Securing Kubernetes components: kubelet, Kubernetes etcd and Docker registry – Kubernetes security guide (part 3).

The guide emphasizes the importance of securing key Kubernetes components like kubelet, etcd, and Docker registries to enhance overall system security. It outlines best practices, such as configuring kubelet security parameters to prevent unauthorized access, utilizing NodeRestriction admission controllers, and employing Role-Based Access Control (RBAC) for secure interactions. For etcd, the guide advises restricting access via PKI-based authentication and firewalls, given its critical role in persisting Kubernetes state. It also discusses the necessity of using trusted Docker registries to avoid vulnerabilities from public images, suggesting credentials be stored as Kubernetes secrets for access control. Additionally, the guide highlights the use of audit logs for forensics and incident detection, and the application of admission webhooks for preemptive security compliance. Overall, it provides a comprehensive overview of securing Kubernetes components to prevent unauthorized access and maintain system integrity.