Add a time object in the fluentd event

[frsh-augustin]

Hi,

I'd like to add time filed in the event, the following example appears to add a string type "formatted_time", but I need a time type field.

<filter pattern>
  @type record_modifier
  <record>
    formatted_time ${Time.at(time).to_s}
  </record>
</filter>

I try the following way

<filter pattern>
  @type record_modifier
  <record>
    formatted_time ${time}
  </record>
</filter>

But I got the following errors:

2021-11-10 06:24:28.085795373 +0000 fluent.warn: {"error":"#<NoMethodError: undefined method `to_msgpack' for 2021-11-10 06:24:28 +0000:Time>","location":"/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-1.10.2/lib/fluent/event.rb:60:in `write'","tag":"iam.gu.cn.admin_api","message":"emit transaction failed: error_class=NoMethodError error=\"undefined method `to_msgpack' for 2021-11-10 06:24:28 +0000:Time\" location=\"/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-1.10.2/lib/fluent/event.rb:60:in `write'\" tag=\"iam.gu.cn.admin_api\""}

Please advise is it feasible to add a time type filed in the fluentd event? Thank you in adance.