Kubernetes: Preparing for the CKA and CKAD Certifications

ISBN-13: 9781484264935 / Angielski / Miękka / 2020 / 231 str.

Philippe Martin

Opis

Intermediate level professionals

Spis treści

Chapter 1: 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

Chapter 2: Control Plane Components

• Explore the Control Plane services

Chapter 3: Accessing the Cluster

• Install kubectl on your dev machine

• Access the cluster from the dev machine

Chapter 4: Kubernetes Resources

• Namespaces

• Labels and selectors

• Annotations

Chapter 5: The Workloads

• Pod specs

• Container specs

• Pod controllers

• ReplicaSet controller

• Deployment controller

• Update and rollback

• Deployment strategies

Chapter 6: Configuring Applications

• 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

Chapter 7: Scaling an Application

• Manual scaling

• Auto-scaling

Chapter 8: Application Self-Healing

• Controller to the rescue

• Liveness probes

• Resource limits and quality of service classes

Chapter 9: Scheduling Pods

• Using label selectors to schedule pods on specific nodes

• DaemonSets

• Static pods

• Resource requests

• Running multiple schedulers

Chapter 10: Discovery and Load Balancing

• Services

• Services types

• Ingress

Chapter 11: Security

• Authentication

• Authorization

• Security contexts

• Network policies

• Working with private Docker registries

Chapter 12: Storage

• Persistent volumes

• Claiming a persistent volume

• Using auto-provisioned persistent volumes

Chapter 13: Monitoring and Logging

• Basic logging

Chapter 14: Upgrading the Cluster

• Upgrade the controller

• Upgrade the workers

• Upgrading the operating system

• Backup a cluster

• Restore a cluster

Chapter 15: kubectl

• Managing kubeconfig file

• Generic commands

• Creating applications resources

• Managing clusters

• Getting documentation

A. Curriculum CKA

B. Curriculum CKAD

O autorze

Philippe Martin has been working with Kubernetes for three years, first by creating an operator to deploy video CDNs into the cloud, later helping companies deploy their applications into Kubernetes. Philippe passed the CKAD certification about a year ago and the CKA certification recently.

He has long experience with distributed systems and open-source software: he started his career 20 years ago creating thin clients based on the Linux kernel and open source components.

Philippe is active in the development of Kubernetes, especially its documentation, and participates in the translation of the official documentation into French, has edited two reference books about the Kubernetes API and kubectl, and is responsible for the French translation of the Kubernetes Dashboard.

Blurb

Master all the concepts and tools necessary to start administering a Kubernetes cluster and deploying applications to production. You will cover the entire curricula of the two Kubernetes certifications (for application developers and administrators).

The initial chapters guide you through deployment of a Kubernetes cluster on virtual machines and explore the different components of the control plane. Next, you will work with the kubectl command-line tool; namespaces, labels, selectors, and annotations—common resources used through the Kubernetes API. The following chapters describe the principle of controllers and detail how workload controllers work as well as the possibilities for configuring deployed applications.

You will also learn how to deploy a scalable and self-healing application, how pods are scheduled to nodes, how parts of the application can communicate, and how the application is discoverable from the outside. Next, you will cover security concerns describing the different authentication methods, the RBAC authorization mode, security contexts, network policies, and how to secure container images. You will also cover using persistent volumes for your containers to store long-term data, monitoring your clusters and applications and implementing design patterns for multi-container pods. The concluding chapters guide you through the upgrade of your deployed cluster.

After reading this book, you will have enough knowledge to deploy a complex application using a Kubernetes cluster and be ready for the certification exams.

You will:

• Deploy a Kubernetes cluster with kubeadm and learn how the control plane works
• Discover how the Kubernetes API is structured
• Deploy secure, auto-scaled, and self-healing applications
• Master the kubectl command-line tool