// HTMLSnippet returns an HTML snippet representing this rule.
func (rule RecordingRule) HTMLSnippet(pathPrefix string) template.HTML {
ruleExpr := rule.vector.String()
return template.HTML(fmt.Sprintf(
`<a href="%s">%s</a>%s = <a href="%s">%s</a>`,
pathPrefix+strutil.GraphLinkForExpression(rule.name),
rule.name,
template.HTMLEscapeString(rule.labels.String()),
pathPrefix+strutil.GraphLinkForExpression(ruleExpr),
template.HTMLEscapeString(ruleExpr)))
}
// HTMLSnippet returns an HTML snippet representing this alerting rule.
func (rule *AlertingRule) HTMLSnippet(pathPrefix string) template.HTML {
alertMetric := clientmodel.Metric{
clientmodel.MetricNameLabel: alertMetricName,
alertNameLabel: clientmodel.LabelValue(rule.name),
}
return template.HTML(fmt.Sprintf(
`ALERT <a href="%s">%s</a> IF <a href="%s">%s</a> FOR %s WITH %s`,
pathPrefix+strutil.GraphLinkForExpression(alertMetric.String()),
rule.name,
pathPrefix+strutil.GraphLinkForExpression(rule.vector.String()),
rule.vector,
strutil.DurationToString(rule.holdDuration),
rule.labels))
}
// sendAlerts sends alert notifications for the given rule.
func (g *Group) sendAlerts(rule *AlertingRule, timestamp model.Time) error {
var alerts model.Alerts
for _, alert := range rule.currentAlerts() {
// Only send actually firing alerts.
if alert.State == StatePending {
continue
}
a := &model.Alert{
StartsAt: alert.ActiveAt.Add(rule.holdDuration).Time(),
Labels: alert.Labels,
Annotations: alert.Annotations,
GeneratorURL: g.opts.ExternalURL.String() + strutil.GraphLinkForExpression(rule.vector.String()),
}
if alert.ResolvedAt != 0 {
a.EndsAt = alert.ResolvedAt.Time()
}
alerts = append(alerts, a)
}
if len(alerts) > 0 {
g.opts.Notifier.Send(alerts...)
}
return nil
}
// HTMLSnippet returns an HTML snippet representing this alerting rule. The
// resulting snippet is expected to be presented in a <pre> element, so that
// line breaks and other returned whitespace is respected.
func (rule *AlertingRule) HTMLSnippet(pathPrefix string) template.HTML {
alertMetric := model.Metric{
model.MetricNameLabel: alertMetricName,
alertNameLabel: model.LabelValue(rule.name),
}
s := fmt.Sprintf("ALERT <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(alertMetric.String()), rule.name)
s += fmt.Sprintf("\n IF <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(rule.vector.String()), rule.vector)
if rule.holdDuration > 0 {
s += fmt.Sprintf("\n FOR %s", strutil.DurationToString(rule.holdDuration))
}
if len(rule.labels) > 0 {
s += fmt.Sprintf("\n WITH %s", rule.labels)
}
if len(rule.annotations) > 0 {
s += fmt.Sprintf("\n ANNOTATIONS %s", rule.annotations)
}
return template.HTML(s)
}
// HTMLSnippet returns an HTML snippet representing this alerting rule. The
// resulting snippet is expected to be presented in a <pre> element, so that
// line breaks and other returned whitespace is respected.
func (r *AlertingRule) HTMLSnippet(pathPrefix string) html_template.HTML {
alertMetric := model.Metric{
model.MetricNameLabel: alertMetricName,
alertNameLabel: model.LabelValue(r.name),
}
s := fmt.Sprintf("ALERT <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(alertMetric.String()), r.name)
s += fmt.Sprintf("\n IF <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(r.vector.String()), html_template.HTMLEscapeString(r.vector.String()))
if r.holdDuration > 0 {
s += fmt.Sprintf("\n FOR %s", model.Duration(r.holdDuration))
}
if len(r.labels) > 0 {
s += fmt.Sprintf("\n LABELS %s", html_template.HTMLEscapeString(r.labels.String()))
}
if len(r.annotations) > 0 {
s += fmt.Sprintf("\n ANNOTATIONS %s", html_template.HTMLEscapeString(r.annotations.String()))
}
return html_template.HTML(s)
}
// HTMLSnippet returns an HTML snippet representing this alerting rule. The
// resulting snippet is expected to be presented in a <pre> element, so that
// line breaks and other returned whitespace is respected.
