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NP-DK02: Build Image for a Python App

Project Overview

Create an optimized container image for a Python Flask-based catalogue service, focusing on Python-specific best practices and efficient dependency management.

Service Details​

Service Configuration
{
    "path": "/catalogue",
    "language": "Python",
    "framework": "Flask",
    "port": 5000,
    "build": "pip install -r requirements.txt",
    "launch": ["gunicorn", "--bind", "0.0.0.0:5000", "app:app"]
}

Technical Requirements​

Prerequisites​

  • Docker installed locally
  • Git for version control
  • Basic Python knowledge
  • Understanding of Flask
  • IDE or text editor
  • GitHub account
Base Repository

https://github.com/craftista/craftista

Implementation Requirements​

🐍 Python-Specific Considerations​

  • Virtual environment handling
  • Package dependency management
  • Gunicorn configuration
  • Flask development vs production

🔒 Security Measures​

  • Use minimal Python base image
  • Run as non-root user
  • Implement least privilege
  • Secure dependency management

⚡ Optimization Requirements​

  • Multi-stage build implementation
  • Python package caching
  • Layer optimization
  • Final image size reduction
Important Considerations
  • Handle Python environment variables
  • Configure Gunicorn properly
  • Implement health checks
  • Consider development workflow

Community Learning​

Weekly Schedule​

  • Monday: New project release
  • Thursday: Live Build Session on [YouTube Channel Link]
    • Python containerization demo
    • Flask-specific practices
    • Interactive problem-solving

Share Your Work​

Join the learning community on r/devopsbuilders:

  • Use "Devops Buildcamp" flair
  • Include PR-DK02 in post title
  • Share your approach
  • Discuss Python containerization
  • Help others learn
Remember

This is about learning together - share your experiences and learn from others!

Reference Commands​

Build & Run Commands
# Install dependencies
pip install -r requirements.txt

# Launch with Gunicorn
gunicorn --bind 0.0.0.0:5000 app:app

# Default port
5000

Best Practices Implementation Guide​

Python Container Setup​

Example Multi-Stage Structure
# Build stage
FROM python:3.9 AS builder
WORKDIR /app
COPY requirements.txt .
RUN pip install --user -r requirements.txt

# Production stage
FROM python:3.9-slim
WORKDIR /app
COPY --from=builder /root/.local /root/.local
COPY . .
ENV PATH=/root/.local/bin:$PATH
USER nobody
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app"]
Pro Tip

When working with Python containers, pay special attention to the virtual environment and dependency management!