Sidekiq: Add support for log stash lograge-style

[iMacTia]

I'm in the process of setting up the ELK stack for all our applications to manage log aggregation.
Lograge has been extremely useful to compress rails multi-line log into a single-line JSON log.
It would be great to have the same for Sidekiq, so I'm here asking if there's anything already in place (a setting, a plugin, ...) which will do the job.
If that's not the case, what's the preferred course of actions in this case?

1. I write an extension/ monkey-patch sidekiq on my application (suggestions would be welcome in this case)
2. I try to implement and issue a pull request to make it available for everyone (again, direction/suggestions really welcome)
3. You already know how to do it, so I just wait 😄

Thanks,

Mattia

[mperham]

Sidekiq.configure_server do |config|
  config.logger.formatter = LogrageFormatter.new
end

Now you provide LogrageFormatter based on the default formatter. I'm not aware of an existing plugin but you are welcome to OSS your solution.

[iMacTia]

Many thanks, I'll work on it based on the 'default formatter'.
Would you prefer this to be implemented as an additional formatter inside sidekiq gem (PR) or as a standalone plugin-gem?

[mperham]

Standalone. It's small enough that someone can put it in an initializer and customize as necessary.

[iMacTia]

As promised: https://github.com/iMacTia/sidekiq-logstash
It's still a WIP and I would like to make it customisable based on input from other developers.
@mperham, I know you're a busy man, but your input would be really much appreciated :)

[mperham]

I have no real input but thanks for publishing it; I hope it works well for you and your users.