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# Docker Intro and Week 19 Roadmap

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## What is Docker
#### What are Docker containers?

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### Docker containers

- containers are isolated
- containers are ephemeral
- containers are lightweight
- containers are reproducible

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### Docker containers

- containers are isolated
- cannot interact with the rest of your computer, or other containers (except in specific ways)
- containers are ephemeral
- you make them when you need one, and you can get rid of them when you're done
- containers are lightweight
- single-purpose, only contain what they need
- containers are reproducible
- make the same container over and over again

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### Who and what is it useful for?
Many things...
- Collaboration
- Trying out new tools
- DevOps
- Scientists
- Deploying a website!

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## Docker topics
- Setup and practice navigating inside a container (today)
- Docker containers (Tuesday)
- Docker Images and Dockerfiles (Wednesday)
- Docker-compose (Thursday)
- Microservices (Optional)

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### Today
- set up Docker
- explore alpine linux
- a minimal linux distribution
- in this project
- no direct access to your computer's file system
- interactions through the command line

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### Docker containers (Tuesday)

- a docker container is a lightweight package which contains all the software and dependencies to run a single process
- we'll explore containers & use the command line interface to work with them

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### Docker images (Wednesday)

- docker images are templates for building docker containers
- allows you to make the same containers over and over
- you can customize an image using a Dockerfile

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### Docker-compose (Thursday)

- easily spin up a collection of containers, and configure them to communicate with one another

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### Friday

- multi-threading demo
- walkthrough the project skeleton
- group project planning

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### Today's itinerary [1/2]
Docker introduction:
- Watch this video, which is also listed under lecture for tomorrow: [12-minute Docker Overview](https://www.youtube.com/watch?v=YFl2mCHdv24)
- Non Technical Overview of Docker (reading)

Docker installation (if docker is not already installed):
- Docker Installation (reading)
- If you want to test your installation:
- `docker container run --rm hello-world`

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### Today's itinerary [2/2]

Docker project:
- Installing Packages on Alpine Linux (video)
- Notes for Installing Packages on Alpine Linux (reading)
- Linux Basics (reading)
- Trying Out Alpine Linux (project)