mirror of
https://github.com/prometheus/alertmanager
synced 2025-02-06 05:31:44 +00:00
109 lines
2.9 KiB
Go
109 lines
2.9 KiB
Go
package main
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import (
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"github.com/prometheus/common/model"
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"github.com/prometheus/log"
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"golang.org/x/net/context"
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"github.com/prometheus/alertmanager/config"
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"github.com/prometheus/alertmanager/types"
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)
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type Notifier interface {
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Notify(context.Context, ...*types.Alert) error
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}
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type LogNotifier struct {
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name string
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}
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func (ln *LogNotifier) Notify(ctx context.Context, alerts ...*types.Alert) error {
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log.Infof("notify %q", ln.name)
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for _, a := range alerts {
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log.Infof("- %v", a)
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}
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return nil
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}
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// An InhibitRule specifies that a class of (source) alerts should inhibit
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// notifications for another class of (target) alerts if all specified matching
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// labels are equal between the two alerts. This may be used to inhibit alerts
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// from sending notifications if their meaning is logically a subset of a
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// higher-level alert.
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type InhibitRule struct {
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// The set of Filters which define the group of source alerts (which inhibit
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// the target alerts).
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SourceMatchers types.Matchers
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// The set of Filters which define the group of target alerts (which are
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// inhibited by the source alerts).
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TargetMatchers types.Matchers
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// A set of label names whose label values need to be identical in source and
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// target alerts in order for the inhibition to take effect.
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Equal map[model.LabelName]struct{}
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}
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func NewInhibitRule(cr config.InhibitRule) *InhibitRule {
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var (
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sourcem types.Matchers
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targetm types.Matchers
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equal map[model.LabelName]struct{}
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)
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for ln, lv := range cr.SourceMatch {
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sourcem = append(sourcem, types.NewMatcher(model.LabelName(ln), lv))
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}
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for ln, lv := range cr.SourceMatchRE {
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m, err := types.NewRegexMatcher(model.LabelName(ln), lv.String())
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if err != nil {
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// Must have been sanitized during config validation.
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panic(err)
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}
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sourcem = append(sourcem, m)
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}
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for ln, lv := range cr.TargetMatch {
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targetm = append(targetm, types.NewMatcher(model.LabelName(ln), lv))
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}
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for ln, lv := range cr.TargetMatchRE {
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m, err := types.NewRegexMatcher(model.LabelName(ln), lv.String())
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if err != nil {
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// Must have been sanitized during config validation.
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panic(err)
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}
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targetm = append(targetm, m)
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}
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for _, ln := range cr.Equal {
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equal[ln] = struct{}{}
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}
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return &InhibitRule{
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SourceMatchers: sourcem,
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TargetMatchers: targetm,
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Equal: equal,
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}
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}
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// silencedNotifier wraps a notifier and applies a Silencer
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// before sending out an alert.
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type silencedNotifier struct {
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Notifier
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silencer types.Silencer
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}
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func (n *silencedNotifier) Notify(ctx context.Context, alerts ...*types.Alert) error {
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var filtered []*types.Alert
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for _, a := range alerts {
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// TODO(fabxc): increment total alerts counter.
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// Do not send the alert if the silencer mutes it.
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if !n.silencer.Mutes(a.Labels) {
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// TODO(fabxc): increment muted alerts counter.
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filtered = append(filtered, a)
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}
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}
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return n.Notifier.Notify(ctx, filtered...)
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}
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