Once upon a time Kubernetes
Once upon a time Kubernetes
Container Orchestration
About the Book
This book is here to guide you on your journey to mastering container management at scale! Don't worry if you're new to Kubernetes; the chapters start with fundamentals and gradually build up to more advanced topics, making it easy to follow along and learn at your own pace.
Learning to manage containers at scale is achievable. You can download the Community Edition for free right now to see if the content meets your expectations. If your experience is positive, you can confidently purchase the complete version of the book.
The chapters follow a logical order based on Kubernetes architecture. We begin by explaining the basics, but the complexity increases as you progress. By the time you finish all the chapters, you will have a solid foundation of knowledge to tackle new professional challenges.
Resources used by this book to help you during the learning journey
- A Kubernetes cluster with multiple nodes running locally with no infrastructure costs.
- A load balancer simulator running locally with no infrastructure costs.
- Images throughout all chapters enhance your understanding of the concepts.
- Hands-on examples for each chapter to explore the concepts learned.
- Asciinema video links that support your practices.
- kubexercises tool with exercises at the end of chapters.
About the Author
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Table of Contents
- 1.About This Book
- How to use this book
- Source code and activities
- Exercises and activities
- Comments, suggestions, and recommendations
- 2.The Container Age
- What is Kubernetes?
- Kubernetes environments
- Create a cluster in 40 seconds
- Troubleshooting
- Deleting the cluster
- Summary
- 3.Kubernetes Architecture
- Control-plane components
- Data-plane components
- Kubernetes Add-ons
- Objects in the cluster
- kubectl command structure
- Summary
- 4.Pods
- First microservice up and running
- Checking the microservice logs
- Getting pod information
- Removing the pod
- Using environment variables
- Accessing the microservice
- Multiple microservices in a pod
- Activities to practice
- Summary
- 5.Labels
- Creating pods with labels
- Filtering pods using labels
- Performing actions on groups of pods
- Generating the pod structure
- Label recommendations
- Activities to practice
- Summary
- 6.ReplicaSets
- Specifications and startup
- Ensuring high availability
- Automatic restarts for applications
- Activities to practice
- Summary
- 7.Deployments
- Specifications and startup
- Updating applications with zero downtime
- Managing errors during application updates
- Distributing applications across nodes and regions
- Preventing service interruptions during node updates
- Deployment recommendations
- Activities to practice
- Summary
- 8.Services
- Specifications and startup
- Communication between applications
- Communication from external clients
- Load balancers
- Networks in Kubernetes
- Service recommendations
- Activities to practice
- Summary
- 9.Ingress
- Nginx as an Ingress controller
- Specifications and startup
- Using domain names
- Ingress class
- Ingress recommendations
- Summary
- 10.Gateway API
- Nginx as a Gateway controller
- Specifications and startup
- Blue/Green and Canary traffic segmentation
- Gateway API recommendations
- Summary
- 11.Namespaces
- Specifications and startup
- Grouping objects in namespaces
- Communication between applications
- Namespace recommendations
- Summary
- 12.Volumes
- Volume specifications within the pod
- Create a Kubernetes cluster
- EmptyDir volume type
- HostPath volume type
- External volumes to the cluster
- PersistentVolume
- PersistentVolumeClaim
- Workflow using PV and PVC
- Summary
- 13.ConfigMaps
- ConfigMap specifications
- Create a Kubernetes cluster
- Create/List/Read from terminal
- ConfigMap used as environment variable
- ConfigMap used as volume
- Generate ConfigMap structure
- Summary
- 14.Secrets
- Secret specifications
- Create a Kubernetes cluster
- Generate Secret structure
- Create/List/Read from terminal
- Secret used as environment variable
- Secret used as volume
- Summary
- 15.Role-Based Access Control (RBAC)
- Create a Kubernetes cluster
- Managing external users
- KUBECONFIG
- Roles and RoleBindings
- ClusterRoles and ClusterRoleBindings
- Service accounts
- Summary
- 16.Optimizing CPU and RAM
- Create a Kubernetes cluster
- Enable CPU and RAM metrics
- Setting resource boundaries
- Horizontal Pod Autoscaler (HPA)
- Summary
- 17.Using Kubernetes in the Cloud
- DOKS: DigitalOcean Kubernetes
- EKS: Amazon Elastic Kubernetes Service
- GKE: Google Kubernetes Engine
- Summary
- 18.Recommendations and Next Steps
- 1.About This Book
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