Hardware

The hardware resource mainly is configuration information associated with a physical hardware environment. The hardware resource on the cloud mainly includes:

Zone: The largest resource definition in ZStack, including cluster, L2 network, primary storage, and other resources. Generally, a zone corresponds to an equipment room of a data center.
Cluster: A logical group of hosts (compute nodes). Generally, a cluster corresponds to a rack.
Host: A host that provides compute, network, and storage resources for VM instances.
Primary storage: A storage server used to store VM disk files (including root volume, disk volume, snapshot, and image cache). The supported primary storage types include LocalStorage, NFS, Shared Mount Point, Ceph, and Shared Block.
Backup storage: A storage server used to store VM image templates (including ISO). The supported backup storage types include ImageStore, SFTP (only for ZStack Community), and Ceph.
SAN storage: LUN devices that are virtually split on an iSCSI-SAN or FC-SAN storage. These devices can be passed through directly to VM instances or can be added as Shared Block primary storages.

Zone

Zone is the largest resource definition in ZStack, including cluster, L2 network, primary storage, and other resources.

In a data center, a zone corresponds to an equipment room.
A zone defines a visible boundary. Subresources within the same zone can be visible mutually and can form a certain relationship. However, subresources within different zones are invisible mutually and cannot form mutual relationships.
Resources in a zone is organized as follows, as shown in Zone Resource Structure.
Figure 1. Zone Resource Structure

When you organize a zone, note that:

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.
A physical layer 2 broadcast domain cannot span multiple zones. Instead, it must be mapped as an L2 network in a single zone.
A primary storage cannot span multiple zones. Instead, it should be mapped as the primary storage in a single zone.
A data center can have multiple zones.
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.
- To better manage the relationship between backup storages and zones, the UI specifies that a backup storage can only be attached to one zone at a time. That is, a backup storage that has been attached to a zone cannot be reattached to the other zone. When you add a backup storage in the UI, the backup storage will be automatically attached to the current zone. When you delete a zone, you will directly delete the backup storage attached to the zone.

Zone Management

In the navigation pane of the ZStack Private Cloud UI, choose Hardware > Zone. Then, the Zone management page is displayed.

As shown in Zone Management Page.

On the Zone management page, check the information of all zones on the cloud, including zone names and states.

On the Zone management page, perform the following operations:

Search: Quickly conduct searches for zones according to the zone name and UUID by clicking Search. In addition, you can conduct advanced searches. Specifically, the usages for both advanced search and QueryZone are identical. For more information about the usages, see the CLI Command Manual.
List count: Display the zone count for each page by clicking List Count.

Create Zone

On the Zone management page, click Create Zone. On the displayed Create Zone page, set the following parameters:

Name: Enter a name for the zone.
Description: Optional. Enter a description for the zone.

As shown in Create Zone.

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