If format is regex, this option must be set specifying the Ruby Regular Expression that will be used to parse and compose the structured message.
If the log entry provides a field with a timestamp, this option specifies the name of that field.
Specify the format of the time field so it can be recognized and analyzed properly. Fluent-bit uses strptime(3) to parse time so you can refer to strptime documentation for available modifiers.
Specify a fixed UTC time offset (e.g. -0600, +0200, etc.) for local dates.
By default when a time key is recognized and parsed, the parser will drop the original time field. Enabling this option will make the parser to keep the original time field and it value in the log entry.
Specify the data type of parsed field. The syntax is types <field_name_1>:<type_name_1> <field_name_2>:<type_name_2> .... The supported types are string(default), integer, bool, float, hex. The option is supported by ltsv, logfmt and regex.
Decode a field value, the only decoder available is json. The syntax is: Decode_Field json <field_name>.
Parsers Configuration File
All parsers must be defined in a parsers.conf file, not in the Fluent Bit global configuration file. The parsers file expose all parsers available that can be used by the Input plugins that are aware of this feature. A parsers file can have multiple entries like this:
Time resolution and its format supported are handled by using the strftime(3) libc system function.
In addition, we extended our time resolution to support fractional seconds like 2017-05-17T15:44:31**.187512963**Z. Since Fluent Bit v0.12 we have full support for nanoseconds resolution, the %L format option for Time_Format is provided as a way to indicate that content must be interpreted as fractional seconds.
Note: The option %L is only valid when used after seconds (%S) or seconds since the Epoch (%s), e.g: %S.%L or %s.%L