Add templating to PD-CEF fields; Add missing field (prometheus#1231)

* Allow templating of Component and Group in PagerDuty v2

Related to prometheus#1211

* Add missing PD-CEF field Component

Author: mikebryant

config/notifiers.go

@@ -203,6 +203,7 @@ type PagerdutyConfig struct {
 	Description string            `yaml:"description,omitempty" json:"description,omitempty"`
 	Details     map[string]string `yaml:"details,omitempty" json:"details,omitempty"`
 	Severity    string            `yaml:"severity,omitempty" json:"severity,omitempty"`
+	Class       string            `yaml:"class,omitempty" json:"class,omitempty"`
 	Component   string            `yaml:"component,omitempty" json:"component,omitempty"`
 	Group       string            `yaml:"group,omitempty" json:"group,omitempty"`
 

notify/impl.go

@@ -460,6 +460,7 @@ type pagerDutyPayload struct {
 	Source        string            `json:"source"`
 	Severity      string            `json:"severity"`
 	Timestamp     string            `json:"timestamp,omitempty"`
+	Class         string            `json:"class,omitempty"`
 	Component     string            `json:"component,omitempty"`
 	Group         string            `json:"group,omitempty"`
 	CustomDetails map[string]string `json:"custom_details,omitempty"`
@@ -508,8 +509,9 @@ func (n *PagerDuty) notifyV2(ctx context.Context, eventType, key string, tmpl fu
 			Source:        tmpl(n.conf.Client),
 			Severity:      tmpl(n.conf.Severity),
 			CustomDetails: details,
-			Component:     n.conf.Component,
-			Group:         n.conf.Group,
+			Class:         tmpl(n.conf.Class),
+			Component:     tmpl(n.conf.Component),
+			Group:         tmpl(n.conf.Group),
 		}
 	}