puma-plugin-telemetry (rubygems): Puma plugin which should be able to handle all your metric needs regarding your webserver:  - ability to publish basic puma statistics (like queue backlog) to both logs and datadog - ability to add custom target whenever you need it - ability to monitor puma socket listen queue (!) - ability to report requests queue time via custom rack middleware - the time request spent between being accepted by Load Balancer and start of its processing by Puma worker 
Keywords: gem|library|rack|ruby