Before you can add access to a LUN over iSCSI, you must add a LUN to the block virtual disk, and you must also map the LUN to a Hedvig Storage Proxy (when running a hypervisor) or to Docker (when running on bare-metal Linux).
For an object storage operation, creating an OpenStack Swift container — or an Amazon S3 bucket via API — automatically creates an object-based virtual disk on the Hedvig Storage Cluster, and the virtual disk is automatically mapped to the compute instance.