Docker Practice Guide
29 posts in this series
Dockerfile Tutorial for Beginners: Build Your First Docker Image from Scratch
A hands-on guide to writing Dockerfiles. Learn FROM, RUN, COPY and other core instructions, avoid common beginner pitfalls, with a complete Node.js example. Start writing Dockerfiles for your projects today!
Docker vs Virtual Machines: A 5-Minute Guide to Performance Differences and When to Use Each
Confused about choosing between Docker and VMs? This guide explains the core differences in plain English, provides real performance data, and offers a decision tree to help you make the right choice in 5 minutes.
Docker Installation Guide 2025: Complete Solutions from Permission Denied to Success
Wrestling with WSL 2 on Windows? Confused about Mac chip versions? Fighting Linux permissions? This guide covers 10+ common Docker installation errors across all three platforms with solutions that actually work.
Dockerfile Optimization: 5 Techniques to Reduce Image Size by 80%
Docker images ballooning to several GBs? Master 5 techniques - Alpine base images, merging RUN instructions, multi-stage builds, .dockerignore configuration, and cache cleanup - to shrink images from 1.2GB to 180MB, a 85% reduction. Complete Node.js optimization case study with real-world benchmarks included.
Docker Multi-Stage Builds: Shrinking Go/Java/Rust Images from GB to MB
A deep dive into Docker multi-stage build techniques with real-world examples showing how to optimize Go images by 98%, Java images by 86%, and Rust images by 99.4%. Complete Dockerfile code and lessons learned included.
Docker Volume Mastery: 5 Practical Examples to Solve Container Data Loss Forever
Learn Docker Volume through 5 hands-on examples, from basic concepts to MySQL and Redis persistence. Never lose container data again—perfect for Docker beginners and developers.
Docker Volume Backup and Migration Guide: 3 Methods Explained
A comprehensive guide to Docker volume backup methods: tar packaging, docker cp command, and automation tools. Includes database backup considerations, complete server migration workflow, and troubleshooting tips for reliable Docker data backup.
Docker Storage Solutions: Volume vs Bind Mount Decision Guide (with Performance Tests)
Deep dive into Docker's three mounting methods, solving the npm install performance issue on Mac (3.5x slower), with decision trees and real-world scenarios to help you choose between Volume, Bind Mount, and tmpfs
The Complete Guide to Docker Mount Permission Issues: From Diagnosis to 5 Practical Solutions
Can't delete files generated by containers? Permission Denied errors everywhere? Deep dive into the root causes of Docker permission issues with 5 solutions covering Linux/Mac/Windows differences and 5 real-world cases. Master 3 diagnostic commands and solve permission problems for good.
Docker Network Modes Explained: Performance Comparison and Scenario Selection of bridge/host/none/container
A comprehensive guide to Docker's four network modes (bridge/host/none/container), covering principles, performance comparison, and use cases, with practical examples and decision-making framework.
Docker Container Networking: How to Enable Communication Between Web and Database Containers
Learn how to connect Docker containers using custom networks. This practical guide shows you how to solve container name resolution failures and IP change issues, enabling stable communication between web and database containers with complete commands and troubleshooting tips.
Docker Port Mapping: Don't Let 'Port Already Allocated' Ruin Your Friday Night
From troubleshooting port conflicts to performance optimization, systematically solve all Docker port mapping pain points and say goodbye to port already allocated errors
Docker Container Host Access: Complete Guide to host.docker.internal
Can't connect from container to host services using localhost? This guide explains host.docker.internal usage across Mac/Windows/Linux with cross-platform configs and complete troubleshooting checklist.
Speed Up Docker Builds 10x: A Practical Guide to Cache Optimization
Master Docker layer caching, .dockerignore configuration, and Dockerfile optimization to reduce build time from 10 minutes to 30 seconds. Complete code examples and BuildKit cache mount guide included.
2025 Guide to Docker Mirror Sources in China: Fix Pull Timeout in 5 Minutes
After June 2024, Docker mirrors from Alibaba Cloud and NetEase Cloud became unavailable. This guide provides the latest working mirror sources (Xuanyuan Mirror, DaoCloud) as of December 2025, with step-by-step daemon.json configuration to fix Docker pull timeout issues.
