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Merge pull request #12171 from bboreham/notifier-builder

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Alerts: more efficient relabeling
This commit is contained in:
Julien Pivotto 2023-05-29 22:29:40 +02:00 committed by GitHub
parent 48ded7a99c 3711339a7d
commit a0e1525978
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 26 additions and 27 deletions
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53
notifier/notifier.go
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@ -349,19 +349,6 @@ func (n *Manager) Send(alerts ...*Alert) {
n.mtx.Lock()
defer n.mtx.Unlock()
// Attach external labels before relabelling and sending.
for _, a := range alerts {
lb := labels.NewBuilder(a.Labels)
n.opts.ExternalLabels.Range(func(l labels.Label) {
if a.Labels.Get(l.Name) == "" {
lb.Set(l.Name, l.Value)
}
})
a.Labels = lb.Labels()
}
alerts = n.relabelAlerts(alerts)
if len(alerts) == 0 {
return
@ -390,15 +377,25 @@ func (n *Manager) Send(alerts ...*Alert) {
n.setMore()
}
// Attach external labels and process relabelling rules.
func (n *Manager) relabelAlerts(alerts []*Alert) []*Alert {
lb := labels.NewBuilder(labels.EmptyLabels())
var relabeledAlerts []*Alert
for _, alert := range alerts {
labels, keep := relabel.Process(alert.Labels, n.opts.RelabelConfigs...)
if keep {
alert.Labels = labels
relabeledAlerts = append(relabeledAlerts, alert)
for _, a := range alerts {
lb.Reset(a.Labels)
n.opts.ExternalLabels.Range(func(l labels.Label) {
if a.Labels.Get(l.Name) == "" {
lb.Set(l.Name, l.Value)
}
})
keep := relabel.ProcessBuilder(lb, n.opts.RelabelConfigs...)
if !keep {
continue
}
a.Labels = lb.Labels()
relabeledAlerts = append(relabeledAlerts, a)
}
return relabeledAlerts
}
@ -701,36 +698,38 @@ func postPath(pre string, v config.AlertmanagerAPIVersion) string {
func AlertmanagerFromGroup(tg *targetgroup.Group, cfg *config.AlertmanagerConfig) ([]alertmanager, []alertmanager, error) {
var res []alertmanager
var droppedAlertManagers []alertmanager
lb := labels.NewBuilder(labels.EmptyLabels())
for _, tlset := range tg.Targets {
lbls := make([]labels.Label, 0, len(tlset)+2+len(tg.Labels))
lb.Reset(labels.EmptyLabels())
for ln, lv := range tlset {
lbls = append(lbls, labels.Label{Name: string(ln), Value: string(lv)})
lb.Set(string(ln), string(lv))
}
// Set configured scheme as the initial scheme label for overwrite.
lbls = append(lbls, labels.Label{Name: model.SchemeLabel, Value: cfg.Scheme})
lbls = append(lbls, labels.Label{Name: pathLabel, Value: postPath(cfg.PathPrefix, cfg.APIVersion)})
lb.Set(model.SchemeLabel, cfg.Scheme)
lb.Set(pathLabel, postPath(cfg.PathPrefix, cfg.APIVersion))
// Combine target labels with target group labels.
for ln, lv := range tg.Labels {
if _, ok := tlset[ln]; !ok {
lbls = append(lbls, labels.Label{Name: string(ln), Value: string(lv)})
lb.Set(string(ln), string(lv))
}
}
lset, keep := relabel.Process(labels.New(lbls...), cfg.RelabelConfigs...)
preRelabel := lb.Labels()
keep := relabel.ProcessBuilder(lb, cfg.RelabelConfigs...)
if !keep {
droppedAlertManagers = append(droppedAlertManagers, alertmanagerLabels{labels.New(lbls...)})
droppedAlertManagers = append(droppedAlertManagers, alertmanagerLabels{preRelabel})
continue
}
addr := lset.Get(model.AddressLabel)
addr := lb.Get(model.AddressLabel)
if err := config.CheckTargetAddress(model.LabelValue(addr)); err != nil {
return nil, nil, err
}
res = append(res, alertmanagerLabels{lset})
res = append(res, alertmanagerLabels{lb.Labels()})
}
return res, droppedAlertManagers, nil
}