prom_testutil.ToFloat64(db.metrics.timeRetentionCount)), "metric retention count mismatch") require.Equal(t, len(expBlocks), len(actBlocks)) require.Equal(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime) require.Equal(t, expBlocks[len(expBlocks)-1].MaxTime, actBlocks[len(actBlocks)-1].meta.MaxTime) } func TestSizeRetention(t *testing.T) { db := openTestDB(t, nil, []int64{100}) defer func() { require.NoError(t, db.Close()) }() 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(context.Background()) for _, m := range headBlocks { series := genSeries(100, 10, m.MinTime, m.MaxTime+1) for _, s := range series { it := s.Iterator() for it.Next() { tim, v := it.At() _, err := headApp.Append(0, s.Labels(), tim, v) require.NoError(t, err) } require.NoError(t, it.Err()) } } require.NoError(t, headApp.Commit()) // Test that registered size matches the actual disk size. require.NoError(t, db.reloadBlocks()) // Reload the db to register the new db size. require.Equal(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() require.NoError(t, err) cdmSize, err := db.Head().chunkDiskMapper.Size() require.NoError(t, err) require.NotZero(t, cdmSize) // Expected size should take into account block size + WAL size + Head // chunks size expSize := blockSize + walSize + cdmSize actSize, err := fileutil.DirSize(db.Dir()) require.NoError(t, err) require.Equal(t, expSize, actSize, "registered size doesn't match actual disk size") // Create a WAL checkpoint, and compare sizes. first, last, err := wal.Segments(db.Head().wal.Dir()) require.NoError(t, err) _, err = wal.Checkpoint(log.NewNopLogger(), db.Head().wal, first, last-1, func(x uint64) bool { return false }, 0) require.NoError(t, err) blockSize = int64(prom_testutil.ToFloat64(db.metrics.blocksBytes)) // Use the actual internal metrics. walSize, err = db.Head().wal.Size() require.NoError(t, err) cdmSize, err = db.Head().chunkDiskMapper.Size() require.NoError(t, err) require.NotZero(t, cdmSize) expSize = blockSize + walSize + cdmSize actSize, err = fileutil.DirSize(db.Dir()) require.NoError(t, err) require.Equal(t, expSize, actSize, "registered size doesn't match actual disk size") // Truncate Chunk Disk Mapper and compare sizes. require.NoError(t, db.Head().chunkDiskMapper.Truncate(900)) cdmSize, err = db.Head().chunkDiskMapper.Size() require.NoError(t, err) require.NotZero(t, cdmSize) expSize = blockSize + walSize + cdmSize actSize, err = fileutil.DirSize(db.Dir()) require.NoError(t, err) require.Equal(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. require.NoError(t, db.reloadBlocks()) // 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() require.NoError(t, err) cdmSize, err = db.Head().chunkDiskMapper.Size() require.NoError(t, err) require.NotZero(t, cdmSize) // Expected size should take into account block size + WAL size expSize = blockSize + walSize + cdmSize actRetentionCount := int(prom_testutil.ToFloat64(db.metrics.sizeRetentionCount)) actSize, err = fileutil.DirSize(db.Dir()) require.NoError(t, err) require.Equal(t, 1, actRetentionCount, "metric retention count mismatch") require.Equal(t, actSize, expSize, "metric db size doesn't match actual disk size") require.LessOrEqual(t, expSize, sizeLimit, "actual size (%v) is expected to be less than or equal to limit (%v)", expSize, sizeLimit) require.Equal(t, len(blocks)-1, len(actBlocks), "new block count should be decreased from:%v to:%v", len(blocks), len(blocks)-1) require.Equal(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime, "maxT mismatch of the first block") require.Equal(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 := openTestDB(t, &Options{ MaxBytes: c.maxBytes, }, []int64{100}) defer func() { require.NoError(t, db.Close()) }() actMaxBytes := int64(prom_testutil.ToFloat64(db.metrics.maxBytes)) require.Equal(t, actMaxBytes, c.expMaxBytes, "metric retention limit bytes mismatch") } } func TestNotMatcherSelectsLabelsUnsetSeries(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() labelpairs := []labels.Labels{ labels.FromStrings("a", "abcd", "b", "abcde"), labels.FromStrings("labelname", "labelvalue"), } ctx := context.Background() app := db.Appender(ctx) for _, lbls := range labelpairs { _, err := app.Append(0, lbls, 0, 1) require.NoError(t, err) } require.NoError(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) require.NoError(t, err) defer func() { require.NoError(t, q.Close()) }() for _, c := range cases { ss := q.Select(false, nil, c.selector...) lres, _, ws, err := expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, c.series, lres) } } // expandSeriesSet returns the raw labels in the order they are retrieved from // the series set and the samples keyed by Labels().String(). func expandSeriesSet(ss storage.SeriesSet) ([]labels.Labels, map[string][]sample, storage.Warnings, error) { resultLabels := []labels.Labels{} resultSamples := map[string][]sample{} for ss.Next() { series := ss.At() samples := []sample{} it := series.Iterator() for it.Next() { t, v := it.At() samples = append(samples, sample{t: t, v: v}) } resultLabels = append(resultLabels, series.Labels()) resultSamples[series.Labels().String()] = samples } return resultLabels, resultSamples, ss.Warnings(), 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)} } require.Equal(t, 0, len(OverlappingBlocks(metas)), "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} require.Equal(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} require.Equal(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} require.Equal(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} require.Equal(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} require.Equal(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} require.Equal(t, Overlaps{ {Min: 94, Max: 99}: {metas[9], o6a, o6b}, {Min: 100, Max: 105}: {o6a, metas[10]}, }, OverlappingBlocks(add(o6a, o6b))) // All together. require.Equal(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}) require.Equal(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/tsdb/issues/347 func TestChunkAtBlockBoundary(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) blockRange := db.compactor.