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Config: Extract Section

Extract Section Overview

The extract section can be under <match>, <source>, or <filter> sections. It is enabled for the plugins that support extracting values from the event record e.g. exec.
<source>
@type exec
# ...
<extract>
# ...
</extract>
</source>

Extract Section Parameter

Extract Parameters

  • tag_key (string) (optional): the field name to extract tag
    • Default: nil
  • keep_tag_key (bool) (optional): if true, keeps the field in the
    record after extracting its value
    • Default: false
  • time_key (string) (optional): the field name to extract the time
    • Default: nil
  • keep_time_key (bool) (optional): if true, keeps the field in the
    record after extracting its value
    • Default: false

Time Parameters

  • time_type (enum) (optional): parses/formats value according to this
    type
    • Default: float
    • Available values: float, unixtime, string
      • float: seconds from Epoch + nano seconds (e.g.
        1510544836.154709804)
      • unixtime: seconds from Epoch (e.g. 1510544815)
      • string: use format specified by time_format, local time or time
        zone
  • time_format (string) (optional): processes value according to the
    specified format. This is available only when time_type is string.
    • Default: nil
    • Available time format:
      • For more details about formatting, see
      • For more details about parsing, see
      • %iso8601 (only for parsing)
      • Use %N to parse/format with sub-second precision, because
        strptime does not support
        %3N, %6N, %9N, and %L.
  • localtime (bool) (optional): if true, uses local time. Otherwise,
    UTC is used. This is exclusive with utc.
    • Default: true
  • utc (bool) (optional): if true, uses UTC. Otherwise, local time is
    used. This is exclusive with localtime.
    • Default: false
  • timezone (string) (optional): uses the specified timezone. One can
    parse/format the time value in the specified timezone format.
    • Default: nil
    • Available time zone format:
      1. 1.
        [+-]HH:MM (e.g. "+09:00") (recommended)
      2. 2.
        [+-]HHMM (e.g. "+0900")
      3. 3.
        [+-]HH (e.g. "+09")
      4. 4.
        Region/Zone (e.g. Asia/Tokyo)
      5. 5.
        Region/Zone/Zone (e.g. America/Argentina/Buenos_Aires)
If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is an open-source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.
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Extract Section Overview
Extract Section Parameter
Extract Parameters
Time Parameters