WA3007 Kubernetes for Developers Training
In this Kubernetes for Developers training course students learn how to containerize, host, deploy, and configure an application in a multi-node cluster.
Online Virtual Class
Students in this Kubernetes for Developers Training course will be working with network plugins, security and cloud storage, and will be exposed to many of the features needed to deploy an application in a production environment.
Objectives for Kubernetes for Developers Training
- Learn how to containerize and deploy a new Python script
- Understand and configure the deployment with ConfigMaps, Secrets and SecurityContexts
- Understand multi-container pod design
- Learn to configure probes for pod health
- Learn to update and roll back an application
- Understand how to implement services and set NetworkPolicies
- Learn how to use PersistentVolumeClaims for state persistence
Topics
- Kubernetes Core Concepts
- Kubernetes Architecture
- Docker
- Volumes
- Security
- Kubernetes Services
- Troubleshooting Kubernetes
Kubernetes for Developers Training Audience
This Kubernetes for Developers Training is intended for developers that need to understand all aspects of how to containerize, host, deploy, and configure an application in a multi-node cluster.
Prerequisites for Kubernetes for Developers Training
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.
Duration
Three days
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Outline for Kubernetes for Developers Training
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