Docker镜像不能在指定的Python版本中运行

Question

我有一个Dockerfile

FROM python:3.7.12-slim-buster
FROM aaftio/face_recognition
RUN pip install redis
RUN pip3 install glob2
RUN pip install face_recognition
COPY ./worker.py /worker.py
COPY ./rediswq.py /rediswq.py
CMD  python3 worker.py

我构建映像并使用docker run -it {image_id}运行映像，但是我看到了python应用程序的错误-它抱怨f字符串语法，因为它从python 3.6开始支持I地址，它使用了一些旧的python。

我调试并得到python版本，它打印1.19.0

错误:

File "worker.py", line 14
for filename in glob.iglob(f"/root/divisions/{division_number}/" + '**/*.*', recursive=True):
^
SyntaxError: invalid syntax

我调试并执行whereis python3，输出为

python3: /usr/bin/python3.5m-config /usr/bin/python3.5 /usr/bin/python3 /usr/bin/python3.5-config /usr/bin/python3.5m /usr/lib/python3 /usr/lib/python3.5 /etc/python3.5 /etc/python3 /usr/local/bin/python3.4m-config /usr/local/bin/python3.4m /usr/local/bin/python3.4 /usr/local/bin/python3 /usr/local/bin/python3.4-config /usr/local/lib/python3.4 /usr/local/lib/python3.5 /usr/include/python3.5 /usr/include/python3.5m /usr/share/python3

Answer 1

错误在于您定义Dockerfile的方式

在创建docker多阶段构建时，您的最终容器将始终基于您引用的最后一个docker容器

在你的例子中，aaftio/face_recognition使用Python 3.4.9而不是python:3.7.12-slim-buster使用Python 3.7.12

docker多阶段构建参考-这里

你可以试试这样

FROM aaftio/face_recognition as intermediate
RUN pip install face_recognition

FROM python:3.7.12-slim-buster
#Copy the python installed libraries from intermediate container
#COPY --from=intermediate face_recognition
RUN pip install redis
RUN pip3 install glob2
COPY ./worker.py /worker.py
COPY ./rediswq.py /rediswq.py
CMD  python3 worker.py