479 lines
13 KiB
Go
479 lines
13 KiB
Go
// Copyright 2016 Prometheus Team
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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 inhibit
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import (
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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/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/model"
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"github.com/prometheus/alertmanager/config"
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"github.com/prometheus/alertmanager/pkg/labels"
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"github.com/prometheus/alertmanager/provider"
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"github.com/prometheus/alertmanager/store"
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"github.com/prometheus/alertmanager/types"
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)
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var nopLogger = log.NewNopLogger()
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func TestInhibitRuleHasEqual(t *testing.T) {
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t.Parallel()
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now := time.Now()
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cases := []struct {
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initial map[model.Fingerprint]*types.Alert
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equal model.LabelNames
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input model.LabelSet
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result bool
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}{
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{
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// No source alerts at all.
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initial: map[model.Fingerprint]*types.Alert{},
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input: model.LabelSet{"a": "b"},
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result: false,
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},
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{
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// No equal labels, any source alerts satisfies the requirement.
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initial: map[model.Fingerprint]*types.Alert{1: &types.Alert{}},
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input: model.LabelSet{"a": "b"},
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result: true,
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},
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{
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// Matching but already resolved.
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initial: map[model.Fingerprint]*types.Alert{
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1: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "b", "b": "f"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(-time.Second),
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},
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},
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2: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "b", "b": "c"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(-time.Second),
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},
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},
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},
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equal: model.LabelNames{"a", "b"},
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input: model.LabelSet{"a": "b", "b": "c"},
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result: false,
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},
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{
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// Matching and unresolved.
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initial: map[model.Fingerprint]*types.Alert{
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1: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "b", "c": "d"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(-time.Second),
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},
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},
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2: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "b", "c": "f"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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},
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},
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equal: model.LabelNames{"a"},
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input: model.LabelSet{"a": "b"},
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result: true,
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},
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{
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// Equal label does not match.
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initial: map[model.Fingerprint]*types.Alert{
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1: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "c", "c": "d"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(-time.Second),
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},
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},
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2: &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"a": "c", "c": "f"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(-time.Second),
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},
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},
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},
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equal: model.LabelNames{"a"},
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input: model.LabelSet{"a": "b"},
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result: false,
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},
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}
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for _, c := range cases {
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r := &InhibitRule{
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Equal: map[model.LabelName]struct{}{},
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scache: store.NewAlerts(),
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}
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for _, ln := range c.equal {
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r.Equal[ln] = struct{}{}
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}
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for _, v := range c.initial {
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r.scache.Set(v)
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}
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if _, have := r.hasEqual(c.input, false); have != c.result {
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t.Errorf("Unexpected result %t, expected %t", have, c.result)
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}
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}
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}
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func TestInhibitRuleMatches(t *testing.T) {
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t.Parallel()
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rule1 := config.InhibitRule{
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SourceMatch: map[string]string{"s1": "1"},
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TargetMatch: map[string]string{"t1": "1"},
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Equal: model.LabelNames{"e"},
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}
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rule2 := config.InhibitRule{
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SourceMatch: map[string]string{"s2": "1"},
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TargetMatch: map[string]string{"t2": "1"},
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Equal: model.LabelNames{"e"},
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}
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m := types.NewMarker(prometheus.NewRegistry())
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ih := NewInhibitor(nil, []*config.InhibitRule{&rule1, &rule2}, m, nopLogger)
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now := time.Now()
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// Active alert that matches the source filter of rule1.
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sourceAlert1 := &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"s1": "1", "t1": "2", "e": "1"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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}
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// Active alert that matches the source filter _and_ the target filter of rule2.
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sourceAlert2 := &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"s2": "1", "t2": "1", "e": "1"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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}
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ih.rules[0].scache = store.NewAlerts()
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ih.rules[0].scache.Set(sourceAlert1)
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ih.rules[1].scache = store.NewAlerts()
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ih.rules[1].scache.Set(sourceAlert2)
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cases := []struct {
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target model.LabelSet
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expected bool
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}{
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{
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// Matches target filter of rule1, inhibited.
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target: model.LabelSet{"t1": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches target filter of rule2, inhibited.
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target: model.LabelSet{"t2": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches target filter of rule1 (plus noise), inhibited.
