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noahd1 / oink

Log parser to identify actions which significantly increase VM heap size
MIT License
1.18k stars 71 forks source link

Allow logging of specified environment variables. #48

Open unixmonkey opened 6 years ago

unixmonkey commented 6 years ago

This PR allows users to log extra environment information to the oink.log, if environment keys are specified.

If an optional env_vars array is passed to the middleware, the logs will have an additional Environment: line with specified environment keys and values:

Rails.application.middleware.use( Oink::Middleware, env_vars: ['action_dispatch.request_id'] )
Jan 29 18:28:39 vocalhost rails[74025]: Oink Action: home#show
Jan 29 18:28:39 vocalhost rails[74025]: Environment: {"action_dispatch.request_id": "4cc822f8-0d85-4d80-bcae-d94a4567e06c"}
Jan 29 18:28:39 vocalhost rails[74025]: Memory usage: 4825792 | PID: 74025
Jan 29 18:28:39 vocalhost rails[74025]: Instantiation Breakdown: Total: 2 | Page: 1 | User: 1
Jan 29 18:28:39 vocalhost rails[74025]: Oink Log Entry Complete

This is especially useful for logging the request ID, since logs may be distributed among multiple app servers, and timestamps don't always line up exactly.