Fluentd unexpected error error_class=Elastic::Transport::Transport::Error error="no address for http (Resolv::ResolvError)"

elasticsearch와 연동할때, host에 'http'를 같이 기술했을 때 발생

# 에러 발생
<match test>
  @type elasticsearch
  # Specify your Elasticsearch host and port.
  host http://{도메인}
  port 9200
  scheme http
</match>

# 수정후
<match test>
  @type elasticsearch
  # Specify your Elasticsearch host and port.
  host {도메인}
  port 9200
  scheme http
</match>