Docker for beginner

Doker

Why docker

Development -> Testing -> Deploy
We need to give everything to testing team including dependency
But it is very hard becasue the entire OS need to ship to testing team

Previous
We use virtual image

What is Docker

give virtual image is too big and is wasting

Come up of containers taht runs on top of OS

Creating App on Docker

1. create docker-compose.yml

2. Dockerfile
   FROM python:3
   ENV PYTHONUNBUFFERED 1
   RUN mkdir /app
   WORKING /app
   COPY requirements.txt /app/
   RUN pip install -r requirements.txt

3. requirements.txt
   Django==2.2

4. docker-compose.yml
   version: ‘3’
   services:
   web:
   build: .
   command: python manage.py runserver 0.0.0.0:8000
   volumes:
   - .:/app
   ports:
   - “8000:8000”

5. docker-compose run web django-admin strartprojet mysite .

6. docker-compose up