Permissions Policies and Supported Actions

This chapter describes fine-grained permissions management for your DCS. If your account does not need individual IAM users, you can skip the configurations described in this chapter.

By default, new IAM users do not have any permissions assigned. You need to add a user to one or more groups, and assign policies or roles to these groups. The user then inherits permissions from the groups it is a member of. This process is called authorization. After authorization, the user can perform specified operations on cloud services based on the permissions.

You can grant users permissions by using roles and policies. Roles are a type of coarse-grained authorization mechanism that defines permissions related to user responsibilities. Policies define API-based permissions for operations on specific resources under certain conditions, allowing for more fine-grained, secure access control of cloud resources.

You can use policies to allow or deny access to specific APIs.

An account has all of the permissions required to call all APIs, but IAM users must have the required permissions specifically assigned. The permissions required for calling an API are determined by the actions supported by the API. Only users who have been granted permissions allowing the actions can call the API successfully. For example, if an IAM user wants to query ECSs using an API, the user must have been granted permissions that allow the dcs:servers:list action.

Supported Actions

DCS provides system-defined policies, which can be directly used in IAM. You can also create custom policies to supplement system-defined policies for more refined access control. Actions supported by policies are specific to APIs. Common concepts related to policies include:

Permissions: Allow or deny certain operations.
APIs: REST APIs that can be called in a custom policy.
Actions: Added to a custom policy to control permissions for specific operations.
Dependent actions: When assigning permissions for an action, you also need to assign permissions for the dependent actions.
IAM and enterprise projects: Type of projects for which an action will take effect. Policies that contain actions supporting both IAM and enterprise projects can be assigned to user groups and take effect in both IAM and Enterprise Management. Policies that only contain actions supporting IAM projects can be assigned to user groups and only take effect for IAM. Such policies will not take effect if they are assigned to user groups in Enterprise Project. Administrators can check whether an action supports IAM projects or enterprise projects in the action list. The check mark (√) indicates that the action supports the project and the cross symbol (×) indicates that the action does not support the project.

The following table lists the API actions supported by DCS.

**Table 1** DCS actions
Permissions	Action	API	IAM Project	Enterprise Project
Creating DCS instances	dcs:instance:create	POST /v1.0/{project_id}/instances	√	√
Querying an instance	dcs:instance:get	GET /v1.0/{project_id}/instances/{instance_id}	√	√
Modifying the information about an instance	dcs:instance:modify	PUT /v1.0/{project_id}/instances/{instance_id}	√	√
Deleting an instance	dcs:instance:delete	DELETE /v1.0/{project_id}/instances/{instance_id}	√	√
Expanding instance capacity	dcs:instance:scale	POST /v1.0/{project_id}/instances/{instance_id}/extend	√	√
Querying all instances	dcs:instance:list	GET /v1.0/{project_id}/instances	√	√
Querying instance configuration parameters	dcs:instance:getConfiguration	GET /v1.0/{project_id}/instances/{instance_id}/configs	√	√
Modifying instance configuration parameters	dcs:instance:modifyConfigureation	PUT /v1.0/{project_id}/instances/{instance_id}/configs	√	√
Restarting an instance or clearing instance data	dcs:instance:modifyStatus	PUT /v1.0/{project_id}/instances/status	√	√
Changing the instance password	dcs:instance:modifyAuthInfo	PUT /v1.0/{project_id}/instances/{instance_id}/password	√	√
Backing up an instance	dcs:instance:backupData	POST /v1.0/{project_id}/instances/{instance_id}/backups	√	√
Restoring an instance	dcs:instance:restoreData	POST /v1.0/{project_id}/instances/{instance_id}/restores	√	√
Querying backup records	dcs:instance:getDataBackupLog	GET /v1.0/{project_id}/instances/{instance_id}/backups	√	√
Querying restoration records	dcs:instance:getDataRestoreLog	GET /v1.0/{project_id}/instances/{instance_id}/restores	√	√
Deleting backup files	dcs:instance:deleteDataBackupFile	DELETE /v1.0/{project_id}/instances/{instance_id}/backups/{backup_id}	√	√
Listing background tasks	dcs:instance:getBackgroundTask	GET /v1.0/{project_id}/instances/{instance_id}/tasks	√	√
Deleting a background task	dcs:instance:deleteBackgroundTask	DELETE /v1.0/{project_id}/instances/{instance_id}/tasks/{task_id}	√	√
Resetting the instance password	dcs:instance:resetAuthInfo	-	√	√
Downloading backup files	dcs:instance:downloadBackupData	-	√	√
Migrating data	dcs:instance:migrateData	-	√	√
Web CLI	dcs:instance:webcli	-	√	√
Creating a migration task	dcs:migrationTask:create	-	√	X
Modifying migration task configurations or stopping a migration task	dcs:migrationTask:modify	-	√	X
Deleting a migration task	dcs:migrationTask:delete	-	√	X
Listing migration tasks	dcs:migrationTask:list	-	√	X
Querying details of a data migration task	dcs:migrationTask:get	-	√	X
Diagnosing an instance	dcs:instance:diagnosis	-	√	√
Viewing parameter templates	dcs:template:list	-	√	X
Creating a parameter template	dcs:template:create	-	√	X
Performing a master/standby switchover	dcs:instance:swap	-	√	√
Modifying the whitelist of an instance	dcs:whitelist:modify	-	√	√
Obtaining the whitelist of an instance	dcs:whitelist:list	-	√	√
Creating a user for accessing an instance	dcs:aclaccount:create	-	√	√
Deleting an instance user	dcs:aclaccount:delete	-	√	√
Modifying the information about an instance user	dcs:aclaccount:modify	-	√	√
Obtaining the list of instance users	dcs:aclaccount:list	-	√	√
Querying slow logs	dcs:slowlog:list	-	√	√
Viewing parameter templates	dcs:template:get	-	√	X
Viewing audit logs	dcs:auditlog:get	-	√	√
Querying SSL encryption of an instance	dcs:ssl:get	-	√	√
Updating domain names	dcs:domainname:rebuild	-	√	√
Switching IP addresses	dcs:migrationTask:exchangeIp	-	√	X
Rolling back IP address switching	dcs:migrationTask:rollbackIp	-	√	X
Killing Redis sessions	dcs:clients:kill	-	√	√
Modifying a parameter template	dcs:template:modify	-	√	X
Enabling or disabling public domain name resolution	dcs:publicdomainname:update	-	√	√
Deleting a parameter template	dcs:template:delete	-	√	X
Releasing historical domain names	dcs:histroydomainname:release	-	√	√
Upgrading the instance version	dcs:instance:upgrade	-	√	√
Analyzing big or hot keys	dcs:instance:analyze	-	√	√
Enabling or disabling audit logging	dcs:auditlog:modify	-	√	√
Enabling or disabling client IP pass-through	dcs:clientiptrans:modify	-	√	√
Modifying SSL encryption for an instance	dcs:ssl:modify	-	√	√