What is Kubernetes security?

Kubernetes security encompasses the practices, tools, and configurations used to protect Kubernetes clusters, workloads, and data. It includes authentication, authorization (RBAC), network policies, pod security standards, secrets management, and runtime security.

What is the CKS certification?

The Certified Kubernetes Security Specialist (CKS) is a CNCF certification that validates expertise in securing Kubernetes clusters. It covers cluster setup and hardening, system hardening, minimizing microservice vulnerabilities, and supply chain security.

What are Kubernetes network policies?

Network policies are Kubernetes resources that control pod-to-pod and pod-to-external traffic. They act as a firewall for your cluster, allowing you to specify which pods can communicate with each other based on labels, namespaces, and ports.

What are Pod Security Standards?

Pod Security Standards (PSS) are predefined security profiles that define different levels of pod security restrictions: Privileged (unrestricted), Baseline (minimally restrictive to prevent known privilege escalations), and Restricted (heavily restricted following security best practices).

What is RBAC in Kubernetes?

Role-Based Access Control (RBAC) is a Kubernetes authorization mechanism that regulates access to resources based on user roles. It uses Role, ClusterRole, RoleBinding, and ClusterRoleBinding resources to define and assign permissions to users and service accounts.

How do I secure etcd in Kubernetes?

Secure etcd by enabling encryption at rest for secrets, using TLS for client-server communication, restricting access to etcd endpoints via firewall rules, enabling authentication, and running regular backups. etcd stores all cluster data including secrets.

What is a container escape attack?

A container escape attack occurs when a process breaks out of container isolation to access the host system or other containers. Common vectors include privileged containers, hostPath mounts, and kernel exploits. Mitigate with Pod Security Standards and seccomp profiles.

What tools are used for Kubernetes security scanning?

Popular Kubernetes security tools include Trivy (vulnerability scanning), Falco (runtime security), kube-bench (CIS benchmarks), OPA Gatekeeper and Kyverno (policy enforcement), Kubescape (security posture), and Cosign (image signing).

Kubernetes Security Guide

Comprehensive documentation for securing Kubernetes clusters, preparing for CKS certification, and implementing production-grade container security.

Get Started Best Practices

157+Documentation Pages

6CKS Domains Covered

50+Security Topics

Everything You Need for Kubernetes Security

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Aligned with CKS Certification Domains

Content organized around all six domains of the Certified Kubernetes Security Specialist exam.

Cluster Setup 15%

Network policies, CIS benchmarks, ingress security, secure cluster configuration

Cluster Hardening 15%

API server hardening, RBAC, service accounts, upgrade procedures

System Hardening 10%

Host OS security, IAM roles, kernel hardening, attack surface reduction

Minimize Microservice Vulnerabilities 20%

Pod Security Standards, secrets management, runtime sandboxing

Supply Chain Security 20%

Image scanning, admission controllers, artifact signing, SBOM

Monitoring, Logging & Runtime Security 20%

Audit logging, Falco, behavioral analytics, incident response

Start Securing Your Kubernetes Clusters

From fundamentals to advanced hardening techniques — everything you need to build secure, production-ready Kubernetes environments.

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