I try to build my docker file but it has failed.

I have folder structure in vscode like that:-

In my docker file have only few command:-

  COPY requirements.txt /tmp/pip-tmp/
  RUN pip install  -r /tmp/pip-tmp/requirements.txt \
  && rm -rf /tmp/pip-tmp

I got an error messege:-

PS C:\LearbayDatascience> docker build  -t proj:myapp /.devcontainer
unable to prepare context: path "/.devcontainer" not found
PS C:\LearbayDatascience> docker build  -t proj:myapp C:/LearbayDatascience/.devcontainer
[ ] Building 0.6s (7/8)
 => [internal] load build definition from Dockerfile                                                                                                              0.0s 
 => => transferring dockerfile: 32B                                                                                                                               0.0s 
 => [internal] load .dockerignore                                                                                                                                 0.0s 
 => => transferring context: 2B                                                                                                                                   0.0s 
 => [internal] load metadata for mcr.microsoft.com/vscode/devcontainers/python:0-3.10-bullseye                                                                    0.5s 
 => [internal] load build context                                                                                                                                 0.0s 
 => => transferring context: 2B                                                                                                                                   0.0s 
 => [1/4] FROM mcr.microsoft.com/vscode/devcontainers/python:0-3.10-bullseye@sha256:21a12816fcadaa16dabb4ba0e8c358361d02ea062b1b89db8786eb67173489d0              0.0s 
 => CACHED [2/4] RUN if [ "none" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install none 2>&1"; fi                        0.0s 
 => ERROR [3/4] COPY requirements.txt  /tmp/pip-tmp/requirements.txt                                                                                              0.0s 
------
 > [3/4] COPY requirements.txt  /tmp/pip-tmp/requirements.txt:
------
failed to compute cache key: "/requirements.txt" not found: not found

why requirments.txt is not found when I run the command from same folder structure. If I rebuild with vscode .devcontainer is loaded successfully.

Please help in this regards.

CodePudding user response：

Try putting the dockerfile in the same dir as the requirements.txt

Then in your Dockerfile

COPY ./requirements.txt /tmp/pip-tmp/requirements.txt
RUN pip install  -r /tmp/pip-tmp/requirements.txt \
&& rm -rf /tmp/pip-tmp

After this navigate to the folder where Dockerfile is located and pass as the build command

docker build -t proj:myapp .