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Authorization Policy Syntax

Last updated: 2022-04-01 22:05:41

    CAM Policy Syntax

                  "condition": {"key":{"value"}} 
    • version is required. Currently, only the value "2.0" is allowed.
    • statement describes the details of one or more permissions. It contains a permission or permission set of multiple other elements such as effect, action, resource, and condition. One policy has only one statement.
    • effect is required. It describes the result of a statement. The result can be "allow" or an "explicit deny".
    • action is required. It describes the allowed or denied operation. An operation can be an API or a feature set (a set of specific APIs prefixed with "permid").
    • resource is required. It describes the details of authorization. A resource is described in a six-segment format. Detailed resource definitions vary by product.
    • condition is required. It describes the condition for the policy to take effect. A condition consists of operator, action key, and action value. A condition value may contain information such as time and IP address. Some services allow you to specify additional values in a condition.

    TDSQL-C for MySQL Operations

    In a CAM policy statement, you can specify any API operation from any service that supports CAM. APIs prefixed with cynosdb: should be used for TDSQL-C for MySQL, such as cynosdb:DescribeClusters or cynosdb:ResetAccountPassword.
    To specify multiple operations in a single statement, separate them with commas as shown below:


    You can also specify multiple operations by using a wildcard. For example, you can specify all operations beginning with "Describe" in the name as shown below:


    If you want to specify all operations in TDSQL-C for MySQL, use the * wildcard as shown below:


    TDSQL-C for MySQL Resource Path

    Each CAM policy statement has its own applicable resources.
    Resource paths are generally in the following format:

    • project_id: describes the project information, which is only used to enable compatibility with legacy CAM logic and can be left empty.
    • service_type: describes the product abbreviation such as cynosdb.
    • region: describes the region information, such as bj.
    • account: describes the root account of the resource owner, such as uin/123xxx8.
    • resource: describes the detailed resource information of each product, such as instance/clusterId or instance/*.

    For example, you can specify a resource for a specific cluster (cynosdbmysql-123abc) in a statement as shown below:

    "resource":[ "qcs::cynosdb:bj:uin/123xxx8:instance/cynosdbmysql-123abc"]

    You can also use the * wildcard to specify it for all clusters that belong to a specific account as shown below:

    "resource":[ "qcs::cynosdb:bj:uin/123xxx8:instance/*"]

    If you want to specify all resources or a specific API operation does not support resource-level permission control, you can use the * wildcard in the resource element as shown below:

    "resource": ["*"]

    To specify multiple resources in one policy, separate them with commas. In the following example, two resources are specified:


    The table below describes the resources that can be used by TDSQL-C for MySQL and the corresponding resource description methods, where words prefixed with $ are placeholders, region refers to a region, and account refers to an account ID.

    Resource Resource Description Method in Authorization Policy
    Cluster qcs::cynosdb:$region:$account:instance/$clusterId
    VPC qcs::vpc:$region:$account:vpc/$vpcId
    Security group qcs::cvm:$region:$account:sg/$sgId
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