Python in a container with Gunicorn

https://code.visualstudio.com/docs/containers/quickstart-python

Use Docker Compose with docker-compose.debug.yml

https://code.visualstudio.com/docs/containers/docker-compose#_debug

tasks.json

  1. {
  2.     "version": "2.0.0",
  3.     "tasks": [
  4.         {
  5.             "type": "docker-build",
  6.             "label": "docker-build",
  7.             "platform": "python",
  8.             "dockerBuild": {
  9.                 "tag": "helloflask:latest",
  10.                 "dockerfile": "${workspaceFolder}/Dockerfile",
  11.                 "context": "${workspaceFolder}",
  12.                 "pull": true
  13.             }
  14.         },
  15.         {
  16.             "type": "docker-run",
  17.             "label": "docker-run: debug",
  18.             "dependsOn": [
  19.                 "docker-build"
  20.             ],
  21.             "dockerRun": {
  22.                 "env": {
  23.                     "FLASK_APP": "app.py",
  24.                     "FLASK_ENV": "development"
  25.                 },
  26.                 "volumes": [
  27.                     {
  28.                         "containerPath": "/app", "localPath": "${workspaceFolder}"
  29.                     }
  30.                 ]
  31.             },
  32.             "python": {
  33.                 "args": [
  34.                     "run",
  35.                     "--host", "0.0.0.0",
  36.                     "--port", "5000"
  37.                 ],
  38.                 "module": "flask"
  39.             }
  40.         }
  41.     ]
  42. }

launch.json

  1. {
  2.   // Use IntelliSense to learn about possible attributes.
  3.   // Hover to view descriptions of existing attributes.
  4.   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  5.   "version": "0.2.0",
  6.   "configurations": [
  7.     {
  8.       "name": "Python: Remote Attach",
  9.       "type": "python",
  10.       "request": "attach",
  11.       "port": 5678,
  12.       "host": "localhost",
  13.       "pathMappings": [
  14.           {
  15.               "localRoot": "${workspaceFolder}",
  16.               "remoteRoot": "/app"
  17.           }
  18.       ]
  19.     },
  20.     {
  21.       "name": "Python: Flask",
  22.       "type": "python",
  23.       "request": "launch",
  24.       "module": "flask",
  25.       "env": {
  26.         "FLASK_APP": "app.py",
  27.         "FLASK_ENV": "development",
  28.         "FLASK_DEBUG": "0"
  29.       },
  30.       "args": [
  31.         "run",
  32.         "--no-debugger",
  33.         "--no-reload"
  34.       ],
  35.       "jinja": true
  36.     },
  37.     {
  38.       "name": "Docker: Python - Flask",
  39.       "type": "docker",
  40.       "request": "launch",
  41.       "preLaunchTask": "docker-run: debug",
  42.       "python": {
  43.         "pathMappings": [
  44.           {
  45.             "localRoot": "${workspaceFolder}",
  46.             "remoteRoot": "/app"
  47.           }
  48.         ],
  49.         "projectType": "flask"
  50.       }
  51.     }
  52.   ]
  53. }

docker-compose.debug.yml

  1. version: '3.4'
  3. services:
  4.   helloflask:
  5.     image: helloflask
  6.     build:
  7.       context: .
  8.       dockerfile: ./Dockerfile
  9.     command: ["sh", "-c", "pip install debugpy -t /tmp && python /tmp/debugpy --wait-for-client --listen 0.0.0.0:5678 -m flask run --no-debugger --no-reload --host 0.0.0.0 --port 5000"]
  10.     ports:
  11.       - 5000:5000
  12.       - 5678:5678
  13.     environment:
  14.       - FLASK_APP=app.py
  15.       - FLASK_ENV=development

docker-compose.yml

  1. version: '3.4'
  3. services:
  4.   helloflask:
  5.     image: helloflask
  6.     build:
  7.       context: .
  8.       dockerfile: ./Dockerfile
  9.     ports:
  10.       - 5000:5000
  11.     networks:
  12.       - net-proxy
  14. networks:
  15.   net-proxy:
  16.     # external: true，告知dockerd我们需要使用外部网络（卷、秘钥等也有类似操作），无需自动帮我创建net-proxy
  17.     external: true
  18.     # 告知dockerd我们使用my-proxy-net的网络，因此web服务可以与my-proxy-net容器互联
  19.     name: my-proxy-net

Dockerfile

  1. # For more information, please refer to https://aka.ms/vscode-docker-python
  2. FROM python:3.8-slim-buster
  4. EXPOSE 5000
  6. # Keeps Python from generating .pyc files in the container
  7. ENV PYTHONDONTWRITEBYTECODE=1
  9. # Turns off buffering for easier container logging
  10. ENV PYTHONUNBUFFERED=1
  12. # Install pip requirements
  13. ADD requirements.txt .
  14. RUN python -m pip install -r requirements.txt
  16. WORKDIR /app
  17. ADD . /app
  19. # Switching to a non-root user, please refer to https://aka.ms/vscode-docker-python-user-rights
  20. RUN useradd appuser && chown -R appuser /app
  21. USER appuser
  23. # During debugging, this entry point will be overridden. For more information, please refer to https://aka.ms/vscode-docker-python-debug
  24. CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app"]