Introduction

A New Relic agent to collect status information from phusion passenger via the xml output of the passenger-status command

NOTE!!! Currently written to support passenger 4, parsing may not work correctly with passenger 3 outputs

Passenger Agent Installation

1. Download the latest version
2. Extract to the location you want to run the agent from
3. bundle install to get the necessary gems
4. Copy config/template_newrelic_plugin.yml to config/newrelic_plugin.yml
5. Edit config/newrelic_plugin.yml and replace "YOUR_LICENSE_KEY_HERE" with your New Relic license key
6. Edit config/newrelic_plugin.yml and add the full path to your 'passenger-status --show=xml' and 'free -m' commands if needed, as well as the hostname (as you want it to appear in NewRelic)
7. Run ./newrelic_passenger_agent

Data Collected

Data for this agent is collected by running the commands 'passenger-status --show=xml' and 'free -m' then parsing the results

Data captured for => passenger-status --show=xml

• of processes running (max and current)

• waiting in queue

• total sessions active
• total cpu usage
• memory usage by process

Data captured for => free -m

• Total memory
• Memory used (all)
• Memory free (all)
• shared memory
• allocated to buffers
• cached
• memory used by applications
• memory available to applications
• total swap
• swap used
• swap free
• % Memory free (for summary metrics page)

Other Sources

This agent originally based on the passenger agent by tamaloa https://github.com/tamaloa/newrelic_passenger_plugin