(*LeveledCompactor).ranges[0] label := labels.FromStrings("foo", "bar") for i := int64(0); i < 3; i++ { _, err := app.Append(0, label, i*blockRange, 0) require.NoError(t, err) _, err = app.Append(0, label, i*blockRange+1000, 0) require.NoError(t, err) } err := app.Commit() require.NoError(t, err) err = db.Compact() require.NoError(t, err) for _, block := range db.Blocks() { r, err := block.Index() require.NoError(t, err) defer r.Close() meta := block.Meta() k, v := index.AllPostingsKey() p, err := r.Postings(k, v) require.NoError(t, err) var ( lset labels.Labels chks []chunks.Meta ) chunkCount := 0 for p.Next() { err = r.Series(p.At(), &lset, &chks) require.NoError(t, err) for _, c := range chks { require.True(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++ } } require.Equal(t, 1, chunkCount, "expected 1 chunk in block %s, got %d", meta.ULID, chunkCount) } } func TestQuerierWithBoundaryChunks(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() ctx := context.Background() app := db.Appender(ctx) blockRange := db.compactor.(*LeveledCompactor).ranges[0] label := labels.FromStrings("foo", "bar") for i := int64(0); i < 5; i++ { _, err := app.Append(0, label, i*blockRange, 0) require.NoError(t, err) _, err = app.Append(0, labels.FromStrings("blockID", strconv.FormatInt(i, 10)), i*blockRange, 0) require.NoError(t, err) } err := app.Commit() require.NoError(t, err) err = db.Compact() require.NoError(t, err) require.GreaterOrEqual(t, len(db.blocks), 3, "invalid test, less than three blocks in DB") q, err := db.Querier(context.TODO(), blockRange, 2*blockRange) require.NoError(t, err) defer q.Close() // The requested interval covers 2 blocks, so the querier's label values for blockID should give us 2 values, one from each block. b, ws, err := q.LabelValues("blockID") require.NoError(t, err) require.Equal(t, storage.Warnings(nil), ws) require.Equal(t, []string{"1", "2"}, b) } // 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") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dir)) }() db, err := Open(dir, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() // Should be set to init values if no WAL or blocks exist so far. require.Equal(t, int64(math.MaxInt64), db.head.MinTime()) require.Equal(t, int64(math.MinInt64), db.head.MaxTime()) // First added sample initializes the writable range. ctx := context.Background() app := db.Appender(ctx) _, err = app.Append(0, labels.FromStrings("a", "b"), 1000, 1) require.NoError(t, err) require.Equal(t, int64(1000), db.head.MinTime()) require.Equal(t, int64(1000), db.head.MaxTime()) }) t.Run("wal-only", func(t *testing.T) { dir, err := ioutil.TempDir("", "test_head_init") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dir)) }() require.NoError(t, os.MkdirAll(path.Join(dir, "wal"), 0777)) w, err := wal.New(nil, nil, path.Join(dir, "wal"), false) require.NoError(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), ) require.NoError(t, err) require.NoError(t, w.Close()) db, err := Open(dir, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() require.Equal(t, int64(5000), db.head.MinTime()) require.Equal(t, int64(15000), db.head.MaxTime()) }) t.Run("existing-block", func(t *testing.T) { dir, err := ioutil.TempDir("", "test_head_init") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dir)) }() createBlock(t, dir, genSeries(1, 1, 1000, 2000)) db, err := Open(dir, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() require.Equal(t, int64(2000), db.head.MinTime()) require.Equal(t, int64(2000), db.head.MaxTime()) }) t.Run("existing-block-and-wal", func(t *testing.T) { dir, err := ioutil.TempDir("", "test_head_init") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dir)) }() createBlock(t, dir, genSeries(1, 1, 1000, 6000)) require.NoError(t, os.MkdirAll(path.Join(dir, "wal"), 0777)) w, err := wal.New(nil, nil, path.Join(dir, "wal"), false) require.NoError(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), ) require.NoError(t, err) require.NoError(t, w.Close()) r := prometheus.NewRegistry() db, err := Open(dir, nil, r, nil, nil) require.NoError(t, err) defer db.Close() require.Equal(t, int64(6000), db.head.MinTime()) require.Equal(t, int64(15000), db.head.MaxTime()) // Check that old series has been GCed. require.Equal(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.series)) }) } func TestNoEmptyBlocks(t *testing.T) { db := openTestDB(t, nil, []int64{100}) ctx := context.Background() defer func() { require.NoError(t, db.Close()) }() 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) { require.NoError(t, db.Compact()) actBlocks, err := blockDirs(db.Dir()) require.NoError(t, err) require.Equal(t, len(db.Blocks()), len(actBlocks)) require.Equal(t, 0, len(actBlocks)) require.Equal(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(ctx) _, err := app.Append(0, defaultLabel, 1, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, 2, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, 3+rangeToTriggerCompaction, 0) require.NoError(t, err) require.NoError(t, app.Commit()) require.NoError(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher)) require.NoError(t, db.Compact()) require.Equal(t, 1, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here") actBlocks, err := blockDirs(db.Dir()) require.NoError(t, err) require.Equal(t, len(db.Blocks()), len(actBlocks)) require.Equal(t, 0, len(actBlocks)) app = db.Appender(ctx) _, err = app.Append(0, defaultLabel, 1, 0) require.Equal(t, storage.ErrOutOfBounds, err, "the head should be truncated so no samples in the past should be allowed") // Adding new blocks. currentTime := db.Head().MaxTime() _, err = app.Append(0, defaultLabel, currentTime, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, currentTime+1, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, currentTime+rangeToTriggerCompaction, 0) require.NoError(t, err) require.NoError(t, app.Commit()) require.NoError(t, db.Compact()) require.Equal(t, 2, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here") actBlocks, err = blockDirs(db.Dir()) require.NoError(t, err) require.Equal(t, len(db.Blocks()), len(actBlocks)) require.Equal(t, 1, len(actBlocks), "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(ctx) currentTime := db.Head().MaxTime() _, err := app.Append(0, defaultLabel, currentTime, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, currentTime+1, 0) require.NoError(t, err) _, err = app.Append(0, defaultLabel, currentTime+rangeToTriggerCompaction, 0) require.NoError(t, err) require.NoError(t, app.Commit()) require.NoError(t, db.head.Delete(math.MinInt64, math.MaxInt64, defaultMatcher)) require.NoError(t, db.Compact()) require.Equal(t, 3, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here") require.Equal(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() require.NoError(t, db.reloadBlocks()) // Reload the db to register the new blocks. require.Equal(t, len(blocks)+len(oldBlocks), len(db.Blocks())) // Ensure all blocks are registered. require.NoError(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher)) require.NoError(t, db.Compact()) require.Equal(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()) require.NoError(t, err) require.Equal(t, len(db.Blocks()), len(actBlocks)) require.Equal(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() ctx := context.Background() app := db.Appender(ctx) for i := mint; i <= maxt; i++ { for _, tuple := range sampleLabels { label := labels.FromStrings(tuple[0], tuple[1]) _, err := app.Append(0, label, i*blockRange, 0) require.NoError(t, err) } } err := app.Commit() require.NoError(t, err) } for _, tst := range tests { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() appendSamples(db, 0, 4, tst.sampleLabels1) // Testing head. headIndexr, err := db.head.Index() require.NoError(t, err) labelNames, err := headIndexr.LabelNames() require.NoError(t, err) require.Equal(t, tst.exp1, labelNames) require.NoError(t, headIndexr.Close()) // Testing disk. err = db.Compact() require.NoError(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() require.NoError(t, err) labelNames, err = blockIndexr.LabelNames() require.NoError(t, err) require.Equal(t, tst.exp1, labelNames) require.NoError(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) require.NoError(t, err) var ws storage.Warnings labelNames, ws, err = q.LabelNames() require.NoError(t, err) require.Equal(t, 0, len(ws)) require.NoError(t, q.Close()) require.Equal(t, tst.exp2, labelNames) } } func TestCorrectNumTombstones(t *testing.T) { db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() blockRange := db.compactor.(*LeveledCompactor).ranges[0] defaultLabel := labels.FromStrings("foo", "bar") defaultMatcher := labels.MustNewMatcher(labels.MatchEqual, defaultLabel[0].Name, defaultLabel[0].Value) ctx := context.Background() app := db.Appender(ctx) for i := int64(0); i < 3; i++ { for j := int64(0); j < 15; j++ { _, err := app.Append(0, defaultLabel, i*blockRange+j, 0) require.NoError(t, err) } } require.NoError(t, app.Commit()) err := db.Compact() require.NoError(t, err) require.Equal(t, 1, len(db.blocks)) require.NoError(t, db.Delete(0, 1, defaultMatcher)) require.Equal(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones) // {0, 1} and {2, 3} are merged to form 1 tombstone. require.NoError(t, db.Delete(2, 3, defaultMatcher)) require.Equal(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones) require.NoError(t, db.Delete(5, 6, defaultMatcher)) require.Equal(t, uint64(2), db.blocks[0].meta.Stats.NumTombstones) require.NoError(t, db.Delete(9, 11, defaultMatcher)) require.Equal(t, uint64(3), db.blocks[0].meta.Stats.NumTombstones) } // 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)) ctx := context.Background() dir, err := ioutil.TempDir("", "test_storage") require.NoError(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}, nil) require.NoError(t, err) rangeToTriggerCompaction := db.compactor.(*LeveledCompactor).ranges[0]/2*3 + 1 defer func() { os.RemoveAll(dir) }() app := db.Appender(ctx) lbl := labels.Labels{{Name: "a", Value: "b"}} _, err = app.Append(0, 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.Append(0, lbl, firstBlockMaxT+1, rand.Float64()) require.NoError(t, err) _, err = app.Append(0, lbl, firstBlockMaxT+2, rand.Float64()) require.NoError(t, err) secondBlockMaxt := firstBlockMaxT + rangeToTriggerCompaction _, err = app.Append(0, lbl, secondBlockMaxt, rand.Float64()) // Add samples to trigger a new compaction require.NoError(t, err) require.NoError(t, app.Commit()) for x := 0; x < 100; x++ { if len(db.Blocks()) == 2 { break } time.Sleep(100 * time.Millisecond) } require.Equal(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. app = db.Appender(ctx) db.DisableCompactions() _, err = app.Append(0, lbl, secondBlockMaxt+1, rand.Float64()) require.NoError(t, err) _, err = app.Append(0, lbl, secondBlockMaxt+2, rand.Float64()) require.NoError(t, err) _, err = app.Append(0, lbl, secondBlockMaxt+3, rand.Float64()) require.NoError(t, err) _, err = app.Append(0, lbl, secondBlockMaxt+4, rand.Float64()) require.NoError(t, err) require.NoError(t, app.Commit()) require.NoError(t, db.Close()) thirdBlockMaxt := secondBlockMaxt + 2 createBlock(t, dir, genSeries(1, 1, secondBlockMaxt+1, thirdBlockMaxt)) db, err = open(dir, logger, nil, DefaultOptions(), []int64{10000}, nil) require.NoError(t, err) defer db.Close() require.Equal(t, 3, len(db.Blocks()), "db doesn't include expected number of blocks") require.Equal(t, db.Blocks()[2].Meta().MaxTime, thirdBlockMaxt, "unexpected maxt of the last block") app = db.Appender(ctx) _, err = app.Append(0, lbl, thirdBlockMaxt+rangeToTriggerCompaction, rand.Float64()) // Trigger a compaction require.NoError(t, err) require.NoError(t, app.Commit()) for x := 0; x < 100; x++ { if len(db.Blocks()) == 4 { break } time.Sleep(100 * time.Millisecond) } require.Equal(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 expChunks map[string][]chunks.Meta expDBHash []byte matchAll = labels.MustNewMatcher(labels.MatchEqual, "", "") err error ) // Bootstrap the db. { dbDir, err = ioutil.TempDir("", "test") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() dbBlocks := []*BlockMeta{ // Create three 2-sample blocks. {MinTime: 10, MaxTime: 12}, {MinTime: 12, MaxTime: 14}, {MinTime: 14, MaxTime: 16}, } for _, m := range dbBlocks { _ = createBlock(t, dbDir, genSeries(1, 1, m.MinTime, m.MaxTime)) } // Add head to test DBReadOnly WAL reading capabilities. w, err := wal.New(logger, nil, filepath.Join(dbDir, "wal"), true) require.NoError(t, err) h := createHead(t, w, genSeries(1, 1, 16, 18), dbDir) require.NoError(t, h.Close()) } // Open a normal db to use for a comparison. { dbWritable, err := Open(dbDir, logger, nil, nil, nil) require.NoError(t, err) dbWritable.DisableCompactions() dbSizeBeforeAppend, err := fileutil.DirSize(dbWritable.Dir()) require.NoError(t, err) app := dbWritable.Appender(context.Background()) _, err = app.Append(0, labels.FromStrings("foo", "bar"), dbWritable.Head().MaxTime()+1, 0) require.NoError(t, err) require.NoError(t, app.Commit()) expBlocks = dbWritable.Blocks() expDbSize, err := fileutil.DirSize(dbWritable.Dir()) require.NoError(t, err) require.Greater(t, expDbSize, dbSizeBeforeAppend, "db size didn't increase after an append") q, err := dbWritable.Querier(context.TODO(), math.MinInt64, math.MaxInt64) require.NoError(t, err) expSeries = query(t, q, matchAll) cq, err := dbWritable.ChunkQuerier(context.TODO(), math.MinInt64, math.MaxInt64) require.NoError(t, err) expChunks = queryChunks(t, cq, matchAll) require.NoError(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) require.NoError(t, err) defer func() { require.NoError(t, dbReadOnly.Close()) }() t.Run("blocks", func(t *testing.T) { blocks, err := dbReadOnly.Blocks() require.NoError(t, err) require.Equal(t, len(expBlocks), len(blocks)) for i, expBlock := range expBlocks { require.Equal(t, expBlock.Meta(), blocks[i].Meta(), "block meta mismatch") } }) t.Run("querier", func(t *testing.T) { // Open a read only db and ensure that the API returns the same result as the normal DB. q, err := dbReadOnly.Querier(context.TODO(), math.MinInt64, math.MaxInt64) require.NoError(t, err) readOnlySeries := query(t, q, matchAll) readOnlyDBHash := testutil.DirHash(t, dbDir) require.Equal(t, len(expSeries), len(readOnlySeries), "total series mismatch") require.Equal(t, expSeries, readOnlySeries, "series mismatch") require.Equal(t, expDBHash, readOnlyDBHash, "after all read operations the db hash should remain the same") }) t.Run("chunk querier", func(t *testing.T) { cq, err := dbReadOnly.ChunkQuerier(context.TODO(), math.MinInt64, math.MaxInt64) require.NoError(t, err) readOnlySeries := queryChunks(t, cq, matchAll) readOnlyDBHash := testutil.DirHash(t, dbDir) require.Equal(t, len(expChunks), len(readOnlySeries), "total series mismatch") require.Equal(t, expChunks, readOnlySeries, "series chunks mismatch") require.Equal(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") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() db, err := OpenDBReadOnly(dbDir, log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))) require.NoError(t, err) require.NoError(t, db.Close()) require.Equal(t, db.Close(), ErrClosed) _, err = db.Blocks() require.Equal(t, err, ErrClosed) _, err = db.Querier(context.TODO(), 0, 1) require.Equal(t, err, ErrClosed) } func TestDBReadOnly_FlushWAL(t *testing.T) { var ( dbDir string logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr)) err error maxt int ctx = context.Background() ) // Bootstrap the db. { dbDir, err = ioutil.TempDir("", "test") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() // Append data to the WAL. db, err := Open(dbDir, logger, nil, nil, nil) require.NoError(t, err) db.DisableCompactions() app := db.Appender(ctx) maxt = 1000 for i := 0; i < maxt; i++ { _, err := app.Append(0, labels.FromStrings(defaultLabelName, "flush"), int64(i), 1.0) require.NoError(t, err) } require.NoError(t, app.Commit()) defer func() { require.NoError(t, db.Close()) }() } // Flush WAL. db, err := OpenDBReadOnly(dbDir, logger) require.NoError(t, err) flush, err := ioutil.TempDir("", "flush") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(flush)) }() require.NoError(t, db.FlushWAL(flush)) require.NoError(t, db.Close()) // Reopen the DB from the flushed WAL block. db, err = OpenDBReadOnly(flush, logger) require.NoError(t, err) defer func() { require.NoError(t, db.Close()) }() blocks, err := db.Blocks() require.NoError(t, err) require.Equal(t, len(blocks), 1) querier, err := db.Querier(context.TODO(), 0, int64(maxt)-1) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() // Sum the values. seriesSet := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, defaultLabelName, "flush")) sum := 0.0 for seriesSet.Next() { series := seriesSet.At().Iterator() for series.Next() { _, v := series.At() sum += v } require.NoError(t, series.Err()) } require.NoError(t, seriesSet.Err()) require.Equal(t, 0, len(seriesSet.Warnings())) require.Equal(t, 1000.0, sum) } func TestDBCannotSeePartialCommits(t *testing.T) { tmpdir, _ := ioutil.TempDir("", "test") defer func() { require.NoError(t, os.RemoveAll(tmpdir)) }() db, err := Open(tmpdir, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() stop := make(chan struct{}) firstInsert := make(chan struct{}) ctx := context.Background() // Insert data in batches. go func() { iter := 0 for { app := db.Appender(ctx) for j := 0; j < 100; j++ { _, err := app.Append(0, labels.FromStrings("foo", "bar", "a", strconv.Itoa(j)), int64(iter), float64(iter)) require.NoError(t, err) } err = app.Commit() require.NoError(t, err) if iter == 0 { close(firstInsert) } iter++ select { case <-stop: return default: } } }() <-firstInsert // This is a race condition, so do a few tests to tickle it. // Usually most will fail. inconsistencies := 0 for i := 0; i < 10; i++ { func() { querier, err := db.Querier(context.Background(), 0, 1000000) require.NoError(t, err) defer querier.Close() ss := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err := expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) values := map[float64]struct{}{} for _, series := range seriesSet { values[series[len(series)-1].v] = struct{}{} } if len(values) != 1 { inconsistencies++ } }() } stop <- struct{}{} require.Equal(t, 0, inconsistencies, "Some queries saw inconsistent results.") } func TestDBQueryDoesntSeeAppendsAfterCreation(t *testing.T) { tmpdir, _ := ioutil.TempDir("", "test") defer func() { require.NoError(t, os.RemoveAll(tmpdir)) }() db, err := Open(tmpdir, nil, nil, nil, nil) require.NoError(t, err) defer db.Close() querierBeforeAdd, err := db.Querier(context.Background(), 0, 1000000) require.NoError(t, err) defer querierBeforeAdd.Close() ctx := context.Background() app := db.Appender(ctx) _, err = app.Append(0, labels.FromStrings("foo", "bar"), 0, 0) require.NoError(t, err) querierAfterAddButBeforeCommit, err := db.Querier(context.Background(), 0, 1000000) require.NoError(t, err) defer querierAfterAddButBeforeCommit.Close() // None of the queriers should return anything after the Add but before the commit. ss := querierBeforeAdd.