881 lines
26 KiB
Go
881 lines
26 KiB
Go
// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package agent
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import (
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"context"
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"fmt"
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"path/filepath"
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"strconv"
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"testing"
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"time"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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dto "github.com/prometheus/client_model/go"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/exemplar"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/storage/remote"
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"github.com/prometheus/prometheus/tsdb"
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"github.com/prometheus/prometheus/tsdb/chunks"
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"github.com/prometheus/prometheus/tsdb/record"
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"github.com/prometheus/prometheus/tsdb/tsdbutil"
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"github.com/prometheus/prometheus/tsdb/wlog"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestDB_InvalidSeries(t *testing.T) {
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s := createTestAgentDB(t, nil, DefaultOptions())
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defer s.Close()
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app := s.Appender(context.Background())
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t.Run("Samples", func(t *testing.T) {
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_, err := app.Append(0, labels.Labels{}, 0, 0)
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require.ErrorIs(t, err, tsdb.ErrInvalidSample, "should reject empty labels")
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_, err = app.Append(0, labels.FromStrings("a", "1", "a", "2"), 0, 0)
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require.ErrorIs(t, err, tsdb.ErrInvalidSample, "should reject duplicate labels")
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})
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t.Run("Histograms", func(t *testing.T) {
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_, err := app.AppendHistogram(0, labels.Labels{}, 0, tsdbutil.GenerateTestHistograms(1)[0], nil)
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require.ErrorIs(t, err, tsdb.ErrInvalidSample, "should reject empty labels")
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_, err = app.AppendHistogram(0, labels.FromStrings("a", "1", "a", "2"), 0, tsdbutil.GenerateTestHistograms(1)[0], nil)
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require.ErrorIs(t, err, tsdb.ErrInvalidSample, "should reject duplicate labels")
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})
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t.Run("Exemplars", func(t *testing.T) {
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sRef, err := app.Append(0, labels.FromStrings("a", "1"), 0, 0)
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require.NoError(t, err, "should not reject valid series")
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_, err = app.AppendExemplar(0, labels.EmptyLabels(), exemplar.Exemplar{})
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require.EqualError(t, err, "unknown series ref when trying to add exemplar: 0")
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e := exemplar.Exemplar{Labels: labels.FromStrings("a", "1", "a", "2")}
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_, err = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
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require.ErrorIs(t, err, tsdb.ErrInvalidExemplar, "should reject duplicate labels")
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e = exemplar.Exemplar{Labels: labels.FromStrings("a_somewhat_long_trace_id", "nYJSNtFrFTY37VR7mHzEE/LIDt7cdAQcuOzFajgmLDAdBSRHYPDzrxhMA4zz7el8naI/AoXFv9/e/G0vcETcIoNUi3OieeLfaIRQci2oa")}
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_, err = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
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require.ErrorIs(t, err, storage.ErrExemplarLabelLength, "should reject too long label length")
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// Inverse check
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e = exemplar.Exemplar{Labels: labels.FromStrings("a", "1"), Value: 20, Ts: 10, HasTs: true}
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_, err = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
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require.NoError(t, err, "should not reject valid exemplars")
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})
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}
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func createTestAgentDB(t *testing.T, reg prometheus.Registerer, opts *Options) *DB {
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t.Helper()
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dbDir := t.TempDir()
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rs := remote.NewStorage(log.NewNopLogger(), reg, startTime, dbDir, time.Second*30, nil)
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t.Cleanup(func() {
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require.NoError(t, rs.Close())
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})
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db, err := Open(log.NewNopLogger(), reg, rs, dbDir, opts)
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require.NoError(t, err)
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return db
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}
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func TestUnsupportedFunctions(t *testing.T) {
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s := createTestAgentDB(t, nil, DefaultOptions())
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defer s.Close()
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t.Run("Querier", func(t *testing.T) {
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_, err := s.Querier(0, 0)
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require.Equal(t, err, ErrUnsupported)
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})
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t.Run("ChunkQuerier", func(t *testing.T) {
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_, err := s.ChunkQuerier(0, 0)
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require.Equal(t, err, ErrUnsupported)
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})
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t.Run("ExemplarQuerier", func(t *testing.T) {
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_, err := s.ExemplarQuerier(context.TODO())
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require.Equal(t, err, ErrUnsupported)
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})
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}
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func TestCommit(t *testing.T) {
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const (
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numDatapoints = 1000
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numHistograms = 100
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numSeries = 8
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)
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s := createTestAgentDB(t, nil, DefaultOptions())
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app := s.Appender(context.TODO())
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lbls := labelsForTest(t.Name(), numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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for i := 0; i < numDatapoints; i++ {
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sample := chunks.GenerateSamples(0, 1)
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ref, err := app.Append(0, lset, sample[0].T(), sample[0].F())
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require.NoError(t, err)
