2017-09-15 84 views
0

我正在構建一個簡單的應用程序使用:Dockerfileapp.pyrequirements.txt。當Dockerfile生成時,我得到錯誤:「沒有這樣的文件或目錄」。但是,當我在Dockerfile中將ADD更改爲COPY時,它起作用。你知道這是爲什麼嗎?泊塢窗:沒有閱讀文件

我使用教程:https://docs.docker.com/get-started/part2/#define-a-container-with-a-dockerfile

error error fixed

App.py

from flask import Flask 
    from redis import Redis, RedisError 
    import os 
    import socket 

    # Connect to Redis 
    redis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2) 

    app = Flask(__name__) 

    @app.route("/") 
    def hello(): 
     try: 
      visits = redis.incr("counter") 
     except RedisError: 
      visits = "<i>cannot connect to Redis, counter disabled</i>" 

     html = "<h3>Hello {name}!</h3>" \ 
       "<b>Hostname:</b> {hostname}<br/>" \ 
       "<b>Visits:</b> {visits}" 
     return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits) 

if __name__ == "__main__": 
    app.run(host='0.0.0.0', port=80) 

requirements.txt

Flask 
Redis 

Dockerfile

# Use an official Python runtime as a parent image 
FROM python:2.7-slim 

# Set the working directory to /app 
WORKDIR /app 

# Copy the current directory contents into the container at /app 
ADD . /app 

# Install any needed packages specified in requirements.txt 
RUN pip install -r requirements.txt 

# Make port 80 available to the world outside this container 
EXPOSE 80 

# Define environment variable 
ENV NAME World 

# Run app.py when the container launches 
CMD ["python", "app.py"] 
+0

你能告訴的都建立日誌是正確的? –

+0

複製你的Dockerfile,並嘗試構建,一切正常,你的'requirements.txt'和'Dockerfile'一起? –

回答

1

在第一次運行,你的工作目錄是/app內部容器,複製內容/tmp。要糾正這種行爲,您應該將內容複製到/app,它會正常工作。

第二個,你在哪裏使用add,因爲您要添加內容/app,而不是/tmp