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target: model.LabelSet{"t1": "1", "t3": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches target filter of rule1 plus rule2, inhibited.
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target: model.LabelSet{"t1": "1", "t2": "1", "e": "1"},
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expected: true,
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},
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{
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// Doesn't match target filter, not inhibited.
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target: model.LabelSet{"t1": "0", "e": "1"},
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expected: false,
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},
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{
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// Matches both source and target filters of rule1,
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// inhibited because sourceAlert1 matches only the
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// source filter of rule1.
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target: model.LabelSet{"s1": "1", "t1": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches both source and target filters of rule2,
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// not inhibited because sourceAlert2 matches also both the
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// source and target filter of rule2.
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target: model.LabelSet{"s2": "1", "t2": "1", "e": "1"},
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expected: false,
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},
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{
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// Matches target filter, equal label doesn't match, not inhibited
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target: model.LabelSet{"t1": "1", "e": "0"},
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expected: false,
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},
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}
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for _, c := range cases {
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if actual := ih.Mutes(c.target); actual != c.expected {
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t.Errorf("Expected (*Inhibitor).Mutes(%v) to return %t but got %t", c.target, c.expected, actual)
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}
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}
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}
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func TestInhibitRuleMatchers(t *testing.T) {
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t.Parallel()
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rule1 := config.InhibitRule{
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SourceMatchers: config.Matchers{&labels.Matcher{Type: labels.MatchEqual, Name: "s1", Value: "1"}},
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TargetMatchers: config.Matchers{&labels.Matcher{Type: labels.MatchNotEqual, Name: "t1", Value: "1"}},
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Equal: model.LabelNames{"e"},
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}
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rule2 := config.InhibitRule{
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SourceMatchers: config.Matchers{&labels.Matcher{Type: labels.MatchEqual, Name: "s2", Value: "1"}},
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TargetMatchers: config.Matchers{&labels.Matcher{Type: labels.MatchEqual, Name: "t2", Value: "1"}},
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Equal: model.LabelNames{"e"},
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}
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m := types.NewMarker(prometheus.NewRegistry())
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ih := NewInhibitor(nil, []*config.InhibitRule{&rule1, &rule2}, m, nopLogger)
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now := time.Now()
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// Active alert that matches the source filter of rule1.
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sourceAlert1 := &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"s1": "1", "t1": "2", "e": "1"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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}
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// Active alert that matches the source filter _and_ the target filter of rule2.
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sourceAlert2 := &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"s2": "1", "t2": "1", "e": "1"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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}
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ih.rules[0].scache = store.NewAlerts()
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ih.rules[0].scache.Set(sourceAlert1)
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ih.rules[1].scache = store.NewAlerts()
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ih.rules[1].scache.Set(sourceAlert2)
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cases := []struct {
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target model.LabelSet
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expected bool
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}{
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{
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// Matches target filter of rule1, inhibited.
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target: model.LabelSet{"t1": "1", "e": "1"},
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expected: false,
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},
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{
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// Matches target filter of rule2, inhibited.
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target: model.LabelSet{"t2": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches target filter of rule1 (plus noise), inhibited.
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target: model.LabelSet{"t1": "1", "t3": "1", "e": "1"},
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expected: false,
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},
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{
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// Matches target filter of rule1 plus rule2, inhibited.
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target: model.LabelSet{"t1": "1", "t2": "1", "e": "1"},
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expected: true,
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},
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{
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// Doesn't match target filter, not inhibited.
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target: model.LabelSet{"t1": "0", "e": "1"},
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expected: true,
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},
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{
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// Matches both source and target filters of rule1,
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// inhibited because sourceAlert1 matches only the
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// source filter of rule1.
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target: model.LabelSet{"s1": "1", "t1": "1", "e": "1"},
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expected: false,
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},
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{
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// Matches both source and target filters of rule2,
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// not inhibited because sourceAlert2 matches also both the
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// source and target filter of rule2.
