I do not quite get what is the problem here. Erlang’s logger allows to use structured logging, so instead of (in Elixir syntax) doing Logger.info("Responded HTTP 200 in #{time}") you can do: Logger.info(%{http_response: 200, http_response_time: time}) and at the same time provide more information in metadata. This allows to eat cookie and have cookie because:
- you can programmatically get meaningful data without processing text
- you still can insert metadata (that aren’t part of the log message) into metadata
Grafana describes difference quite nicely, so you can see that in most (all?) cases metrics can be extracted from logs. Of course some of these logs will need to be discarded to not needlessly increase logs volume, but that can be done quite easily later.
