How do i pass arguments to a python script in a container

Question

My python script needs two arguments to run --manual, --ckl and an optional --output. manual and ckl are just files used as to create an output file. I use argparse in the script.

When i try to run docker run test --manual test.xml --ckl rhel7.ckl

I get this error

docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "--manual": executable file not found in $PATH: unknown.

FROM python:3.10
WORKDIR /home/johnb
RUN pip install pandas 
ADD manual_into_ckl.py .
#command to run 
CMD [ "python", "manual_into_ckl.py"]

i'm new to this and im not sure how to configure the dockerfile correctly. I've tryed using the full path in the docker run command and that doesn't change anything

franklinsijo · Accepted Answer · 2022-11-03 18:01:35Z

2

If you want arguments to be passed to the container, then use ENTRYPOINT instruction in exec form instead of CMD in your Dockerfile.

FROM python:3.10
WORKDIR /home/johnb
RUN pip install pandas 
ADD manual_into_ckl.py .
#command to run 
ENTRYPOINT [ "python", "manual_into_ckl.py"]

Then run the container as

docker run test --manual test.xml --ckl rhel7.ckl

The additional arguments passed to docker run will be passed as args to the entrypoint specified in the dockerfile. The resulting command would look like

python manual_into_ckl.py --manual test.xml --ckl rhel7.ckl

answered Nov 3, 2022 at 18:01

franklinsijo

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3 Comments

DHEXX Over a year ago

when I try to run the image my script doesn't recognize the path/files i pass as valid even though the files are in the containers work directory. Is there anyway to supply them with a correct path? i use argparse in my python script

franklinsijo Over a year ago

Could you please open a new question with the command you are running and the errors that are thrown if any

DHEXX Over a year ago

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