working_with_docker_container.md

Working with Docker container

A Docker container image is a lightweight, standalone, executable package of software that includes everything needed 
to run an application: code, runtime, system tools, system libraries and settings

Explore here: https://www.docker.com/resources/what-container/#:~:text=A%20Docker%20container%20image%20is,tools%2C%20system%20libraries%20and%20settings.

Docker Compose

Compose is a tool for defining and running multi-container Docker applications. 
With Compose, you use a YAML file to configure your application’s services. 
Then, with a single command, you create and start all the services from your configuration.

Explore here: https://docs.docker.com/compose/

Exercise

   - Create a new docker file.
     
            FROM python:3.10.2-alpine3.15
            # Create directories  
            RUN mkdir -p /root/workspace/src
            COPY ./web_scraping_sample.py  /root/workspace/src
            # Switch to project directory
            WORKDIR /root/workspace/src
            # Install required packages
            RUN pip install --upgrade pip
            RUN pip install requests bs4 html5lib

Build docker image
docker build --no-cache --network=host ./ -t workshop1 

Create a docker-compose file.
Filename: docker-compose.yml
     
version: "3"
services:
 python_service:
   build:
     context: ./
     dockerfile: Dockerfile
   image: workshop1
   container_name: workshop_python_container
   stdin_open: true #  docker attach container_id
   tty: true
   ports:
    - "8000:8000"
   volumes:
    - .:/app
              

Get the containers up.
     docker-compose up -d

Login to the container.
     docker exec -it workshop_python_container sh

Run the script for web scrapping inside the container.
     python web_scraping_sample.py