Martin Kubernetes

Preparing for the CKA and CKAD Certifications
1. Auflage 2020
ISBN: 978-1-4842-6494-2
Verlag: APRESS
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 231 Seiten, eBook

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.

What You Will Learn

• 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

Who This Book Is For

Administrators and application developers with good knowledge of micro-services development and deployment.

Zielgruppe

Professional/practitioner

Autoren/Hrsg.

Martin, Philippe

Inhaltsverzeichnis

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

Über Autor(innen)

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.