Docker Compose Service Dependencies: Solving Database Startup Sequence with Healthchecks
A comprehensive guide to Docker Compose depends_on and healthcheck configuration with practical examples for PostgreSQL and MySQL to solve application startup failures caused by unready databases
Docker Compose Troubleshooting Guide: Quick Solutions for 5 Common Errors
Getting errors with Docker Compose? This guide covers 5 major issue types: port conflicts, network problems, build failures, container exits, and permission errors. Learn systematic troubleshooting with multiple solutions.
Deploy PHP Environment with Docker Compose: Complete DNMP Guide (Nginx+MySQL+PHP)
Learn how to deploy a DNMP (Docker+Nginx+MySQL+PHP) development environment with Docker Compose in 10 minutes. Solve team environment inconsistency issues with complete configuration files and troubleshooting guide included.
Complete Guide to Deploying Redis with Docker: Configure Persistence and Authentication to Prevent Data Loss
Step-by-step guide to deploying Redis with Docker, configuring RDB/AOF persistence and password authentication to prevent data loss after container restarts. Includes complete configuration files and code examples for production environments.
Complete Guide to Docker MySQL Deployment: From Data Persistence to Master-Slave Replication
Learn Docker MySQL deployment from data persistence to master-slave replication setup. Solve common issues like container restart data loss, configuration file mounting, and connection failures with production-ready solutions.
Complete Guide to Docker Nginx: Configuration File Mounting, HTTPS Setup, and Reverse Proxy
Complete tutorial on Docker Nginx deployment covering configuration file mounting, HTTPS certificate setup, and reverse proxy. Solves common issues like config not taking effect and container communication, includes Let's Encrypt auto-renewal and production best practices.
Docker Image Security Scanning and Vulnerability Remediation: Trivy Tutorial and CI/CD Integration Guide
76% of Docker Hub images contain security vulnerabilities. This comprehensive guide covers Trivy scanning tool usage, systematic vulnerability remediation methods, and CI/CD automation integration with complete command examples.
Docker Security Best Practices: Stop Running Containers as Root
Running Docker containers as root creates serious security risks. This comprehensive guide explains container escape vulnerabilities, provides complete security solutions including Dockerfile USER directive, --user parameter, Capabilities fine-grained permission control, and AppArmor configuration for production-grade secure containers.
The Complete Guide to Docker Secrets: Best Practices for Securely Managing Container Passwords and API Keys
Stop hardcoding database passwords in Dockerfiles! Learn how to securely manage sensitive data with Docker Secrets, compare Docker/K8s/Vault options, and get a complete production environment checklist.
The Complete Guide to Docker Resource Limits: Stop Memory Leaks from Crashing Your Server
How can a single container's memory leak bring down your entire server? From cgroups fundamentals to --memory and --cpus parameters, plus monitoring with docker stats, cAdvisor, and Prometheus—learn how to protect your production environment with proper resource limits.
Docker logs Command Guide: 7 Tips to Quickly Troubleshoot Container Issues
A comprehensive guide to docker logs command with 7 practical tips, including real-time monitoring, time filtering, grep search, log file locations, and production environment best practices.
Complete Guide to Docker Log Cleanup: 5 Ways to Prevent Disk from Being Filled by json.log
Docker log files growing continuously and filling up your disk? Learn how to clean up json.log files, configure log rotation, and choose the right log driver to solve Docker log disk space issues.
Docker Container Debugging Guide: The Right Way to Use exec Command
A complete guide to debugging Docker containers with exec command, covering exec vs attach differences, tool installation tips, user permission settings, and practical examples to help you troubleshoot container issues effectively.
Docker Container Exits Immediately? Complete Troubleshooting Guide (Exit Code 137/1 Solutions)
Does your Docker container exit immediately after starting? This comprehensive guide provides systematic troubleshooting methods, explains exit codes 137/1, offers a 4-step diagnosis process, and covers 5 common failure scenarios to help you quickly identify and fix container startup issues
