Permissions

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

With IAM, you can create IAM users and assign permissions to control their access to specific resources. For example, if you want some software developers in your enterprise to use ELB resources but do not want them to delete these resources or perform any other high-risk operations, you can grant permission to use ELB resources but not permission to delete them.

Skip this section if your Huawei Cloud account does not require individual IAM users for permissions management.

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

ELB Permissions

New IAM users do not have any permissions assigned by default. You need to first add them to one or more groups and attach policies or roles to these groups. The users then inherit permissions from the groups and can perform specified operations on cloud services based on the permissions they have been assigned.

ELB is a project-level service deployed for specific regions. To assign ELB permissions to a user group, specify the scope as region-specific projects and select projects for which you want the permissions to take effect. If you select All projects, the permissions will take effect for the user group in all region-specific projects. When accessing ELB, users need to switch to the authorized region.

You can grant permissions by using roles and policies.

Roles: A coarse-grained authorization strategy provided by IAM to assign permissions based on users' job responsibilities. Only a limited number of service-level roles are available for authorization. When you grant permissions using roles, you also need to attach any existing role dependencies. Roles are not ideal for fine-grained authorization and least privilege access.
Policies: A fine-grained authorization strategy provided by IAM to assign permissions required to perform operations on specific cloud resources under certain conditions. This type of authorization is more flexible and is ideal for least privilege access. For example, you can grant ELB users only permissions to manage a certain type of resources. A majority of fine-grained policies contain permissions for specific APIs, and permissions are defined using API actions. For the API actions supported by ELB, see Permissions Policies and Supported Actions.

Table 1 lists all the system-defined permissions for ELB.

**Table 1** System-defined permissions for ELB
Role/Policy Name	Description	Type
ELB FullAccess	Permissions: all permissions on ELB resources Scope: project-level service	System-defined policy
ELB ReadOnlyAccess	Permissions: read-only permissions on ELB resources Scope: project-level service	System-defined policy
ELB Administrator	Permissions: all permissions on ELB resources. To be granted this permission, users must also have the Tenant Administrator, VPC Administrator, CES Administrator, Server Administrator and Tenant Guest permissions. Scope: project-level service NOTE: If your account has applied for fine-grained permissions, configure fine-grained policies for ELB system permissions, instead of ELB Administrator policies.	System-defined role

Table 2 describes common operations supported by each system policy of ELB.

**Table 2** Common operations supported by system-defined policies
Operation	ELB FullAccess	ELB ReadOnlyAccess	ELB Administrator
Creating a load balancer	Supported	Not supported	Supported
Querying a load balancer	Supported	Supported	Supported
Querying a load balancer and associated resources	Supported	Supported	Supported
Querying load balancers	Supported	Supported	Supported
Modifying a load balancer	Supported	Not supported	Supported
Deleting a load balancer	Supported	Not supported	Supported
Adding a listener	Supported	Not supported	Supported
Querying a listener	Supported	Supported	Supported
Modifying a listener	Supported	Not supported	Supported
Deleting a listener	Supported	Not supported	Supported
Adding a backend server group	Supported	Not supported	Supported
Querying a backend server group	Supported	Supported	Supported
Modifying a backend server group	Supported	Not supported	Supported
Deleting a backend server group	Supported	Not supported	Supported
Adding a backend server	Supported	Not supported	Supported
Querying a backend server	Supported	Supported	Supported
Modifying a backend server	Supported	Not supported	Supported
Deleting a backend server	Supported	Not supported	Supported
Configuring a health check	Supported	Not supported	Supported
Querying a health check	Supported	Supported	Supported
Modifying a health check	Supported	Not supported	Supported
Disabling a health check	Supported	Not supported	Supported
Assigning an EIP	Not supported	Not supported	Supported
Binding an EIP to a load balancer	Not supported	Not supported	Supported
Querying an EIP	Supported	Supported	Supported
Unbinding an EIP from a load balancer	Not supported	Not supported	Supported
Viewing metrics	Not supported	Not supported	Supported
Viewing access logs	Not supported	Not supported	Supported

To unbind an EIP, you also need to configure the vpc:bandwidths:update and vpc:publicIps:update permission of the VPC service. For details, see the Virtual Private Cloud API Reference.
To view monitoring metrics, you also need to configure the CES ReadOnlyAccess permission. For details, see the Cloud Eye API Reference.
To view access logs, you also need to configure the LTS ReadOnlyAccess permission. For details, see the Log Tank Service API Reference.