mirror of
https://github.com/prometheus/prometheus.git
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7098c56474
For special remote read endpoints which have only data for specific queries, it is desired to limit the number of queries sent to the configured remote read endpoint to reduce latency and performance overhead.
321 lines
9.1 KiB
Go
321 lines
9.1 KiB
Go
// Copyright 2017 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 remote
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import (
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"context"
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"reflect"
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"sort"
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"testing"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/prompb"
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"github.com/prometheus/prometheus/storage"
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)
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func mustNewLabelMatcher(mt labels.MatchType, name, val string) *labels.Matcher {
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m, err := labels.NewMatcher(mt, name, val)
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if err != nil {
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panic(err)
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}
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return m
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}
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func TestExternalLabelsQuerierSelect(t *testing.T) {
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matchers := []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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}
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q := &externalLabelsQuerier{
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Querier: mockQuerier{},
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externalLabels: model.LabelSet{"region": "europe"},
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}
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want := newSeriesSetFilter(mockSeriesSet{}, q.externalLabels)
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if have := q.Select(matchers...); !reflect.DeepEqual(want, have) {
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t.Errorf("expected series set %+v, got %+v", want, have)
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}
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}
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func TestExternalLabelsQuerierAddExternalLabels(t *testing.T) {
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tests := []struct {
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el model.LabelSet
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inMatchers []*labels.Matcher
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outMatchers []*labels.Matcher
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added model.LabelSet
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}{
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{
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el: model.LabelSet{},
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inMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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},
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outMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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},
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added: model.LabelSet{},
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},
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{
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el: model.LabelSet{"region": "europe", "dc": "berlin-01"},
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inMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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},
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outMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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mustNewLabelMatcher(labels.MatchEqual, "region", "europe"),
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mustNewLabelMatcher(labels.MatchEqual, "dc", "berlin-01"),
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},
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added: model.LabelSet{"region": "europe", "dc": "berlin-01"},
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},
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{
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el: model.LabelSet{"region": "europe", "dc": "berlin-01"},
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inMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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mustNewLabelMatcher(labels.MatchEqual, "dc", "munich-02"),
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},
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outMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "job", "api-server"),
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mustNewLabelMatcher(labels.MatchEqual, "region", "europe"),
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mustNewLabelMatcher(labels.MatchEqual, "dc", "munich-02"),
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},
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added: model.LabelSet{"region": "europe"},
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},
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}
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for i, test := range tests {
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q := &externalLabelsQuerier{Querier: mockQuerier{}, externalLabels: test.el}
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matchers, added := q.addExternalLabels(test.inMatchers)
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sort.Slice(test.outMatchers, func(i, j int) bool { return test.outMatchers[i].Name < test.outMatchers[j].Name })
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sort.Slice(matchers, func(i, j int) bool { return matchers[i].Name < matchers[j].Name })
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if !reflect.DeepEqual(matchers, test.outMatchers) {
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t.Fatalf("%d. unexpected matchers; want %v, got %v", i, test.outMatchers, matchers)
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}
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if !reflect.DeepEqual(added, test.added) {
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t.Fatalf("%d. unexpected added labels; want %v, got %v", i, test.added, added)
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}
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}
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}
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func TestSeriesSetFilter(t *testing.T) {
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tests := []struct {
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in *prompb.QueryResult
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toRemove model.LabelSet
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expected *prompb.QueryResult
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}{
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{
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toRemove: model.LabelSet{"foo": "bar"},
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in: &prompb.QueryResult{
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Timeseries: []*prompb.TimeSeries{
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{Labels: labelsToLabelsProto(labels.FromStrings("foo", "bar", "a", "b")), Samples: []*prompb.Sample{}},
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},
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},
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expected: &prompb.QueryResult{
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Timeseries: []*prompb.TimeSeries{
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{Labels: labelsToLabelsProto(labels.FromStrings("a", "b")), Samples: []*prompb.Sample{}},
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},
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},
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},
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}
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for i, tc := range tests {
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filtered := newSeriesSetFilter(FromQueryResult(tc.in), tc.toRemove)
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have, err := ToQueryResult(filtered)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(have, tc.expected) {
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t.Fatalf("%d. unexpected labels; want %v, got %v", i, tc.expected, have)
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}
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}
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}
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type mockQuerier struct {
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ctx context.Context
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mint, maxt int64
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storage.Querier
