anchor.diff:  library. Not all link:https://docs.docker.com/registry/configuration/[configuration options]
   are supported or enabled. Use this section as a reference.
   
  -[TIP]
  -Upstream configuration options in this file may also be overridden using environment
  -variables. However, the link:#middleware[middleware section] may **not** be
  -overridden using environment variables. See upstream documentation on how to
  -link:https://docs.docker.com/registry/configuration/#override-specific-configuration-options[override specific configuration options].
  -
  +[NOTE]
  +====
  +Upstream configuration options in this file may also be overridden using
  +environment variables. However, the
  +link:#docker-registry-configuration-reference-middleware[middleware section] may
  +*not* be overridden using environment variables.
  +link:https://docs.docker.com/registry/configuration/#override-specific-configuration-options[Learn
  +how to override specific configuration options].
  +====
  +
  +[[docker-registry-configuration-reference-log]]
   ==== log
   
  -link:https://docs.docker.com/registry/configuration/#log[Upstream options] supported.
  +link:https://docs.docker.com/registry/configuration/#log[Upstream options] are supported.
  +
   Example:
   
   ====
  
positive.code: ----
  ====
  
  The **cloudfront** link:https://docs.docker.com/registry/configuration/#cloudfront[middleware extension]
  may be added to support AWS CloudFront CDN storage provider.
  
  ==== reporting
  
  Unsupported
  
  ==== http
  
  While link:https://docs.docker.com/registry/configuration/#http[Upstream options]
  are supported, see link:#securing-the-registry[securing the registry] for
  altering these settings via environment variables. Only the **tls** section
  should be altered, provided below for reference only:
  
  ====
  ----
  
negative.code: ----
  ====
  
  [[docker-registry-configuration-reference-hooks]]
  ==== hooks
  
  Mail hooks are not supported.
  
  [[docker-registry-configuration-reference-storage]]
  ==== storage
  
  The following link:https://docs.docker.com/registry/configuration/#storage[storage drivers]
  are supported:
  
  *  link:https://docs.docker.com/registry/storage-drivers/filesystem[Filesystem]
  *  link:https://docs.docker.com/registry/storage-drivers/azure/[Microsoft Azure]
  *  link:https://docs.docker.com/registry/storage-drivers/s3/[S3]
  +
  link:#docker-registry-configuration-reference-middleware[Learn more about CloudFront configuration].
  
  * link:https://docs.docker.com/registry/storage-drivers/swift/[OpenStack Swift]
  
  link:https://docs.docker.com/registry/configuration/#maintenance[General registry storage configuration options] are supported.
  
  
  .General Storage Configuration Options
  ====
  ----
  storage:
  