Permissions

If you need to assign different permissions to employees in your enterprise to access your CSE resources, IAM is a good choice for fine-grained permissions management. IAM provides identity authentication, permissions management, and access control, helping you secure access to your resources.

With IAM, you can use your public cloud account to create IAM users for your employees, and assign permissions to the users to control their access to specific resource types. For example, you want the software developers in your enterprise to have the permission to use CSE, but do not want them to have the permission to perform high-risk operations such as deletion. Then, you can use IAM to create users for developers and grant them only the permissions required for using CSE resources.

If your public cloud account does not need individual IAM users for permissions management, you may skip over this chapter.

IAM is free of charge. You pay only for the resources in your account. For more information about IAM, see the IAM Service Overview.

CSE Permissions

By default, new IAM users do not have any permissions assigned. You need to add a user to one or more user groups, and assign permission policies to the user groups. The user then inherits permissions from the user groups. This process is known as authorization. After authorization, the user can perform specified operations on CSE based on the permissions.

CSE is a project-level service deployed and accessed in specific physical regions. To assign CSE permissions to a user group, specify the scope as region-specific projects and select projects for the permissions to take effect. If All projects is selected, the permissions will take effect for the user group in all region-specific projects. When accessing CSE, the users need to switch to a region where they have been authorized to use this service.

You can grant users permissions by using roles and policies.

Roles: A coarse-grained authorization mechanism provided by IAM to define permissions based on users' job responsibilities. There are only a limited number of roles for granting permissions to users. When you grant permissions using roles, you also need to assign dependency roles. However, roles are not an ideal choice for fine-grained authorization and secure access control.
Policies are a type of fine-grained authorization mechanism that defines permissions required to perform operations on specific cloud resources under certain conditions. This mechanism allows for more flexible policy-based authorization and secure access control.

Table 1 lists all the system policies supported by CSE.

**Table 1** CSE system permissions
Role/Policy Name	Description	Type	Dependency
CSE FullAccess	Administrator permissions for Cloud Service Engine.	Policy	None
CSE ReadOnlyAccess	View permissions for Cloud Service Engine.	Policy	None

If the listed permissions in Table 1 do not meet actual requirements, you can Creating a Custom Policy for a Microservice Engine.

For details about the service permissions required by CSE functions, see Table 2.

**Table 2** Dependent service permissions
Dependent Service	Permission
VPC	VPC ReadOnlyAccess
ELB	ELB ReadOnlyAccess
AOM	AOM ReadOnlyAccess
TMS	TMS ReadOnlyAccess

Table 3 lists the common operations for each system-defined policy or role of CSE. Select policies or roles as needed.

**Table 3** Common operations supported by each system policy
Operation	CSE ReadOnlyAccess	CSE FullAccess
Create a microservice engine	x	√
Maintain a microservice engine	x	√
Query a microservice engine	√	√
Delete a microservice engine	x	√
Create a microservice	x	√
Query a microservice	√	√
Maintain a microservice	x	√
Delete a microservice	x	√
Create microservice configurations	x	√
Query microservice configurations	√	√
Edit microservice configurations	x	√
Delete microservice configurations	x	√
Create a microservice governance policy	x	√
Query a microservice governance policy	√	√
Edit a microservice governance policy	x	√
Delete a microservice governance policy	x	√

To use a custom fine-grained policy, log in to IAM as the administrator and select fine-grained permissions of CSE as required. Table 4 describes fine-grained permission dependencies of CSE.

**Table 4** Fine-grained permission dependencies of CSE
Permission	Description	Permission Dependency	Application Scenario
cse:engine:list	List all microservice engines	None	View ServiceComb engine list View Nacos engine list
cse:engine:get	View engine information	cse:engine:list	View ServiceComb engine details View Nacos engine details
cse:engine:modify	Modify an engine	cse:engine:list cse:engine:get	Enable/Disable public network access to ServiceComb engines Enable/Manage security authentication for ServiceComb engines Retry a ServiceComb engine task Enable/Disable security authentication for Nacos engines Manage a Nacos user and role Manage relationship between namespaces and enterprise projects
cse:engine:upgrade	Upgrade an engine	cse:engine:list cse:engine:get	Upgrade a ServiceComb engine Upgrade a Nacos engine Upgrades include version upgrade and specification change.
cse:engine:delete	Delete an engine	cse:engine:list cse:engine:get vpc:ports:get vpc:ports:delete	Delete a ServiceComb engine Delete a Nacos engine
cse:engine:create	Create an engine	cse:engine:get cse:engine:list ecs:cloudServerFlavors:get vpc:vpcs:get vpc:vpcs:list vpc:subnets:get vpc:ports:get vpc:ports:create	Create a ServiceComb engine Back up a ServiceComb engine/Restore task creation Create a Nacos engine
cse:config:modify	Modify ServiceComb engine configuration management	cse:engine:list cse:engine:get cse:config:get	Modify global and governance configurations of a ServiceComb engine
cse:config:get	View ServiceComb engine configuration management	cse:engine:list cse:engine:get	View service configurations for a ServiceComb engine
cse:governance:modify	Modify the governance center of a ServiceComb engine	cse:engine:list cse:engine:get cse:config:get cse:config:modify cse:registry:get cse:registry:modify cse:governance:get	Create and modify service governance of a ServiceComb engine
cse:governance:get	View the governance center of a ServiceComb engine	cse:engine:list cse:engine:get cse:config:get cse:registry:get	View service governance on a ServiceComb engine
cse:registry:modify	Modify service registry and management of a ServiceComb engine	cse:engine:list cse:engine:get cse:registry:get	Modify a ServiceComb engine
cse:registry:get	View service registry and management of a ServiceComb engine	cse:engine:list cse:engine:get	View service catalog on a ServiceComb engine
cse:namespace:read	View namespace resources of a Nacos engine	cse:engine:get	View Nacos service list and configuration list
cse:namespace:write	Modify namespace resources of a Nacos engine	cse:engine:get cse:namespace:read	Modify Nacos service list and configuration list resources