Using multiple commands in a dockerfile

Question

My Dockerfile contents are as follows:

FROM amd64/ubuntu:xenial-20180726

ARG GETH_REPO="https://github.com/ethereum/go-ethereum"
ARG GETH_VERSION="v1.8.12"


CMD ["/bin/bash", "-c", "git clone ${GETH_REPO} && \ 
        cd go-ethereum && \
        git fetch origin ${GETH_VERSION} && \
        git checkout ${GETH_VERSION} && \
        make geth && \
        touch /var/log/geth_log"]

Basically, I want to download from the repository and build. However, when I run the created image I get the following error

$ docker run -it <imageid>
/bin/sh: 1: [/bin/bash,: not found

I have made sure that I can execute these operations by logging into the running container.

Am I missing something?

BMitch · Accepted Answer · 2018-07-31 10:51:41Z

1

Your json syntax is invalid, so docker is running it as a string with a shell, instead of execing it. There's nothing in your command that requires bash, so you can use the default /bin/sh with the string syntax:

FROM amd64/ubuntu:xenial-20180726

ARG GETH_REPO="https://github.com/ethereum/go-ethereum"
ARG GETH_VERSION="v1.8.12"

RUN git clone ${GETH_REPO} && \ 
        cd go-ethereum && \
        git fetch origin ${GETH_VERSION} && \
        git checkout ${GETH_VERSION} && \
        make geth && \
        touch /var/log/geth_log

Note that all of your steps are being run as the default start command for the container, rather than being performed at build time. You likely want to replace CMD with RUN.

edited Jul 31, 2018 at 10:51

answered Jul 31, 2018 at 9:49

BMitch

271k51 gold badges555 silver badges511 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

kosta Over a year ago

I tried that and I get the following error ` $ docker run -it 19bd08d6fa2d You must specify a repository to clone. usage: git clone [<options>] [--] <repo> [<dir>] ` Is there a need to provide the value of GETH_REPO during run? (default value provided)

BMitch Over a year ago

Build args only apply at build time. Do you want these commands to run at build time when you make the image, or at run time every time you create the container?

Collectives™ on Stack Overflow

Using multiple commands in a dockerfile

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related