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err := expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, map[string][]sample{}, seriesSet) ss = querierAfterAddButBeforeCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err = expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, map[string][]sample{}, seriesSet) // This commit is after the queriers are created, so should not be returned. err = app.Commit() require.NoError(t, err) // Nothing returned for querier created before the Add. ss = querierBeforeAdd.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err = expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, map[string][]sample{}, seriesSet) // Series exists but has no samples for querier created after Add. ss = querierAfterAddButBeforeCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err = expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, map[string][]sample{`{foo="bar"}`: {}}, seriesSet) querierAfterCommit, err := db.Querier(context.Background(), 0, 1000000) require.NoError(t, err) defer querierAfterCommit.Close() // Samples are returned for querier created after Commit. ss = querierAfterCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")) _, seriesSet, ws, err = expandSeriesSet(ss) require.NoError(t, err) require.Equal(t, 0, len(ws)) require.Equal(t, map[string][]sample{`{foo="bar"}`: {{t: 0, v: 0}}}, seriesSet) } // 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{ { 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{ { 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{ { 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{ { 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{ { chk1, chk2, chk3, }, }, segmentSize: 1, expSegmentSizes: []int{chunkSize, chunkSize, chunkSize}, expSegmentsCount: 3, }, // 5:Adding multiple batches of chunks. { chks: [][]chunks.Meta{ { chk1, chk2, chk3, }, { chk4, chk5, }, }, segmentSize: 3 * chunkSize, expSegmentSizes: []int{3 * chunkSize, 2 * chunkSize}, expSegmentsCount: 2, }, // 6:Adding multiple batches of chunks. { chks: [][]chunks.Meta{ { chk1, }, { chk2, chk3, }, { 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") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(tempDir)) }() chunkw, err := chunks.NewWriterWithSegSize(tempDir, chunks.SegmentHeaderSize+int64(test.segmentSize)) require.NoError(t, err) for _, chks := range test.chks { require.NoError(t, chunkw.WriteChunks(chks...)) } require.NoError(t, chunkw.Close()) files, err := ioutil.ReadDir(tempDir) require.NoError(t, err) require.Equal(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. require.GreaterOrEqual(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 } require.Equal(t, sizeExp, sizeAct) // Check the content of the chunks. r, err := chunks.NewDirReader(tempDir, nil) require.NoError(t, err) defer func() { require.NoError(t, r.Close()) }() for _, chks := range test.chks { for _, chkExp := range chks { chkAct, err := r.Chunk(chkExp.Ref) require.NoError(t, err) require.Equal(t, chkExp.Chunk.Bytes(), chkAct.Bytes()) } } }) } } func TestRangeForTimestamp(t *testing.T) { type args struct { t int64 width int64 } tests := []struct { args args expected int64 }{ {args{0, 5}, 5}, {args{1, 5}, 5}, {args{5, 5}, 10}, {args{6, 5}, 10}, {args{13, 5}, 15}, {args{95, 5}, 100}, } for _, tt := range tests { got := rangeForTimestamp(tt.args.t, tt.args.width) require.Equal(t, tt.expected, got) } } // 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") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(tempDir)) }() chunkw, err := chunks.NewWriter(tempDir) require.NoError(t, err) require.NoError(t, chunkw.WriteChunks(chks...)) require.NoError(t, chunkw.Close()) r, err := chunks.NewDirReader(tempDir, nil) require.NoError(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) require.NoError(t, err) require.Equal(t, chunk.Chunk.Bytes(), chkAct.Bytes()) }(chk) } wg.Wait() } require.NoError(t, r.Close()) } // TestCompactHead ensures that the head compaction // creates a block that is ready for loading and // does not cause data loss. // This test: // * opens a storage; // * appends values; // * compacts the head; and // * queries the db to ensure the samples are present from the compacted head. func TestCompactHead(t *testing.T) { dbDir, err := ioutil.TempDir("", "testFlush") require.NoError(t, err) defer func() { require.NoError(t, os.RemoveAll(dbDir)) }() // Open a DB and append data to the WAL. tsdbCfg := &Options{ RetentionDuration: int64(time.Hour * 24 * 15 / time.Millisecond), NoLockfile: true, MinBlockDuration: int64(time.Hour * 2 / time.Millisecond), MaxBlockDuration: int64(time.Hour * 2 / time.Millisecond), WALCompression: true, } db, err := Open(dbDir, log.NewNopLogger(), prometheus.NewRegistry(), tsdbCfg, nil) require.NoError(t, err) ctx := context.Background() app := db.Appender(ctx) var expSamples []sample maxt := 100 for i := 0; i < maxt; i++ { val := rand.Float64() _, err := app.Append(0, labels.FromStrings("a", "b"), int64(i), val) require.NoError(t, err) expSamples = append(expSamples, sample{int64(i), val}) } require.NoError(t, app.Commit()) // Compact the Head to create a new block. require.NoError(t, db.CompactHead(NewRangeHead(db.Head(), 0, int64(maxt)-1))) require.NoError(t, db.Close()) // Delete everything but the new block and // reopen the db to query it to ensure it includes the head data. require.NoError(t, deleteNonBlocks(db.Dir())) db, err = Open(dbDir, log.NewNopLogger(), prometheus.NewRegistry(), tsdbCfg, nil) require.NoError(t, err) require.Equal(t, 1, len(db.Blocks())) require.Equal(t, int64(maxt), db.Head().MinTime()) defer func() { require.NoError(t, db.Close()) }() querier, err := db.Querier(context.Background(), 0, int64(maxt)-1) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() seriesSet := querier.Select(false, nil, &labels.Matcher{Type: labels.MatchEqual, Name: "a", Value: "b"}) var actSamples []sample for seriesSet.Next() { series := seriesSet.At().Iterator() for series.Next() { time, val := series.At() actSamples = append(actSamples, sample{int64(time), val}) } require.NoError(t, series.Err()) } require.Equal(t, expSamples, actSamples) require.NoError(t, seriesSet.Err()) } func deleteNonBlocks(dbDir string) error { dirs, err := ioutil.ReadDir(dbDir) if err != nil { return err } for _, dir := range dirs { if ok := isBlockDir(dir); !ok { if err := os.RemoveAll(filepath.Join(dbDir, dir.Name())); err != nil { return err } } } dirs, err = ioutil.ReadDir(dbDir) if err != nil { return err } for _, dir := range dirs { if ok := isBlockDir(dir); !ok { return errors.Errorf("root folder:%v still hase non block directory:%v", dbDir, dir.Name()) } } return nil } func TestOpen_VariousBlockStates(t *testing.T) { tmpDir, err := ioutil.TempDir("", "test") require.NoError(t, err) t.Cleanup(func() { require.NoError(t, os.RemoveAll(tmpDir)) }) var ( expectedLoadedDirs = map[string]struct{}{} expectedRemovedDirs = map[string]struct{}{} expectedIgnoredDirs = map[string]struct{}{} ) { // Ok blocks; should be loaded. expectedLoadedDirs[createBlock(t, tmpDir, genSeries(10, 2, 0, 10))] = struct{}{} expectedLoadedDirs[createBlock(t, tmpDir, genSeries(10, 2, 10, 20))] = struct{}{} } { // Block to repair; should be repaired & loaded. dbDir := filepath.Join("testdata", "repair_index_version", "01BZJ9WJQPWHGNC2W4J9TA62KC") outDir := filepath.Join(tmpDir, "01BZJ9WJQPWHGNC2W4J9TA62KC") expectedLoadedDirs[outDir] = struct{}{} // Touch chunks dir in block. require.NoError(t, os.MkdirAll(filepath.Join(dbDir, "chunks"), 0777)) defer func() { require.NoError(t, os.RemoveAll(filepath.Join(dbDir, "chunks"))) }() require.NoError(t, os.Mkdir(outDir, os.ModePerm)) require.NoError(t, fileutil.CopyDirs(dbDir, outDir)) } { // Missing meta.json; should be ignored and only logged. // TODO(bwplotka): Probably add metric. dir := createBlock(t, tmpDir, genSeries(10, 2, 20, 30)) expectedIgnoredDirs[dir] = struct{}{} require.NoError(t, os.Remove(filepath.Join(dir, metaFilename))) } { // Tmp blocks during creation; those should be removed on start. dir := createBlock(t, tmpDir, genSeries(10, 2, 30, 40)) require.NoError(t, fileutil.Replace(dir, dir+tmpForCreationBlockDirSuffix)) expectedRemovedDirs[dir+tmpForCreationBlockDirSuffix] = struct{}{} // Tmp blocks during deletion; those should be removed on start. dir = createBlock(t, tmpDir, genSeries(10, 2, 40, 50)) require.NoError(t, fileutil.Replace(dir, dir+tmpForDeletionBlockDirSuffix)) expectedRemovedDirs[dir+tmpForDeletionBlockDirSuffix] = struct{}{} // Pre-2.21 tmp blocks; those should be removed on start. dir = createBlock(t, tmpDir, genSeries(10, 2, 50, 60)) require.NoError(t, fileutil.Replace(dir, dir+tmpLegacy)) expectedRemovedDirs[dir+tmpLegacy] = struct{}{} } { // One ok block; but two should be replaced. dir := createBlock(t, tmpDir, genSeries(10, 2, 50, 60)) expectedLoadedDirs[dir] = struct{}{} m, _, err := readMetaFile(dir) require.NoError(t, err) compacted := createBlock(t, tmpDir, genSeries(10, 2, 50, 55)) expectedRemovedDirs[compacted] = struct{}{} m.Compaction.Parents = append(m.Compaction.Parents, BlockDesc{ULID: ulid.MustParse(filepath.Base(compacted))}, BlockDesc{ULID: ulid.MustNew(1, nil)}, BlockDesc{ULID: ulid.MustNew(123, nil)}, ) // Regression test: Already removed parent can be still in list, which was causing Open errors. m.Compaction.Parents = append(m.Compaction.Parents, BlockDesc{ULID: ulid.MustParse(filepath.Base(compacted))}) m.Compaction.Parents = append(m.Compaction.Parents, BlockDesc{ULID: ulid.MustParse(filepath.Base(compacted))}) _, err = writeMetaFile(log.NewLogfmtLogger(os.Stderr), dir, m) require.NoError(t, err) } opts := DefaultOptions() opts.RetentionDuration = 0 db, err := Open(tmpDir, log.NewLogfmtLogger(os.Stderr), nil, opts, nil) require.NoError(t, err) loadedBlocks := db.Blocks() var loaded int for _, l := range loadedBlocks { if _, ok := expectedLoadedDirs[filepath.Join(tmpDir, l.meta.ULID.String())]; !ok { t.Fatal("unexpected block", l.meta.ULID, "was loaded") } loaded++ } require.Equal(t, len(expectedLoadedDirs), loaded) require.NoError(t, db.Close()) files, err := ioutil.ReadDir(tmpDir) require.NoError(t, err) var ignored int for _, f := range files { if _, ok := expectedRemovedDirs[filepath.Join(tmpDir, f.Name())]; ok { t.Fatal("expected", filepath.Join(tmpDir, f.Name()), "to be removed, but still exists") } if _, ok := expectedIgnoredDirs[filepath.Join(tmpDir, f.Name())]; ok { ignored++ } } require.Equal(t, len(expectedIgnoredDirs), ignored) } func TestOneCheckpointPerCompactCall(t *testing.T) { blockRange := int64(1000) tsdbCfg := &Options{ RetentionDuration: blockRange * 1000, NoLockfile: true, MinBlockDuration: blockRange, MaxBlockDuration: blockRange, } tmpDir, err := ioutil.TempDir("", "test") require.NoError(t, err) t.Cleanup(func() { require.NoError(t, os.RemoveAll(tmpDir)) }) db, err := Open(tmpDir, log.NewNopLogger(), prometheus.NewRegistry(), tsdbCfg, nil) require.NoError(t, err) t.Cleanup(func() { require.NoError(t, db.Close()) }) db.DisableCompactions() // Case 1: Lot's of uncompacted data in Head. lbls := labels.Labels{labels.Label{Name: "foo_d", Value: "choco_bar"}} // Append samples spanning 59 block ranges. app := db.Appender(context.Background()) for i := int64(0); i < 60; i++ { _, err := app.Append(0, lbls, blockRange*i, rand.Float64()) require.NoError(t, err) _, err = app.Append(0, lbls, (blockRange*i)+blockRange/2, rand.Float64()) require.NoError(t, err) // Rotate the WAL file so that there is >3 files for checkpoint to happen. require.NoError(t, db.head.wal.NextSegment()) } require.NoError(t, app.Commit()) // Check the existing WAL files. first, last, err := wal.Segments(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 0, first) require.Equal(t, 60, last) require.Equal(t, 0.0, prom_testutil.ToFloat64(db.head.metrics.checkpointCreationTotal)) require.NoError(t, db.Compact()) require.Equal(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.checkpointCreationTotal)) // As the data spans for 59 