How do you manage identity and access control for cloud-native applications?

Managing identity and access control (IAM) for cloud-native applications is a core security mechanism to ensure secure interaction of resources and services in distributed environments. Its importance lies in the loose coupling of cloud-native architectures and the complexity of inter-service communication; application scenarios include API gateway calls, authentication between microservices, and authorization operations across clusters.

The core components include ServiceAccounts, Roles, and Policies. OpenID Connect (OIDC) provides standardized identity federation, while Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC) enable fine-grained authorization. Service mesh proxies like Istio provide transparent transport layer security authentication. In practical applications, this simplifies the implementation of zero-trust architecture and reduces the risk of data leakage caused by configuration errors.

Implementation steps: 1. Integrate identity providers (such as Azure AD) using OIDC; 2. Define Kubernetes Roles/RoleBindings or custom resource authorization; 3. Deploy service account tokens for services; 4. Restrict Pod communication through network policies. A typical scenario is authorizing CI/CD pipelines with cluster deployment permissions. Business values include improved audit compliance and reduced operational costs.