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e := exemplar.Exemplar{
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Labels: lset,
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Ts: sample[0].T() + int64(i),
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Value: sample[0].F(),
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HasTs: true,
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}
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_, err = app.AppendExemplar(ref, lset, e)
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require.NoError(t, err)
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}
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}
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lbls = labelsForTest(t.Name()+"_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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histograms := tsdbutil.GenerateTestHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(i), histograms[i], nil)
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require.NoError(t, err)
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}
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}
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lbls = labelsForTest(t.Name()+"_float_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(i), nil, floatHistograms[i])
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require.NoError(t, err)
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}
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}
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require.NoError(t, app.Commit())
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require.NoError(t, s.Close())
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sr, err := wlog.NewSegmentsReader(s.wal.Dir())
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require.NoError(t, err)
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defer func() {
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require.NoError(t, sr.Close())
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}()
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// Read records from WAL and check for expected count of series, samples, and exemplars.
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var (
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r = wlog.NewReader(sr)
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dec record.Decoder
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walSeriesCount, walSamplesCount, walExemplarsCount, walHistogramCount, walFloatHistogramCount int
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)
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for r.Next() {
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rec := r.Record()
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switch dec.Type(rec) {
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case record.Series:
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var series []record.RefSeries
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series, err = dec.Series(rec, series)
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require.NoError(t, err)
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walSeriesCount += len(series)
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case record.Samples:
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var samples []record.RefSample
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samples, err = dec.Samples(rec, samples)
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require.NoError(t, err)
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walSamplesCount += len(samples)
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case record.HistogramSamples:
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var histograms []record.RefHistogramSample
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histograms, err = dec.HistogramSamples(rec, histograms)
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require.NoError(t, err)
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walHistogramCount += len(histograms)
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case record.FloatHistogramSamples:
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var floatHistograms []record.RefFloatHistogramSample
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floatHistograms, err = dec.FloatHistogramSamples(rec, floatHistograms)
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require.NoError(t, err)
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walFloatHistogramCount += len(floatHistograms)
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case record.Exemplars:
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var exemplars []record.RefExemplar
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exemplars, err = dec.Exemplars(rec, exemplars)
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require.NoError(t, err)
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walExemplarsCount += len(exemplars)
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default:
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}
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}
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// Check that the WAL contained the same number of committed series/samples/exemplars.
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require.Equal(t, numSeries*3, walSeriesCount, "unexpected number of series")
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require.Equal(t, numSeries*numDatapoints, walSamplesCount, "unexpected number of samples")
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require.Equal(t, numSeries*numDatapoints, walExemplarsCount, "unexpected number of exemplars")
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require.Equal(t, numSeries*numHistograms, walHistogramCount, "unexpected number of histograms")
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require.Equal(t, numSeries*numHistograms, walFloatHistogramCount, "unexpected number of float histograms")
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}
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func TestRollback(t *testing.T) {
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const (
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numDatapoints = 1000
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numHistograms = 100
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numSeries = 8
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)
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s := createTestAgentDB(t, nil, DefaultOptions())
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app := s.Appender(context.TODO())
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lbls := labelsForTest(t.Name(), numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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for i := 0; i < numDatapoints; i++ {
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sample := chunks.GenerateSamples(0, 1)
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_, err := app.Append(0, lset, sample[0].T(), sample[0].F())
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require.NoError(t, err)
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}
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}
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lbls = labelsForTest(t.Name()+"_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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histograms := tsdbutil.GenerateTestHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(i), histograms[i], nil)
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require.NoError(t, err)
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}
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}
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lbls = labelsForTest(t.Name()+"_float_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(i), nil, floatHistograms[i])
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require.NoError(t, err)
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}
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}
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// Do a rollback, which should clear uncommitted data. A followup call to
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// commit should persist nothing to the WAL.
