Hybrid Cloud Apps with OpenShift and Kubernetes: Delivering Highly Available Applications and Services

Cover
Copyright
Table of Contents
Foreword
Preface
	Why We Wrote This Book
	Who This Book Is For
	How This Book Is Organized
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Kubernetes and OpenShift Overview
	Kubernetes: Cloud Infrastructure for Orchestrating Containerized Applications
	CNCF Accelerates the Growth of the Kubernetes Ecosystem
	OpenShift: Red Hat’s Distribution of Kubernetes
		Benefits of OpenShift for Developers
		Benefits of OpenShift for IT Operations
	Summary
Chapter 2. Getting Started with OpenShift and Kubernetes
	Kubernetes Architecture
	Deployment Options for Kubernetes and OpenShift
		Red Hat’s CodeReady Containers
		IBM Cloud
		OpenShift Deployment Options
	Kubernetes and OpenShift Command-Line Tools
	Kubernetes Fundamentals
		What’s a Pod?
		How Do I Describe What’s in My Pod?
		Deployments
		Running the Pod and Deployment Examples in Production on OpenShift
		Service Accounts
	OpenShift Enhancements
		Authentication
		Projects
		Applications
		Security Context Constraints
		Image Streams
	Kubernetes and OpenShift Advanced Topics
		Webhooks
		Admission Controllers
		Role-Based Access Control
		Operators
	Summary
Chapter 3. Advanced Resource Management
	Pod Resources and Scheduling
		Driving Scheduler Decisions via Resource Requests
		Node Available Resources
		Scheduling
		Pod Priority and Preemption
	Post-Scheduling Pod Life Cycle
		Pod Quality of Service
		Pod QoS Levels
		Testing Resource Limits
		Node Eviction
	Capacity Planning and Management
		Kubernetes Worker Node Capacity
		Kubernetes Master Capacity
	Admission Controller Best Practices
		Standard Admission Controllers
		Admission Webhooks
	Summary
Chapter 4. Single Cluster Availability
	System Availability
		Measuring System Availability
		What Is a Highly Available System?
		OpenShift and Kubernetes Application and Service Availability
	Failure Modes
		Application Pod Failure
		Worker Node Failure
		Worker Zone Failure
		Control Plane Failure
		Network Failure
	Summary
Chapter 5. Continuous Delivery Across Clusters
	Helm
	Kustomize
		Generators
		Composition
		Patches
		Overlays
		Direct Deploy of Kustomize-Generated Resource Files
	GitOps
	Razee
	Argo CD
	Tekton
		Tasks
		Pipelines
	OpenShift Pipelines
	Open Cluster Management Apps
	Summary
Chapter 6. Multicluster Fleets: Provision and Upgrade Life Cycles
	Why Multicluster?
		Use Case: Using Multiple Clusters to Provide Regional Availability for Your Applications
		Use Case: Using Multiple Clusters for Multiple Tenants
		Use Case: Supporting Far-Edge Use Cases Where Clusters Do Not Run in Traditional Datacenters or Clouds
		Architectural Characteristics
	Provisioning Across Clouds
		User-Managed OpenShift
		Upgrading Your Clusters to the Latest Version of Kubernetes
		Summary of Multicloud Cluster Provisioning
		OpenShift as a Service
		Kubernetes as a Service
	Operating System Currency for Nodes
	Summary
Chapter 7. Multicluster Policy Configuration
	Configuring Your Cluster with Operators
		Understanding Operators
		Example: Container Security Operator
		Using Cluster Operators to Manage OpenShift
		Example: Configuring the Authentication Operator
		OpenShift htpasswd Identity Provider
	Policy and Compliance Across Multiple Clusters
		Policy Example: Federate a Project Across Your Fleet
		PlacementRules to Assign Content to ManagedClusters
		Policy Example: Managing etcd Encryption Within ManagedClusters
		Policy Example: Managing RBAC Within ManagedClusters
		Policy Example: Managing IdPs Within ManagedClusters
		Policy Example: Managing Upgrades with Policy Across ManagedClusters
	Summary
Chapter 8. Working Example of Multicluster Application Delivery
	Failure Is Inevitable
	Multicluster Load Balancing
	Automating Without Operators
	Deploying the Example Application
	Configure Your Hub Cluster
		Provision an OpenShift Cluster to Host the Open Cluster Management Hub
		Configure the Open Cluster Management Hub
		Provision Two or More Clusters to Host the Application
	Deploy Ansible Tower and the Ansible Resource Operator
		Configure Projects for ServiceNow and F5 DNS Load Balancer
		Configure the toweraccess Secret and Create the Ansible Tower Token
	Deploy the pacman-app Example to Your Cluster
	Summary
Chapter 9. The Future of Kubernetes and OpenShift
	Increased Migration of Legacy Enterprise Applications to Cloud Native Applications
	Increased Adoption of Kubernetes for High Performance Computing
	Kubernetes and OpenShift Will Become the De Facto Platforms for Machine Learning and Deep Learning
	Open Cloud Marketplaces Will Accelerate Adoption of Cloud Native Applications
	OpenShift Will Be the Platform for Enterprise Multicloud
	Recommended Resources
		IBM Developer Website
		Learn OpenShift
		Kubernetes Website
		Kubernetes IBM Cloud Provider Special Interest Group
		Kubernetes Contributor Experience Special Interest Group
	Summary
Index
About the Authors
Colophon