docker image 만들기

1. Dockerfile, app.py 를 준비

  https://github.com/mmumshad/simple-webapp-flask 을 참고해 

• Dockerfile
  

  FROM ubuntu:18.04
  
  ENV TZ=Asia/Seoul
  ENV LANG=ko_KR.UTF-8
  # ENV PATH="${PATH}:/home/windbird/.local/bin"
  
  # USER irteam
  # ADD --chown=irteam:irteam ./server/target/universal/stage /app/
  
  RUN apt-get update && apt-get install -y python python-pip
  RUN pip install --upgrade pip && pip install flask
  COPY app.py /opt/
  ENTRYPOINT FLASK_APP=/opt/app.py flask run \
    --host=0.0.0.0 \
    --port=8080

• app.py
  

   import os
   from flask import Flask
   app = Flask(__name__)
  
   @app.route("/")
   def main():
       return "Welcome!"
  
   @app.route('/how are you')
   def hello():
       return 'I am good, how about you?'
  
   if __name__ == "__main__":
       app.run(host="0.0.0.0", port=8080)
  ​

2. build 되는지 테스트 (Dockerfile 과 app.py 가 있는 디렉토리에서)

  docker build .

  혹은 docker build -f Dockerfile .

 

3. tag 붙이기

  docker build . -t my-org/my-web-app

  삭제할 때는 docker rmi my-org/my-web-app

  tag 이름을 변경할 때는 docker image tag my-org/my-web-app my-org/my-web-app2

 

4. 생성된 docker image 확인하기

  docker images

 

5. docker run

  docker run -p 8080:8080 my-org/my-web-app

  브라우저에서 http://myhost.com:8080/ 확인

 

6. docker registry 등록을 위해 로그인

  docker login

  docker registry 주소를 명시한다면  docker login reg.xxx.com -u username

 

7. docker push

  docker push my-org/my-web-app

 

8. Dockerfile (shell script 실행하기)

USER windbird
ADD --chown=windbird:windbird ./docker/setup.sh /app
RUN chmod u+x setup.sh
RUN ./setup.sh

 

참고: https://www.udemy.com/course/learn-docker/