Certified Kubernetes Administrator (CKA) Study Guide - Helion

ebook

Autor: Benjamin Muschko
ISBN: 9781098107178
stron: 204, Format: ebook
Data wydania: 2022-06-09
Księgarnia: Helion

Cena książki: 186,15 zł (poprzednio: 216,45 zł)
Oszczędzasz: 14% (-30,30 zł)

Osoby, które kupiły tę książkę, wybierały także »

The ability to administer and monitor a Kubernetes cluster is in high demand today. To meet this need, the Cloud Native Computing Foundation developed a certification exam to establish an administrator's credibility and value in the job market to confidently work in a Kubernetes environment.

The Certified Kubernetes Administrator (CKA) certification exam is different from the typical multiple-choice format of other professional certifications. Instead, the CKA is a performance-based exam that requires deep knowledge of the tasks under immense time pressure.

This study guide walks you through all the topics covered to fully prepare you for the exam. Author Benjamin Muschko also shares his personal experience with preparing for all aspects of the exam.

Learn when and how to apply Kubernetes concepts to administer and troubleshoot a production-grade cluster
Understand the objectives, abilities, and tips and tricks needed to pass the CKA exam
Explore the ins and outs of the kubectl command-line tool
Demonstrate competency to perform the responsibilities of a Kubernetes administrator
Solve real-world Kubernetes problems in a hands-on command-line environment
Effectively navigate and solve questions during the CKA exam

