Is there a way to hardcode user inputs in a Dockerfile or run docker build in interactive mode?

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I am using a Dockerfile to install a tool. I am running docker build -f Dockerfile -t ubuntu:mytool . command to initiate the build. The line RUN ./toolPackageInstaller expects two user inputs (1) install path selection and (2) an integer for timezone info halfway through the installation. How do I hardcode this info in a dockerfile or run docker build in interactive mode so the user can input these values during the install process?

FROM ubuntu:bionic

WORKDIR /tmp

RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
    build-essential \
    sudo \
    git \
    make
COPY ToolPackage.tar.xz /tmp
RUN tar xvfJp /tmp/ToolPackage.tar.xz

WORKDIR /tmp/ToolPackage
RUN chmod +x toolPackageInstaller
RUN ./toolPackageInstaller
dockerfile docker
1 Answers

Use build arguments for those desired arguments:

FROM ubuntu:bionic

ARG ARGUMENT_1=<HARDCODED_VALUE>
ARG ARGUMENT_2=<HARDCODED_VALUE>

WORKDIR /tmp

RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
    build-essential \
    sudo \
    git \
    make
COPY ToolPackage.tar.xz /tmp
RUN tar xvfJp /tmp/ToolPackage.tar.xz

WORKDIR /tmp/ToolPackage
RUN chmod +x toolPackageInstaller
RUN ./toolPackageInstaller $ARGUMENT_1 $ARGUMENT_2

And configure the script on toolPackageInstaller to use those values as input (referring to them with $1 and $2)

By default it will run with the hardcoded value, and also you can override it if you desire:

docker build --build-arg ARGUMENT_1=<NEW_VALUE> --build-arg ARGUMENT_2=<ANOTHER_NEW_VALUE> -t ubuntu:mytool .

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