Docker: Entrypoint with arguments and quotes

Question

I'm trying to create a Docker image with an entrypoint.sh and pass arguments when I run the Docker, the issue is when I want to use arguments with double quotes.

I search in many places, also I know is more a Bash question and how the arguments are expanded by the double quotes, but maybe someone has an idea how to avoid this.

My Dockerfile :

FROM centos:7

COPY    entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

My entrypoint.sh :

#!/bin/bash

command --display=true "$@"

Running the Docker:

docker run -ti docker-image:latest --driver="kernel-4.0 kernel-4.1"

Expected behaviour:

command --display=true --driver="kernel-4.0 kernel-4.1"

Actual behaviour:

command --display=true --driver=kernel-4.0 kernel-4.1

I tried escaping the double quotes but nothing.

Answer 1

Did you try to escape \\ before the value? It's working with me.

#!/bin/bash
echo "all params $@"
command --display=true "$@"

and

docker run -ti yourimage --driver=\"kernel-4.0 kernel-4.1\"

As mentioned by @David, this the expected behabout of bash script.

if you run entrypoint.sh outside of Docker, it will skip quotes.

./entrypoint.sh --driver="kernel-4.0 kernel-4.1"

#output

all params --driver=kernel-4.0 kernel-4.1
--display=true --driver=kernel-4.0 kernel-4.1

How to keep quotes in Bash arguments?