<source>
  @type tail
  format json
  read_from_head true
  tag file-myapp.log
  path /fluentd/log/files/example-log.log
  pos_file /tmp/example-log.log.pos
</source>

<filter file-myapp.log>
  @type record_transformer
  <record>
    host_param "#{Socket.gethostname}"
  </record>
</filter>

# <match file-myapp.log>
#   @type file
#   path /output/file-myapp.log
# </match>