Kubernetes RBAC and TLS certificates – Kubernetes security guide (part 1).

The guide provides an in-depth exploration of Kubernetes Role-Based Access Control (RBAC) and Transport Layer Security (TLS) certificates as essential components of Kubernetes security practices. It details the process of creating users in Kubernetes, setting permissions using RBAC, and managing TLS certificates and security tokens. The document covers the foundational elements of RBAC, including Roles, ClusterRoles, RoleBindings, and ClusterRoleBindings, and explains how they govern access to Kubernetes resources. It emphasizes the importance of namespaces for logical segmentation and security, the principle of least privilege for users and service accounts, and the need for specific permissions over broad access. Additionally, it discusses the rotation and expiration of TLS certificates, highlighting the significance of regular updates to protect against key mismanagement and potential security breaches. The guide also touches on user authentication via external directories like LDAP or OpenID Connect for streamlined user management, setting the stage for further exploration of Kubernetes security contexts and policies.

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