662 lines
17 KiB
Go
662 lines
17 KiB
Go
// Copyright 2016 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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"errors"
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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/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/storage"
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"github.com/prometheus/prometheus/util/teststorage"
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)
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func TestAlertingRuleState(t *testing.T) {
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tests := []struct {
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name string
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active map[uint64]*Alert
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want AlertState
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}{
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{
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name: "MaxStateFiring",
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active: map[uint64]*Alert{
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0: {State: StatePending},
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1: {State: StateFiring},
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},
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want: StateFiring,
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},
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{
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name: "MaxStatePending",
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active: map[uint64]*Alert{
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0: {State: StateInactive},
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1: {State: StatePending},
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},
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want: StatePending,
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},
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{
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name: "MaxStateInactive",
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active: map[uint64]*Alert{
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0: {State: StateInactive},
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1: {State: StateInactive},
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},
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want: StateInactive,
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},
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}
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for i, test := range tests {
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rule := NewAlertingRule(test.name, nil, 0, nil, nil, nil, "", true, nil)
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rule.active = test.active
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got := rule.State()
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require.Equal(t, test.want, got, "test case %d unexpected AlertState, want:%d got:%d", i, test.want, got)
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}
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}
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func TestAlertingRuleLabelsUpdate(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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http_requests{job="app-server", instance="0"} 75 85 70 70
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`)
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require.NoError(t, err)
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defer suite.Close()
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require.NoError(t, suite.Run())
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expr, err := parser.ParseExpr(`http_requests < 100`)
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require.NoError(t, err)
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rule := NewAlertingRule(
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"HTTPRequestRateLow",
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expr,
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time.Minute,
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// Basing alerting rule labels off of a value that can change is a very bad idea.
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// If an alert is going back and forth between two label values it will never fire.
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// Instead, you should write two alerts with constant labels.
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labels.FromStrings("severity", "{{ if lt $value 80.0 }}critical{{ else }}warning{{ end }}"),
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nil, nil, "", true, nil,
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)
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results := []promql.Vector{
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{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "HTTPRequestRateLow",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"severity", "critical",
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),
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Point: promql.Point{V: 1},
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},
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},
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{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "HTTPRequestRateLow",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"severity", "warning",
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),
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Point: promql.Point{V: 1},
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},
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},
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{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "HTTPRequestRateLow",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"severity", "critical",
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),
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Point: promql.Point{V: 1},
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},
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},
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{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "HTTPRequestRateLow",
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"alertstate", "firing",
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"instance", "0",
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"job", "app-server",
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"severity", "critical",
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),
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Point: promql.Point{V: 1},
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},
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},
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}
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baseTime := time.Unix(0, 0)
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for i, result := range results {
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t.Logf("case %d", i)
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evalTime := baseTime.Add(time.Duration(i) * time.Minute)
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result[0].Point.T = timestamp.FromTime(evalTime)
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res, err := rule.Eval(suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0)
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require.NoError(t, err)
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var filteredRes promql.Vector // After removing 'ALERTS_FOR_STATE' samples.
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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require.Equal(t, result, filteredRes)
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}
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}
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func TestAlertingRuleExternalLabelsInTemplate(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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http_requests{job="app-server", instance="0"} 75 85 70 70
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`)
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require.NoError(t, err)
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defer suite.Close()
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require.NoError(t, suite.Run())
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expr, err := parser.ParseExpr(`http_requests < 100`)
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require.NoError(t, err)
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ruleWithoutExternalLabels := NewAlertingRule(
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"ExternalLabelDoesNotExist",
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expr,
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time.Minute,
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labels.FromStrings("templated_label", "There are {{ len $externalLabels }} external Labels, of which foo is {{ $externalLabels.foo }}."),
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nil,
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nil,
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"",
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true, log.NewNopLogger(),
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)
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ruleWithExternalLabels := NewAlertingRule(
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"ExternalLabelExists",
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expr,
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time.Minute,
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labels.FromStrings("templated_label", "There are {{ len $externalLabels }} external Labels, of which foo is {{ $externalLabels.foo }}."),
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nil,
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labels.FromStrings("foo", "bar", "dings", "bums"),
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"",
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true, log.NewNopLogger(),
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)
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result := promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "ExternalLabelDoesNotExist",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"templated_label", "There are 0 external Labels, of which foo is .",
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),
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Point: promql.Point{V: 1},
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},
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "ExternalLabelExists",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"templated_label", "There are 2 external Labels, of which foo is bar.",
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),
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Point: promql.Point{V: 1},
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},
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}
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evalTime := time.Unix(0, 0)
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result[0].Point.T = timestamp.FromTime(evalTime)
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result[1].Point.T = timestamp.FromTime(evalTime)
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var filteredRes promql.Vector // After removing 'ALERTS_FOR_STATE' samples.
