Prepare CKA & CKAD Certifications
About the Book
Kubernetes is a recent platform, based on more than ten years of experience in cloud computing by big companies like Google. It is considered complex as it includes all the concepts to run diverse applications in a large variety of environments.
This book, based on the curricula of the two Kubernetes Certifications (Application Developer and Administrator), introduces all the concepts and tools necessary to start administer a Kubernetes cluster and deploy applications in production.
Administrators and application developers having a good knowledge in microservices development and deployment will get the necessary knowledge to deploy the application they have in charge to Kubernetes.
According to a survey conducted by the CNCF in 2018, 58% of respondents are using Kubernetes in production, while 42% are evaluating it for future use. In comparison, 40% of enterprise companies (5000+) are running Kubernetes in production.
Creating a cluster with kubeadm
- Provisioning compute resources
- Install Docker on the hosts
- Install kubeadm, kubelet and kubectl on the hosts
- Initialize the control plane node
- Join the workers
Control Plane components
- Explore the Control Plane services
Accessing the cluster
- Install kubectl on your dev machine
- Access the cluster from the dev machine
- Labels and selectors
- Pod specs
- Container Specs
- Pod Controllers
- ReplicaSet controller
- Deployment controller
- Update and Rollback
- Deployment Strategies
- Arguments to the command
- Environment Variables
- Configuration file from ConfigMap
- Configuration file from Secret
- Configuration file from Pod fields
- Configuration file from container resources fields
- Configuration file from different sources
Scaling an application
- Manual scaling
- Controller to the rescue
- Liveness probes
- Resource limits and Quality of Service classes
- Using label selectors to schedule Pods on specific nodes
- Static Pods
- Resource requests
- Running multiple schedulers
Discovery and Load-balancing
- Services Types
- Security Contexts
- Network policies
- Working with private Docker registries
- Persistent Volumes
- Claiming a Persistent volume
- Using auto-provisioned persistent volumes
Monitoring and Logging
- Basic logging
Upgrading the cluster
- Upgrade the controller
- Upgrade the workers
- Upgrading the operating system
- Backup a cluster
- Restore a cluster
- Managing kubeconfig file
- Generic commands
- Creating applications resources
- Managing clusters
- Getting Documentation
Curriculum CKA 1.15
- Scheduling (5%)
- Logging/Monitoring (5%)
- Application Lifecycle Management (8%)
- Cluster Maintenance (11%)
- Security (12%)
- Storage (7%)
- Troubleshooting (10%)
- Core Concepts (19%)
Curriculum CKAD 1.15
- Core Concepts (13%)
- Configuration (18%)
- Multi-Container Pods (10%)
- Observability (18%)
- Pod Design (20%)
- Services and Networking (13%)
- State Persistence (8%)
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