blocks, 58 go to disk and 1 remains in Head. require.Equal(t, 58, len(db.Blocks())) // Though WAL was truncated only once, head should be truncated after each compaction. require.Equal(t, 58.0, prom_testutil.ToFloat64(db.head.metrics.headTruncateTotal)) // The compaction should have only truncated first 2/3 of WAL (while also rotating the files). first, last, err = wal.Segments(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 40, first) require.Equal(t, 61, last) // The first checkpoint would be for first 2/3rd of WAL, hence till 39. // That should be the last checkpoint. _, cno, err := wal.LastCheckpoint(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 39, cno) // Case 2: Old blocks on disk. // The above blocks will act as old blocks. // Creating a block to cover the data in the Head so that // Head will skip the data during replay and start fresh. blocks := db.Blocks() newBlockMint := blocks[len(blocks)-1].Meta().MaxTime newBlockMaxt := db.Head().MaxTime() + 1 require.NoError(t, db.Close()) createBlock(t, db.dir, genSeries(1, 1, newBlockMint, newBlockMaxt)) db, err = Open(db.dir, log.NewNopLogger(), prometheus.NewRegistry(), tsdbCfg, nil) require.NoError(t, err) db.DisableCompactions() // 1 block more. require.Equal(t, 59, len(db.Blocks())) // No series in Head because of this new block. require.Equal(t, 0, int(db.head.NumSeries())) // Adding sample way into the future. app = db.Appender(context.Background()) _, err = app.Append(0, lbls, blockRange*120, rand.Float64()) require.NoError(t, err) require.NoError(t, app.Commit()) // The mint of head is the last block maxt, that means the gap between mint and maxt // of Head is too large. This will trigger many compactions. require.Equal(t, newBlockMaxt, db.head.MinTime()) // Another WAL file was rotated. first, last, err = wal.Segments(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 40, first) require.Equal(t, 62, last) require.Equal(t, 0.0, prom_testutil.ToFloat64(db.head.metrics.checkpointCreationTotal)) require.NoError(t, db.Compact()) require.Equal(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.checkpointCreationTotal)) // No new blocks should be created as there was not data in between the new samples and the blocks. require.Equal(t, 59, len(db.Blocks())) // The compaction should have only truncated first 2/3 of WAL (while also rotating the files). first, last, err = wal.Segments(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 55, first) require.Equal(t, 63, last) // The first checkpoint would be for first 2/3rd of WAL, hence till 54. // That should be the last checkpoint. _, cno, err = wal.LastCheckpoint(db.head.wal.Dir()) require.NoError(t, err) require.Equal(t, 54, cno) } func TestNoPanicOnTSDBOpenError(t *testing.T) { tmpdir, err := ioutil.TempDir("", "test") require.NoError(t, err) t.Cleanup(func() { require.NoError(t, os.RemoveAll(tmpdir)) }) absdir, err := filepath.Abs(tmpdir) require.NoError(t, err) // Taking the file lock will cause TSDB startup error. lockf, _, err := fileutil.Flock(filepath.Join(absdir, "lock")) require.NoError(t, err) _, err = Open(tmpdir, nil, nil, DefaultOptions(), nil) require.Error(t, err) require.NoError(t, lockf.Release()) } func TestLockfileMetric(t *testing.T) { cases := []struct { fileAlreadyExists bool lockFileDisabled bool expectedValue int }{ { fileAlreadyExists: false, lockFileDisabled: false, expectedValue: lockfileCreatedCleanly, }, { fileAlreadyExists: true, lockFileDisabled: false, expectedValue: lockfileReplaced, }, { fileAlreadyExists: true, lockFileDisabled: true, expectedValue: lockfileDisabled, }, { fileAlreadyExists: false, lockFileDisabled: true, expectedValue: lockfileDisabled, }, } for _, c := range cases { t.Run(fmt.Sprintf("%+v", c), func(t *testing.T) { tmpdir, err := ioutil.TempDir("", "test") require.NoError(t, err) t.Cleanup(func() { require.NoError(t, os.RemoveAll(tmpdir)) }) absdir, err := filepath.Abs(tmpdir) require.NoError(t, err) // Test preconditions (file already exists + lockfile option) lockfilePath := filepath.Join(absdir, "lock") if c.fileAlreadyExists { err = ioutil.WriteFile(lockfilePath, []byte{}, 0644) require.NoError(t, err) } opts := DefaultOptions() opts.NoLockfile = c.lockFileDisabled // Create the DB, this should create a lockfile and the metrics db, err := Open(tmpdir, nil, nil, opts, nil) require.NoError(t, err) require.Equal(t, float64(c.expectedValue), prom_testutil.ToFloat64(db.metrics.lockfileCreatedCleanly)) // Close the DB, this should delete the lockfile require.NoError(t, db.Close()) // Check that the lockfile is always deleted if !c.lockFileDisabled { _, err = os.Stat(lockfilePath) require.Error(t, err, "lockfile was not deleted") } }) } } func TestQuerier_ShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t *testing.T) { t.Skip("TODO: investigate why process crash in CI") const numRuns = 5 for i := 1; i <= numRuns; i++ { t.Run(strconv.Itoa(i), func(t *testing.T) { testQuerierShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t) }) } } func testQuerierShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t *testing.T) { const ( numSeries = 1000 numStressIterations = 10000 minStressAllocationBytes = 128 * 1024 maxStressAllocationBytes = 512 * 1024 ) db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() // Disable compactions so we can control it. db.DisableCompactions() // Generate the metrics we're going to append. metrics := make([]labels.Labels, 0, numSeries) for i := 0; i < numSeries; i++ { metrics = append(metrics, labels.Labels{{Name: labels.MetricName, Value: fmt.Sprintf("test_%d", i)}}) } // Push 1 sample every 15s for 2x the block duration period. ctx := context.Background() interval := int64(15 * time.Second / time.Millisecond) ts := int64(0) for ; ts < 2*DefaultBlockDuration; ts += interval { app := db.Appender(ctx) for _, metric := range metrics { _, err := app.Append(0, metric, ts, float64(ts)) require.NoError(t, err) } require.NoError(t, app.Commit()) } // Compact the TSDB head for the first time. We expect the head chunks file has been cut. require.NoError(t, db.Compact()) require.Equal(t, float64(1), prom_testutil.ToFloat64(db.Head().metrics.headTruncateTotal)) // Push more samples for another 1x block duration period. for ; ts < 3*DefaultBlockDuration; ts += interval { app := db.Appender(ctx) for _, metric := range metrics { _, err := app.Append(0, metric, ts, float64(ts)) require.NoError(t, err) } require.NoError(t, app.Commit()) } // At this point we expect 2 mmap-ed head chunks. // Get a querier and make sure it's closed only once the test is over. querier, err := db.Querier(ctx, 0, math.MaxInt64) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() // Query back all series. hints := &storage.SelectHints{Start: 0, End: math.MaxInt64, Step: interval} seriesSet := querier.Select(true, hints, labels.MustNewMatcher(labels.MatchRegexp, labels.MetricName, ".