
Certified Kubernetes Application Developer (CKAD) Study Guide
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Inhalt
- Cover
- Copyright
- Table of Contents
- Foreword
- Preface
- Who This Book Is For
- What You Will Learn
- What's New in the Second Edition
- Conventions Used in This Book
- Using Code Examples
- O'Reilly Online Learning
- How to Contact Us
- Acknowledgments
- Part I. Introduction
- Chapter 1. Exam Details and Resources
- Kubernetes Certification Learning Path
- Kubernetes and Cloud Native Associate (KCNA)
- Kubernetes and Cloud Native Security Associate (KCSA)
- Certified Kubernetes Application Developer (CKAD)
- Certified Kubernetes Administrator (CKA)
- Certified Kubernetes Security Specialist (CKS)
- Exam Objectives
- Curriculum
- Application Design and Build
- Application Deployment
- Application Observability and Maintenance
- Application Environment, Configuration, and Security
- Services and Networking
- Involved Kubernetes Primitives
- Documentation
- Exam Environment and Tips
- Candidate Skills
- Time Management
- Command-Line Tips and Tricks
- Setting a Context and Namespace
- Using the Alias for kubectl
- Using kubectl Command Auto-Completion
- Internalize Resource Short Names
- Practicing and Practice Exams
- Summary
- Chapter 2. Kubernetes in a Nutshell
- What Is Kubernetes?
- Features
- High-Level Architecture
- Control Plane Node Components
- Common Node Components
- Advantages
- Summary
- Chapter 3. Interacting with Kubernetes
- API Primitives and Objects
- Using kubectl
- Managing Objects
- Imperative Object Management
- Declarative Object Management
- Hybrid Approach
- Which Approach to Use?
- Summary
- Part II. Application Design and Build
- Chapter 4. Containers
- Container Terminology
- Containerizing a Java-Based Application
- Writing a Dockerfile
- Building the Container Image
- Listing Container Images
- Running the Container
- Listing Containers
- Interacting with the Container
- Publishing the Container Image
- Saving and Loading a Container Image
- Going Further
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 5. Pods and Namespaces
- Working with Pods
- Creating Pods
- Listing Pods
- Pod Life Cycle Phases
- Rendering Pod Details
- Accessing Logs of a Pod
- Executing a Command in Container
- Creating a Temporary Pod
- Using a Pod's IP Address for Network Communication
- Configuring Pods
- Deleting a Pod
- Working with Namespaces
- Listing Namespaces
- Creating and Using a Namespace
- Setting a Namespace Preference
- Deleting a Namespace
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 6. Jobs and CronJobs
- Working with Jobs
- Creating and Inspecting Jobs
- Job Operation Types
- Restart Behavior
- Working with CronJobs
- Creating and Inspecting CronJobs
- Configuring Retained Job History
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 7. Volumes
- Working with Storage
- Volume Types
- Ephemeral Volumes
- Persistent Volumes
- Storage Classes
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 8. Multi-Container Pods
- Working with Multiple Containers in a Pod
- Init Containers
- The Sidecar Pattern
- The Adapter Pattern
- The Ambassador Pattern
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 9. Labels and Annotations
- Working with Labels
- Declaring Labels
- Inspecting Labels
- Modifying Labels for a Live Object
- Using Label Selectors
- Recommended Labels
- Working with Annotations
- Declaring Annotations
- Inspecting Annotations
- Modifying Annotations for a Live Object
- Reserved Annotations
- Summary
- Exam Essentials
- Sample Exercises
- Part III. Application Deployment
- Chapter 10. Deployments
- Working with Deployments
- Creating Deployments
- Listing Deployments and Their Pods
- Rendering Deployment Details
- Deleting a Deployment
- Performing Rolling Updates and Rollbacks
- Updating a Deployment's Pod Template
- Rolling Out a New Revision
- Adding a Change Cause for a Revision
- Rolling Back to a Previous Revision
- Scaling Workloads
- Manually Scaling a Deployment
- Autoscaling a Deployment
- Creating Horizontal Pod Autoscalers
- Listing Horizontal Pod Autoscalers
- Rendering Horizontal Pod Autoscaler Details
- Defining Multiple Scaling Metrics
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 11. Deployment Strategies
- Rolling Deployment Strategy
- Implementation
- Use Cases and Trade-Offs
- Fixed Deployment Strategy
- Implementation
- Use Cases and Trade-Offs
- Blue-Green Deployment Strategy
- Implementation
- Use Cases and Trade-Offs
- Canary Deployment Strategy
- Implementation
- Use Cases and Trade-Offs
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 12. Helm
- Managing an Existing Chart
- Identifying a Chart
- Adding a Chart Repository
- Searching for a Chart in a Repository
- Installing a Chart
- Listing Installed Charts
- Upgrading an Installed Chart
- Uninstalling a Chart
- Summary
- Exam Essentials
- Sample Exercises
- Part IV. Application Observability and Maintenance
- Chapter 13. API Deprecations
- Understanding the Deprecation Policy
