RAM authorization - Virtual Private Cloud - Alibaba Cloud Documentation Center

Resource Access Management (RAM) is a service provided by Alibaba Cloud to manage user identities and resource access permissions. Using RAM helps you avoid sharing your Alibaba Cloud account keys with other users and allows you to grant users the least privilege access. RAM uses permission policies to define authorizations. This topic describes the general structure of a RAM policy, and the policy statement elements (Action, Resource, and Condition) defined by Virtual Private Cloud for RAM permission policies. The RAM code (RamCode) for Virtual Private Cloud is vpc , and the supported authorization granularity is RESOURCE .

General structure of a policy

Permission policies support JSON format with the following general structure:

{
  "Version": "1",
  "Statement": [
    {
      "Effect": "<Effect>",
      "Action": "<Action>",
      "Resource": "<Resource>",
      "Condition": {
        "<Condition_operator>": {
          "<Condition_key>": [
            "<Condition_value>"
          ]
        }
      }
    }
  ]
}

The following list describes the fields in the policy:

Version: Specifies the policy version number. It is fixed at 1.
Statement:
- Effect: Specifies the authorization result. Valid values: Allow and Deny.
- Action: Specifies one or more operations that are allowed or denied.
- Resource: Specifies the specific objects affected by the operations. You can use Alibaba Cloud Resource Names (ARNs) to describe specific resources.
- Condition: Specifies the conditions for the authorization to take effect. This field is optional.
  - Condition operator: Specifies the conditional operators. Different types of conditions support different conditional operators.
  - Condition_key: Specifies the condition keys.
  - Condition_value: Specifies the condition values.

Action

The following table lists the actions defined by Virtual Private Cloud. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that support authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding ARN in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys that are applicable across all RAM-integrated services. For more information, see Common condition keys.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action	API	Access level	Resource type	Condition key	Dependent action
vpc:GetIpamPoolNextAvailableCidr	GetIpamPoolNextAvailableCidr	get	*IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}`	None	None
vpc:CreateIpam	CreateIpam	create	All Resource ``	None	None
vpc:ListIpamResourceDiscoveryAssociations	ListIpamResourceDiscoveryAssociations	list	All Resource ``	None	None
vpc:TagResources	TagResources	update	Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}` IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}` IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId}`	None	None
vpc:ListIpamDiscoveredResource	ListIpamDiscoveredResource	list	*IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}`	None	None
vpc:AddIpamPoolCidr	AddIpamPoolCidr	update	All Resource ``	None	None
vpc:UpdateIpamScope	UpdateIpamScope	update	All Resource ``	None	None
vpc:CreateIpamScope	CreateIpamScope	create	All Resource ``	None	None
vpc:AssociateIpamResourceDiscovery	AssociateIpamResourceDiscovery	update	IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}` Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}`	None	None
vpc:UpdateIpamPoolAllocation	UpdateIpamPoolAllocation	update	All Resource ``	None	None
vpc:ListIpamPoolCidrs	ListIpamPoolCidrs	list	All Resource ``	None	None
vpc:GetIpamPoolAllocation	GetIpamPoolAllocation	get	*IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}`	None	None
vpc:CreateIpamPoolAllocation	CreateIpamPoolAllocation	create	All Resource ``	None	None
vpc:UpdateIpam	UpdateIpam	update	*Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}`	None	None
vpc:CreateIpamResourceDiscovery	CreateIpamResourceDiscovery	create	IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/`	None	None
vpc:DeleteIpamPoolAllocation	DeleteIpamPoolAllocation	delete	*IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}`	None	None
vpc:DeleteIpamPool	DeleteIpamPool	delete	All Resource ``	None	None
vpc:DissociateIpamResourceDiscovery	DissociateIpamResourceDiscovery	update	IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}` Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}`	None	None
vpc:DeleteIpamResourceDiscovery	DeleteIpamResourceDiscovery	delete	*IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}`	None	None
vpc:UntagResources	UntagResources	update	Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}` IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}` IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId}`	None	None
vpc:OpenVpcIpamService	OpenVpcIpamService	create	All Resource ``	None	None
vpc:ListIpamResourceCidrs	ListIpamResourceCidrs	list	*IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId}`	None	None
vpc:UpdateIpamPool	UpdateIpamPool	update	All Resource ``	None	None
vpc:ListTagResources	ListTagResources	list	Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}` IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}` IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId}`	None	None
vpc:ListIpamResourceDiscoveries	ListIpamResourceDiscoveries	list	All Resource ``	None	None
vpc:ListIpamMembers	ListIpamMembers	list	All Resource ``	None	None
vpc:ListIpamPools	ListIpamPools	list	IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/`	None	None
vpc:GetVpcIpamServiceStatus	GetVpcIpamServiceStatus	get	All Resource ``	None	None
vpc:AddIpamMembers	AddIpamMembers	create	All Resource ``	None	None
vpc:ListIpamPoolAllocations	ListIpamPoolAllocations	list	All Resource ``	None	None
vpc:DeleteIpam	DeleteIpam	create	All Resource ``	None	None
vpc:CreateIpamPool	CreateIpamPool	create	IpamPool `acs:vpc:{#regionId}:{#accountId}:ipamscope/`	None	None
vpc:DeleteIpamPoolCidr	DeleteIpamPoolCidr	delete	*IpamPool `acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId}`	None	None
vpc:ListIpams	ListIpams	list	All Resource ``	None	None
vpc:ChangeResourceGroup	ChangeResourceGroup	update	*Ipam `acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}`	None	None
vpc:DeleteIpamScope	DeleteIpamScope	delete	*IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId}`	None	None
vpc:ListIpamScopes	ListIpamScopes	list	IpamScope `acs:vpc:{#regionId}:{#accountId}:ipamscope/`	None	None
vpc:UpdateIpamResourceDiscovery	UpdateIpamResourceDiscovery	update	*IpamResourceDiscovery `acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}`	None	None

