mirror of
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252 lines
6.9 KiB
Go
252 lines
6.9 KiB
Go
// Copyright 2013 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 rules
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import (
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"context"
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"testing"
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"time"
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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/model/timestamp"
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"github.com/prometheus/prometheus/promql"
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"github.com/prometheus/prometheus/promql/parser"
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"github.com/prometheus/prometheus/util/teststorage"
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)
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var (
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ruleEvaluationTime = time.Unix(0, 0).UTC()
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exprWithMetricName, _ = parser.ParseExpr(`sort(metric)`)
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exprWithoutMetricName, _ = parser.ParseExpr(`sort(metric + metric)`)
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)
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var ruleEvalTestScenarios = []struct {
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name string
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ruleLabels labels.Labels
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expr parser.Expr
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expected promql.Vector
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}{
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{
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name: "no labels in recording rule, metric name in query result",
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ruleLabels: labels.EmptyLabels(),
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expr: exprWithMetricName,
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expected: promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "1", "label_b", "3"),
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F: 1,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "2", "label_b", "4"),
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F: 10,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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},
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},
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{
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name: "only new labels in recording rule, metric name in query result",
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ruleLabels: labels.FromStrings("extra_from_rule", "foo"),
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expr: exprWithMetricName,
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expected: promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "1", "label_b", "3", "extra_from_rule", "foo"),
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F: 1,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "2", "label_b", "4", "extra_from_rule", "foo"),
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F: 10,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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},
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},
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{
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name: "some replacement labels in recording rule, metric name in query result",
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ruleLabels: labels.FromStrings("label_a", "from_rule"),
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expr: exprWithMetricName,
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expected: promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "from_rule", "label_b", "3"),
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F: 1,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "from_rule", "label_b", "4"),
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F: 10,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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},
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},
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{
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name: "no labels in recording rule, no metric name in query result",
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ruleLabels: labels.EmptyLabels(),
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expr: exprWithoutMetricName,
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expected: promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "1", "label_b", "3"),
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F: 2,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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promql.Sample{
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Metric: labels.FromStrings("__name__", "test_rule", "label_a", "2", "label_b", "4"),
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F: 20,
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T: timestamp.FromTime(ruleEvaluationTime),
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},
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},
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},
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}
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func setUpRuleEvalTest(t require.TestingT) *teststorage.TestStorage {
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return promql.LoadedStorage(t, `
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load 1m
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metric{label_a="1",label_b="3"} 1
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metric{label_a="2",label_b="4"} 10
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`)
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}
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func TestRuleEval(t *testing.T) {
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storage := setUpRuleEvalTest(t)
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t.Cleanup(func() { storage.Close() })
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for _, scenario := range ruleEvalTestScenarios {
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t.Run(scenario.name, func(t *testing.T) {
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rule := NewRecordingRule("test_rule", scenario.expr, scenario.ruleLabels)
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result, err := rule.Eval(context.TODO(), ruleEvaluationTime, EngineQueryFunc(testEngine, storage), nil, 0)
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require.NoError(t, err)
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require.Equal(t, scenario.expected, result)
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})
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}
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}
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func BenchmarkRuleEval(b *testing.B) {
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storage := setUpRuleEvalTest(b)
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b.Cleanup(func() { storage.Close() })
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for _, scenario := range ruleEvalTestScenarios {
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b.Run(scenario.name, func(b *testing.B) {
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rule := NewRecordingRule("test_rule", scenario.expr, scenario.ruleLabels)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := rule.Eval(context.TODO(), ruleEvaluationTime, EngineQueryFunc(testEngine, storage), nil, 0)
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if err != nil {
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require.NoError(b, err)
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}
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}
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})
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}
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}
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// TestRuleEvalDuplicate tests for duplicate labels in recorded metrics, see #5529.
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func TestRuleEvalDuplicate(t *testing.T) {
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storage := teststorage.New(t)
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defer storage.Close()
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opts := promql.EngineOpts{
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Logger: nil,
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Reg: nil,
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MaxSamples: 10,
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Timeout: 10 * time.Second,
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}
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engine := promql.NewEngine(opts)
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ctx, cancelCtx := context.WithCancel(context.Background())
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defer cancelCtx()
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now := time.Now()
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expr, _ := parser.ParseExpr(`vector(0) or label_replace(vector(0),"test","x","","")`)
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rule := NewRecordingRule("foo", expr, labels.FromStrings("test", "test"))
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_, err := rule.Eval(ctx, now, EngineQueryFunc(engine, storage), nil, 0)
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require.Error(t, err)
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require.EqualError(t, err, "vector contains metrics with the same labelset after applying rule labels")
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}
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func TestRecordingRuleLimit(t *testing.T) {
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storage := promql.LoadedStorage(t, `
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load 1m
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metric{label="1"} 1
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metric{label="2"} 1
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`)
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t.Cleanup(func() { storage.Close() })
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tests := []struct {
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limit int
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err string
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}{
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{
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limit: 0,
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},
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{
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limit: -1,
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},
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{
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limit: 2,
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},
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{
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limit: 1,
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err: "exceeded limit of 1 with 2 series",
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},
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}
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expr, _ := parser.ParseExpr(`metric > 0`)
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rule := NewRecordingRule(
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"foo",
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expr,
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labels.FromStrings("test", "test"),
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)
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evalTime := time.Unix(0, 0)
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for _, test := range tests {
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switch _, err := rule.Eval(context.TODO(), evalTime, EngineQueryFunc(testEngine, storage), nil, test.limit); {
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case err != nil:
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require.EqualError(t, err, test.err)
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case test.err != "":
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t.Errorf("Expected error %s, got none", test.err)
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}
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}
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}
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// TestRecordingEvalWithOrigin checks that the recording rule details are passed through the context.
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func TestRecordingEvalWithOrigin(t *testing.T) {
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ctx := context.Background()
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now := time.Now()
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const (
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name = "my-recording-rule"
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query = `count(metric{foo="bar"})`
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)
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var (
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detail RuleDetail
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lbs = labels.FromStrings("foo", "bar")
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)
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expr, err := parser.ParseExpr(query)
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require.NoError(t, err)
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rule := NewRecordingRule(name, expr, lbs)
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_, err = rule.Eval(ctx, now, func(ctx context.Context, qs string, _ time.Time) (promql.Vector, error) {
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detail = FromOriginContext(ctx)
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return nil, nil
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}, nil, 0)
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require.NoError(t, err)
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require.Equal(t, detail, NewRuleDetail(rule))
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}
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