- Listing Available API Versions
- Handling Deprecation Warnings
- Handling a Removed or Replaced API
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 14. Container Probes
- Working with Probes
- Probe Types
- Health Verification Methods
- Health Check Attributes
- The Readiness Probe
- The Liveness Probe
- The Startup Probe
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 15. Troubleshooting Pods and Containers
- Troubleshooting Pods
- Retrieving High-Level Information
- Inspecting Events
- Using Port Forwarding
- Troubleshooting Containers
- Inspecting Logs
- Opening an Interactive Shell
- Interacting with a Distroless Container
- Inspecting Resource Metrics
- Summary
- Exam Essentials
- Sample Exercises
- Part V. Application Environment, Configuration, and Security
- Chapter 16. CustomResourceDefinitions (CRDs)
- Working with CRDs
- Example CRD
- Implementing a CRD Schema
- Instantiating an Object for the CRD
- Discovering CRDs
- Implementing a Controller
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 17. Authentication, Authorization, and Admission Control
- Processing a Request
- Authentication with kubectl
- The Kubeconfig
- Managing Kubeconfig Using kubectl
- Authorization with Role-Based Access Control
- RBAC Overview
- Understanding RBAC API Primitives
- Default User-Facing Roles
- Creating Roles
- Listing Roles
- Rendering Role Details
- Creating RoleBindings
- Listing RoleBindings
- Rendering RoleBinding Details
- Seeing the RBAC Rules in Effect
- Namespace-Wide and Cluster-Wide RBAC
- Working with Service Accounts
- The Default Service Account
- Creating a Service Account
- Setting Permissions for a Service Account
- Admission Control
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 18. Resource Requirements, Limits, and Quotas
- Working with Resource Requirements
- Defining Container Resource Requests
- Defining Container Resource Limits
- Defining Container Resource Requests and Limits
- Working with Resource Quotas
- Creating ResourceQuotas
- Rendering ResourceQuota Details
- Exploring a ResourceQuota's Runtime Behavior
- Working with Limit Ranges
- Creating LimitRanges
- Rendering LimitRange Details
- Exploring a LimitRange's Runtime Behavior
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 19. ConfigMaps and Secrets
- Working with ConfigMaps
- Creating a ConfigMap
- Consuming a ConfigMap as Environment Variables
- Mounting a ConfigMap as a Volume
- Working with Secrets
- Creating a Secret
- Consuming a Secret as Environment Variables
- Mounting a Secret as a Volume
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 20. Security Contexts
- Working with Security Contexts
- Defining a Security Context on the Pod Level
- Defining a Security Context on the Container Level
- Defining a Security Context on the Pod and Container Level
- Summary
- Exam Essentials
- Sample Exercises
- Part VI. Services and Networking
- Chapter 21. Services
- Working with Services
- Service Types
- Port Mapping
- Creating Services
- Listing Services
- Rendering Service Details
- The ClusterIP Service Type
- Creating and Inspecting the Service
- Accessing the Service
- The NodePort Service Type
- Creating and Inspecting the Service
- Accessing the Service
- The LoadBalancer Service Type
- Creating and Inspecting the Service
- Accessing the Service
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 22. Ingresses
- Working with Ingresses
- Installing an Ingress Controller
- Deploying Multiple Ingress Controllers
- Configuring Ingress Rules
- Creating Ingresses
- Defining Path Types
- Listing Ingresses
- Rendering Ingress Details
- Accessing an Ingress
- Summary
- Exam Essentials
- Sample Exercises
- Chapter 23. Network Policies
- Working with Network Policies
- Installing an Network Policy Controller
- Creating a Network Policy
- Listing Network Policies
- Rendering Network Policy Details
- Applying Default Network Policies
- Restricting Access to Specific Ports
- Summary
- Exam Essentials
- Sample Exercises
- Appendix A. Answers to Review Questions
- Chapter 4, Containers
- Chapter 5, Pods and Namespaces
- Chapter 6, Jobs and CronJobs
- Chapter 7, Volumes
- Chapter 8, Multi-Container Pods
- Chapter 9, Labels and Annotations
- Chapter 10, Deployments
- Chapter 11, Deployment Strategies
- Chapter 12, Helm
- Chapter 13, API Deprecations
- Chapter 14, Container Probes
- Chapter 15, Troubleshooting Pods and Containers
- Chapter 16, Custom Resource Definitions (CRDs)
- Chapter 17, Authentication, Authorization, and Admission Control
- Chapter 18, Resource Requirements, Limits, and Quotas
- Chapter 19, ConfigMaps and Secrets
- Chapter 20, Security Contexts
- Chapter 21, Services
- Chapter 22, Ingresses
- Chapter 23, Network Policies
- Appendix B. Exam Review Guide
- Application Design and Build
- Application Deployment
- Application Observability and Maintenance
- Application Environment, Configuration, and Security
- Services and Networking
- About the Author
- Colophon
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