Is it possible to add extra fields to individual logs?

[nickbroon]

systemd_journal_logger::init_with_extra_fields() allows adding extra fields to every log message.

But is there a way to add extra fields to just individual log messages?

Perhaps something like: info!("Hello systemd journal"; "FOO" => "BAR");

[swsnr]

The logger writes structured log data to the journal. That's an unstable feature if the log crate, see the log crate's GitHub for details.

I don't know whether there's syntax support in the log macros already.

For more info please refer to the log crate for more information.

[nickbroon]

ah, thanks for the pointer.
I've found rust-lang/log#343 which tracks adding key/value pairs to the log crate macros.