App Engine Flexible Environment Java to Use Cloud SQL Auth Proxy v2 by August 2026
Google App Engine flexible environment for Java will transition to using Cloud SQL Auth Proxy v2 as its built-in sidecar container for Cloud SQL connections. This change, mandatory by August 2026, aims to deliver modern security patches and support for MySQL 8.4 and later versions. Developers can adopt the latest Cloud SQL Auth Proxy immediately by restarting their VMs or deploying a new application version. This update primarily affects App Engine flexible environment Java users connecting to Cloud SQL.
Features (1) ›
- App Engine flexible environment Java
Starting from August 2026, to provide modern security patches and support for MySQL 8.4 and later, the App Engine flexible environment uses Cloud SQL Auth Proxy v2 as the built-in sidecar container for connections to Cloud SQL. To use the latest Cloud SQL Auth Proxy container immediately, restart your VMs or deploy a new version of your application.
https://docs.cloud.google.com/release-notes#August_20_2026
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