Overview

A zone is a logical group of resources such as clusters, L2 networks, and primary storages. Zone is the largest resource scope defined in ZStack Cloud.

When you organize a zone, note that:
  1. Hosts in the same physical layer 2 broadcast domain must be in the same zone. These hosts can be grouped as one or more clusters.
  2. A physical layer 2 broadcast domain cannot span multiple zones. Instead, it must be mapped as an L2 network in a single zone.
  3. A primary storage cannot span multiple zones. Instead, it should be mapped as the primary storage in a single zone.
  4. A data center can have multiple zones.
  5. A zone can have one or more backup storages attached.
    • Resources in a zone, such as a primary storage, can only access the backup storage that is attached to the zone.
    • A backup storage can be detached from a zone. After the backup storage is detached, resources in the zone will not see the backup storage any more.
    • If a backup storage is no longer accessible to resources of a zone due to network typology changes in a data center, you can detach the backup storage from this zone.