Cached images are not loaded after 2.2.X to 2.3.X upgrade

This article provides the solution for the issue with cached images not being displayed after upgrading from Magento Commerce Cloud 2.2.X to 2.3.X.

Affected versions and editions:

• Magento Commerce Cloud 2.2.X, 2.3.X, Pro Plan

Issue

After Magento is upgraded from 2.2.X to 2.3.X, the cached product images are not available, a 404 page is displayed instead.

The issue is caused by the incorrect Nginx configuration set in .magento.app.yaml: index.php (or none) is used for the "/media" location instead of passthru: /get.php.

Solution

1. Check your .magento.app.yaml configuration file, at the "/media" location. The correct configuration looks like following:
   

   "/media":
       root: "pub/media"
       allow: true
       scripts: false
       expires: 1y
       passthru: "/get.php"
   

2. If passthru is not set to "/get.php" and expires is not set, take the following steps.
3. Correct the configuration file.
   • Starter Plan: correct the file yourself and push the changes.
   • Pro Plan:
     • Integration: correct the file yourself and push the changes.
     • Staging and Production: correct the file yourself, push the changes, and create a Magento Support ticket to have it applied.
4. Enable Fastly image optimization in the Magento Admin (Fastly must be configured prior), as described in https://devdocs.magento.com/guides/v2.3/cloud/cdn/fastly-image-optimization.html

If the configuration is correct, but you are still experiencing the issue, continue investigation or contact Magento Support.