This option is used together with BUCKET_STORAGE_MULTIPLE_ENDPOINTS to allow users to configure buckets in multiple bucket services, for instance to migrate from hosted bucket storage to a local bucket storage service.

When BUCKET_STORAGE_MULTIPLE_ENDPOINTS is true, each bucket in global can have a separate endpoint configuration, which is defined in this AZURE_STORAGE_ENDPOINT_BASE variable (e.g., http://my-own-azure:8080).

This allows an existing cluster running against Azure to begin uploading segments to a self-hosted Azure by switching the endpoint base, while still keeping access to existing segments in Azure.

See BUCKET_STORAGE_MULTIPLE_ENDPOINTS and AZURE_STORAGE_ACCOUNTKEY for more information.