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254 lines
7 KiB
Go
254 lines
7 KiB
Go
// Copyright 2020 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 storage_test
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import (
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"context"
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"errors"
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"testing"
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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/labels"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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"github.com/prometheus/prometheus/util/annotations"
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"github.com/prometheus/prometheus/util/teststorage"
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)
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func TestFanout_SelectSorted(t *testing.T) {
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inputLabel := labels.FromStrings(model.MetricNameLabel, "a")
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outputLabel := labels.FromStrings(model.MetricNameLabel, "a")
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inputTotalSize := 0
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ctx := context.Background()
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priStorage := teststorage.New(t)
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defer priStorage.Close()
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app1 := priStorage.Appender(ctx)
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app1.Append(0, inputLabel, 0, 0)
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inputTotalSize++
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app1.Append(0, inputLabel, 1000, 1)
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inputTotalSize++
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app1.Append(0, inputLabel, 2000, 2)
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inputTotalSize++
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err := app1.Commit()
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require.NoError(t, err)
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remoteStorage1 := teststorage.New(t)
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defer remoteStorage1.Close()
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app2 := remoteStorage1.Appender(ctx)
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app2.Append(0, inputLabel, 3000, 3)
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inputTotalSize++
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app2.Append(0, inputLabel, 4000, 4)
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inputTotalSize++
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app2.Append(0, inputLabel, 5000, 5)
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inputTotalSize++
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err = app2.Commit()
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require.NoError(t, err)
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remoteStorage2 := teststorage.New(t)
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defer remoteStorage2.Close()
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app3 := remoteStorage2.Appender(ctx)
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app3.Append(0, inputLabel, 6000, 6)
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inputTotalSize++
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app3.Append(0, inputLabel, 7000, 7)
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inputTotalSize++
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app3.Append(0, inputLabel, 8000, 8)
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inputTotalSize++
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err = app3.Commit()
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require.NoError(t, err)
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fanoutStorage := storage.NewFanout(nil, priStorage, remoteStorage1, remoteStorage2)
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t.Run("querier", func(t *testing.T) {
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querier, err := fanoutStorage.Querier(0, 8000)
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require.NoError(t, err)
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defer querier.Close()
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matcher, err := labels.NewMatcher(labels.MatchEqual, model.MetricNameLabel, "a")
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require.NoError(t, err)
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seriesSet := querier.Select(ctx, true, nil, matcher)
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result := make(map[int64]float64)
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var labelsResult labels.Labels
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var iterator chunkenc.Iterator
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for seriesSet.Next() {
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series := seriesSet.At()
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seriesLabels := series.Labels()
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labelsResult = seriesLabels
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iterator := series.Iterator(iterator)
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for iterator.Next() == chunkenc.ValFloat {
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timestamp, value := iterator.At()
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result[timestamp] = value
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}
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}
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require.Equal(t, labelsResult, outputLabel)
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require.Len(t, result, inputTotalSize)
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})
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t.Run("chunk querier", func(t *testing.T) {
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querier, err := fanoutStorage.ChunkQuerier(0, 8000)
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require.NoError(t, err)
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defer querier.Close()
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matcher, err := labels.NewMatcher(labels.MatchEqual, model.MetricNameLabel, "a")
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require.NoError(t, err)
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seriesSet := storage.NewSeriesSetFromChunkSeriesSet(querier.Select(ctx, true, nil, matcher))
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result := make(map[int64]float64)
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var labelsResult labels.Labels
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var iterator chunkenc.Iterator
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for seriesSet.Next() {
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series := seriesSet.At()
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seriesLabels := series.Labels()
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labelsResult = seriesLabels
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iterator := series.Iterator(iterator)
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for iterator.Next() == chunkenc.ValFloat {
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timestamp, value := iterator.At()
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result[timestamp] = value
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}
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}
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require.NoError(t, seriesSet.Err())
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require.Equal(t, labelsResult, outputLabel)
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require.Len(t, result, inputTotalSize)
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})
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}
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func TestFanoutErrors(t *testing.T) {
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workingStorage := teststorage.New(t)
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defer workingStorage.Close()
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cases := []struct {
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primary storage.Storage
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secondary storage.Storage
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warning error
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err error
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}{
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{
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primary: workingStorage,
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secondary: errStorage{},
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warning: errSelect,
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err: nil,
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},
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{
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primary: errStorage{},
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secondary: workingStorage,
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warning: nil,
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err: errSelect,
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},
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}
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for _, tc := range cases {
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fanoutStorage := storage.NewFanout(nil, tc.primary, tc.secondary)
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t.Run("samples", func(t *testing.T) {
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querier, err := fanoutStorage.Querier(0, 8000)
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require.NoError(t, err)
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defer querier.Close()
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matcher := labels.MustNewMatcher(labels.MatchEqual, "a", "b")
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ss := querier.Select(context.Background(), true, nil, matcher)
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// Exhaust.
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for ss.Next() {
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ss.At()
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}
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if tc.err != nil {
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require.Error(t, ss.Err())
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require.Equal(t, tc.err.Error(), ss.Err().Error())
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}
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if tc.warning != nil {
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require.NotEmpty(t, ss.Warnings(), "warnings expected")
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w := ss.Warnings()
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require.Error(t, w.AsErrors()[0])
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warn, _ := w.AsStrings("", 0, 0)
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require.Equal(t, tc.warning.Error(), warn[0])
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}
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})
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t.Run("chunks", func(t *testing.T) {
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t.Skip("enable once TestStorage and TSDB implements ChunkQuerier")
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querier, err := fanoutStorage.ChunkQuerier(0, 8000)
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require.NoError(t, err)
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defer querier.Close()
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matcher := labels.MustNewMatcher(labels.MatchEqual, "a", "b")
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ss := querier.Select(context.Background(), true, nil, matcher)
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// Exhaust.
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for ss.Next() {
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ss.At()
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}
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if tc.err != nil {
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require.Error(t, ss.Err())
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require.Equal(t, tc.err.Error(), ss.Err().Error())
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}
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if tc.warning != nil {
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require.NotEmpty(t, ss.Warnings(), "warnings expected")
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w := ss.Warnings()
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require.Error(t, w.AsErrors()[0])
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warn, _ := w.AsStrings("", 0, 0)
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require.Equal(t, tc.warning.Error(), warn[0])
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}
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})
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}
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}
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var errSelect = errors.New("select error")
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type errStorage struct{}
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type errQuerier struct{}
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func (errStorage) Querier(_, _ int64) (storage.Querier, error) {
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return errQuerier{}, nil
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}
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type errChunkQuerier struct{ errQuerier }
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func (errStorage) ChunkQuerier(_, _ int64) (storage.ChunkQuerier, error) {
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return errChunkQuerier{}, nil
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}
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func (errStorage) Appender(_ context.Context) storage.Appender { return nil }
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func (errStorage) StartTime() (int64, error) { return 0, nil }
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func (errStorage) Close() error { return nil }
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func (errQuerier) Select(context.Context, bool, *storage.SelectHints, ...*labels.Matcher) storage.SeriesSet {
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return storage.ErrSeriesSet(errSelect)
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}
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func (errQuerier) LabelValues(context.Context, string, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
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return nil, nil, errors.New("label values error")
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}
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func (errQuerier) LabelNames(context.Context, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
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return nil, nil, errors.New("label names error")
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}
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func (errQuerier) Close() error { return nil }
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func (errChunkQuerier) Select(context.Context, bool, *storage.SelectHints, ...*labels.Matcher) storage.ChunkSeriesSet {
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return storage.ErrChunkSeriesSet(errSelect)
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}
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