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require.NoError(t, app.Rollback())
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require.NoError(t, app.Commit())
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require.NoError(t, s.Close())
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sr, err := wlog.NewSegmentsReader(s.wal.Dir())
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require.NoError(t, err)
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defer func() {
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require.NoError(t, sr.Close())
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}()
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// Read records from WAL and check for expected count of series and samples.
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var (
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r = wlog.NewReader(sr)
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dec record.Decoder
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walSeriesCount, walSamplesCount, walHistogramCount, walFloatHistogramCount, walExemplarsCount int
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)
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for r.Next() {
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rec := r.Record()
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switch dec.Type(rec) {
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case record.Series:
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var series []record.RefSeries
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series, err = dec.Series(rec, series)
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require.NoError(t, err)
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walSeriesCount += len(series)
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case record.Samples:
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var samples []record.RefSample
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samples, err = dec.Samples(rec, samples)
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require.NoError(t, err)
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walSamplesCount += len(samples)
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case record.Exemplars:
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var exemplars []record.RefExemplar
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exemplars, err = dec.Exemplars(rec, exemplars)
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require.NoError(t, err)
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walExemplarsCount += len(exemplars)
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case record.HistogramSamples:
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var histograms []record.RefHistogramSample
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histograms, err = dec.HistogramSamples(rec, histograms)
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require.NoError(t, err)
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walHistogramCount += len(histograms)
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case record.FloatHistogramSamples:
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var floatHistograms []record.RefFloatHistogramSample
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floatHistograms, err = dec.FloatHistogramSamples(rec, floatHistograms)
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require.NoError(t, err)
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walFloatHistogramCount += len(floatHistograms)
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default:
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}
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}
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// Check that only series get stored after calling Rollback.
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require.Equal(t, numSeries*3, walSeriesCount, "series should have been written to WAL")
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require.Equal(t, 0, walSamplesCount, "samples should not have been written to WAL")
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require.Equal(t, 0, walExemplarsCount, "exemplars should not have been written to WAL")
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require.Equal(t, 0, walHistogramCount, "histograms should not have been written to WAL")
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require.Equal(t, 0, walFloatHistogramCount, "float histograms should not have been written to WAL")
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}
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func TestFullTruncateWAL(t *testing.T) {
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const (
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numDatapoints = 1000
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numHistograms = 100
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numSeries = 800
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lastTs = 500
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)
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reg := prometheus.NewRegistry()
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opts := DefaultOptions()
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opts.TruncateFrequency = time.Minute * 2
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s := createTestAgentDB(t, reg, opts)
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defer func() {
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require.NoError(t, s.Close())
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}()
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app := s.Appender(context.TODO())
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lbls := labelsForTest(t.Name(), numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.Append(0, lset, int64(lastTs), 0)
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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lbls = labelsForTest(t.Name()+"_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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histograms := tsdbutil.GenerateTestHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(lastTs), histograms[i], nil)
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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lbls = labelsForTest(t.Name()+"_float_histogram", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
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for i := 0; i < numHistograms; i++ {
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_, err := app.AppendHistogram(0, lset, int64(lastTs), nil, floatHistograms[i])
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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// Truncate WAL with mint to GC all the samples.
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s.truncate(lastTs + 1)
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m := gatherFamily(t, reg, "prometheus_agent_deleted_series")
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require.Equal(t, float64(numSeries*3), m.Metric[0].Gauge.GetValue(), "agent wal truncate mismatch of deleted series count")
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}
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func TestPartialTruncateWAL(t *testing.T) {
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const (
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numDatapoints = 1000
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numSeries = 800
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)
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opts := DefaultOptions()
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opts.TruncateFrequency = time.Minute * 2
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reg := prometheus.NewRegistry()
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s := createTestAgentDB(t, reg, opts)
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defer func() {
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require.NoError(t, s.Close())
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}()
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app := s.Appender(context.TODO())
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// Create first batch of 800 series with 1000 data-points with a fixed lastTs as 500.
