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92 lines
2.7 KiB
92 lines
2.7 KiB
3 months ago
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// 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 notifier
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import (
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"fmt"
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"time"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/relabel"
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)
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// Alert is a generic representation of an alert in the Prometheus eco-system.
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type Alert struct {
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// Label value pairs for purpose of aggregation, matching, and disposition
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// dispatching. This must minimally include an "alertname" label.
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Labels labels.Labels `json:"labels"`
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// Extra key/value information which does not define alert identity.
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Annotations labels.Labels `json:"annotations"`
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// The known time range for this alert. Both ends are optional.
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StartsAt time.Time `json:"startsAt,omitempty"`
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EndsAt time.Time `json:"endsAt,omitempty"`
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GeneratorURL string `json:"generatorURL,omitempty"`
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}
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// Name returns the name of the alert. It is equivalent to the "alertname" label.
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func (a *Alert) Name() string {
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return a.Labels.Get(labels.AlertName)
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}
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// Hash returns a hash over the alert. It is equivalent to the alert labels hash.
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func (a *Alert) Hash() uint64 {
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return a.Labels.Hash()
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}
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func (a *Alert) String() string {
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s := fmt.Sprintf("%s[%s]", a.Name(), fmt.Sprintf("%016x", a.Hash())[:7])
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if a.Resolved() {
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return s + "[resolved]"
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}
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return s + "[active]"
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}
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// Resolved returns true iff the activity interval ended in the past.
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func (a *Alert) Resolved() bool {
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return a.ResolvedAt(time.Now())
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}
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// ResolvedAt returns true iff the activity interval ended before
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// the given timestamp.
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func (a *Alert) ResolvedAt(ts time.Time) bool {
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if a.EndsAt.IsZero() {
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return false
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}
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return !a.EndsAt.After(ts)
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}
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func relabelAlerts(relabelConfigs []*relabel.Config, externalLabels labels.Labels, alerts []*Alert) []*Alert {
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lb := labels.NewBuilder(labels.EmptyLabels())
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var relabeledAlerts []*Alert
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for _, a := range alerts {
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lb.Reset(a.Labels)
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externalLabels.Range(func(l labels.Label) {
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if a.Labels.Get(l.Name) == "" {
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lb.Set(l.Name, l.Value)
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}
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})
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keep := relabel.ProcessBuilder(lb, relabelConfigs...)
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if !keep {
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continue
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}
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a.Labels = lb.Labels()
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relabeledAlerts = append(relabeledAlerts, a)
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}
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return relabeledAlerts
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}
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