ZStack Cloud 5.2.0>Tutorials>Private Cloud>SharedBlock Deployment Tutorial (iSCSI)>Deploy a SharedBlock Primary Storage

Deploy a SharedBlock Primary Storage

Add raw devices.

Administrators need to partition raw devices (LUN devices) of a certain capacity on an iSCSI storage.

Figure 1. Add Raw Devices on an iSCSI Storage
Add an iSCSI storage.
You can add an iSCSI server on the ZStack Cloud UI with no need to configure each host manually. After you added an iSCSI server, the Cloud will automatically scan and detect disks for you.
Set the following parameters:
- Name: Enter the name of the iSCSI storage.
- IP Address: Set the IP address of the iSCSI storage.
- Port: Set the port of the iSCSI storage. Default port: 3260.
- Cluster: Optional. Select a cluster. You can also attach a cluster after you add the iSCSI storage.
  Note: Before adding a SharedBlock primary storage using block devices of an iSCSI storage, ensure that the iSCSI storage is attached to the same cluster.
- CHAP Username: Optional. Enter the CHAP username if the iSCSI storage has CHAP authentication configured.
- CHAP Password: Optional. Enter the CHAP password if the iSCSI storage has CHAP authentication configured.
Figure 2. Add iSCSI Storage
Add a primary storage.
Set the following parameters:
- Zone: By default, the current zone is displayed.
- Name: Enter a name for the primary storage.
- Description: Enter a description for the primary storage.
- Type: Select SharedBlock Storage.
- Default Storage Space Allocation Strategy: Select a storage space allocation strategy, including thick provisioning and thin provisioning.
  - Thick Provisioning: Allocates the required storage space in advance to provide sufficient storage capacities and to ensure storage performance.
  - Thin Provisioning: Allocates storage spaces as needed to achieve a higher storage utilization.
- Storage Network: Enter the storage network specified for the shared storage. The storage network can be the management network of the management node.
  Note:
  
  If you have a dedicated storage network, enter its CIDR.
  
  We recommend that you plan an independent storage network in advance to avoid potential risks. If you do not have an independent storage network, enter the network address according to your actual needs.
  
  The Cloud uses the storage network to check the health status of VM instances.
- Cluster: Select a cluster to which the SharedBlock primary storage is attached.
- LUN: Select one or more LUN devices of an iSCSI storage as needed.
  Note:
  
  Make sure that the compute node is properly connected with the storage and added to the Cloud.
  
  To make block devices on an iSCSI storage available to choose from, you need to first attach it to the same cluster of the SharedBlock primary storage. Make sure the SharedBlock primary storage and its associated iSCSI storage stay in the same cluster at all times during use.
- Cleanse LUN: Optional. Determine whether to cleanse LUN devices. By default, LUN devices are not cleansed.
  Note:
  
  If you choose to cleanse LUN devices, the residual data, such as file systems, RAID, or signatures of partition tables in the LUN devices will be forced to clean up.
  
  If data exists in your LUN devices, and you do not cleanse the devices, you will fail to add LUN devices or attach primary storage.
  
  The LUN devices to be added cannot have partitions. Otherwise, you will fail to add the devices.
Figure 3. Add SharedBlock Primary Storage

Next Chapter: Operational Management

Deploy a SharedBlock Primary Storage

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