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var lastTs int64 = 500
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lbls := labelsForTest(t.Name()+"batch-1", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.Append(0, lset, lastTs, 0)
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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lbls = labelsForTest(t.Name()+"_histogram_batch-1", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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histograms := tsdbutil.GenerateTestHistograms(numDatapoints)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.AppendHistogram(0, lset, lastTs, histograms[i], nil)
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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lbls = labelsForTest(t.Name()+"_float_histogram_batch-1", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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floatHistograms := tsdbutil.GenerateTestFloatHistograms(numDatapoints)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.AppendHistogram(0, lset, lastTs, nil, floatHistograms[i])
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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// Create second batch of 800 series with 1000 data-points with a fixed lastTs as 600.
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lastTs = 600
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lbls = labelsForTest(t.Name()+"batch-2", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.Append(0, lset, lastTs, 0)
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require.NoError(t, err)
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}
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require.NoError(t, app.Commit())
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}
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lbls = labelsForTest(t.Name()+"_histogram_batch-2", numSeries)
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for _, l := range lbls {
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lset := labels.New(l...)
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histograms := tsdbutil.GenerateTestHistograms(numDatapoints)
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for i := 0; i < numDatapoints; i++ {
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_, err := app.AppendHistogram(0, lset, lastTs, histograms[i], nil)
|
|
require.NoError(t, err)
|
|
}
|
|
require.NoError(t, app.Commit())
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_float_histogram_batch-2", numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
floatHistograms := tsdbutil.GenerateTestFloatHistograms(numDatapoints)
|
|
|
|
for i := 0; i < numDatapoints; i++ {
|
|
_, err := app.AppendHistogram(0, lset, lastTs, nil, floatHistograms[i])
|
|
require.NoError(t, err)
|
|
}
|
|
require.NoError(t, app.Commit())
|
|
}
|
|
|
|
// Truncate WAL with mint to GC only the first batch of 800 series and retaining 2nd batch of 800 series.
|
|
s.truncate(lastTs - 1)
|
|
|
|
m := gatherFamily(t, reg, "prometheus_agent_deleted_series")
|
|
require.Equal(t, float64(numSeries*3), m.Metric[0].Gauge.GetValue(), "agent wal truncate mismatch of deleted series count")
|
|
}
|
|
|
|
func TestWALReplay(t *testing.T) {
|
|
const (
|
|
numDatapoints = 1000
|
|
numHistograms = 100
|
|
numSeries = 8
|
|
lastTs = 500
|
|
)
|
|
|
|
s := createTestAgentDB(t, nil, DefaultOptions())
|
|
app := s.Appender(context.TODO())
|
|
|
|
lbls := labelsForTest(t.Name(), numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
for i := 0; i < numDatapoints; i++ {
|
|
_, err := app.Append(0, lset, lastTs, 0)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_histogram", numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
histograms := tsdbutil.GenerateTestHistograms(numHistograms)
|
|
|
|
for i := 0; i < numHistograms; i++ {
|
|
_, err := app.AppendHistogram(0, lset, lastTs, histograms[i], nil)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_float_histogram", numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
|
|
|
|
for i := 0; i < numHistograms; i++ {
|
|
_, err := app.AppendHistogram(0, lset, lastTs, nil, floatHistograms[i])
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
require.NoError(t, app.Commit())
|
|
require.NoError(t, s.Close())
|
|
|
|
// Hack: s.wal.Dir() is the /wal subdirectory of the original storage path.
|
|
// We need the original directory so we can recreate the storage for replay.
|
|
storageDir := filepath.Dir(s.wal.Dir())
|
|
|
|
reg := prometheus.NewRegistry()
|
|
replayStorage, err := Open(s.logger, reg, nil, storageDir, s.opts)
|
|
if err != nil {
|
|
t.Fatalf("unable to create storage for the agent: %v", err)
|
|
}
|
|
defer func() {
|
|
require.NoError(t, replayStorage.Close())
|
|
}()
|
|
|
|
// Check if all the series are retrieved back from the WAL.
