Dockerfile构建一个Python Flask 镜像
作者：小叶柏杉
这篇文章主要介绍了Dockerfile构建一个Python Flask 镜像，对正在学习的你有一定的参考价值，需要的小伙伴可以参考一下
1.Python 程序
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
return 'Hello, World!'
2.Dockerfile
FROM python:3.9.5-slim COPY app.py /src/app.py RUN pip install flask WORKDIR /src ENV FLASK_APP=app.py EXPOSE 5000 CMD ["flask", "run", "-h", "0.0.0.0"]
3.开始构建一个小的demo
PS E:\images> docker image build -f .\flask_dockerfile -t flask_py . [+] Building 80.3s (9/9) FINISHED => [internal] load build definition from flask_dockerfile 0.0s => => transferring dockerfile: 38B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/python:3.9.5-slim 12.7s => [internal] load build context 0.0s => => transferring context: 152B 0.0s => [1/4] FROM docker.io/library/python:3.9.5-slim@sha256:9828573e6a0b02b6d0ff0bae0716b027aa21cf8e59ac18a76724d2 47.4s => => resolve docker.io/library/python:3.9.5-slim@sha256:9828573e6a0b02b6d0ff0bae0716b027aa21cf8e59ac18a76724d21 0.0s => => sha256:f42d92068b29045b6893da82032ca4fcf96193be5dcbdcfcba948489efa9e832 1.37kB / 1.37kB 0.0s => => sha256:c71955050276b1e3b4be7e29089e4babeb39957981d162a3d422e084601105d3 7.63kB / 7.63kB 0.0s => => sha256:b4d181a07f8025e00e0cb28f1cc14613da2ce26450b80c54aea537fa93cf3bda 27.15MB / 27.15MB 44.7s => => sha256:a1111a8f2ec3f3a8ee44a123047349a70f87d1cfebb9e48b06520d0eed436a71 2.77MB / 2.77MB 9.3s => => sha256:445d04774519ca200f5c48fd028beaafb49ca763dd58767f1ae7e3933306394c 10.93MB / 10.93MB 32.9s => => sha256:9828573e6a0b02b6d0ff0bae0716b027aa21cf8e59ac18a76724d216bab7ef04 1.86kB / 1.86kB 0.0s => => sha256:24f3f85d41f368fc2dcd569b181ef6cd4c2bee419a32853be2f8c8964cee34af 235B / 235B 11.9s => => sha256:d299f7fb612d59c3d87fcb17028a25c02e94722ef6235e60537a12d0e312abfc 2.64MB / 2.64MB 17.4s => => extracting sha256:b4d181a07f8025e00e0cb28f1cc14613da2ce26450b80c54aea537fa93cf3bda 1.3s => => extracting sha256:a1111a8f2ec3f3a8ee44a123047349a70f87d1cfebb9e48b06520d0eed436a71 0.2s => => extracting sha256:445d04774519ca200f5c48fd028beaafb49ca763dd58767f1ae7e3933306394c 0.5s => => extracting sha256:24f3f85d41f368fc2dcd569b181ef6cd4c2bee419a32853be2f8c8964cee34af 0.0s => => extracting sha256:d299f7fb612d59c3d87fcb17028a25c02e94722ef6235e60537a12d0e312abfc 0.2s => [2/4] COPY app.py /src/app.py 0.1s => [3/4] RUN pip install flask 19.8s => [4/4] WORKDIR /src 0.0s => exporting to image 0.2s => => exporting layers 0.2s => => writing image sha256:0567a371be3f084fb413092b480735083c224023f8801fc723e228a021ea54b1 0.0s => => naming to docker.io/library/flask_py PS E:\images> docker images REPOSITORY TAG IMAGE ID CREATED SIZE flask_py latest 0567a371be3f 10 minutes ago 125MB PS E:\images> docker container run -d -p 5000:5000 0567a371be3f ceb69c7ce778ebcf48a0ad91eb16902814cb20470ddb16d0ba795baa18cf4b01
访问浏览器本地ip：http://127.0.0.1:5000/ 显示Hello, World!
查看容器日志：
PS E:\images> docker logs ceb69c7ce778 * Serving Flask app 'app.py' (lazy loading) * Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Debug mode: off * Running on all addresses. WARNING: This is a development server. Do not use it in a production deployment. * Running on http://172.17.0.2:5000/ (Press CTRL+C to quit) PS E:\images> docker logs ceb69c7ce778 * Serving Flask app 'app.py' (lazy loading) * Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Debug mode: off * Running on all addresses. WARNING: This is a development server. Do not use it in a production deployment. * Running on http://172.17.0.2:5000/ (Press CTRL+C to quit) 172.17.0.1 - - [13/Jan/2022 08:50:31] "GET / HTTP/1.1" 200 - 172.17.0.1 - - [13/Jan/2022 08:50:31] "GET /favicon.ico HTTP/1.1" 404 -
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