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}
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type mockSeriesSet struct {
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storage.SeriesSet
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}
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func (mockQuerier) Select(...*labels.Matcher) storage.SeriesSet {
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return mockSeriesSet{}
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}
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func TestPreferLocalStorageFilter(t *testing.T) {
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ctx := context.Background()
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tests := []struct {
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localStartTime int64
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mint int64
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maxt int64
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querier storage.Querier
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}{
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{
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localStartTime: int64(100),
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mint: int64(0),
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maxt: int64(50),
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querier: mockQuerier{ctx: ctx, mint: 0, maxt: 50},
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},
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{
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localStartTime: int64(20),
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mint: int64(0),
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maxt: int64(50),
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querier: mockQuerier{ctx: ctx, mint: 0, maxt: 20},
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},
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{
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localStartTime: int64(20),
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mint: int64(30),
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maxt: int64(50),
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querier: storage.NoopQuerier(),
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},
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}
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for i, test := range tests {
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f := PreferLocalStorageFilter(
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storage.QueryableFunc(func(ctx context.Context, mint, maxt int64) (storage.Querier, error) {
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return mockQuerier{ctx: ctx, mint: mint, maxt: maxt}, nil
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}),
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func() (int64, error) { return test.localStartTime, nil },
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)
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q, err := f.Querier(ctx, test.mint, test.maxt)
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if err != nil {
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t.Fatal(err)
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}
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if test.querier != q {
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t.Errorf("%d. expected quierer %+v, got %+v", i, test.querier, q)
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}
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}
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}
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func TestRequiredMatchersFilter(t *testing.T) {
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ctx := context.Background()
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f := RequiredMatchersFilter(
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storage.QueryableFunc(func(ctx context.Context, mint, maxt int64) (storage.Querier, error) {
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return mockQuerier{ctx: ctx, mint: mint, maxt: maxt}, nil
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}),
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[]*labels.Matcher{mustNewLabelMatcher(labels.MatchEqual, "special", "label")},
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)
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want := &requiredMatchersQuerier{
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Querier: mockQuerier{ctx: ctx, mint: 0, maxt: 50},
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requiredMatchers: []*labels.Matcher{mustNewLabelMatcher(labels.MatchEqual, "special", "label")},
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}
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have, err := f.Querier(ctx, 0, 50)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(want, have) {
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t.Errorf("expected quierer %+v, got %+v", want, have)
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}
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}
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func TestRequiredLabelsQuerierSelect(t *testing.T) {
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tests := []struct {
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requiredMatchers []*labels.Matcher
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matchers []*labels.Matcher
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seriesSet storage.SeriesSet
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}{
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{
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requiredMatchers: []*labels.Matcher{},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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seriesSet: mockSeriesSet{},
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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seriesSet: mockSeriesSet{},
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchRegexp, "special", "label"),
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},
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seriesSet: storage.NoopSeriesSet(),
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "different"),
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},
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seriesSet: storage.NoopSeriesSet(),
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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mustNewLabelMatcher(labels.MatchEqual, "foo", "bar"),
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},
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seriesSet: mockSeriesSet{},
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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mustNewLabelMatcher(labels.MatchEqual, "foo", "bar"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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mustNewLabelMatcher(labels.MatchEqual, "foo", "baz"),
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},
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seriesSet: storage.NoopSeriesSet(),
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},
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{
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requiredMatchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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mustNewLabelMatcher(labels.MatchEqual, "foo", "bar"),
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},
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matchers: []*labels.Matcher{
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mustNewLabelMatcher(labels.MatchEqual, "special", "label"),
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mustNewLabelMatcher(labels.MatchEqual, "foo", "bar"),
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},
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seriesSet: mockSeriesSet{},
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},
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}
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for i, test := range tests {
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q := &requiredMatchersQuerier{
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Querier: mockQuerier{},
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requiredMatchers: test.requiredMatchers,
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}
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if want, have := test.seriesSet, q.Select(test.matchers...); want != have {
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t.Errorf("%d. expected series set %+v, got %+v", i, want, have)
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}
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if want, have := test.requiredMatchers, q.requiredMatchers; !reflect.DeepEqual(want, have) {
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t.Errorf("%d. requiredMatchersQuerier.Select() has modified the matchers", i)
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}
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}
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}
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