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dd lighthouse custom agent check

a google chrome lighthouse custom agent check for datadog

Overview

Get metrics from Google Chrome Lighthouse as a custom agent check in your Datadog app in real time to:

  • Visualize and monitor Lighthouse stats
  • Track and Audit scores for yours websites Accessibility, Best Practices, Performance, PWA, SEO, and more (eventually)

example lighthouse dashboard

Setup

At the moment this is just a Custom Agent Check for Datadog. It's not included in the Datadog Agent package.

Installation and Configuration

To install the Lighthouse Custom Agent Check on your host:

  1. Download the Datadog Agent
  2. Download the custom_lighthouse.py file for Lighthouse
  3. Place it in your Agent's checks.d directory (in Linux, this would be found in /etc/datadog-agent/checks.d/)
  4. Create a custom_lighthouse.yaml file in your Agent's conf.d directory (in Linux, this would be found in /etc/datadog-agent/conf.d/)
  5. Reference the example custom_lighthouse.yaml.example file in this repository and copy it's contents into the custom_lighthouse.yaml file just created.
  6. Edit the custom_lighthouse.yaml file for your use case (please note: This is a work in progress, it's unclear how resource intensive this can be, a typical lighthouse report takes about 5-10seconds to generate so it may be necessary to have a higher than usual minimum_collection_interval )
  7. Restart the agent

Requirements

Only tried this on Ubuntu so far.

  1. Check you have Node and NPM installed
node -v
npm -v

Lighthouse requires Node 8 LTS (8.9) or later.

If not, install Node and npm

  1. Install Lighthouse
npm install -g lighthouse
  1. Make sure Google Chrome is installed or Puppeteer (this custom agent check runs chrome in headless mode)
# example
vagrant@web2:~$ npm list -g --depth=0 | grep 'puppeteer'
└── [email protected]

If not, install Chrome or Puppeteer

npm install -g puppeteer

Validation

Run the Agent's status subcommand and look for custom_lighthouse under the Checks section.

Data Collected

Metrics

See metadata.csv for a list of metrics provided by this check.

Events

The Lighthouse custom agent check does not include any events.

Service Checks

The Light custom agent check does not include any service checks.

Troubleshooting

This is not production ready at this time, and not meant to be used in production at this time.