feat(kapacitor): add serviceNow alert properties to server

kapacitor.go

@@ -24,6 +24,7 @@ type AlertNodes struct {
 	OpsGenie2          []*OpsGenie   `json:"opsGenie2"`        // OpsGenie2  will send alert to all OpsGenie v2
 	Talk               []*Talk       `json:"talk"`             // Talk will send alert to all Talk
 	Kafka              []*Kafka      `json:"kafka"`            // Kafka will send alert to all Kafka
+	ServiceNow         []*ServiceNow `json:"serviceNow"`       // ServiceNow alert options
 }
 
 // Post will POST alerts to a destination URL
@@ -144,6 +145,16 @@ type Kafka struct {
 	Template string `json:"template"`
 }
 
+// ServiceNow properties
+type ServiceNow struct {
+	Source     string `json:"source"`
+	Node       string `json:"node"`
+	Type       string `json:"type"`
+	Resource   string `json:"resource"`
+	MetricName string `json:"metric_name"`
+	MessageKey string `json:"message_key"`
+}
+
 // MarshalJSON converts AlertNodes to JSON
 func (n *AlertNodes) MarshalJSON() ([]byte, error) {
 	type Alias AlertNodes

kapacitor/alerts.go

@@ -19,8 +19,18 @@ func AlertServices(rule chronograf.AlertRule) (string, error) {
 	}
 
 	if err := ValidateAlert(node); err != nil {
+		// workaround for not-yet released fix https://github.com/influxdata/kapacitor/pull/2488
+		// it can be deleted once kapacitor 1.5.9+ is released
+		// can be simply: return "", err
+		if !strings.Contains(err.Error(), `property "servicenow"`) {
 			return "", err
 		}
+		// no method or property "servicenow" on *pipeline.AlertNode
+		node = strings.Replace(node, ".servicenow()", ".serviceNow()", 1)
+		if err2 := ValidateAlert(node); err2 != nil {
+			return "", err
+		}
+	}
 	return node, nil
 }
 

kapacitor/alerts_test.go

@@ -139,6 +139,30 @@ func TestAlertServices(t *testing.T) {
 			want: `alert()
         .post('http://myaddress')
         .header('key', 'value')
+`,
+		},
+		{
+			name: "Test serviceNow",
+			rule: chronograf.AlertRule{
+				AlertNodes: chronograf.AlertNodes{
+					ServiceNow: []*chronograf.ServiceNow{{
+						Source:     "a",
+						Type:       "b",
+						Node:       "c",
+						Resource:   "d",
+						MetricName: "e",
+						MessageKey: "f",
+					}},
+				},
+			},
+			want: `alert()
+        .serviceNow()
+        .source('a')
+        .node('c')
+        .type('b')
+        .resource('d')
+        .metricName('e')
+        .messageKey('f')
 `,
 		},
 	}