Help Center> Elastic Volume Service> API Reference> Cinder API> Disk Management> Creating EVS Disks

Updated on 2024-02-27 GMT+08:00

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Creating EVS Disks

Function

This API is used to create EVS disks.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/volumes

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	The project ID. For details about how to obtain the project ID, see Obtaining a Project ID.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	The user token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
volume	Yes	CinderCreateVolumeOption object	The information of the disk to be created. Note: Specifying any two of the source_volid, snapshot_id, and imageRef fields together is not supported.
OS-SCH-HNT:scheduler_hints	No	CinderCreateVolumeSchedulerHints object	The scheduling parameter. The dedicated_storage_id field is supported, indicating that disks can be created in DSS storage pools.

**Table 4** CinderCreateVolumeOption
Parameter	Mandatory	Type	Description
availability_zone	Yes	String	The AZ where you want to create the disk. If the specified AZ does not exist or is different from the AZ to which the backup belongs, the disk will fail to be created.
consistencygroup_id	No	String	The ID of the consistency group. If this parameter is specified, the disk belongs to this consistency group. This function is currently not available.
description	No	String	The disk description. You can enter up to 85 characters.
imageRef	No	String	The image ID. If this parameter is specified, the disk is created from an image. NOTE: Bare Metal Server (BMS) system disks cannot be created from BMS images. For details about how to obtain the image ID, see Querying Images.
metadata	No	VolumeMetadata object	The disk metadata. The length of key or value under metadata can contain no more than 255 bytes. The metadata field only shows some parameters. You can specify other parameters based on your requirements. value of a key-value pair in metadata cannot be null.
multiattach	No	Boolean	Whether the disk is shareable. The default value is false. true: The disk is shareable. false: The disk is not shareable. For details, see Shared EVS Disks and Usage Instructions.
name	No	String	The disk name. You can enter up to 64 characters.
size	No	Integer	The disk size, in GiB. The restrictions are as follows: System disk: 1 GiB to 1,024 GiB Data disk: 10 GiB to 32,768 GiB This parameter is mandatory when you create an empty disk. If you create the disk from a snapshot, this parameter is mandatory, and the disk size must be greater than or equal to the snapshot size. If you create the disk from an image, this parameter is mandatory, and the disk size must be greater than or equal to the minimum capacity required by the min_disk image attribute.
snapshot_id	No	String	The snapshot ID. If this parameter is specified, the disk is created from a snapshot.
source_replica	No	String	This parameter indicates that the disk is cloned from another disk. This function is currently not available.
source_volid	No	String	The source disk ID. If this parameter is specified, the disk is cloned from an existing disk. This function is currently not supported.
volume_type	Yes	String	The disk type. The value can be SATA, SAS, GPSSD, SSD, ESSD, GPSSD2, or ESSD2. SATA: the common I/O type SAS: the high I/O type GPSSD: the general purpose SSD type SSD: the ultra-high I/O type ESSD: the extreme SSD type GPSSD2: the general purpose SSD V2 type ESSD2: the extreme SSD V2 type If the specified disk type is not available in the AZ, the disk will fail to be created. NOTE: When you create a disk from a snapshot, ensure that the disk type of the new disk is consistent with that of the snapshot's source disk. For details about disk types, see Disk Types and Performance. Enumeration values: ESSD2 GPSSD2 ESSD SSD GPSSD SAS SATA
iops	No	Integer	The configured IOPS. This parameter is mandatory only when a general purpose SSD V2 or an extreme SSD V2 disk is created. NOTE: To learn the IOPS ranges of general purpose SSD V2 and extreme SSD V2 disks, see the EVS performance data table in Disk Types and Performance. Only pay-per-use billing is supported.
throughput	No	Integer	The configured throughput, in the unit of MiB/s. This parameter is mandatory only when a general purpose SSD V2 disk is created. NOTE: -To learn the throughput range of general purpose SSD V2 disks, see the EVS performance data table in Disk Types and Performance. Only pay-per-use billing is supported.

**Table 5** VolumeMetadata
Parameter	Mandatory	Type	Description
__system__cmkid	No	String	The encryption CMK ID in metadata. This parameter is used together with __system__encrypted for encryption. The length of cmkid is fixed at 36 bytes. NOTE: Use an HTTPS request to obtain the key ID. For details, see Querying the Key List.
__system__encrypted	No	String	The encryption field in metadata. The value can be 0 (no encryption) or 1 (encryption). If this parameter does not appear, the disk is not encrypted.
full_clone	No	String	If the disk is created from a snapshot and linked cloning needs to be used, set this parameter to 0.
hw:passthrough	No	String	If this parameter is set to true, the disk device type is SCSI, which allows ECS OSs to directly access the underlying storage media. SCSI reservation commands are supported. If this parameter is set to false, the disk device type is VBD, which is also the default type. VBD supports only simple SCSI read/write commands. If this parameter is not available, the disk device type is VBD.

**Table 6** CinderCreateVolumeSchedulerHints
Parameter	Mandatory	Type	Description
dedicated_storage_id	No	String	The dedicated storage pool ID.

Response Parameters

Status code: 202

**Table 7** Response body parameters
Parameter	Type	Description
volume	CreateVolumeDetail object	The created disk information.

