2.2. Database backend

The Red Hat Quay database backend stores registry metadata such as users, organizations, images, and tags. PostgreSQL is the preferred database for Red Hat Quay and Clair.

Red Hat Quay stores all of its configuration information in the config.yaml file. Logs can be pushed to ElasticSearch and Splunk if required.

A future version of Red Hat Quay will remove support for using MySQL and MariaDB as the database backend, which has been deprecated since the Red Hat Quay 3.6 release. Until then, MySQL is still supported according to the support matrix, but will not receive additional features or explicit testing coverage. The Red Hat Quay Operator supports only PostgreSQL deployments when the database is managed. If you want to use MySQL, you must deploy it manually and set the database component to managed: false.

Deploying Red Hat Quay in a highly available (HA) configuration requires that your database services are provisioned for high availability. If Red Hat Quay is running on public cloud infrastructure, it is recommended that you use the PostgreSQL services provided by your cloud provider, however MySQL is also supported.

Geo-replication requires a single, shared database that is accessible from all regions.