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res, err := ruleWithoutExternalLabels.Eval(
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suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0,
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)
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require.NoError(t, err)
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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res, err = ruleWithExternalLabels.Eval(
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suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0,
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)
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require.NoError(t, err)
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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require.Equal(t, result, filteredRes)
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}
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func TestAlertingRuleExternalURLInTemplate(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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http_requests{job="app-server", instance="0"} 75 85 70 70
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`)
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require.NoError(t, err)
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defer suite.Close()
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require.NoError(t, suite.Run())
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expr, err := parser.ParseExpr(`http_requests < 100`)
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require.NoError(t, err)
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ruleWithoutExternalURL := NewAlertingRule(
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"ExternalURLDoesNotExist",
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expr,
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time.Minute,
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labels.FromStrings("templated_label", "The external URL is {{ $externalURL }}."),
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nil,
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nil,
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"",
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true, log.NewNopLogger(),
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)
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ruleWithExternalURL := NewAlertingRule(
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"ExternalURLExists",
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expr,
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time.Minute,
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labels.FromStrings("templated_label", "The external URL is {{ $externalURL }}."),
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nil,
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nil,
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"http://localhost:1234",
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true, log.NewNopLogger(),
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)
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result := promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "ExternalURLDoesNotExist",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"templated_label", "The external URL is .",
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),
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Point: promql.Point{V: 1},
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},
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "ExternalURLExists",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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"templated_label", "The external URL is http://localhost:1234.",
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),
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Point: promql.Point{V: 1},
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},
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}
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evalTime := time.Unix(0, 0)
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result[0].Point.T = timestamp.FromTime(evalTime)
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result[1].Point.T = timestamp.FromTime(evalTime)
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var filteredRes promql.Vector // After removing 'ALERTS_FOR_STATE' samples.
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res, err := ruleWithoutExternalURL.Eval(
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suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0,
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)
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require.NoError(t, err)
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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res, err = ruleWithExternalURL.Eval(
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suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0,
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)
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require.NoError(t, err)
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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require.Equal(t, result, filteredRes)
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}
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func TestAlertingRuleEmptyLabelFromTemplate(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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http_requests{job="app-server", instance="0"} 75 85 70 70
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`)
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require.NoError(t, err)
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defer suite.Close()
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require.NoError(t, suite.Run())
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expr, err := parser.ParseExpr(`http_requests < 100`)
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require.NoError(t, err)
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rule := NewAlertingRule(
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"EmptyLabel",
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expr,
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time.Minute,
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labels.FromStrings("empty_label", ""),
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nil,
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nil,
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"",
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true, log.NewNopLogger(),
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)
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result := promql.Vector{
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promql.Sample{
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Metric: labels.FromStrings(
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"__name__", "ALERTS",
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"alertname", "EmptyLabel",
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"alertstate", "pending",
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"instance", "0",
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"job", "app-server",
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),
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Point: promql.Point{V: 1},
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},
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}
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evalTime := time.Unix(0, 0)
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result[0].Point.T = timestamp.FromTime(evalTime)
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var filteredRes promql.Vector // After removing 'ALERTS_FOR_STATE' samples.
