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2d5d239883
Independent Alertmanager queues avoid issues with queue overflowing when one or more Alertmanager instances are unavailable which could result in lost alert notifications. The buffered queues are managed per AlertmanagerSet which are dynamically added/removed with service discovery or configuration reload. The following metrics now include an extra dimention for alertmanager label: - prometheus_notifications_dropped_total - prometheus_notifications_queue_capacity - prometheus_notifications_queue_length This change also includes the test from #14099 Closes #7676 Signed-off-by: Siavash Safi <siavash@cloudflare.com>
107 lines
3.0 KiB
Go
107 lines
3.0 KiB
Go
// Copyright 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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// Copy returns a copy of the alert.
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func (a *Alert) Copy() *Alert {
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return &Alert{
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Labels: a.Labels.Copy(),
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Annotations: a.Annotations.Copy(),
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StartsAt: a.StartsAt,
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EndsAt: a.EndsAt,
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GeneratorURL: a.GeneratorURL,
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}
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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 _, s := range alerts {
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// Copy the alert to avoid race condition between multiple alertmanagersets
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// holding references to the same alerts.
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a := s.Copy()
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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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