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Spis treści

Certified Kubernetes Administrator (CKA) Study Guide eBook -- spis treści

Preface
- Who This Book Is For
- What You Will Learn
- Conventions Used in This Book
- Using Code Examples
- OReilly Interactive Katacoda Labs
- OReilly Online Learning
- How to Contact Us
- Acknowledgments
1. Exam Details and Resources
- Exam Objectives
- Curriculum
  - Cluster Architecture, Installation, and Configuration
  - Workloads and Scheduling
  - Services and Networking
  - Storage
  - Troubleshooting
- Involved Kubernetes Primitives
- Exam Environment and Tips
- Candidate Skills
- Time Management
- Command-Line Tips and Tricks
  - Setting a Context and Namespace
  - Using an Alias for kubectl
  - Using kubectl Command Auto-Completion
  - Internalize Resource Short Names
  - Deleting Kubernetes Objects
  - Finding Object Information
  - Discovering Command Options
- Practicing and Practice Exams
- Summary
2. Cluster Architecture, Installation, and Configuration
- Role-Based Access Control
  - RBAC High-Level Overview
  - Creating a Subject
    - User accounts and groups
    - ServiceAccount
  - Listing ServiceAccounts
  - Rendering ServiceAccount Details
  - Assigning a ServiceAccount to a Pod
  - 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
  - Aggregating RBAC Rules
- Creating and Managing a Kubernetes Cluster
  - Installing a Cluster
    - Initializing the Control Plane Node
    - Joining the Worker Nodes
  - Managing a Highly Available Cluster
  - Upgrading a Cluster Version
    - Upgrading control plane nodes
    - Upgrading worker nodes
- Backing Up and Restoring etcd
  - Backing Up etcd
  - Restoring etcd
- Summary
- Exam Essentials
- Sample Exercises
3. Workloads
- Managing Workloads with Deployments
  - Understanding Deployments
  - Creating Deployments
  - Listing Deployments and Their Pods
  - Rendering Deployment Details
  - Deleting a Deployment
- Performing Rolling Updates and Rollbacks
  - Rolling Out a New Revision
  - Rolling Back to a Previous Revision
- Scaling Workloads
  - Manually Scaling a Deployment
  - Manually Scaling a StatefulSet
  - Autoscaling a Deployment
  - Creating Horizontal Pod Autoscalers
  - Listing Horizontal Pod Autoscalers
  - Rendering Horizontal Pod Autoscaler Details
  - Using the Beta API Version of an Horizontal Pod Autoscaler
- Defining and Consuming Configuration Data
  - Creating a ConfigMap
  - Consuming a ConfigMap as Environment Variables
  - Mounting a ConfigMap as a Volume
  - Creating a Secret
  - Consuming a Secret as Environment Variables
  - Mounting a Secret as a Volume
- Summary
- Exam Essentials
- Sample Exercises
4. Scheduling and Tooling
- Understanding How Resource Limits Affect Pod Scheduling
  - Defining Container Resource Requests
  - Defining Container Resource Limits
  - Defining Container Resource Requests and Limits
- Managing Objects
  - Declarative Object Management Using Configuration Files
    - Creating objects
    - Updating objects
    - Deleting objects
  - Declarative Object Management Using Kustomize
    - Composing Manifests
    - Generating manifests from other sources
    - Adding common configuration across multiple manifests
    - Customizing a collection of manifests
- Common Templating Tools
  - Using the YAML Processor yq
    - Reading values
    - Modifying values
    - Merging YAML files
  - Using Helm
    - Standard Chart Structure
    - The chart file
    - The values file
    - The template files
    - Executing Helm commands
- Summary
- Exam Essentials
- Sample Exercises
5. Services and Networking
- Kubernetes Networking Basics
- Connectivity Between Containers
- Connectivity Between Pods
- Understanding Services
- Service Types
- Creating Services
- Listing Services
- Rendering Service Details
- Port Mapping
- Accessing a Service with Type ClusterIP
- Accessing a Service with Type NodePort
- Accessing a Service with Type LoadBalancer
- Understanding Ingress
- Ingress Rules
- Creating Ingresses
- Defining Path Types
- Listing Ingresses
- Rendering Ingress Details
- Accessing an Ingress
- Using and Configuring CoreDNS
  - Inspecting the CoreDNS Pod
  - Inspecting the CoreDNS Configuration
  - Customizing the CoreDNS Configuration
- DNS for Services
  - Resolving a Service by Hostname from the Same Namespace
  - Resolving a Service by Hostname from a Different Namespace
- DNS for Pods
  - Resolving a Pod by Hostname
- Choosing an Appropriate Container Network Interface Plugin
- Summary
- Exam Essentials
- Sample Exercises
6. Storage
- Understanding Volumes
- Volume Types
- Creating and Accessing Volumes
- Understanding Persistent Volumes
- Static vs. Dynamic Provisioning
- Creating PersistentVolumes
- Configuration Options for a PersistentVolume
  - Volume Mode
  - Access Mode
  - Reclaim Policy
- Creating PersistentVolumeClaims
- Mounting PersistentVolumeClaims in a Pod
- Understanding Storage Classes
- Creating Storage Classes
- Using Storage Classes
- Summary
- Exam Essentials
- Sample Exercises
7. Troubleshooting
- Evaluating Cluster and Node Logging
  - Cluster Logging
    - Using a node logging agent
    - Using a sidecar container
    - Pushing directly to logging backend
  - Node Logging
- Monitoring Cluster Components and Applications
- Troubleshooting Application Failures
  - Troubleshooting Pods
    - Retrieving high-level information
    - Inspecting events
    - Inspecting logs
  - Opening an Interactive Shell
  - Troubleshooting Services
- Troubleshooting Cluster Failures
  - Troubleshooting Control Plane Nodes
    - Rendering cluster information
    - Inspecting control plane components
  - Troubleshooting Worker Nodes
    - Checking available resources
    - Checking the kubelet process
    - Checking the certificate
    - Checking the kube-proxy Pod
- Summary
- Exam Essentials
- Sample Exercises
8. Wrapping Up
Answers to Review Questions
- Chapter 2, Cluster Architecture, Installation, and Configuration
- Chapter 3, Workloads
- Chapter 4, Scheduling and Tooling
- Chapter 5, Services and Networking
- Chapter 6, Storage
- Chapter 7, Troubleshooting
Index