mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-25 05:34:05 -08:00
383 lines
11 KiB
Go
383 lines
11 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 tsdb
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import (
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"reflect"
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"strconv"
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/pkg/exemplar"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/storage"
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)
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// Tests the same exemplar cases as AddExemplar, but specifically the ValidateExemplar function so it can be relied on externally.
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func TestValidateExemplar(t *testing.T) {
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exs, err := NewCircularExemplarStorage(2, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l := labels.Labels{
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{Name: "service", Value: "asdf"},
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}
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e := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "qwerty",
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},
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},
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Value: 0.1,
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Ts: 1,
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}
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require.NoError(t, es.ValidateExemplar(l, e))
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require.NoError(t, es.AddExemplar(l, e))
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e2 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "zxcvb",
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},
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},
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Value: 0.1,
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Ts: 2,
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}
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require.NoError(t, es.ValidateExemplar(l, e2))
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require.NoError(t, es.AddExemplar(l, e2))
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require.Equal(t, es.ValidateExemplar(l, e2), storage.ErrDuplicateExemplar, "error is expected attempting to validate duplicate exemplar")
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e3 := e2
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e3.Ts = 3
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require.Equal(t, es.ValidateExemplar(l, e3), storage.ErrDuplicateExemplar, "error is expected when attempting to add duplicate exemplar, even with different timestamp")
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e3.Ts = 1
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e3.Value = 0.3
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require.Equal(t, es.ValidateExemplar(l, e3), storage.ErrOutOfOrderExemplar)
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e4 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "a",
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Value: strings.Repeat("b", exemplar.ExemplarMaxLabelSetLength),
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},
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},
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Value: 0.1,
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Ts: 2,
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}
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require.Equal(t, storage.ErrExemplarLabelLength, es.ValidateExemplar(l, e4))
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}
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func TestAddExemplar(t *testing.T) {
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exs, err := NewCircularExemplarStorage(2, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l := labels.Labels{
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{Name: "service", Value: "asdf"},
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}
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e := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "qwerty",
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},
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},
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Value: 0.1,
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Ts: 1,
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}
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require.NoError(t, es.AddExemplar(l, e))
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require.Equal(t, es.index[l.String()].newest, 0, "exemplar was not stored correctly")
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e2 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "zxcvb",
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},
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},
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Value: 0.1,
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Ts: 2,
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}
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require.NoError(t, es.AddExemplar(l, e2))
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require.Equal(t, es.index[l.String()].newest, 1, "exemplar was not stored correctly, location of newest exemplar for series in index did not update")
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require.True(t, es.exemplars[es.index[l.String()].newest].exemplar.Equals(e2), "exemplar was not stored correctly, expected %+v got: %+v", e2, es.exemplars[es.index[l.String()].newest].exemplar)
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require.NoError(t, es.AddExemplar(l, e2), "no error is expected attempting to add duplicate exemplar")
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e3 := e2
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e3.Ts = 3
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require.NoError(t, es.AddExemplar(l, e3), "no error is expected when attempting to add duplicate exemplar, even with different timestamp")
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e3.Ts = 1
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e3.Value = 0.3
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require.Equal(t, storage.ErrOutOfOrderExemplar, es.AddExemplar(l, e3))
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e4 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "a",
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Value: strings.Repeat("b", exemplar.ExemplarMaxLabelSetLength),
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},
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},
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Value: 0.1,
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Ts: 2,
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}
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require.Equal(t, storage.ErrExemplarLabelLength, es.AddExemplar(l, e4))
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}
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func TestStorageOverflow(t *testing.T) {
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// Test that circular buffer index and assignment
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// works properly, adding more exemplars than can
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// be stored and then querying for them.
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exs, err := NewCircularExemplarStorage(5, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l := labels.Labels{
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{Name: "service", Value: "asdf"},
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}
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var eList []exemplar.Exemplar
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for i := 0; i < len(es.exemplars)+1; i++ {
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e := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "a",
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},
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},
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Value: float64(i+1) / 10,
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Ts: int64(101 + i),
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}
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es.AddExemplar(l, e)
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eList = append(eList, e)
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}
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require.True(t, (es.exemplars[0].exemplar.Ts == 106), "exemplar was not stored correctly")
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m, err := labels.NewMatcher(labels.MatchEqual, l[0].Name, l[0].Value)
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require.NoError(t, err, "error creating label matcher for exemplar query")
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ret, err := es.Select(100, 110, []*labels.Matcher{m})
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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require.True(t, reflect.DeepEqual(eList[1:], ret[0].Exemplars), "select did not return expected exemplars\n\texpected: %+v\n\tactual: %+v\n", eList[1:], ret[0].Exemplars)
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}
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func TestSelectExemplar(t *testing.T) {
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exs, err := NewCircularExemplarStorage(5, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l := labels.Labels{{Name: "service", Value: "asdf"}}
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e := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "qwerty",
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},
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},
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Value: 0.1,
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Ts: 12,
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}
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err = es.AddExemplar(l, e)
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require.NoError(t, err, "adding exemplar failed")
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require.True(t, reflect.DeepEqual(es.exemplars[0].exemplar, e), "exemplar was not stored correctly")
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m, err := labels.NewMatcher(labels.MatchEqual, l[0].Name, l[0].Value)
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require.NoError(t, err, "error creating label matcher for exemplar query")
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ret, err := es.Select(0, 100, []*labels.Matcher{m})
