The original title is "Understanding Kubernetes RBAC: Roles, RoleBindings, and Client Certificates"

Short summary

Kubernetes requires two-step authorization: authentication (proving identity via client certificate) and authorization (defining permissions with RBAC). This tutorial walks through creating a user certificate, setting up a Role to grant permissions on specific resources, and binding it to the user. RBAC enforces least-privilege access — users only get explicitly defined permissions.

• •Authentication uses client certificates; authorization uses RBAC roles and bindings
• •A Role defines permissions for specific resources (e.g., get/watch/list pods)
• •A RoleBinding assigns a Role to a user, enforcing least-privilege principle

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