gistfile1.txt

filebeat:
  output:
    elasticsearch:
      hosts: ["127.0.0.1:9200"]
    logstash:
      hosts: ["127.0.0.1:5044"]
  prospectors:
    -
      input_type: log
      paths:
        - /var/log/daemon.log
    -
      input_type: log
      paths:
        - /var/log/system.log

Filebeat cannot find any output defined as it searches for one in the output section, outside the filebeat section. Here is an example of the complete configuration file: https://github.com/elastic/beats/blob/master/filebeat/filebeat.yml