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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expectedResult := []exemplar.Exemplar{e}
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require.True(t, reflect.DeepEqual(expectedResult, ret[0].Exemplars), "select did not return expected exemplars\n\texpected: %+v\n\tactual: %+v\n", expectedResult, ret[0].Exemplars)
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}
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func TestSelectExemplar_MultiSeries(t *testing.T) {
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exs, err := NewCircularExemplarStorage(5, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l1 := labels.Labels{
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{Name: "__name__", Value: "test_metric"},
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{Name: "service", Value: "asdf"},
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}
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l2 := labels.Labels{
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{Name: "__name__", Value: "test_metric2"},
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{Name: "service", Value: "qwer"},
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}
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for i := 0; i < len(es.exemplars); i++ {
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e1 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "a",
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},
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},
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Value: float64(i+1) / 10,
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Ts: int64(101 + i),
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}
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err = es.AddExemplar(l1, e1)
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require.NoError(t, err)
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e2 := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "b",
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},
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},
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Value: float64(i+1) / 10,
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Ts: int64(101 + i),
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}
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err = es.AddExemplar(l2, e2)
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require.NoError(t, err)
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}
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m, err := labels.NewMatcher(labels.MatchEqual, l2[0].Name, l2[0].Value)
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require.NoError(t, err, "error creating label matcher for exemplar query")
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ret, err := es.Select(100, 200, []*labels.Matcher{m})
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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require.True(t, len(ret[0].Exemplars) == 3, "didn't get expected 8 exemplars, got %d", len(ret[0].Exemplars))
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m, err = labels.NewMatcher(labels.MatchEqual, l1[0].Name, l1[0].Value)
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require.NoError(t, err, "error creating label matcher for exemplar query")
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ret, err = es.Select(100, 200, []*labels.Matcher{m})
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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require.True(t, len(ret[0].Exemplars) == 2, "didn't get expected 8 exemplars, got %d", len(ret[0].Exemplars))
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}
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func TestSelectExemplar_TimeRange(t *testing.T) {
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lenEs := 5
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exs, err := NewCircularExemplarStorage(lenEs, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l := labels.Labels{
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{Name: "service", Value: "asdf"},
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}
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for i := 0; i < lenEs; i++ {
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err := es.AddExemplar(l, exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: strconv.Itoa(i),
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},
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},
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Value: 0.1,
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Ts: int64(101 + i),
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})
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require.NoError(t, err)
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require.Equal(t, es.index[l.String()].newest, i, "exemplar was not stored correctly")
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}
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m, err := labels.NewMatcher(labels.MatchEqual, l[0].Name, l[0].Value)
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require.NoError(t, err, "error creating label matcher for exemplar query")
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ret, err := es.Select(102, 104, []*labels.Matcher{m})
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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require.True(t, len(ret[0].Exemplars) == 3, "didn't get expected two exemplars %d, %+v", len(ret[0].Exemplars), ret)
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}
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// Test to ensure that even though a series matches more than one matcher from the
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// query that it's exemplars are only included in the result a single time.
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func TestSelectExemplar_DuplicateSeries(t *testing.T) {
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exs, err := NewCircularExemplarStorage(4, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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e := exemplar.Exemplar{
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Labels: labels.Labels{
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labels.Label{
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Name: "traceID",
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Value: "qwerty",
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},
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},
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Value: 0.1,
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Ts: 12,
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}
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l := labels.Labels{
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{Name: "service", Value: "asdf"},
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{Name: "cluster", Value: "us-central1"},
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}
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// Lets just assume somehow the PromQL expression generated two separate lists of matchers,
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// both of which can select this particular series.
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m := [][]*labels.Matcher{
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{
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labels.MustNewMatcher(labels.MatchEqual, l[0].Name, l[0].Value),
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},
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{
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labels.MustNewMatcher(labels.MatchEqual, l[1].Name, l[1].Value),
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},
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}
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err = es.AddExemplar(l, e)
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require.NoError(t, err, "adding exemplar failed")
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require.True(t, reflect.DeepEqual(es.exemplars[0].exemplar, e), "exemplar was not stored correctly")
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ret, err := es.Select(0, 100, m...)
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require.NoError(t, err)
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require.True(t, len(ret) == 1, "select should have returned samples for a single series only")
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}
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func TestIndexOverwrite(t *testing.T) {
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exs, err := NewCircularExemplarStorage(2, nil)
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require.NoError(t, err)
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es := exs.(*CircularExemplarStorage)
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l1 := labels.Labels{
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{Name: "service", Value: "asdf"},
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}
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l2 := labels.Labels{
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{Name: "service", Value: "qwer"},
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}
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err = es.AddExemplar(l1, exemplar.Exemplar{Value: 1, Ts: 1})
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require.NoError(t, err)
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err = es.AddExemplar(l2, exemplar.Exemplar{Value: 2, Ts: 2})
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require.NoError(t, err)
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err = es.AddExemplar(l2, exemplar.Exemplar{Value: 3, Ts: 3})
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require.NoError(t, err)
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// Ensure index GC'ing is taking place, there should no longer be any
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// index entry for series l1 since we just wrote two exemplars for series l2.
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_, ok := es.index[l1.String()]
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require.False(t, ok)
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require.Equal(t, &indexEntry{1, 0, l2}, es.index[l2.String()])
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err = es.AddExemplar(l1, exemplar.Exemplar{Value: 4, Ts: 4})
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require.NoError(t, err)
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i := es.index[l2.String()]
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require.Equal(t, &indexEntry{0, 0, l2}, i)
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}
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