Docker Course

Few first command(s)

$ docker run hello-world $ docker run busybox echo "hello from busybox"

List all docker containers

$ docker ps -a

Connect to sh terminal of the container

$ docker run -it busybox sh

Running a simple static server

$ docker run -d -P --name static-site prakhar1989/static-site ^ name we want to give ^ this will publish all exposed ports to random ports ^ detach our terminal

Check ports of a container

$ docker port <container_name> $ docker port static-site

Stop a container

$ docker stop <container_name> $ docker stop static-site

Specifying custom ports

$ docker run -p 8888:80 prakhar1989/static-site

Get specific image version

$ docker pull ubuntu:18.04

Dockerfiles

They have to be named: Dockerfile

Content Example:

FROM python:3
# set a directory for the app
WORKDIR /usr/src/app   
# copy all the files to the container 
COPY . .               
# Install dependencies
RUN pip install --no-cache-dir -r requirements.txt 
EXPOSE 5000 
CMD ["python", "./app.py"]

In order to build our image we need to run this command in the same directory of the Dockerfile: $ docker build -t yourusername/test . ^ path where Dockerfile is. ^ custom tag name

Docker Compose - docker-compose.yml file

version: "3"
services:
  es:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: es 
    environment:
      - discovery.type=single-node
    ports:
      - 9200:9200
    volumes:
      - esdata1:/usr/share/elasticsearch/data
  web:
    image: omaryahir/myflaskprojectweb
    command: python app.py 
    depends_on:
      - es
    ports:
      - 5000:5000 
    volumes:
      - ./flask-app:/opt/flask-app 
volumes:
  esdata1:
    driver:loca`

omaryahir/docker_course