Ejemplo n.º 1
0
func (m *ruleManager) queueAlertNotifications(rule *rules.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 != rules.Firing {
			// 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 {
			template := templates.NewTemplateExpander(defs+text, "__alert_"+rule.Name(), tmplData, timestamp, m.storage)
			result, err := template.Expand()
			if err != nil {
				result = err.Error()
				glog.Warningf("Error expanding alert template %v with data '%v': %v", rule.Name(), tmplData, err)
			}
			return result
		}

		notifications = append(notifications, &notification.NotificationReq{
			Summary:     expand(rule.Summary),
			Description: expand(rule.Description),
			Labels: aa.Labels.Merge(clientmodel.LabelSet{
				rules.AlertNameLabel: clientmodel.LabelValue(rule.Name()),
			}),
			Value:        aa.Value,
			ActiveSince:  aa.ActiveSince.Time(),
			RuleString:   rule.String(),
			GeneratorURL: m.prometheusURL + rules.GraphLinkForExpression(rule.Vector.String()),
		})
	}
	m.notificationHandler.SubmitReqs(notifications)
}
Ejemplo n.º 2
0
func (h *ConsolesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	file, err := http.Dir(*consoleTemplatesPath).Open(r.URL.Path)
	if err != nil {
		http.Error(w, err.Error(), http.StatusNotFound)
		return
	}
	text, err := ioutil.ReadAll(file)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	// Provide URL parameters as a map for easy use. Advanced users may have need for
	// parameters beyond the first, so provide RawParams.
	rawParams, err := url.ParseQuery(r.URL.RawQuery)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	params := map[string]string{}
	for k, v := range rawParams {
		params[k] = v[0]
	}
	data := struct {
		RawParams url.Values
		Params    map[string]string
		Path      string
	}{
		RawParams: rawParams,
		Params:    params,
		Path:      r.URL.Path,
	}

	template := templates.NewTemplateExpander(string(text), "__console_"+r.URL.Path, data, clientmodel.Now(), h.Storage)
	filenames, err := filepath.Glob(*consoleLibrariesPath + "/*.lib")
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	result, err := template.ExpandHTML(filenames)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	io.WriteString(w, result)
}