How do you implement an authorization mechanism for a cluster?

The authorization mechanism for a cluster is implemented to control access of users and services to cluster resources. Main approaches:

1. Authentication — verifying the identity of a user (for example, using login/password, certificates, tokens).
2. Authorization — defining access rights after authentication.

To implement authorization in a cluster, the following are often used:

• Role-Based Access Control (RBAC) — assigning roles with specific permissions to users or groups.
• Access policies — rules that determine who can do what.

Example: in Kubernetes, RBAC is used for authorization, where roles are created and linked to users via RoleBinding or ClusterRoleBinding.

External access management systems (LDAP, Active Directory) can also be used for centralized authorization.

Thus, implementing authorization involves configuring authentication, defining roles and permissions, and applying these rules to users and services in the cluster.