• What is gander?
• Prerequisites?
• Getting started?

Gander is a preconfigured Open Telemetry stack relying on Prometheus, Grafana, and Grafana Tempo.

For DDEV v1.23.5 or above run

ddev add-on get tag1consulting/ddev-gander

For earlier versions of DDEV run

ddev get tag1consulting/ddev-gander

Then run Drupal core's OpenTelemetry phpunit tests, and immediately see performance metrics and traces in a Grafana dashboard. Or add PerformanceTestBase coverage to an existing project with a few lines of code if you already have phpunit functional test coverage of your project.

For more information on the phpunit side of things, see the Drupal core change record.

• Install ddev if you haven't already.
• Enable ddev on your local Drupal project.
• ddev get ddev/ddev-selenium-standalone-chrome to enable functional Javascript tests for DDEV. (ddev/ddev-selenium-standalone-chrome is a dependency of this add-on.)

Add Gander and run Drupal's performance tests via a git clone of Drupal core (assuming composer is used):

• ddev get tag1consulting/ddev-gander
• ddev restart
• ddev ssh
• cd web/
• To run a single test: phpunit -c core profiles/demo_umami/tests/src/FunctionalJavascript/OpenTelemetryNodePagePerformanceTest.php
• To run all Gander tests: phpunit -c core --group OpenTelemetry
• Check the Grafana dashboard via: http://<projectname>.ddev.site:3000/