Use 'localhost' as default 'server' tag in zookeeper input (#4387)

plugins/inputs/zookeeper/dev/docker-compose.yml

@@ -0,0 +1,17 @@
+version: '3'
+services:
+ zoo:
+ image: zookeeper
+
+ telegraf:
+ image: glinton/scratch
+ volumes:
+ - ./telegraf.conf:/telegraf.conf
+ - ../../../../telegraf:/telegraf
+ depends_on:
+ - zoo
+ entrypoint:
+ - /telegraf
+ - --config
+ - /telegraf.conf
+ network_mode: service:zoo

plugins/inputs/zookeeper/dev/telegraf.conf

@@ -0,0 +1,9 @@
+[agent]
+ interval="1s"
+ flush_interval="1s"
+
+[[inputs.zookeeper]]
+ servers = [":2181"]
+
+[[outputs.file]]
+ files = ["stdout"]

plugins/inputs/zookeeper/zookeeper.go

@@ -158,8 +158,14 @@ func (z *Zookeeper) gatherServer(ctx context.Context, address string, acc telegr
  }
  }
  }
+
+ srv := "localhost"
+ if service[0] != "" {
+ srv = service[0]
+ }
+
  tags := map[string]string{
- "server": service[0],
+ "server": srv,
  "port": service[1],
  "state": zookeeper_state,
  }