func (rule *AlertingRule) HTMLSnippet(pathPrefix string) template.HTML {
alertMetric := model.Metric{
model.MetricNameLabel: alertMetricName,
alertNameLabel: model.LabelValue(rule.name),
}
s := fmt.Sprintf("ALERT <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(alertMetric.String()), rule.name)
s += fmt.Sprintf("\n IF <a href=%q>%s</a>", pathPrefix+strutil.GraphLinkForExpression(rule.vector.String()), rule.vector)
if rule.holdDuration > 0 {
s += fmt.Sprintf("\n FOR %s", strutil.DurationToString(rule.holdDuration))
}
if len(rule.labels) > 0 {
s += fmt.Sprintf("\n WITH %s", rule.labels)
}
s += fmt.Sprintf("\n SUMMARY %q", rule.summary)
s += fmt.Sprintf("\n DESCRIPTION %q", rule.description)
s += fmt.Sprintf("\n RUNBOOK %q", rule.runbook)
return template.HTML(s)
}
func (m *Manager) queueAlertNotifications(rule *AlertingRule, timestamp clientmodel.Timestamp) {
activeAlerts := rule.ActiveAlerts()
if len(activeAlerts) == 0 {
return
}
notifications := make(notification.NotificationReqs, 0, len(activeAlerts))
for _, aa := range activeAlerts {
if aa.State != StateFiring {
// BUG: In the future, make AlertManager support pending alerts?
continue
}
// Provide the alert information to the template.
l := map[string]string{}
for k, v := range aa.Labels {
l[string(k)] = string(v)
}
tmplData := struct {
Labels map[string]string
Value clientmodel.SampleValue
}{
Labels: l,
Value: aa.Value,
}
// Inject some convenience variables that are easier to remember for users
// who are not used to Go's templating system.
defs := "{{$labels := .Labels}}{{$value := .Value}}"
expand := func(text string) string {
tmpl := template.NewTemplateExpander(defs+text, "__alert_"+rule.Name(), tmplData, timestamp, m.queryEngine, m.externalURL.Path)
result, err := tmpl.Expand()
if err != nil {
result = err.Error()
log.Warnf("Error expanding alert template %v with data '%v': %v", rule.Name(), tmplData, err)
}
return result
}
notifications = append(notifications, ¬ification.NotificationReq{
Summary: expand(rule.summary),
Description: expand(rule.description),
Runbook: rule.runbook,
Labels: aa.Labels.Merge(clientmodel.LabelSet{
alertNameLabel: clientmodel.LabelValue(rule.Name()),
}),
Value: aa.Value,
ActiveSince: aa.ActiveSince.Time(),
RuleString: rule.String(),
GeneratorURL: m.externalURL.String() + strutil.GraphLinkForExpression(rule.vector.String()),
})
}
m.notificationHandler.SubmitReqs(notifications)
}
// sendAlerts sends alert notifications for the given rule.
func (g *Group) sendAlerts(rule *AlertingRule, timestamp model.Time) error {
var alerts model.Alerts
for _, alert := range rule.currentAlerts() {
// Only send actually firing alerts.
if alert.State == StatePending {
continue
}
// Provide the alert information to the template.
l := make(map[string]string, len(alert.Labels))
for k, v := range alert.Labels {
l[string(k)] = string(v)
}
tmplData := struct {
Labels map[string]string
Value float64
}{
Labels: l,
Value: float64(alert.Value),
}
// Inject some convenience variables that are easier to remember for users
// who are not used to Go's templating system.
defs := "{{$labels := .Labels}}{{$value := .Value}}"
expand := func(text model.LabelValue) model.LabelValue {
tmpl := template.NewTemplateExpander(
defs+string(text),
"__alert_"+rule.Name(),
tmplData,
timestamp,
g.opts.QueryEngine,
g.opts.ExternalURL.Path,
)
result, err := tmpl.Expand()
if err != nil {
result = fmt.Sprintf("<error expanding template: %s>", err)
log.Warnf("Error expanding alert template %v with data '%v': %s", rule.Name(), tmplData, err)
}
return model.LabelValue(result)
}
labels := make(model.LabelSet, len(alert.Labels)+1)
for ln, lv := range alert.Labels {
labels[ln] = expand(lv)
}
labels[model.AlertNameLabel] = model.LabelValue(rule.Name())
annotations := make(model.LabelSet, len(rule.annotations))
for an, av := range rule.annotations {
annotations[an] = expand(av)
}
a := &model.Alert{
StartsAt: alert.ActiveAt.Add(rule.holdDuration).Time(),
Labels: labels,
Annotations: annotations,
GeneratorURL: g.opts.ExternalURL.String() + strutil.GraphLinkForExpression(rule.vector.String()),
}
if alert.ResolvedAt != 0 {
a.EndsAt = alert.ResolvedAt.Time()
}
alerts = append(alerts, a)
}
if len(alerts) > 0 {
g.opts.NotificationHandler.Send(alerts...)
}
return nil
}