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On this page

Elastic Volume Service (EVS)

Updated on 2025-02-25 GMT+08:00

The Organizations service provides Service Control Policies (SCPs) to set access control policies.

SCPs do not actually grant any permissions to a principal. They only set the permissions boundary for the principal. When SCPs are attached to a member account or an organizational unit (OU), they do not directly grant permissions to that member account or OU. Instead, the SCPs just determine what permissions are available for that member account or the member accounts under that OU.

This section describes the elements used by Organizations SCPs. The elements include actions, resources, and conditions.

For details about how to use these elements to create a custom SCP, see Creating an SCP.

Actions

Actions are specific operations that are allowed or denied in an SCP.

  • The Access Level column describes how the action is classified (List, Read, or Write). This classification helps you understand the level of access that an action grants when you use it in an SCP.
  • The Resource Type column indicates whether the action supports resource-level permissions.
    • You can use a wildcard (*) to indicate all resource types. If this column is empty (-), the action does not support resource-level permissions, and you must specify all resources ("*") in your SCP statements.
    • If this column includes a resource type, you must specify the URN in the Resource element of your statements.
    • Required resources are marked with asterisks (*) in the table. If you specify a resource in a statement using this action, then it must be of this type.

    For details about the resource types defined by EVS, see Resources.

  • The Condition Key column contains keys that you can specify in the Condition element of an SCP statement.
    • If the Resource Type column has values for an action, the condition key takes effect only for the listed resource types.
    • If the Resource Type column is empty (-) for an action, the condition key takes effect for all resources that action supports.
    • If the Condition Key column is empty (-) for an action, the action does not support any condition keys.

    For details about the condition keys defined by EVS, see Conditions.

The following table lists the actions that you can define in SCP statements for EVS.

Table 1 Actions supported by EVS

Action

Description

Access Level

Resource Type (*: required)

Condition Key

evs:volumes:create

Grants permission to create disks.

write

volume *

-

-

  • g:RequestTag/<tag-key>
  • g:TagKeys
  • g:EnterpriseProjectId
  • evs:Encrypted
  • cbr:VaultId

evs:volumes:list

Grants permission to list disks.

list

-

g:EnterpriseProjectId

evs:volumes:get

Grants permission to query disks.

read

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:delete

Grants permission to delete disks.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:update

Grants permission to update disks.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:resize

Grants permission to expand disk capacities.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:modifyQos

Grants permission to modify disk QoS configurations.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:revert

Grants permission to recover disks from the recycle bin.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:recycle_policy:get

Grants permission to query the recycle bin policy.

read

-

-

evs:recycle_policy:update

Grants permissions to update the recycle bin policy.

write

-

-

evs:volumes:changeChargeMode

Grants permission to change the billing mode of disks.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:snapshots:create

Grants permission to create snapshots for disks.

write

snapshot *

-

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:snapshots:list

Grants permission to list snapshots.

list

-

g:EnterpriseProjectId

evs:snapshots:get

Grants permission to query snapshots.

read

-

g:EnterpriseProjectId

evs:snapshots:delete

Grants permission to delete snapshots.

write

-

g:EnterpriseProjectId

evs:snapshots:update

Grants permission to update snapshots.

write

-

g:EnterpriseProjectId

evs:snapshots:rollback

Grants permissions to roll back data from snapshots.

write

-

g:EnterpriseProjectId

evs:types:get

Grants permission to query disk types.

read

-

-

evs:quotas:get

Grants permission to query EVS quotas.

read

-

-

evs:volumes:tagResource

Grants permission to add tags to a disk.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

-

  • g:RequestTag/<tag-key>
  • g:TagKeys

evs:volumes:unTagResource

Grants permission to delete tags from a disk.

write

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

-

g:TagKeys

evs:volumes:listTags

Grants permission to query all disk tags in a project.

list

-

-

evs:volumes:listTagsForResource

Grants permission to query disk tags.

read

volume *

  • g:ResourceTag/<tag-key>
  • g:EnterpriseProjectId

evs:volumes:listResourcesByTag

Grants permission to list disks by tag.

list

-

g:TagKeys

evs:volumes:use

Grants permission to allow ECSs and BMSs to use EVS disks.

write

-

g:EnterpriseProjectId

Each API of EVS usually supports one or more actions. Table 2 lists the supported actions and dependencies.

