What Is IAM?
Identity and Access Management (IAM) is a basic service that provides permissions management to help you securely control access to your cloud services and resources.
Advantages
Fine-grained access control for resources
An account is created after you successfully register with the cloud platform. Your account has full access permissions for your cloud services and resources.
If you create multiple resources on the cloud platform, such as Elastic Cloud Servers (ECSs), Elastic Volume Services (EVSs), and Bare Metal Servers (BMSs), for different teams or applications in your enterprise, you can create IAM users for the team members or applications and grant them permissions required to complete tasks. The IAM users use their own usernames and passwords to log in to the cloud platform and access resources in your account.
In addition to IAM, you can use Enterprise Management to control access to cloud resources. Enterprise Management supports more fine-grained permissions management and enterprise project management. You can choose either IAM or Enterprise Management to suit your requirements.
Cross-account resource access delegation
If you create multiple resources on the cloud platform, you can delegate another account to manage specific resources for efficient O&M.
For example, you create an agency for a professional O&M company to manage specific resources with the company's own account. You can cancel or modify the delegated permissions at any time if the delegation changes. In the following figure, account A is the delegating party, and account B is the delegated party.
Federated access to the cloud platform with existing enterprise accounts
If your enterprise has an identity system, you can create an identity provider in IAM to provide single sign-on (SSO) access to the cloud platform for employees in your enterprise. The identity provider establishes a trust relationship between your enterprise and the cloud platform, allowing the employees to access the cloud platform using their existing accounts.
Access Methods
You can access IAM using either of the following methods:
- Management console
Access IAM through the management console ─ a browser-based visual interface.
- REST APIs
Access IAM using REST APIs in a programmable way.
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