This guide explains how to build, debug, inspect, and deploy Docker containers with a focus on real-world tasks like transferring images to edge devices (e.g., Orange Pi).

🧱 1. Build a Docker Image from a Dockerfile

Use the following command to build a Docker image from a Dockerfile:

docker build -t my_image_name .

Debugging During Build

• Add temporary steps inside your Dockerfile:

  RUN ls -R /app
  RUN cat /app/somefile.txt
  

• Use verbose output for troubleshooting:

Best Practices in DevOps

DevOps bridges development and operations, improving software delivery through automation, collaboration, and continuous improvement. Here are some core best practices:

Continuous Integration (CI)

Continuous Integration is the process of automatically testing and validating code changes to maintain high code quality and catch issues early.

• Key Benefits:

  • Early bug detection
  • Improved code quality
  • Faster feedback loops

• Popular CI Tools:

  • GitHub Actions
  • Jenkins
  • GitLab CI
  • CircleCI
  • AWS CodeBuild

Continuous Delivery (CD)

Continuous Delivery automates the delivery of code to production or staging environments, often leveraging Infrastructure as Code (IaC) for reproducibility and reliability.