Can you explain the principle of roles and permissions in the Kubernetes access control system?

Access management in Kubernetes is based on roles (Role) and permissions, which define what actions a user or service can perform in the cluster.

• Role — a set of rules (permissions) that describe which operations are allowed on which resources (e.g., reading pods, creating services).
• ClusterRole — similar to Role, but operates at the cluster level rather than within a single namespace.
• RoleBinding and ClusterRoleBinding bind roles to users, groups, or service accounts, granting them the appropriate rights.

Thus, the RBAC (Role-Based Access Control) system in Kubernetes allows flexible access management, restricting user and service actions to only the permissions necessary for their work.