custom_instrumentation_statsd

🚀 Custom Flipper Instrumentation for Real-time Metrics

You can swap Flipper's default instrumenter to push gate evaluation events to external systems like StatsD, enabling real-time monitoring and alerting. By injecting a custom lambda or Proc into config.instrumenter, you capture each gate evaluation along with metadata and duration, sending metrics with tags for deeper analytics. This approach scales in distributed environments and integrates with existing observability stacks.

# config/initializers/flipper.rb
require 'statsd'

statsd = Statsd.new('statsd.myhost', 8125)

Flipper.configure do |config|
  config.adapter { Flipper::Adapters::Redis.new(Redis.new) }

  config.instrumenter = lambda do |event_name, duration, payload|
    feature = payload[:feature_name]
    result  = payload[:result]
    statsd.increment('flipper.gate.%s' % event_name, tags: ['feature:%s' % feature, 'result:%s' % result])
    statsd.timing('flipper.gate.%s.duration' % event_name, duration, tags: ['feature:%s' % feature])
  end
end