Format date field as a string?

I would like to create a new string field from a date field (@timestamp) in the format "yyyy-MM-dd" (e.g. 2020-12-31) - is that possible with Logstash?

Read through this thread.

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Aha, so only by jumping to ruby? Not with mutate?

Is there instead a way to zero-pad a number without ruby?

You cannot convert a date using mutate. I do not think you can zero pad without using ruby.

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