How to get the time of format YYYY-MM-dd_HH from @timestamp in output file block

Description

How to get the time of format YYYY-MM-dd_HH from @timestamp in output file block.What exactly i need is:
output {
file {
path => "/log_data/'YYYY-MM-dd_HH format time from @timestamp'.log"
}
}

I want to get the time from @timestamp but not to get the local time, and the local time is not the time in my timezone.

Environment

None

Status

Assignee

Logstash Developers

Reporter

kong zhen hao

Labels

Affects versions

Priority

Configure