[英]Docker: No such file or directory when trying to run docker inside docker
Is docker binaries not available within docker? Docker二进制文件在Docker中不可用吗? If so, how could I call it within docker? 如果是这样,我如何在docker中调用它?
app.py app.py
import subprocess
cmd_payload = ['docker']
subprocess.Popen(cmd_payload, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Dockerfile Docker文件
FROM python:2.7-slim
VOLUME /data
WORKDIR /data
ADD . /data
CMD ["python", "app.py"]
Then, run 然后跑
docker build -t app .
docker run app
OUTOUT: OUTOUT:
[Errno 2] No such file or directory
EDIT: if i change 编辑:如果我改变
cmd_payload = ['docker']
to 至
cmd_payload = ['echo']
it doesnt throw an error. 它不会引发错误。 I would like to run docker executable . 我想运行docker可执行文件。 How could i do that? 我该怎么办?
If you want to run docker within of a container, the easy way to reach that is share docker daemon by volumes, Re-run your docker container with this: 如果要在容器中运行docker,最简单的方法是按卷共享docker守护进程,请使用以下命令重新运行docker容器:
docker run -it -v /var/run/docker.sock:/var/run/docker.sock:ro -v /usr/bin/docker:/usr/bin/docker:ro app
Moreover you have to add the library to Dockerfile 此外,您必须将库添加到Dockerfile
FROM python:2.7-slim
RUN apt-get update && apt-get install -y libltdl7 && rm -rf /var/lib/apt/lists/*
VOLUME /data
WORKDIR /data
ADD . /data
CMD ["python", "app.py"]
subprocess was able to run docker executable by adding shell=True 子进程能够通过添加shell = True运行docker可执行文件
cmd_payload = 'docker'
subprocess.Popen(cmd_payload, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
Not sure why it couldnt find it if not invoked under a shell 不知道如果没有在shell下调用为什么无法找到它
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