gem install fluent-plugin-split-array

<filter foo.bar.*>
  type split_array
</filter>

[{'a' => 'b'}, {'a' => 'c'}]

{'a' => 'b'}
{'a' => 'c'}

<filter foo.bar.*>
  type split_array
  split_key records
</filter>

{"requestId":"034f","timestamp":1578090901599,"records":[{"data":"Log entry 1"},{"data":"Log entry 2"}]}

{'data' => 'Log entry 1'}
{'data' => 'Log entry 2'}

<source>
  type exec
  command curl -s -u guest:gutest http://127.0.0.1:15672/api/queues
  format json
  tag rabbitmq
  run_interval 10s
</source>

<filter rabbitmq>
  type split_array
</filter>

<match rabbitmq>
  type stdout
</match>