Print the enabled aggregator and processor plugins on startup (#4212)

cmd/telegraf/telegraf.go

@@ -166,8 +166,10 @@ func reloadLoop(
 		}()
 
 		log.Printf("I! Starting Telegraf %s\n", displayVersion())
-		log.Printf("I! Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
 		log.Printf("I! Loaded inputs: %s", strings.Join(c.InputNames(), " "))
+		log.Printf("I! Loaded aggregators: %s", strings.Join(c.AggregatorNames(), " "))
+		log.Printf("I! Loaded processors: %s", strings.Join(c.ProcessorNames(), " "))
+		log.Printf("I! Loaded outputs: %s", strings.Join(c.OutputNames(), " "))
 		log.Printf("I! Tags enabled: %s", c.ListTags())
 
 		if *fPidfile != "" {

internal/config/config.go

@@ -156,6 +156,24 @@ func (c *Config) InputNames() []string {
 	return name
 }
 
+// Outputs returns a list of strings of the configured aggregators.
+func (c *Config) AggregatorNames() []string {
+	var name []string
+	for _, aggregator := range c.Aggregators {
+		name = append(name, aggregator.Name())
+	}
+	return name
+}
+
+// Outputs returns a list of strings of the configured processors.
+func (c *Config) ProcessorNames() []string {
+	var name []string
+	for _, processor := range c.Processors {
+		name = append(name, processor.Name)
+	}
+	return name
+}
+
 // Outputs returns a list of strings of the configured outputs.
 func (c *Config) OutputNames() []string {
 	var name []string