Containers Without the Magic
summary
Explains containers as a single bundled executable that freezes OS packages, Python and app code so it runs the same everywhere, compares virtualenv, LXC and Docker, and shows a concrete Dockerfile that pulls Python 3.6, copies code, installs requirements and sets the startup command; the workflow is docker build -> myapp image then docker run to execute the predefined process. Covers when containers help (multiple systems, multiple apps, distribution), when they cost more, and using immutable images for security updates.
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chapters (14)
- 0:00Start
- 1:24Common Answer = Dark Magic
- 1:49Real Answer = Bundle
- 2:44Running your Python app "normally"
- 3:34And then the gods created virtualenv
- 5:10Some tried to please the gods by sacrificing resources to virtual machines
- 5:39So the gods created containers
- 8:18Container Tech Comparison
- 9:05Thinking in terms of a LAMP stack
- 10:21Thinking in terms of Docker
- 11:34Visualized LAMP stack
- 12:00Visualized Docker stack
- 12:38Let's Dockerize your Python app
- 17:29Containers provide a way of bundling code AND system dependencies into one binary