Table 2 Actions and dependencies supported by EVS APIs

API

Action

Dependencies

POST /v2.1/{project_id}/cloudvolumes

evs:volumes:create

billing:order:pay

POST /v2/{project_id}/cloudvolumes

evs:volumes:create

-

POST /v3/{project_id}/cloudvolumes

evs:volumes:create

-

GET /v2/{project_id}/cloudvolumes/detail

evs:volumes:list

-

GET /v2/{project_id}/cloudvolumes/{volume_id}

evs:volumes:get

-

DELETE /v2/{project_id}/cloudvolumes/{volume_id}

evs:volumes:delete

-

PUT /v2/{project_id}/cloudvolumes/{volume_id}

evs:volumes:update

-

POST /v2.1/{project_id}/cloudvolumes/{volume_id}/action

evs:volumes:resize

billing:order:pay

POST /v5/{project_id}/volumes/batch-extend

evs:volumes:resize

billing:order:pay

POST /v2/{project_id}/cloudvolumes/{volume_id}/action

evs:volumes:resize

-

PUT /v5/{project_id}/cloudvolumes/{volume_id}/qos

evs:volumes:modifyQos

-

POST /v2/{project_id}/cloudvolumes/unsubscribe

evs:volumes:delete

billing:subscription:unsubscribe

POST /v2/{project_id}/cloudvolumes/change-charge-mode

evs:volumes:changeChargeMode

  • billing:order:pay
  • billing:subscription:renew

POST /v2/{project_id}/cloudsnapshots

evs:snapshots:create

-

GET /v2/{project_id}/cloudsnapshots/detail

evs:snapshots:list

-

GET /v2/{project_id}/cloudsnapshots/{snapshot_id}

evs:snapshots:get

-

DELETE /v2/{project_id}/cloudsnapshots/{snapshot_id}

evs:snapshots:delete

-

PUT /v2/{project_id}/cloudsnapshots/{snapshot_id}

evs:snapshots:update

-

POST /v2/{project_id}/cloudsnapshots/{snapshot_id}/rollback

evs:snapshots:rollback

-

POST /v2/{project_id}/cloudvolumes/{volume_id}/tags/action

evs:volumes:tagResource

-

POST 01 /v2/{project_id}/cloudvolumes/{volume_id}/tags/action

evs:volumes:unTagResource

-

GET /v2/{project_id}/cloudvolumes/tags

evs:volumes:listTags

-

GET /v2/{project_id}/cloudvolumes/{volume_id}/tags

evs:volumes:listTagsForResource

-

POST /v2/{project_id}/cloudvolumes/resource_instances/action

evs:volumes:listResourcesByTag

-

Resources

A resource type indicates the resources that an SCP policy applies to. If you specify a resource type for any action in Table 3, the resource URN must be specified in the SCP statements using that action, and the SCP applies only to resources of this type. If no resource type is specified, the Resource element is marked with an asterisk (*) and the SCP applies to all resources. You can also set condition keys in an SCP policy to define resource types.

The following table lists the resource types that you can define in SCP statements for EVS.

Table 3 Resource types supported by EVS

Resource Type

URN

imageCache

evs:<region>:<account-id>:imageCache:<imageCache-id>

snapshot

evs:<region>:<account-id>:snapshot:<snapshot-id>

volume

evs:<region>:<account-id>:volume:<volume-id>

Conditions

A Condition element lets you specify conditions for when an SCP is in effect. It contains condition keys and operators.

  • The condition key that you specify can be a global condition key or a service-specific condition key.
    • Global condition keys (with the g: prefix) apply to all actions. Cloud services do not need to provide user identity information. Instead, the system automatically obtains such information and authenticates users. For details, see Global Condition Keys.
    • Service-specific condition keys (with the abbreviation of a service name plus a colon as the prefix, for example, evs:) apply only to operations of the EVS service. For details, see Table 4.
    • The number of values associated with a condition key in the request context of an API call makes the condition key single-valued or multivalued. Single-valued condition keys have at most one value in the request context of an API call. Multivalued condition keys can have multiple values in the request context of an API call. For example, a request can originate from at most one VPC endpoint, so g:SourceVpce is a single-valued condition key. You can tag resources and include multiple tag key-value pairs in a request, so g:TagKeys is a multivalued condition key.
    • A condition operator, condition key, and a condition value together constitute a complete condition statement. An SCP can be applied only when its request conditions are met. For supported condition operators, see Condition operators.

The following table lists the condition keys that you can define in custom SCP policies for EVS. You can include these condition keys to specify conditions for when your SCP policy is in effect.

Table 4 Service-specific condition keys supported by EVS

Service-specific Condition Key

Type

Single-valued/Multivalued

Description

evs:Encrypted

boolean

Single-valued

Filters access based on whether the disk is encrypted.

evs:KmsKeyId

string

Single-valued

Filters access based on the key ID used by the disk.

evs:ImageId

string

Single-valued

Filters access by image ID.

evs:BackupId

string

Single-valued

Filters access by backup ID.

evs:SnapshotId

string

Single-valued

Filters access by snapshot ID.

evs:AvailabilityZone

string

Single-valued

Filters access based on the AZ of the disk.

evs:SourceAvailabilityZone

string

Single-valued

Filters access by source AZ.

evs:VolumeType

string

Single-valued

Filters access based on the disk type.

evs:VolumeSize

numeric

Single-valued

Filters access based on the disk capacity.

evs:VolumeIops

numeric

Single-valued

Filters access based on the disk IOPS.

evs:VolumeThroughput

numeric

Single-valued

Filters access based on the disk throughput.

evs:ChargingMode

string

Single-valued

Filters access based on the disk billing mode.

evs:ServerServiceType

string

Single-valued

Filters access based on the service type of the cloud server.

evs:VolumeId

string

Single-valued

Filters access based on the disk ID.

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