From 20d94f9703a9c74d5a6d2551b4ddb725d977c5a2 Mon Sep 17 00:00:00 2001
From: Mitsuhiro Tanda <mitsuhiro.tanda@gmail.com>
Date: Sat, 17 Jun 2017 12:30:40 +0900
Subject: [PATCH] support alertmanager

---
 .../alerting/notifiers/alertmanager.go        | 95 +++++++++++++++++++
 .../alerting/notifiers/alertmanager_test.go   | 50 ++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 pkg/services/alerting/notifiers/alertmanager.go
 create mode 100644 pkg/services/alerting/notifiers/alertmanager_test.go

diff --git a/pkg/services/alerting/notifiers/alertmanager.go b/pkg/services/alerting/notifiers/alertmanager.go
new file mode 100644
index 00000000000..29b2474d8c9
--- /dev/null
+++ b/pkg/services/alerting/notifiers/alertmanager.go
@@ -0,0 +1,95 @@
+package notifiers
+
+import (
+	"time"
+
+	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/log"
+	m "github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/alerting"
+)
+
+func init() {
+	alerting.RegisterNotifier(&alerting.NotifierPlugin{
+		Type:        "alertmanager",
+		Name:        "alertmanager",
+		Description: "Sends alert to Alertmanager",
+		Factory:     NewAlertmanagerNotifier,
+		OptionsTemplate: `
+      <h3 class="page-heading">Alertmanager settings</h3>
+      <div class="gf-form">
+        <span class="gf-form-label width-10">Url</span>
+        <input type="text" required class="gf-form-input max-width-26" ng-model="ctrl.model.settings.url" placeholder="http://localhost:9093"></input>
+      </div>
+    `,
+	})
+}
+
+func NewAlertmanagerNotifier(model *m.AlertNotification) (alerting.Notifier, error) {
+	url := model.Settings.Get("url").MustString()
+	if url == "" {
+		return nil, alerting.ValidationError{Reason: "Could not find url property in settings"}
+	}
+
+	return &AlertmanagerNotifier{
+		NotifierBase: NewNotifierBase(model.Id, model.IsDefault, model.Name, model.Type, model.Settings),
+		Url:          url,
+		log:          log.New("alerting.notifier.alertmanager"),
+	}, nil
+}
+
+type AlertmanagerNotifier struct {
+	NotifierBase
+	Url string
+	log log.Logger
+}
+
+func (this *AlertmanagerNotifier) Notify(evalContext *alerting.EvalContext) error {
+	this.log.Info("Sending alertmanager")
+
+	alerts := make([]interface{}, 0)
+	for _, match := range evalContext.EvalMatches {
+		alertJSON := simplejson.New()
+		alertJSON.Set("startsAt", evalContext.StartTime.UTC().Format(time.RFC3339))
+		if evalContext.Rule.State == m.AlertStateAlerting {
+			alertJSON.Set("endsAt", "0001-01-01T00:00:00Z")
+		} else {
+			alertJSON.Set("endsAt", evalContext.EndTime.UTC().Format(time.RFC3339))
+		}
+
+		ruleUrl, err := evalContext.GetRuleUrl()
+		if err == nil {
+			alertJSON.Set("generatorURL", ruleUrl)
+		}
+
+		if evalContext.Rule.Message != "" {
+			alertJSON.SetPath([]string{"annotations", "description"}, evalContext.Rule.Message)
+		}
+
+		tags := make(map[string]string)
+		for k, v := range match.Tags {
+			tags[k] = v
+		}
+		tags["alertname"] = evalContext.Rule.Name
+		alertJSON.Set("labels", tags)
+
+		alerts = append(alerts, alertJSON)
+	}
+
+	bodyJSON := simplejson.NewFromAny(alerts)
+	body, _ := bodyJSON.MarshalJSON()
+
+	cmd := &m.SendWebhookSync{
+		Url:        this.Url + "/api/v1/alerts",
+		HttpMethod: "POST",
+		Body:       string(body),
+	}
+
+	if err := bus.DispatchCtx(evalContext.Ctx, cmd); err != nil {
+		this.log.Error("Failed to send alertmanager", "error", err, "alertmanager", this.Name)
+		return err
+	}
+
+	return nil
+}
diff --git a/pkg/services/alerting/notifiers/alertmanager_test.go b/pkg/services/alerting/notifiers/alertmanager_test.go
new file mode 100644
index 00000000000..78c9511c783
--- /dev/null
+++ b/pkg/services/alerting/notifiers/alertmanager_test.go
@@ -0,0 +1,50 @@
+package notifiers
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	m "github.com/grafana/grafana/pkg/models"
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestAlertmanagerNotifier(t *testing.T) {
+	Convey("Alertmanager notifier tests", t, func() {
+
+		Convey("Parsing alert notification from settings", func() {
+			Convey("empty settings should return error", func() {
+				json := `{ }`
+
+				settingsJSON, _ := simplejson.NewJson([]byte(json))
+				model := &m.AlertNotification{
+					Name:     "alertmanager",
+					Type:     "alertmanager",
+					Settings: settingsJSON,
+				}
+
+				_, err := NewAlertmanagerNotifier(model)
+				So(err, ShouldNotBeNil)
+			})
+
+			Convey("from settings", func() {
+				json := `
+				{
+          "url": "http://127.0.0.1:9093/"
+				}`
+
+				settingsJSON, _ := simplejson.NewJson([]byte(json))
+				model := &m.AlertNotification{
+					Name:     "alertmanager",
+					Type:     "alertmanager",
+					Settings: settingsJSON,
+				}
+
+				not, err := NewAlertmanagerNotifier(model)
+				alertmanagerNotifier := not.(*AlertmanagerNotifier)
+
+				So(err, ShouldBeNil)
+				So(alertmanagerNotifier.Url, ShouldEqual, "http://127.0.0.1:9093/")
+			})
+		})
+	})
+}