Advanced Docker Training Course

Introduction

• Explore advanced Docker concepts and typical workflows
• Revisit fundamental containerization principles and real-world use cases
• Key Docker terminology and essential components
• Course goals and an overview of the hands-on environment

Docker Features and Architecture Overview

• The Docker Engine and its internal components
• Understanding the client, daemon, images, containers, and registries
• Docker architecture and the container lifecycle
• Docker Hub and the use of private registries
• Advanced Docker CLI usage
• Managing Docker resources and configuration settings

Setting Up Docker

• Installation of Docker Community Edition
• Configuring the Docker environment
• Validating the installation
• Tuning Docker for development and testing purposes
• Handling Docker configuration and storage
• Basics of troubleshooting the Docker environment

Creating Custom Docker Images

• Comprehending Docker images and layering
• Authoring effective Dockerfiles
• Dockerfile instructions and industry best practices
• Managing the build context
• Building and tagging images
• Utilizing .dockerignore
• Optimizing image size and build speed
• Managing image versions and tags
• Implementing multi-stage Docker builds
• Publishing images to a container registry

Managing Multi-Container Applications with Docker Compose

• Getting started with Docker Compose
• Defining services through Compose files
• Setting up networks and volumes
• Handling environment variables
• Managing service dependencies and startup sequences
• Running and scaling multiple services
• Building application images using Compose
• Managing application configurations
• Debugging multi-container setups
• Docker Compose best practices

Challenges in Deploying Numerous Docker Applications

• Managing containers across multiple hosts
• Ensuring application scaling and availability
• Implementing service discovery
• Configuring load balancing
• Managing configurations and secrets
• Addressing persistent storage challenges
• Monitoring and logging at scale
• Performing rolling updates and application deployments
• Recovering from container and host failures

Maintaining Control via Container Orchestration

• Introduction to container orchestration
• Advantages and constraints of orchestration
• Comparison of Docker Swarm, Kubernetes, and other platforms
• Scheduling and workload management
• Service discovery and networking
• Scaling and self-healing capabilities
• Executing rolling deployments and rollbacks
• Resource management and workload isolation
• Choosing the right orchestration platform

Kubernetes in Practice

• Kubernetes architecture and core elements
• Pods, nodes, and cluster structure
• Deployments and ReplicaSets
• Services and service discovery
• ConfigMaps and Secrets
• Namespaces and resource organization
• Application scaling
• Rolling updates and rollbacks
• Foundations of Kubernetes networking
• Persistent storage solutions
• Health checks and application resilience
• Deploying Docker applications to Kubernetes
• Troubleshooting Kubernetes workloads

Advanced Docker Networking

• Docker networking architecture
• Bridge, host, overlay, and other network drivers
• Container-to-container communication
• Interactions between containers and external systems
• Creating custom Docker networks
• Network isolation strategies
• Service discovery mechanisms
• Port publishing and exposure
• Networking in multi-host setups
• Troubleshooting Docker networking issues

Docker Security

• Foundations of Docker security
• Container isolation and security boundaries
• Running containers with appropriate privileges
• Managing users and permissions within containers
• Linux capabilities and security controls
• Securing Docker images
• Scanning for image vulnerabilities
• Secure management of secrets
• Protecting Docker registries
• Network security and isolation
• Docker daemon security
• Best practices for container security

Establishing a Continuous Integration Workflow for Docker

• Introduction to CI for containerized apps
• Automating Docker image builds
• Automated testing of images and containers
• Image tagging and version control
• Linking source control with Docker builds
• Automated vulnerability scanning
• Publishing images to registries
• Managing build artifacts
• Implementing automated quality checks
• Designing reproducible Docker CI pipelines

Integrating Docker Applications into Existing Workflows

• Embedding Docker into current development workflows
• Containerizing legacy applications
• Connecting Docker with CI/CD platforms
• Managing dev, test, staging, and production environments
• Automated deployment strategies
• Configuration management across environments
• Registry integration
• Deployment approvals and release management
• Monitoring application deployments
• Ensuring consistency across environments

Best Practices for Containers and Orchestration

• Designing maintainable Docker images
• Optimizing container startup and performance
• Container lifecycle management
• Effective resource allocation
• Logging and monitoring strategies
• Configuration and secret management
• High availability and fault tolerance
• Scaling containerized applications
• Secure container deployment
• Versioning and release strategies
• Orchestration architecture best practices

Troubleshooting

• Diagnosing container startup failures
• Analyzing application and container logs
• Inspecting containers and images
• Troubleshooting network issues
• Resolving storage and volume problems
• Diagnosing image build failures
• Troubleshooting Docker Compose applications
• Investigating resource and performance bottlenecks
• Basics of Kubernetes troubleshooting
• Practical troubleshooting exercises

Summary and Conclusion

• Recap of key Docker concepts
• Review of image creation and container management
• Review of multi-container application deployment
• Review of orchestration concepts and Kubernetes
• Review of Docker networking and security
• Review of CI/CD integration
• Best practices for containerization and orchestration
• Final hands-on exercise
• Q&A and discussion