I have a base image I cannot modify in this case. The entrypoint of the image is python3, but I have a docker run in which I would like to make /bin/bash the entrypoint. The point is, I want to put the -c and -l flags in the /bin/bash command.
To clarify, I would like the equivalent of
ENTRYPOINT ["/bin/bash", "-l", "-c"]
but when I run the docker run --entrypoint /bin/bash <image>
command
CodePudding user response:
If you can't to modify the image, you can achieve that by setting /bin/bash
as the entrypoint and then passing the rest of the arguments as arguments to the container.
E.G:
docker run --entrypoint /bin/bash ubuntu -c ls
Runs ls
inside your container. docker run
does not accept sentences surrounded with quotes as it would try to find the executable named "/bin/bash -c -l"
and would fail. So you're left with that or setting up a custom entrypoint script.
CodePudding user response:
If you're only looking to do this once, then you can override the entrypoint with the --entrypoint
flag when using docker run
.
$ docker run --entrypoint /bin/bash <image> -l -c
Everything that comes after the image name is passed to the new entrypoint as arguments.
Alternatively, if you expect you will be doing this again, I would instead recommend creating a new image altogether with docker commit
:
$ docker run -d <image>
89373736
$ docker commit --change='ENTRYPOINT ["/bin/bash", "-l", "-c"]' 89373736 mynewimage
You will end up with a new image (mynewimage
) that has the desired entrypoint.
CodePudding user response:
flag --entrypoint gets a string as input so the following command should work!
docker run --entrypoint "/bin/bash -l -c" <image>