Add the following gems to your
gem 'activeresource' gem 'newrelic_api'
Update your bundle:
jobs/newrelic_rpm.rb and configure your API key and Application name.
Finally, choose a metric (see "Emitted metrics"
jobs/newrelic_rpm.rb) you want to show on the dashboard and add corresponding HTML code. For example, the code below shows Newrelic Throughput (requests/minute) on the scale of 100. Adjust the scale based on your application usage.