Feature Request

Opening a feature request kicks off a discussion.

Proposal:

Have a setting for the parser like logfmt.tag_values as an array that specifies (glob support) which fields should be added as a tag directly.

Current behavior:

All parsed key/value pairs are added as a field.

Desired behavior:

Configure which pairs would be added as a tag.

Use case:

I'm using logfmt as a parser for processors.parser and then it becomes difficult to diferentiate if a field was already present before or after the addition from the parser if I would want to convert it to a tag.