# Docker Registry Microsoft Azure Blob Storage Driver
An implementation of the `storagedriver.StorageDriver` interface which uses [Microsoft Azure Blob Storage][azure-blob-storage] for object storage.
## Parameters
The following parameters must be used to authenticate and configure the storage driver (case-sensitive):
*`accountname`: Name of the Azure Storage Account.
*`accountkey`: Primary or Secondary Key for the Storage Account.
*`container`: Name of the root storage container in which all registry data will be stored. Must comply the storage container name [requirements][create-container-api].
*`realm`: (optional) Domain name suffix for the Storage Service API endpoint. Defaults to `core.windows.net`. For example realm for "Azure in China" would be `core.chinacloudapi.cn` and realm for "Azure Government" would be `core.usgovcloudapi.net`.