**Table 8** CreateVolumeDetail
Parameter	Type	Description
id	String	The disk ID.
links	Array of Link objects	The disk URI.
name	String	The disk name.
status	String	The disk status. For details, see EVS Disk Status.
attachments	Array of VolumeAttachment objects	The attachment information.
availability_zone	String	The AZ to which the disk belongs.
bootable	String	Whether the disk is bootable. true: The disk is bootable. false: The disk is not bootable.
encrypted	Boolean	This field is currently not supported.
created_at	String	The time when the disk was created. Time format: UTC YYYY-MM-DDTHH:MM:SS.XXXXXX
description	String	The disk description.
volume_type	String	The disk type. The value can be SATA, SAS, GPSSD, SSD, ESSD, GPSSD2, or ESSD2. SATA: the common I/O type SAS: the high I/O type GPSSD: the general purpose SSD type SSD: the ultra-high I/O type ESSD: the extreme SSD type GPSSD2: the general purpose SSD V2 type ESSD2: the extreme SSD V2 type If the specified disk type is not available in the AZ, the disk will fail to be created.
replication_status	String	The reserved field.
consistencygroup_id	String	The ID of the consistency group where the disk belongs.
source_volid	String	The source disk ID. This field is currently not supported.
snapshot_id	String	The snapshot ID.
metadata	VolumeMetadata object	The metadata.
size	Integer	The disk size, in GiB.
user_id	String	The ID of the user that uses the disk.
updated_at	String	The time when the disk was updated.
shareable	Boolean	Whether the disk is shareable. Note: This field has been deprecated. Use multiattach.
multiattach	Boolean	Whether the disk is shareable. true: The disk is shareable. false: The disk is not shareable.
storage_cluster_id	String	The reserved field.

**Table 9** Link
Parameter	Type	Description
href	String	The corresponding shortcut link.
rel	String	The shortcut link marker name. Default: next

**Table 10** VolumeAttachment
Parameter	Type	Description
attached_at	String	The time when the disk was attached. Time format: UTC YYYY-MM-DDTHH:MM:SS.XXXXXX
attachment_id	String	The attachment ID.
device	String	The device name.
host_name	String	The name of the physical host housing the cloud server to which the disk is attached.
id	String	The ID of the attached disk.
server_id	String	The ID of the server to which the disk is attached.
volume_id	String	The disk ID.

**Table 11** VolumeMetadata
Parameter	Type	Description
__system__cmkid	String	The encryption CMK ID in metadata. This parameter is used together with __system__encrypted for encryption. The length of cmkid is fixed at 36 bytes. NOTE: Use an HTTPS request to obtain the key ID. For details, see Querying the Key List.
__system__encrypted	String	The encryption field in metadata. The value can be 0 (no encryption) or 1 (encryption). If this parameter does not appear, the disk is not encrypted.
full_clone	String	If the disk is created from a snapshot and linked cloning needs to be used, set this parameter to 0.
hw:passthrough	String	If this parameter is set to true, the disk device type is SCSI, which allows ECS OSs to directly access the underlying storage media. SCSI reservation commands are supported. If this parameter is set to false, the disk device type is VBD, which is also the default type. VBD supports only simple SCSI read/write commands. If this parameter is not available, the disk device type is VBD.

Status code: 400

**Table 12** Response body parameters
Parameter	Type	Description
error	Error object	The error message returned if an error occurs.

**Table 13** Error
Parameter	Type	Description
code	String	The error code returned if an error occurs. For details about error codes and their meanings, see Error Codes.
message	String	The error message returned if an error occurs.

Example Requests

Creating an EVS disk (Use an image to create a non-shared EVS disk in the DSS storage pool. Set the disk type to common I/O, device type to SCSI, and disk size to 40 GiB.)

POST https://{endpoint}/v2/{project_id}/volumes

{
  "volume" : {
    "name" : "openapi_vol01",
    "imageRef" : "027cf713-45a6-45f0-ac1b-0ccc57ac12e2",
    "availability_zone" : "xxx",
    "description" : "create for api test",
    "volume_type" : "SATA",
    "metadata" : {
      "hw:passthrough" : "true"
    },
    "consistencygroup_id" : null,
    "source_volid" : null,
    "snapshot_id" : null,
    "multiattach" : false,
    "source_replica" : null,
    "size" : 40
  },
  "OS-SCH-HNT:scheduler_hints" : {
    "dedicated_storage_id" : "eddc1a3e-4145-45be-98d7-bf6f65af9767"
  }
}

Example Responses

Status code: 202

Accepted

{
  "volume" : {
    "attachments" : [ ],
    "availability_zone" : "xxx",
    "bootable" : "false",
    "created_at" : "2016-05-25T02:38:40.392463",
    "description" : "create for api test",
    "encrypted" : false,
    "id" : "8dd7c486-8e9f-49fe-bceb-26aa7e312b66",
    "links" : [ {
      "href" : "https://volume.localdomain.com:8776/v2/5dd0b0056f3d47b6ab4121667d35621a/volumes/8dd7c486-8e9f-49fe-bceb-26aa7e312b66",
      "rel" : "self"
    }, {
      "href" : "https://volume.localdomain.com:8776/5dd0b0056f3d47b6ab4121667d35621a/volumes/8dd7c486-8e9f-49fe-bceb-26aa7e312b66",
      "rel" : "bookmark"
    } ],
    "metadata" : {
      "__system__encrypted" : 0
    },
    "name" : "openapi_vol01",
    "replication_status" : "disabled",
    "multiattach" : false,
    "size" : 40,
    "status" : "creating",
    "user_id" : "39f6696ae23740708d0f358a253c2637",
    "volume_type" : "SATA"
  }
}

Status code: 400

Bad Request

{
  "error" : {
    "message" : "XXXX",
    "code" : "XXX"
  }
}

Status Codes

Status Code	Description
202	Accepted
400	Bad Request

Error Codes

See Error Codes.

Parent Topic: Disk Management

Previous topic: Disk Management

Next topic: Deleting an EVS Disk

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