MnMiddlewareGem

This gem provides some middleware for Mumsnet microservices.

CorrelationId checks https headers for the Amazon load balancer trace id and sets that as the request ID in rails if available. It also then ensures that request ID is included in every outgoing http call to other microservices so that the history of a request through all our systems can be traced easily.

RemoteIpLogger sets the correct remote IP in rails even when the request came via proxies or load balancers.

Installation

Add this line to your application's Gemfile:

gem 'mn_middleware_gem'

Usage

Add the following 2 lines near the top of your Rails.application.configure do block in both production.rb and development.rb:

  config.middleware.insert_after Rack::Runtime, MnMiddleware::CorrelationId
  config.middleware.insert_before Rails::Rack::Logger, MnMiddleware::RemoteIpLogger

Development

Run ./build_gem.sh to build this gem, run the rspec tests and get instructions on how to push it to rubygems.org