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res, err := rule.Eval(
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suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0,
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)
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require.NoError(t, err)
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for _, smpl := range res {
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smplName := smpl.Metric.Get("__name__")
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if smplName == "ALERTS" {
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filteredRes = append(filteredRes, smpl)
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} else {
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// If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'.
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require.Equal(t, "ALERTS_FOR_STATE", smplName)
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}
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}
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require.Equal(t, result, filteredRes)
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}
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func TestAlertingRuleQueryInTemplate(t *testing.T) {
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suite, err := promql.NewTest(t, `
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load 1m
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http_requests{job="app-server", instance="0"} 70 85 70 70
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`)
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require.NoError(t, err)
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defer suite.Close()
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require.NoError(t, suite.Run())
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expr, err := parser.ParseExpr(`sum(http_requests) < 100`)
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require.NoError(t, err)
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ruleWithQueryInTemplate := NewAlertingRule(
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"ruleWithQueryInTemplate",
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expr,
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time.Minute,
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labels.FromStrings("label", "value"),
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labels.FromStrings("templated_label", `{{- with "sort(sum(http_requests) by (instance))" | query -}}
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{{- range $i,$v := . -}}
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instance: {{ $v.Labels.instance }}, value: {{ printf "%.0f" $v.Value }};
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{{- end -}}
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{{- end -}}
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`),
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nil,
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"",
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true, log.NewNopLogger(),
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)
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evalTime := time.Unix(0, 0)
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startQueryCh := make(chan struct{})
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getDoneCh := make(chan struct{})
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slowQueryFunc := func(ctx context.Context, q string, ts time.Time) (promql.Vector, error) {
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if q == "sort(sum(http_requests) by (instance))" {
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// This is a minimum reproduction of issue 10703, expand template with query.
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close(startQueryCh)
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select {
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case <-getDoneCh:
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case <-time.After(time.Millisecond * 10):
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// Assert no blocking when template expanding.
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require.Fail(t, "unexpected blocking when template expanding.")
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}
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}
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return EngineQueryFunc(suite.QueryEngine(), suite.Storage())(ctx, q, ts)
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}
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go func() {
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<-startQueryCh
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_ = ruleWithQueryInTemplate.Health()
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_ = ruleWithQueryInTemplate.LastError()
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_ = ruleWithQueryInTemplate.GetEvaluationDuration()
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_ = ruleWithQueryInTemplate.GetEvaluationTimestamp()
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close(getDoneCh)
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}()
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_, err = ruleWithQueryInTemplate.Eval(
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suite.Context(), evalTime, slowQueryFunc, nil, 0,
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)
