fluent-df.conf

<source> 
  type exec
  command df -k / | sed -E -e 1d -e N -e 's/\n//g' -e 's/%//' -e 's/ +/\t/g'
  tag df 
  keys fs,1024_blocks,used,available,capacity,mounted_on
  run_interval 30s
</source>                                                                                                                                                                                                                                                                                
         
<match df>
  type growthforecast
  gfapi_url http://gf.example.com/api/
  service myservicename
  section df_root
  name_keys 1024_blocks,used,available,capacity
</match>