Help Center/ Distributed Message Service for RocketMQ/ User Guide (Kuala Lumpur Region)/ Permissions Management/ DMS for RocketMQ Custom Policies
Updated on 2024-04-08 GMT+08:00
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DMS for RocketMQ Custom Policies

Custom policies can be created to supplement the system-defined policies of DMS for RocketMQ. For the actions that can be added to custom policies, see Permissions Policies and Supported Actions.

You can create custom policies in either of the following ways:

  • Visual editor: Select cloud services, actions, resources, and request conditions. This does not require knowledge of policy syntax.
  • JSON: Edit JSON policies from scratch or based on an existing policy.

For details, see Creating a Custom Policy. The following section contains examples of common DMS for RocketMQ custom policies.

DMS for RocketMQ permissions policies are based on DMS. Therefore, when assigning permissions, select DMS permissions policies.

Example Custom Policies

  • Example 1: Allowing users to delete and restart instances 
    {
    "Version": "1.1",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "dms:instance:modifyStatus",
                "dms:instance:delete"
            ]
        }
    ]
}
  • Example 2: Denying instance deletion

    A policy with only "Deny" permissions must be used in conjunction with other policies to take effect. If the permissions assigned to a user include both "Allow" and "Deny", the "Deny" permissions take precedence over the "Allow" permissions.

    The following method can be used if you need to assign permissions of the DMS FullAccess policy to a user but you want to prevent the user from deleting instances. Create a custom policy for denying instance deletion, and attach both policies to the group to which the user belongs. Then, the user can perform all operations on DMS for RocketMQ except deleting instances. The following is an example of a deny policy:

    {
        "Version": "1.1",
        "Statement": [
                {
                        "Effect": "Deny",
                        "Action": [
                                "dms:instance:delete"
                        ]
                }
        ]
}
Parent topic: Permissions Management