|
|
m := gatherFamily(t, reg, "prometheus_agent_active_series")
|
|
require.Equal(t, float64(numSeries*3), m.Metric[0].Gauge.GetValue(), "agent wal replay mismatch of active series count")
|
|
|
|
// Check if lastTs of the samples retrieved from the WAL is retained.
|
|
metrics := replayStorage.series.series
|
|
for i := 0; i < len(metrics); i++ {
|
|
mp := metrics[i]
|
|
for _, v := range mp {
|
|
require.Equal(t, v.lastTs, int64(lastTs))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestLockfile(t *testing.T) {
|
|
tsdbutil.TestDirLockerUsage(t, func(t *testing.T, data string, createLock bool) (*tsdbutil.DirLocker, testutil.Closer) {
|
|
logger := log.NewNopLogger()
|
|
reg := prometheus.NewRegistry()
|
|
rs := remote.NewStorage(logger, reg, startTime, data, time.Second*30, nil)
|
|
t.Cleanup(func() {
|
|
require.NoError(t, rs.Close())
|
|
})
|
|
|
|
opts := DefaultOptions()
|
|
opts.NoLockfile = !createLock
|
|
|
|
// Create the DB. This should create lockfile and its metrics.
|
|
db, err := Open(logger, nil, rs, data, opts)
|
|
require.NoError(t, err)
|
|
|
|
return db.locker, testutil.NewCallbackCloser(func() {
|
|
require.NoError(t, db.Close())
|
|
})
|
|
})
|
|
}
|
|
|
|
func Test_ExistingWAL_NextRef(t *testing.T) {
|
|
dbDir := t.TempDir()
|
|
rs := remote.NewStorage(log.NewNopLogger(), nil, startTime, dbDir, time.Second*30, nil)
|
|
defer func() {
|
|
require.NoError(t, rs.Close())
|
|
}()
|
|
|
|
db, err := Open(log.NewNopLogger(), nil, rs, dbDir, DefaultOptions())
|
|
require.NoError(t, err)
|
|
|
|
seriesCount := 10
|
|
|
|
// Append <seriesCount> series
|
|
app := db.Appender(context.Background())
|
|
for i := 0; i < seriesCount; i++ {
|
|
lset := labels.FromStrings(model.MetricNameLabel, fmt.Sprintf("series_%d", i))
|
|
_, err := app.Append(0, lset, 0, 100)
|
|
require.NoError(t, err)
|
|
}
|
|
|
|
histogramCount := 10
|
|
histograms := tsdbutil.GenerateTestHistograms(histogramCount)
|
|
// Append <histogramCount> series
|
|
for i := 0; i < histogramCount; i++ {
|
|
lset := labels.FromStrings(model.MetricNameLabel, fmt.Sprintf("histogram_%d", i))
|
|
_, err := app.AppendHistogram(0, lset, 0, histograms[i], nil)
|
|
require.NoError(t, err)
|
|
}
|
|
require.NoError(t, app.Commit())
|
|
|
|
// Truncate the WAL to force creation of a new segment.
|
|
require.NoError(t, db.truncate(0))
|
|
require.NoError(t, db.Close())
|
|
|
|
// Create a new storage and see what nextRef is initialized to.
|
|
db, err = Open(log.NewNopLogger(), nil, rs, dbDir, DefaultOptions())
|
|
require.NoError(t, err)
|
|
defer require.NoError(t, db.Close())
|
|
|
|
require.Equal(t, uint64(seriesCount+histogramCount), db.nextRef.Load(), "nextRef should be equal to the number of series written across the entire WAL")
|
|
}
|
|
|
|
func Test_validateOptions(t *testing.T) {
|
|
t.Run("Apply defaults to zero values", func(t *testing.T) {
|
|
opts := validateOptions(&Options{})
|
|
require.Equal(t, DefaultOptions(), opts)
|
|
})
|
|
|
|
t.Run("Defaults are already valid", func(t *testing.T) {
|
|
require.Equal(t, DefaultOptions(), validateOptions(nil))
|
|
})
|
|
|
|
t.Run("MaxWALTime should not be lower than TruncateFrequency", func(t *testing.T) {
|
|
opts := validateOptions(&Options{
|
|
MaxWALTime: int64(time.Hour / time.Millisecond),
|
|
TruncateFrequency: 2 * time.Hour,
|
|
})
|
|
require.Equal(t, int64(2*time.Hour/time.Millisecond), opts.MaxWALTime)
|
|
})
|
|
}
|
|
|
|
func startTime() (int64, error) {
|
|
return time.Now().Unix() * 1000, nil
|
|
}
|
|
|
|
// Create series for tests.