Resource

The following table lists the resources defined by Virtual Private Cloud. Specify them in the Resource element of RAM policy statements to grant permissions for specific operations. They are uniquely identified by ARNs. Format: acs:{#ramcode}:{#regionId}:{#accountId}:{#resourceType}:

acs: The initialism of Alibaba Cloud service, which indicates the public cloud of Alibaba Cloud.
{#ramcode}: The code used in RAM to indicate an Alibaba Cloud service.
{#regionId}: The region ID. If the resource covers all regions, set it to an asterisk (*).
{#accountId}: The ID of the Alibaba Cloud account. If the resource covers all Alibaba Cloud accounts, set it to an asterisk (*).
{#resourceType}: The service-defined resource identifier. It supports a hierarchical structure, which is similar to a file path. If the statement covers global resources, set it to an asterisk (*).

Resource type	ARN
IpamPool	acs:vpc:{#regionId}:{#accountId}:ipampool/{#IpamPoolId} acs:vpc:{#regionId}:{#accountId}:ipampool/* acs:vpcipam:{#regionId}:{#accountId}:ipampool/{#IpamPoolId} acs:vpc:{#regionId}:{#accountId}:ipamscope/*
Ipam	acs:vpc:{#regionId}:{#accountId}:ipam/* acs:vpc:{#regionId}:{#accountId}:ipam/{#IpamId}
IpamResourceDiscovery	acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/* acs:vpc:{#regionId}:{#accountId}:ipamresourcediscovery/{#IpamResourceDiscoveryId}
IpamScope	acs:vpc:{#regionId}:{#accountId}:ipamscope/{#IpamScopeId} acs:vpc:{#regionId}:{#accountId}:ipamscope/* acs:vpc:{#regionId}:{#accountId}:ipam/*
IpamService	acs:vpc:{#regionId}:{#accountId}:ipam/*

Condition

Virtual Private Cloud does not define product-level condition keys. However, you can use Alibaba Cloud common condition keys for access control. For more information, see Common condition keys.

How to create custom RAM policies?

You can create custom policies and grant them to RAM users, RAM user groups, or RAM roles. For instructions, see: