Tool to gather lighthouse metrics and supports CRON jobs and webhooks.

Highlights

• Poll for lighthouse performance metrics on any website and stores the data into InfluxDB
• Webhook support
• Understand your performance metrics with recommend improvements thanks to lighthouse reports
• View all historic lighthouse reports.
• Setup within minutes

Overview of garie-lighthouse

Garie-lighthouse was developed as a plugin for the Garie Architecture.

Garie is an out the box web performance toolkit, and garie-lighthouse is a plugin that generates and stores lighthouse data into InfluxDB.

Garie-lighthouse can also be run outside the Garie environment and run as standalone.

If your interested in an out the box solution that supports multiple performance tools like lighthouse, google-speed-insight and web-page-test then checkout Garie.

If you want to run garie-lighthouse standalone you can find out how below.

Getting Started

Prerequisites

• Docker installed

Running garie-lighthouse

You can get setup with the basics in a few minutes.

First clone the repo.

git clone [email protected]:boyney123/garie-lighthouse.git

Next setup you're config. Edit the config.json and add websites to the list.

{
	"cron": "00 00 */6 * * *",
	"urls": [
		{
			"url": "https://www.comparethemarket.com",
			"report": true
		},
		{
			"url": "https://www.bbc.co.uk",
			"report": true
		},
		{
			"url": "https://www.cnn.com",
			"report": true
		}
	]
}

Once you finished edited your config, lets build our docker image and setup our environment.

docker build -t garie-lighthouse . && docker-compose up

This will build your copy of garie-lighthouse and run the application.

On start garie-lighthouse will start to gather performance metrics for the websites added to the config.json.

Data collected

Lighthouse comes with loads of audits out the box. You can view all metrics in the reports.

Garie-lighthouse filters what data is stored into influxDB and returned in the webhook.

Property	Type	Description
performance-score	number	Overall performance score.
pwa-score	number	Overall progressive web app score.
accessibility-score	number	Overall accessibility score.
best-practices-score	number	Overall best practices score.
seo-score	number	Overall seo score.
time-to-first-byte	number	Number of ms to first byte.
firstContentfulPaint	number	Number of ms to first contentful paint.
firstMeaningfulPaint	number	Number of ms to first meaningful paint.
interactive	number	Number of ms to interactive.
firstCPUIdle	number	Number of ms to CPU idle.
speedIndex	number	Google speed index.
estimatedInputLatency	number	Input Latency.
errors-in-console	number	Number of errors in the console.
redirects	number	Number of redirects.
redirects	number	Number of redirects.

Viewing reports

Viewing lighthouse reports is straight forward. Once you have your application running just go to localhost:3000/reports and you should see all the reports lighthouse has generated.

If you don't want to generate reports you can turn this off in the config.json by setting report to false.

Webhook

Garie-lighthouse also supports webhooks. You will need to POST to localhost:3000/collect.

Payload

Property	Type	Description
url	string (required)	Url to get metrics for.
report	boolean (optional)	When set to true a lighthouse report will be generated

Payload Example

{
  "url": "https://www.bbc.co.uk",
  "report": true
}

By default, reports on webhook's are not generated unless you set report to true

config.json

Property	Type	Description
cron	string (optional)	Cron timer. Supports syntax can be found [here].(https://www.npmjs.com/package/cron)
urls	object (required)	Config for lighthouse. More detail below

urls object

Property	Type	Description
url	string (required)	Url to get lighthouse metrics for.
plugins	object (optional)	To setup custom lighthouse config.
plugins.name	string (required)	Needs to be set to lighthouse
plugins.report	boolean (optional)	If set to true, lighthouse report will also be generated.
plugins.config	object (optional)	To configure lighthouse, such as device type and throttling. See Configuration for details.

Example (Basic Config)

{
	"url": "https://www.bbc.co.uk",
	"plugins": [
		{
			"name": "lighthouse",
			"report": true
		}
	]
}

Example (Custom Config)

{
	"url": "https://www.bbc.co.uk",
	"plugins": [
		{
			"name": "lighthouse",
			"report": true,
			"config": {
				"extends": "lighthouse:default",
				"settings": {
					"emulatedFormFactor": "desktop"
				}
			}
		}
	]
}