Add support for NSQLookupd to nsq_consumer (#3215)

plugins/inputs/nsq_consumer/nsq_consumer.go

@@ -6,12 +6,14 @@ import (
 	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/plugins/inputs"
 	"github.com/influxdata/telegraf/plugins/parsers"
-	"github.com/nsqio/go-nsq"
+	nsq "github.com/nsqio/go-nsq"
 )
 
 //NSQConsumer represents the configuration of the plugin
 type NSQConsumer struct {
 	Server      string
+	Nsqd        []string
+	Nsqlookupd  []string
 	Topic       string
 	Channel     string
 	MaxInFlight int
@@ -21,8 +23,12 @@ type NSQConsumer struct {
 }
 
 var sampleConfig = `
-  ## An string representing the NSQD TCP Endpoint
-  server = "localhost:4150"
+  ## Server option still works but is deprecated, we just prepend it to the nsqd array.
+  # server = "localhost:4150"
+  ## An array representing the NSQD TCP HTTP Endpoints
+  nsqd = ["localhost:4150"]
+  ## An array representing the NSQLookupd HTTP Endpoints
+  nsqlookupd = ["localhost:4161"]
   topic = "telegraf"
   channel = "consumer"
   max_in_flight = 100
@@ -71,7 +77,11 @@ func (n *NSQConsumer) Start(acc telegraf.Accumulator) error {
 		message.Finish()
 		return nil
 	}), n.MaxInFlight)
-	n.consumer.ConnectToNSQD(n.Server)
+
+	if len(n.Nsqlookupd) > 0 {
+		n.consumer.ConnectToNSQLookupds(n.Nsqlookupd)
+	}
+	n.consumer.ConnectToNSQDs(append(n.Nsqd, n.Server))
 	return nil
 }