Migrate from Drupal 7 to Drupal 10

Upgrading from Drupal 7 to Drupal 10 is a significant undertaking that involves multiple phases and considerations. The process you've outlined is comprehensive and covers various aspects of the upgrade. Here's a breakdown of the key steps and considerations involved:

Future Planning / Architecture Review:

Assess the current state of your Drupal application and identify areas for improvement and modernization.

Plan for editorial efficiencies, technical debt reduction, and frontend framework modernization.

Drupal Content Migration:

Update deprecated PHP code to be compatible with PHP 8.x, which is required for Drupal 9/10.

Review and update custom modules and contributed modules to ensure compatibility with the latest Drupal version.

Frontend Theme Rebuild:

Rebuild frontend templates, components, and themes using Drupal 9/10's modern frontend framework.

Manually rewrite theme templates, especially if you're transitioning from PHP templates to Twig templates.

Prelaunch Checklist:

Follow a prelaunch checklist to ensure your upgraded site meets security, performance, and functionality standards.

Consider hiring professional services for security and performance audits.

Production Launch:

Deploy your new Drupal 9/10 site to production through code deployment or DNS changes.

Ongoing Development and Security Updates with DevOps:

Consider implementing DevOps practices to automate deployment, testing, and security updates.

Explore tools like Acquia Code Studio for managed CI/CD pipelines and automatic updates.

To prepare for the upgrade, here are some immediate actions you can take:

Install Upgrade Status Module:

Use the Upgrade Status module to assess the readiness of your Drupal 7 site for the upgrade to Drupal 10.

Audit Content and Text Formats:

Review content types and text formats, and remove any PHP or code embedded in fields.

Flag or remove such content before the upgrade.

Audit Views:

Assess your existing Views and determine which ones are essential. Consider rebuilding or migrating Views to Drupal 9/10.

Review Custom Code for PHP Compatibility:

Use tools like PHPCompatibility to identify deprecated or incompatible code in your custom modules.

Leverage tools like the Drupal 7 to 8/9 Module Upgrader for automated assistance.

Upgrade D7 Projects and Address Known Issues:

Ensure that all your Drupal 7 projects are up to date with the latest versions.

Review and address any known upgrade issues specific to your modules.

Review Frontend Elements:

Prepare to rebuild frontend elements using Drupal 9/10's frontend framework (e.g., Twig templates).

Remember that this process is complex and time-consuming. It's recommended to work closely with experienced Drupal developers, as well as to thoroughly test the upgraded site before its production launch to ensure a smooth transition and a stable, secure website in Drupal 10.