+")) // Fetch samples iterators from all series. var iterators []chunkenc.Iterator actualSeries := 0 for seriesSet.Next() { actualSeries++ // Get the iterator and call Next() so that we're sure the chunk is loaded. it := seriesSet.At().Iterator() it.Next() it.At() iterators = append(iterators, it) } require.NoError(t, seriesSet.Err()) require.Equal(t, actualSeries, numSeries) // Compact the TSDB head again. require.NoError(t, db.Compact()) require.Equal(t, float64(2), prom_testutil.ToFloat64(db.Head().metrics.headTruncateTotal)) // At this point we expect 1 head chunk has been deleted. // Stress the memory and call GC. This is required to increase the chances // the chunk memory area is released to the kernel. var buf []byte for i := 0; i < numStressIterations; i++ { //nolint:staticcheck buf = append(buf, make([]byte, minStressAllocationBytes+rand.Int31n(maxStressAllocationBytes-minStressAllocationBytes))...) if i%1000 == 0 { buf = nil } } // Iterate samples. Here we're summing it just to make sure no golang compiler // optimization triggers in case we discard the result of it.At(). var sum float64 var firstErr error for _, it := range iterators { for it.Next() { _, v := it.At() sum += v } if err := it.Err(); err != nil { firstErr = err } } // After having iterated all samples we also want to be sure no error occurred or // the "cannot populate chunk XXX: not found" error occurred. This error can occur // when the iterator tries to fetch an head chunk which has been offloaded because // of the head compaction in the meanwhile. if firstErr != nil && !strings.Contains(firstErr.Error(), "cannot populate chunk") { t.Fatalf("unexpected error: %s", firstErr.Error()) } } func TestChunkQuerier_ShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t *testing.T) { t.Skip("TODO: investigate why process crash in CI") const numRuns = 5 for i := 1; i <= numRuns; i++ { t.Run(strconv.Itoa(i), func(t *testing.T) { testChunkQuerierShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t) }) } } func testChunkQuerierShouldNotPanicIfHeadChunkIsTruncatedWhileReadingQueriedChunks(t *testing.T) { const ( numSeries = 1000 numStressIterations = 10000 minStressAllocationBytes = 128 * 1024 maxStressAllocationBytes = 512 * 1024 ) db := openTestDB(t, nil, nil) defer func() { require.NoError(t, db.Close()) }() // Disable compactions so we can control it. db.DisableCompactions() // Generate the metrics we're going to append. metrics := make([]labels.Labels, 0, numSeries) for i := 0; i < numSeries; i++ { metrics = append(metrics, labels.Labels{{Name: labels.MetricName, Value: fmt.Sprintf("test_%d", i)}}) } // Push 1 sample every 15s for 2x the block duration period. ctx := context.Background() interval := int64(15 * time.Second / time.Millisecond) ts := int64(0) for ; ts < 2*DefaultBlockDuration; ts += interval { app := db.Appender(ctx) for _, metric := range metrics { _, err := app.Append(0, metric, ts, float64(ts)) require.NoError(t, err) } require.NoError(t, app.Commit()) } // Compact the TSDB head for the first time. We expect the head chunks file has been cut. require.NoError(t, db.Compact()) require.Equal(t, float64(1), prom_testutil.ToFloat64(db.Head().metrics.headTruncateTotal)) // Push more samples for another 1x block duration period. for ; ts < 3*DefaultBlockDuration; ts += interval { app := db.Appender(ctx) for _, metric := range metrics { _, err := app.Append(0, metric, ts, float64(ts)) require.NoError(t, err) } require.NoError(t, app.Commit()) } // At this point we expect 2 mmap-ed head chunks. // Get a querier and make sure it's closed only once the test is over. querier, err := db.ChunkQuerier(ctx, 0, math.MaxInt64) require.NoError(t, err) defer func() { require.NoError(t, querier.Close()) }() // Query back all series. hints := &storage.SelectHints{Start: 0, End: math.MaxInt64, Step: interval} seriesSet := querier.Select(true, hints, labels.MustNewMatcher(labels.MatchRegexp, labels.MetricName, ".+")) // Iterate all series and get their chunks. var chunks []chunkenc.Chunk actualSeries := 0 for seriesSet.Next() { actualSeries++ for it := seriesSet.At().Iterator(); it.Next(); { chunks = append(chunks, it.At().Chunk) } } require.NoError(t, seriesSet.Err()) require.Equal(t, actualSeries, numSeries) // Compact the TSDB head again. require.NoError(t, db.Compact()) require.Equal(t, float64(2), prom_testutil.ToFloat64(db.Head().metrics.headTruncateTotal)) // At this point we expect 1 head chunk has been deleted. // Stress the memory and call GC. This is required to increase the chances // the chunk memory area is released to the kernel. var buf []byte for i := 0; i < numStressIterations; i++ { //nolint:staticcheck buf = append(buf, make([]byte, minStressAllocationBytes+rand.Int31n(maxStressAllocationBytes-minStressAllocationBytes))...) if i%1000 == 0 { buf = nil } } // Iterate chunks and read their bytes slice. Here we're computing the CRC32 // just to iterate through the bytes slice. We don't really care the reason why // we read this data, we just need to read it to make sure the memory address // of the []byte is still valid. chkCRC32 := newCRC32() for _, chunk := range chunks { chkCRC32.Reset() _, err := chkCRC32.Write(chunk.Bytes()) require.NoError(t, err) } } func newTestDB(t *testing.T) *DB { dir, err := ioutil.TempDir("", "test") require.NoError(t, err) t.Cleanup(func() { require.NoError(t, os.RemoveAll(dir)) }) db, err := Open(dir, nil, nil, DefaultOptions(), nil) require.NoError(t, err) t.Cleanup(func() { require.NoError(t, db.Close()) }) return db }