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Kubernetes

Kustomize: Template-Free Kubernetes Configuration Management

Master Kustomize for declarative, overlay-based configuration customization without templates

Kustomize is Kubernetes' native configuration management tool that allows you to customize application configurations without templates. Unlike Helm, Kustomize uses a template-free approach with overlays and patches, making it ideal for GitOps workflows and environment-specific customizations.

Why Kustomize Matters for CKA: - Built into kubectl (no separate installation required) - Template-free configuration reduces complexity - GitOps-friendly with declarative overlays - Strategic merge and JSON patches for targeted modifications - ConfigMap and Secret generators for dynamic content

Network Policies: Securing Pod Communication

In a world where security breaches make headlines daily, protecting your Kubernetes cluster isn't optional—it's mission-critical. Network Policies are your first line of defense, implementing a zero-trust security model within your cluster. For CKA candidates, mastering Network Policies isn't just about passing the exam (though they represent a significant portion of the 20% Services & Networking domain)—it's about understanding how to build production-grade, secure Kubernetes environments.

RBAC: Role-Based Access Control

Master Kubernetes authorization with Roles, ClusterRoles, and the principle of least privilege

Role-Based Access Control (RBAC) is Kubernetes' primary authorization mechanism, controlling who can perform which actions on what resources. For the CKA exam, RBAC is critical—you'll need to create ServiceAccounts, configure Roles and RoleBindings, troubleshoot permission issues, and apply least privilege principles. This comprehensive guide covers everything from basic concepts to advanced aggregation patterns, giving you the skills to secure any Kubernetes cluster.

CKA Exam Relevance: Cluster Architecture, Installation & Configuration (25% of exam weight)

Kubernetes Services: Exposing Your Applications

Kubernetes Services are the cornerstone of networking in modern containerized applications. They provide stable, reliable access to dynamic sets of Pods, abstracting away the complexity of Pod IP management and enabling seamless communication between application components. For anyone preparing for the Certified Kubernetes Administrator (CKA) exam, mastering Services is essential—they represent 20% of the exam's Services & Networking domain.

In this comprehensive guide, we'll explore how Services work, when to use each type, and the practical kubectl commands you need to succeed in both the exam and production environments.