RainCatcher utilises the raindrops statistics tool to automatically log queue data for Rack web servers (e.g. Unicorn) running Rails.
Add this line to your application's Gemfile:
gem 'rain_catcher', '~> 0.2.2'And rebuild your bundle:
bundle install
RainCatcher automatically adds a hook into all web requests made to your application controller which will make a new log entry not more frequently than a predetermined interval.
When each request is processed, if the configured interval has elapsed then a log entry will be made.
| Variable | Default Value | Meaning |
|---|---|---|
RAIN_CATCHER_LOG_INTERVAL |
30 | Minimum number of seconds between each log entry |
RAIN_CATCHER_LOG_LEVEL |
INFO | Log level to use for log entries |
RAIN_CATCHER_APPLICATION_NAME |
[inferred from Rails] | Application identifier which will be included in all log entries |
Log entries are output as JSON. For example:
{"active":5,"queued":2,"source":"rain_catcher","application":"myapp","environment":"production"}