Certified Kubernetes Administrator (CKA)

01. Core Concepts

• Cluster Architecture
• Docker vs. ContainerD (and Docker Deprecation)
• ETCD for Beginners and in Kubernetes
• Kube API Server, Controller Manager, and Scheduler
• Kubelet and Kube Proxy
• Pods and Pods with YAML
• ReplicaSets and Deployments
• Services: Cluster IP and Loadbalancer
• Namespaces
• Imperative vs. Declarative Management
• Kubectl Apply Command

02. Scheduling

• Manual Scheduling
• Labels and Selectors
• Taints and Tolerations vs. Node Affinity
• Resource Limits and Quotas
• DaemonSets and Static Pods
• Multiple Schedulers and Scheduler Profiles

03. Logging & Monitoring

• Monitor Cluster Components
• Managing Application Logs

04. Application Lifecycle Management

• Rolling Updates and Rollbacks
• Commands and Arguments (Docker vs. Kubernetes)
• Configure Environment Variables and ConfigMaps
• Secrets: Management and Encryption at Rest
• Multi-Container Pods (Sidecar, Adapter, Ambassador)

05. Cluster Maintenance

• OS Upgrades and Node Maintenance
• Kubernetes Software Versions and Upgrade Process
• Backup and Restore Methods (ETCD Snapshot)

06. Security

• Kubernetes Security Primitives
• Authentication and TLS (Certificates API)
• KubeConfig and API Groups
• Authorization: RBAC and Cluster Roles
• Service Accounts
• Image Security and Security Contexts
• Network Policies: Development and Implementation

07. Storage

• Docker Storage vs. Container Storage Interface (CSI)
• Volumes and Persistent Volumes (PV)
• Persistent Volume Claims (PVC)
• Storage Classes (Dynamic Provisioning)

08. Networking

• Prerequisites: Switching, Routing, DNS, and Namespaces
• Cluster and Pod Networking (CNI weave)
• Service Networking and DNS in Kubernetes
• CoreDNS and Ingress Controllers

09. & 10. Cluster Design, Installation, and Kubeadm

• Design a Kubernetes Cluster for High Availability
• Choosing Infrastructure and ETCD in HA
• Deployment with Kubeadm (Provisioning with Vagrant)

11. & 12. Troubleshooting and Advanced Topics

• Application Failure and Control Plane Failure
• Worker Node Failure Troubleshooting
• Advanced Kubectl Commands and JSONPath