docker - 如何在没有docker文件存在的情况下构建docker镜像

Question

Docker的新手。

运行这个docker build .
这是Dockerfile

FROM gcr.io/google_appengine/python

# Create a virtualenv for dependencies. This isolates these packages from
# system-level packages.
RUN virtualenv /env

# Setting these environment variables are the same as running
# source /env/bin/activate.
ENV VIRTUAL_ENV /env
ENV PATH /env/bin:$PATH

# Copy the application's requirements.txt and run pip to install all
# dependencies into the virtualenv.
#ADD requirements.txt /app/requirements.txt
#RUN pip install -r /app/requirements.txt

# Add the application source code.
ADD . /app

# Run a WSGI server to serve the application. gunicorn must be declared as
# a dependency in requirements.txt.
CMD gunicorn -b :$PORT main:app

CMD bash1  "while true; do echo hello; sleep 1;done"

CMD ["sh", "while true; do echo hello; sleep 1;done"]
CMD "echo" "Hello docker!"

但是之后，当我运行 docker ps时，我看不到图像。

Answer 1

使用'docker run'创建和运行容器。 docker构建所要做的就是创建一个镜像。