|
|
func labelsForTest(lName string, seriesCount int) [][]labels.Label {
|
|
var series [][]labels.Label
|
|
|
|
for i := 0; i < seriesCount; i++ {
|
|
lset := []labels.Label{
|
|
{Name: "a", Value: lName},
|
|
{Name: "instance", Value: "localhost" + strconv.Itoa(i)},
|
|
{Name: "job", Value: "prometheus"},
|
|
}
|
|
series = append(series, lset)
|
|
}
|
|
|
|
return series
|
|
}
|
|
|
|
func gatherFamily(t *testing.T, reg prometheus.Gatherer, familyName string) *dto.MetricFamily {
|
|
t.Helper()
|
|
|
|
families, err := reg.Gather()
|
|
require.NoError(t, err, "failed to gather metrics")
|
|
|
|
for _, f := range families {
|
|
if f.GetName() == familyName {
|
|
return f
|
|
}
|
|
}
|
|
|
|
t.Fatalf("could not find family %s", familyName)
|
|
|
|
return nil
|
|
}
|
|
|
|
func TestStorage_DuplicateExemplarsIgnored(t *testing.T) {
|
|
s := createTestAgentDB(t, nil, DefaultOptions())
|
|
app := s.Appender(context.Background())
|
|
defer s.Close()
|
|
|
|
sRef, err := app.Append(0, labels.FromStrings("a", "1"), 0, 0)
|
|
require.NoError(t, err, "should not reject valid series")
|
|
|
|
// Write a few exemplars to our appender and call Commit().
|
|
// If the Labels, Value or Timestamp are different than the last exemplar,
|
|
// then a new one should be appended; Otherwise, it should be skipped.
|
|
e := exemplar.Exemplar{Labels: labels.FromStrings("a", "1"), Value: 20, Ts: 10, HasTs: true}
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
|
|
e.Labels = labels.FromStrings("b", "2")
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
|
|
e.Value = 42
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
|
|
e.Ts = 25
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
_, _ = app.AppendExemplar(sRef, labels.EmptyLabels(), e)
|
|
|
|
require.NoError(t, app.Commit())
|
|
|
|
// Read back what was written to the WAL.
|
|
var walExemplarsCount int
|
|
sr, err := wlog.NewSegmentsReader(s.wal.Dir())
|
|
require.NoError(t, err)
|
|
defer sr.Close()
|
|
r := wlog.NewReader(sr)
|
|
|
|
var dec record.Decoder
|
|
for r.Next() {
|
|
rec := r.Record()
|
|
if dec.Type(rec) == record.Exemplars {
|
|
var exemplars []record.RefExemplar
|
|
exemplars, err = dec.Exemplars(rec, exemplars)
|
|
require.NoError(t, err)
|
|
walExemplarsCount += len(exemplars)
|
|
}
|
|
}
|
|
|
|
// We had 9 calls to AppendExemplar but only 4 of those should have gotten through.
|
|
require.Equal(t, 4, walExemplarsCount)
|
|
}
|
|
|
|
func TestDBAllowOOOSamples(t *testing.T) {
|
|
const (
|
|
numDatapoints = 5
|
|
numHistograms = 5
|
|
numSeries = 4
|
|
offset = 100
|
|
)
|
|
|
|
reg := prometheus.NewRegistry()
|
|
s := createTestAgentDB(t, reg, DefaultOptions())
|
|
app := s.Appender(context.TODO())
|
|
|
|
// Let's add some samples in the [offset, offset+numDatapoints) range.
|
|
lbls := labelsForTest(t.Name(), numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
for i := offset; i < numDatapoints+offset; i++ {
|
|
ref, err := app.Append(0, lset, int64(i), float64(i))
|
|
require.NoError(t, err)
|
|
|
|
e := exemplar.Exemplar{
|
|
Labels: lset,
|
|
Ts: int64(i) * 2,
|
|
Value: float64(i),
|
|
HasTs: true,
|
|
}
|
|
_, err = app.AppendExemplar(ref, lset, e)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_histogram", numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
histograms := tsdbutil.GenerateTestHistograms(numHistograms)
|
|
|
|
for i := offset; i < numDatapoints+offset; i++ {
|
|
_, err := app.AppendHistogram(0, lset, int64(i), histograms[i-offset], nil)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_float_histogram", numSeries)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
|
|
|
|
for i := offset; i < numDatapoints+offset; i++ {
|
|
_, err := app.AppendHistogram(0, lset, int64(i), nil, floatHistograms[i-offset])
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
require.NoError(t, app.Commit())
|
|
m := gatherFamily(t, reg, "prometheus_agent_samples_appended_total")
|
|
require.Equal(t, float64(20), m.Metric[0].Counter.GetValue(), "agent wal mismatch of total appended samples")
|
|
require.Equal(t, float64(40), m.Metric[1].Counter.GetValue(), "agent wal mismatch of total appended histograms")
|
|
require.NoError(t, s.Close())
|
|
|
|
// Hack: s.wal.Dir() is the /wal subdirectory of the original storage path.
|
|
// We need the original directory so we can recreate the storage for replay.
|
|
storageDir := filepath.Dir(s.wal.Dir())
|
|
|
|
// Replay the storage so that the lastTs for each series is recorded.
|
|
reg2 := prometheus.NewRegistry()
|
|
db, err := Open(s.logger, reg2, nil, storageDir, s.opts)
|
|
if err != nil {
|
|
t.Fatalf("unable to create storage for the agent: %v", err)
|
|
}
|
|
|
|
app = db.Appender(context.Background())
|
|
|
|
// Now the lastTs will have been recorded successfully.
|
|
// Let's try appending twice as many OOO samples in the [0, numDatapoints) range.
|
|
lbls = labelsForTest(t.Name()+"_histogram", numSeries*2)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
for i := 0; i < numDatapoints; i++ {
|
|
ref, err := app.Append(0, lset, int64(i), float64(i))
|
|
require.NoError(t, err)
|
|
|
|
e := exemplar.Exemplar{
|
|
Labels: lset,
|
|
Ts: int64(i) * 2,
|
|
Value: float64(i),
|
|
HasTs: true,
|
|
}
|
|
_, err = app.AppendExemplar(ref, lset, e)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_histogram", numSeries*2)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
histograms := tsdbutil.GenerateTestHistograms(numHistograms)
|
|
|
|
for i := 0; i < numDatapoints; i++ {
|
|
_, err := app.AppendHistogram(0, lset, int64(i), histograms[i], nil)
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
lbls = labelsForTest(t.Name()+"_float_histogram", numSeries*2)
|
|
for _, l := range lbls {
|
|
lset := labels.New(l...)
|
|
|
|
floatHistograms := tsdbutil.GenerateTestFloatHistograms(numHistograms)
|
|
|
|
for i := 0; i < numDatapoints; i++ {
|
|
_, err := app.AppendHistogram(0, lset, int64(i), nil, floatHistograms[i])
|
|
require.NoError(t, err)
|
|
}
|
|
}
|
|
|
|
require.NoError(t, app.Commit())
|
|
m = gatherFamily(t, reg2, "prometheus_agent_samples_appended_total")
|
|
require.Equal(t, float64(40), m.Metric[0].Counter.GetValue(), "agent wal mismatch of total appended samples")
|
|
require.Equal(t, float64(80), m.Metric[1].Counter.GetValue(), "agent wal mismatch of total appended histograms")
|
|
require.NoError(t, db.Close())
|
|
}
|