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require.NoError(t, err)
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}
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func BenchmarkAlertingRuleAtomicField(b *testing.B) {
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b.ReportAllocs()
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rule := NewAlertingRule("bench", nil, 0, nil, nil, nil, "", true, nil)
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done := make(chan struct{})
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go func() {
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for i := 0; i < b.N; i++ {
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rule.GetEvaluationTimestamp()
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}
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close(done)
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}()
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b.RunParallel(func(pb *testing.PB) {
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for pb.Next() {
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rule.SetEvaluationTimestamp(time.Now())
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}
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})
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<-done
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}
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func TestAlertingRuleDuplicate(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 := NewAlertingRule(
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"foo",
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expr,
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time.Minute,
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labels.FromStrings("test", "test"),
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nil,
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nil,
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"",
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true, log.NewNopLogger(),
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)
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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 alert labels")
|
|
}
|
|
|
|
func TestAlertingRuleLimit(t *testing.T) {
|
|
suite, err := promql.NewTest(t, `
|
|
load 1m
|
|
metric{label="1"} 1
|
|
metric{label="2"} 1
|
|
`)
|
|
require.NoError(t, err)
|
|
defer suite.Close()
|
|
|
|
require.NoError(t, suite.Run())
|
|
|
|
tests := []struct {
|
|
limit int
|
|
err string
|
|
}{
|
|
{
|
|
limit: 0,
|
|
},
|
|
{
|
|
limit: -1,
|
|
},
|
|
{
|
|
limit: 2,
|
|
},
|
|
{
|
|
limit: 1,
|
|
err: "exceeded limit of 1 with 2 alerts",
|
|
},
|
|
}
|
|
|
|
expr, _ := parser.ParseExpr(`metric > 0`)
|
|
rule := NewAlertingRule(
|
|
"foo",
|
|
expr,
|
|
time.Minute,
|
|
labels.FromStrings("test", "test"),
|
|
nil,
|
|
nil,
|
|
"",
|
|
true, log.NewNopLogger(),
|
|
)
|
|
|
|
evalTime := time.Unix(0, 0)
|
|
|
|
for _, test := range tests {
|
|
_, err := rule.Eval(suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, test.limit)
|
|
if err != nil {
|
|
require.EqualError(t, err, test.err)
|
|
} else if test.err != "" {
|
|
t.Errorf("Expected errror %s, got none", test.err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestQueryForStateSeries(t *testing.T) {
|
|
testError := errors.New("test error")
|
|
|
|
type testInput struct {
|
|
selectMockFunction func(sortSeries bool, hints *storage.SelectHints, matchers ...*labels.Matcher) storage.SeriesSet
|
|
expectedSeries storage.Series
|
|
expectedError error
|
|
}
|
|
|
|
tests := []testInput{
|
|
// Test for empty series.
|
|
{
|
|
selectMockFunction: func(sortSeries bool, hints *storage.SelectHints, matchers ...*labels.Matcher) storage.SeriesSet {
|
|
return storage.EmptySeriesSet()
|
|
},
|
|
expectedSeries: nil,
|
|
expectedError: nil,
|
|
},
|
|
// Test for error series.
|
|
{
|
|
selectMockFunction: func(sortSeries bool, hints *storage.SelectHints, matchers ...*labels.Matcher) storage.SeriesSet {
|
|
return storage.ErrSeriesSet(testError)
|
|
},
|
|
expectedSeries: nil,
|
|
expectedError: testError,
|
|
},
|
|
// Test for mock series.
|
|
{
|
|
selectMockFunction: func(sortSeries bool, hints *storage.SelectHints, matchers ...*labels.Matcher) storage.SeriesSet {
|
|
return storage.TestSeriesSet(storage.MockSeries(
|
|
[]int64{1, 2, 3},
|
|
[]float64{1, 2, 3},
|
|
[]string{"__name__", "ALERTS_FOR_STATE", "alertname", "TestRule", "severity", "critical"},
|
|
))
|
|
},
|
|
expectedSeries: storage.MockSeries(
|
|
[]int64{1, 2, 3},
|
|
[]float64{1, 2, 3},
|
|
[]string{"__name__", "ALERTS_FOR_STATE", "alertname", "TestRule", "severity", "critical"},
|
|
),
|
|
expectedError: nil,
|
|
},
|
|
}
|
|
|
|
testFunc := func(tst testInput) {
|
|
querier := &storage.MockQuerier{
|
|
SelectMockFunction: tst.selectMockFunction,
|
|
}
|
|
|
|
rule := NewAlertingRule(
|
|
"TestRule",
|
|
nil,
|
|
time.Minute,
|
|
labels.FromStrings("severity", "critical"),
|
|
nil, nil, "", true, nil,
|
|
)
|
|
|
|
alert := &Alert{
|
|
State: 0,
|
|
Labels: nil,
|
|
Annotations: nil,
|
|
Value: 0,
|
|
ActiveAt: time.Time{},
|
|
FiredAt: time.Time{},
|
|
ResolvedAt: time.Time{},
|
|
LastSentAt: time.Time{},
|
|
ValidUntil: time.Time{},
|
|
}
|
|
|
|
series, err := rule.QueryforStateSeries(alert, querier)
|
|
|
|
require.Equal(t, tst.expectedSeries, series)
|
|
require.Equal(t, tst.expectedError, err)
|
|
}
|
|
|
|
for _, tst := range tests {
|
|
testFunc(tst)
|
|
}
|
|
}
|