Disk Offering

Overview

A disk offering is a specification of a volume, which defines the size of a volume and how the volume will be created.

Disk offerings can be used to create both root volumes and data volumes.

Inventory

Properties

Name	Description	Optional	Optional Value	Starting Version
uuid	The UUID. For more information, see Resource Property.			0.6
name	The name. For more information, see Resource Property.			0.6
description	The description. For more information, see Resource Property.	Yes		0.6
diskSize	The disk size. Unit: byte. For more information, see Disk Size.			0.6
state	The state. For more information, see State.		Enabled Disabled	0.6
type	The reserved field.		zstack	0.6
allocatorStrategy	The allocator strategy. For more information, see Allocator Strategy.		DefaultHostAllocatorStrategy LastHostPreferredAllocatorStrategy LeastVmPreferredHostAllocatorStrategy MinimumCPUUsageHostAllocatorStrategy MinimumMemoryUsageHostAllocatorStrategy MaxInstancePerHostHostAllocatorStrategy	0.6
sortKey				0.6
createDate	The creation date. For more information, see Resource Property.			0.6
lastOpDate	The last operation date. For more information, see Resource Property.			0.6

Sample

{     "inventories": [         {             "allocatorStrategy": "DefaultPrimaryStorageAllocationStrategy",             "createDate": "Oct 30, 2017 3:09:45 PM",             "description": "",             "diskSize": 10737418240,             "lastOpDate": "Oct 30, 2017 3:09:45 PM",             "name": "10G",             "sortKey": 0,             "state": "Enabled",             "type": "DefaultDiskOfferingType",             "uuid": "6c2385bb60f84c269504ca6ea71fe2d1"         }     ],     "success": true }

Disk Size

DiskSize defines the virtual size of a volume. Virtual size is the size that a volume claims for. In other word, the virtual size is the maximum size that a volume can occupy in storage system after it is fully filled.

State

A disk offering has the following two states:

Enabled:
Indicates that volumes can be created from this disk offering.
Disabled:
Indicates that volumes cannot be created from this disk offering.

Allocator Strategy

Allocator strategy defines how ZStack selects a primary storage when creating a new volume. Currently, the only supported strategy is DefaultPrimaryStorageAllocationStrategy, which finds a primary storage according to the following conditions:

1. The state is Enabled. 2. The status is Connected. 3. The available capacity (availableCapacity) is greater than the disk size (diskSize) of the disk offering. 4. The primary storage is attached to the cluster that runs the VM instance to which the volume will be attached.

Disk Offering

Overview

Inventory

Properties

Sample

Disk Size

State

Allocator Strategy

Operations

Products

Solutions

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