Question

我正在尝试为Python Flask应用程序构建Docker镜像，但是存在构建问题 - 所有文件都存在于名为web的文件夹中 - 这是项目结构：

web/
    __init__.py
    app.py
    Dockerfile
    models.py
    requirements.txt

目前

和app.py看起来像这样：

from flask import Flask


app = Flask(__name__)

@app.route("/")
def hello_world():
    return "Hello World!"


if __name__ == "__main__":
    app.run(debug=True,host='0.0.0.0')

我已经从https://www.smartfile.com/blog/dockerizing-a-python-flask-application/借用了Dockerfile：

FROM ubuntu:14.04

# Update OS
RUN sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list
RUN apt-get update
RUN apt-get -y upgrade

# Install Python
RUN apt-get install -y python-dev python-pip

# Add requirements.txt
ADD requirements.txt /webapp

# Install wsgi Python web server
RUN pip install uwsgi
# Install app requirements
RUN pip install -r requirements.txt

# Create app directory
ADD . /webapp

# Set the default directory for our environment
ENV HOME /webapp
WORKDIR /webapp

# Expose port 8000 for uwsgi
EXPOSE 8000

ENTRYPOINT ["uwsgi", "--http", "0.0.0.0:8000", "--module", "app:app", "--processes", "1", "--threads", "8"]

我正在尝试使用docker build --no-cache --rm -t flask-app构建Docker镜像，但它以错误消息结束：

Successfully installed uwsgi
Cleaning up...
 ---> 9bbc004212a3
Removing intermediate container 70ed8f07c408
Step 8/13 : RUN pip install -r requirements.txt
 ---> Running in f5e2eb59ffd1
Could not open requirements file: [Errno 2] No such file or directory: 'requirements.txt'
Storing debug log for failure in /root/.pip/pip.log
The command '/bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1

Answer 1

我认为Dockerfile上的一个非常小的变化可以解决这个问题：

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"7138", "7165", "7168", "7169", "7180", "7181", "7224", "7225", 
"7229", "7232", "7241", "7242", "7249", "7414", "7418", "7465", 
"7467", "7469", "7472", "7474", "7477", "7479", "7524", "7536", 
"7570", "7579", "7588", "7600", "7604", "7938", "7997", "8001", 
"8006", "8022", "8037", "8041", "8045", "8053", "8058", "8061", 
"8062", "8068", "8077", "8078", "8082", "8084", "8085", "8089", 
"8092", "8093", "8105", "8117", "8126", "8132", "8133", "8139", 
"8140", "8144", "8155", "8162", "8163", "8167", "8173", "8176", 
"8178", "8181", "8184", "8186", "8188", "8196", "8199", "8201", 
"8203", "8206", "8207", "8222", "8227", "8231", "8234", "8236", 
"8249", "8253", "8254", "8274", "8280", "8282", "8286", "8287", 
"8295", "8299", "8305", "8307", "8309", "8321", "8323", "8325", 
"8332", "8393", "8426", "8443", "8461", "8463", "8482", "8497", 
"8500", "8515", "8519", "8523", "8553", "8564", "8575", "8589", 
"8638", "8653", "8672", "8678", "8692", "8694", "8699", "8755", 
"8777", "8793", "8795", "8817", "8823", "8825", "8841", "8846", 
"8852", "8867", "8906", "8918", "8928", "8939", "8946", "8950", 
"8961", "8972", "8973", "8975", "8976", "9019", "9024", "9051", 
"9056", "9064", "9076", "9080", "9094", "9097", "9098", "9109", 
"9111", "9124", "9128", "9142", "9158", "9168", "9169", "9175", 
"9179", "9182", "9185", "9186", "9187", "9189", "9191", "9195", 
"9196", "9197", "9200", "9201", "9204", "9210", "9226", "9240", 
"9251", "9253", "9254", "9255", "9264", "9271", "9279", "9281", 
"9282", "9288", "9293", "9304", "9313", "9315", "9317", "9320", 
"9325", "9327", "9332", "9336", "9343", "9344", "9346", "9347", 
"9348", "9352", "9357", "9363", "9365", "9368", "9371", "9375", 
"9378", "9380"), class = "omit"), .Names = c("tp", "f.ecdf"), row.names = c(NA, 
4L), class = "data.frame")

我刚刚添加了FROM ubuntu:14.04 # Update OS RUN sed -i 's/# $.*multiverse$$/\1/g' /etc/apt/sources.list RUN apt-get update RUN apt-get -y upgrade # Install Python RUN apt-get install -y python-dev python-pip # Add requirements.txt # Create app directory ADD . /webapp # Install wsgi Python web server RUN pip install uwsgi # Install app requirements # Full path to requirements RUN pip install -r /webapp/requirements.txt # Set the default directory for our environment ENV HOME /webapp WORKDIR /webapp # Expose port 8000 for uwsgi EXPOSE 8000 ENTRYPOINT ["uwsgi", "--http", "0.0.0.0:8000", "--module", "app:app", "--processes", "1", "--threads", "8"]的完整路径，这可以通过几种不同的方式完成，例如复制整个目录文件夹然后构建它。

Answer 2

在使用

添加需求之前，我替换了Dockerfile的初始行

FROM ubuntu:latest
RUN apt-get update -y
RUN apt-get install -y python-pip python-dev build-essential

它成功构建了图像。

$ docker images
REPOSITORY          TAG                 IMAGE ID                CREATED             SIZE
flask-app           latest              32b81efb5719        2 minutes ago       644.9 MB
ubuntu              latest              104bec311bcd        5 weeks ago         129 MB
$
$ docker run -d flask-app
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
73ae8baa93c2        flask-app       "uwsgi --http 0.0.0.0"   6 seconds ago       Up 5 seconds        8000/tcp            lucid_heyrovsky
$
$ docker inspect --format '{{ .NetworkSettings.IPAddress }}' 73ae8baa93c2
172.17.0.2

因此，当我尝试指向网址http://172.17.0.2:8000/时，我什么都没得到。

Answer 3

添加

WORKDIR /webapp

之前

RUN pip install -r requirements.txt

构建Python Flask应用程序的Docker镜像

3 个答案: