Kubernetes for Developers Virtual Classroom Live January 20, 2025

Course Overview

Chapter 1. Kubernetes Core Concepts

• Kubernetes Basics
• What is Kubernetes?
• Container Orchestration
• Kubernetes Architecture
• Kubernetes Concepts
• Cluster and Namespace
• Nodes
• Master
• Pod
• Using Pods to Group Containers
• Label
• Label Syntax
• Annotation
• Label Selector
• Replication Controller and Replica Set
• Service
• Storage Volume
• Secret
• Resource Quota
• Authentication and Authorization
• Routing
• Docker Registry
• Summary

Chapter 2. Kubernetes Architecture

• Architecture Diagram
• Components
• Kubernetes Cluster
• Master Node
• Kube-Control-Manager
• Nodes
• Other Components
• Interacting with Kubernetes
• Summary

Chapter 3. Build

• What is Docker
• Where Can I Run Docker?
• Docker and Containerization on Linux
• Linux Kernel Features: cgroups and namespaces
• The Docker-Linux Kernel Interfaces
• Containerizing an Application
• Building a Docker Images using Dockerfile
• Sample Dockerfile
• Environment Variables
• Environment Variables - Example
• Arguments
• Multi-stage Builds
• Multi-stage Builds (Contd.)
• Stop at a Specific Build Stage
• RUN
• EXPOSE
• EXPOSE (Contd.)
• COPY
• ADD
• CMD
• ENTRYPOINT
• CMD vs. ENTRYPOINT
• VOLUME
• Build the Image
• Build the Image (contd.)
• .dockerignore
• Dockerfile – Best Practices
• Dockerfile - Best Practices (contd.)
• Published Ports
• Docker Documentation
• Docker Registry
• Hosting a Local Registry
• Hosting a Local Registry (contd.)
• Deploying to Kubernetes
• Deploying to Kubernetes (contd.)
• Running Commands in a Container
• Multi-Container Pod
• Multi-Container Pod (contd.)
• Summary

Chapter 4. Design

• Traditional Applications
• Virtual Machines
• Containerized Applications
• Decoupled Resources
• Transience
• Flexible Framework
• Application Resource Usage
• Measuring Resource Usage
• Docker Resource Usage Statistics
• Docker Container Resource Constraints
• Docker Run Command Resource Flags
• Using Label Selectors
• Equality Based Label Selector
• Set Based Label Selector
• Multi-Container Pods
• Sidecar Container
• Sidecar Container Uses
• Adapter Container
• Summary

Chapter 5. Deployment Configuration

• Introduction to Volumes
• Container OS file system storage
• Docker Volumes
• Kubernetes Volumes
• Volume Specs
• K8S Volume Types
• Cloud Resource Types
• emptyDir
• Using an emptyDir Volume
• Other Volume Types
• Persistent Volumes
• Creating a Volume
• Persistent Volume Claim
• Persistent Volume
• Pod that uses Persistent Volume
• Dynamic Volume Provisioning
• Requesting Dynamic Storage
• Secrets
• Creating Secrets from Files
• Creating Secrets from Literals
• Using Secrets
• configMaps
• Creating configMaps from Literals
• Creating configMaps from files
• Using configMaps
• Security Context
• Security Context Usage
• Deployment Configuration Status
• Replicas
• Scaling
• Rolling Updates
• Summary

Chapter 6. Security

• Security Overview
• API Server
• API & Security
• ~/.kube/config
• ~/.kube/config (contd.)
• Kubernetes Access Control Layers
• Authentication
• Authorization
• ABAC Authorization
• ABAC - Policy Format
• ABAC - Examples
• RBAC Authorization
• Role and ClusterRole
• Role - Example
• ClusterRole - Example
• RoleBinding and ClusterRoleBinding
• RoleBinding - Example
• ClusterRoleBinding - Example
• Authorization Modes - Node
• Authorization Modes - ABAC
• Admission Controller
• Network Policies
• Network Policies - Examples
• Network Policies - Pod Isolation
• Network Policies - Internet Access for Pods
• Network Policies - New Deployments
• Summary

Chapter 7. Exposing Applications

• Kubernetes Services
• Service Resources
• Service Type
• ClusterIP
• NodePort
• NodePort from Service Spec
• LoadBalancer
• LoadBalancer from Service Spec
• ExternalName
• Accessing Applications
• Service Without a Selector
• Ingress
• Ingress Resource Example
• Ingress Controller
• Service Mesh
• Summary

Chapter 8. Troubleshooting Kubernetes

• Troubleshooting Overview
• Objects in Kubernetes
• Relationships in Kubernetes
• Operations in Kubernetes
• Understanding the Issue
• Troubleshooting Tools
• Troubleshooting Commands
• Troubleshooting Pods
• Troubleshooting the Cluster
• Cluster Failure Modes
• Monitoring
• Monitoring Applications
• Accessing Logs
• Logging Tools
• Conformance Testing
• Summary

Lab Exercises

• Lab 1. Creating a Docker Account and Obtain an Access Token
• Lab 2. Configuring Minikube/Kubernetes to Use a Custom Docker Account
• Lab 3. Getting Started with Kubernetes
• Lab 4. Building a Docker Image with Dockerfile
• Lab 5. Deploying to Kubernetes
• Lab 6. Implementing the Sidecar Pattern
• Lab 7. Deploying Applications
• Lab 8. Implementing RBAC Security
• Lab 9. Accessing Applications
• Lab 10. Troubleshooting

Prerequisites

WA2675 Architecting Microservices with Kubernetes, Docker, and Continuous Integration Training – or equivalent experience.  Students should be familiar with a programming language and be comfortable with basic Linux command line and file editing skills.