If system policies do not meet your requirements, you can configure custom policies to implement the principle of least privilege. You can use custom policies to implement fine-grained permission management and improve resource security. This topic describes common scenarios where you can use custom policies for Tair and provides examples.
What is a custom policy?
Resource Access Management (RAM) policies are classified into system policies and custom policies. You can manage custom policies based on your business requirements.
After you create a custom policy, you must attach the policy to a RAM user, RAM user group, or RAM role. This way, the permissions that are specified in the policy can be granted to the principal.
You can delete a RAM policy that is not attached to a principal. If the RAM policy is attached to a principal, you must detach the RAM policy from the principal before you can delete the RAM policy.
Custom policies support version control. You can manage custom policy versions based on the version management mechanism provided by RAM.
References
Common scenarios and examples
The following code provides examples of common custom policies. You must replace Tair instance ID in the following code with your actual Tair instance ID.
Full management permissions for a single instance
The following policy grants full management permissions for the specified Tair instance:
{ "Version": "1", "Statement": [ { "Effect": "Allow", "Action": "kvstore:*", "Resource": "acs:kvstore:*:*:*/<Tair instance ID>", "Condition": {} }, { "Action": "kvstore:Describe*", "Resource": "*", "Effect": "Allow" } ] }Full management permissions for multiple instances
The following policy grants full management permissions for multiple specified Tair instances:
{ "Version": "1", "Statement": [ { "Effect": "Allow", "Action": "kvstore:*", "Resource": [ "acs:kvstore:*:*:*/<Tair instance ID>", "acs:kvstore:*:*:*/<Tair instance ID>" ], "Condition": {} }, { "Action": "kvstore:Describe*", "Resource": "*", "Effect": "Allow" } ] }Permissions to modify whitelists for a single instance
The following policy grants the permissions to modify the IP address whitelists of the specified Tair instance:
{ "Version": "1", "Statement": [ { "Effect": "Allow", "Action": "kvstore:ModifySecurityIps", "Resource": "acs:kvstore:*:*:*/<Tair instance ID>", "Condition": {} }, { "Action": "kvstore:Describe*", "Resource": "*", "Effect": "Allow" } ] }Permissions for offline key analysis
The following policy indicates that you have the permissions to perform offline key analysis on the specified Tair instance:
{ "Version": "1", "Statement": [ { "Effect": "Allow", "Action": [ "hdm:CreateCacheAnalysisTask", "hdm:DescribeCacheAnalysisReportList", "hdm:DescribeCacheAnalysisReport", "hdm:CreateCacheAnalysisJob", "hdm:DescribeCacheAnalysisJob", "hdm:DescribeCacheAnalysisJobs", "hdm:GetInstanceLatestBackup" ], "Resource": "acs:kvstore:*:*:instance/<Tair instance ID>", "Condition": {} }, { "Action": "ram:CreateServiceLinkedRole", "Resource": "*", "Effect": "Allow", "Condition": { "StringEquals": { "ram:ServiceName": "hdm.aliyuncs.com" } } } ] }
Authorization information
To use custom policies, you must understand the access control requirements of your business and the authorization information about Tair. For more information, see RAM authorization.