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target: model.LabelSet{"s2": "1", "t2": "1", "e": "1"},
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expected: true,
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},
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{
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// Matches target filter, equal label doesn't match, not inhibited
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target: model.LabelSet{"t1": "1", "e": "0"},
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expected: false,
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},
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}
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for _, c := range cases {
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if actual := ih.Mutes(c.target); actual != c.expected {
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t.Errorf("Expected (*Inhibitor).Mutes(%v) to return %t but got %t", c.target, c.expected, actual)
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}
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}
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}
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type fakeAlerts struct {
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alerts []*types.Alert
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finished chan struct{}
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}
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func newFakeAlerts(alerts []*types.Alert) *fakeAlerts {
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return &fakeAlerts{
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alerts: alerts,
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finished: make(chan struct{}),
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}
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}
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func (f *fakeAlerts) GetPending() provider.AlertIterator { return nil }
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func (f *fakeAlerts) Get(model.Fingerprint) (*types.Alert, error) { return nil, nil }
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func (f *fakeAlerts) Put(...*types.Alert) error { return nil }
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func (f *fakeAlerts) Subscribe() provider.AlertIterator {
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ch := make(chan *types.Alert)
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done := make(chan struct{})
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go func() {
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for _, a := range f.alerts {
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ch <- a
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}
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// Send another (meaningless) alert to make sure that the inhibitor has
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// processed everything.
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ch <- &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{},
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StartsAt: time.Now(),
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},
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}
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close(f.finished)
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<-done
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}()
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return provider.NewAlertIterator(ch, done, nil)
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}
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func TestInhibit(t *testing.T) {
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t.Parallel()
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now := time.Now()
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inhibitRule := func() *config.InhibitRule {
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return &config.InhibitRule{
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SourceMatch: map[string]string{"s": "1"},
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TargetMatch: map[string]string{"t": "1"},
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Equal: model.LabelNames{"e"},
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}
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}
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// alertOne is muted by alertTwo when it is active.
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alertOne := func() *types.Alert {
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return &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"t": "1", "e": "f"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: now.Add(time.Hour),
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},
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}
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}
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alertTwo := func(resolved bool) *types.Alert {
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var end time.Time
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if resolved {
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end = now.Add(-time.Second)
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} else {
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end = now.Add(time.Hour)
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}
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return &types.Alert{
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Alert: model.Alert{
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Labels: model.LabelSet{"s": "1", "e": "f"},
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StartsAt: now.Add(-time.Minute),
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EndsAt: end,
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},
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}
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}
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type exp struct {
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lbls model.LabelSet
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muted bool
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}
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for i, tc := range []struct {
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alerts []*types.Alert
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expected []exp
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}{
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{
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// alertOne shouldn't be muted since alertTwo hasn't fired.
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alerts: []*types.Alert{alertOne()},
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expected: []exp{
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{
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lbls: model.LabelSet{"t": "1", "e": "f"},
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muted: false,
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},
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},
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},
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{
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// alertOne should be muted by alertTwo which is active.
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alerts: []*types.Alert{alertOne(), alertTwo(false)},
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expected: []exp{
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{
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lbls: model.LabelSet{"t": "1", "e": "f"},
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muted: true,
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},
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{
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lbls: model.LabelSet{"s": "1", "e": "f"},
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muted: false,
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},
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},
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},
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{
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// alertOne shouldn't be muted since alertTwo is resolved.
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alerts: []*types.Alert{alertOne(), alertTwo(false), alertTwo(true)},
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expected: []exp{
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{
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lbls: model.LabelSet{"t": "1", "e": "f"},
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muted: false,
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},
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{
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lbls: model.LabelSet{"s": "1", "e": "f"},
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muted: false,
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},
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},
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},
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} {
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ap := newFakeAlerts(tc.alerts)
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mk := types.NewMarker(prometheus.NewRegistry())
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inhibitor := NewInhibitor(ap, []*config.InhibitRule{inhibitRule()}, mk, nopLogger)
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go func() {
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for ap.finished != nil {
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select {
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case <-ap.finished:
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ap.finished = nil
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default:
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}
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}
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inhibitor.Stop()
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}()
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inhibitor.Run()
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for _, expected := range tc.expected {
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if inhibitor.Mutes(expected.lbls) != expected.muted {
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mute := "unmuted"
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if expected.muted {
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mute = "muted"
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}
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t.Errorf("tc: %d, expected alert with labels %q to be %s", i, expected.lbls, mute)
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}
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}
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}
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}
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