Hi there,
i hope this is a simple question and i just can't find it in the documentation:
I have several fields, that i'd adress by [fields][something] in logstash.
Now i want to write an email-alert (with output email) and would like to put the content of those fields into the subject of that mails.
Now that subject-field accepts a string like add_fields does aswell, but if i do something like
subject => "%{fields.env} %{fields.loglevel} %{agent.hostname} %{log.file.path}"
it does not replace those tags.
How would i adress those fields?