如何将docker构建命令参数传递给bash文件

Question

我将两个命令行参数传递给我的docker文件，像这样:

docker build . -t ros-container --build-arg UBUNTU_VERSION=bionic --build-arg ROS_VERSION=melodic 

我可以在我的docker文件中访问它们，尽管我不能在我的bash文件中获得它们。我已经尝试了entrypoint和术。但是，没有一个人帮助我。

我想访问两个参数，UBUNTU_VERSION &ROS_VERSION，从'script_init。bash的文件。查看项目结构

项目结构

- ros_tutorials-noetic-devel
-Dockerfile
-scripts
-script_init.bash

Dockerfile

FROM ros:melodic-perception-bionic
# install packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -q && 
apt-get upgrade -yq && 
apt-get install -yq wget curl git build-essential vim sudo lsb-release locales bash- 
completion
# Adjust working directory
RUN locale-gen en_US.UTF-8
RUN useradd -m -d /home/ubuntu ubuntu -p `perl -e 'print crypt("ubuntu", 
"salt"),"n"'` && 
echo "ubuntu ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
# declare ros version arg
ARG ROS_VERSION
#declare ubuntu version arg
ARG UBUNTU_VERSION
# setup environment
USER ubuntu
WORKDIR /home/ubuntu
ENV UBUNTU_V=$UBUNTU_VERSION 
ROS_V=$ROS_VERSION
ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
CMD COPY ./scripts/script_init.bash /
ENTRYPOINT ["/scripts/script_init.bash /"] 

script_init.bash

#!/bin/bash
set -e
export UBUNTU_CODENAME=$UBUNTU_V
export REPO_DIR=$(dirname "$SCRIPT_DIR")
export CATKIN_DIR="$HOME/catkin_ws"
export ROS_DISTRO=$ROS_V

Answer 1

您需要将脚本文件复制到您的docker映像中并正确执行它。你应该能够通过使用这个Dockerfile让它工作，注意下面的行:

FROM ros:melodic-perception-bionic
# install packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -q && 
apt-get upgrade -yq && 
apt-get install -yq 
bash-completion 
build-essential 
curl 
git 
locales 
lsb-release 
sudo 
vim 
wget
# Adjust working directory
RUN locale-gen en_US.UTF-8
RUN useradd -m -d /home/ubuntu ubuntu -p `perl -e 'print crypt("ubuntu", "salt"),"n"'` && 
echo "ubuntu ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
# declare ros version arg
ARG ROS_VERSION
#declare ubuntu version arg
ARG UBUNTU_VERSION
# setup environment
USER ubuntu
WORKDIR /home/ubuntu
ENV UBUNTU_V=$UBUNTU_VERSION 
ROS_V=$ROS_VERSION
ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
# Copy your scripts directory into the docker image
COPY --chown=ubuntu:ubuntu scripts scripts
# Make sure you have execute permissions on the script
RUN chmod +x "./scripts/script_init.bash"
# Set your entrypoint to execute the script
ENTRYPOINT ["./scripts/script_init.bash"]

值得注意的是，你可以在构建过程中导出Dockerfile中的所有环境变量，而无需在运行时执行脚本，例如在你的Dockerfile中:

# Export environment variables in Dockerfile
ENV UBUNTU_CODENAME=$UBUNTU_VERSION
ENV REPO_DIR=/home/ubuntu/scripts
ENV CATKIN_DIR=/home/ubuntu/catkin_ws
ENV ROS_DISTRO=$ROS_VERSION

Answer 2

我终于找到了一个妙招!添加脚本文件夹后，可以使用bash命令运行它。通过这种方式，您可以将任何参数传递给脚本文件夹中的任何bash文件。

# setup base image
FROM ros:melodic-perception-bionic
# install packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -q && 
apt-get upgrade -yq && 
apt-get install -yq wget curl git build-essential vim sudo lsb-release locales bash-completion
# Adjust working directory
RUN locale-gen en_US.UTF-8
RUN useradd -m -d /home/ubuntu ubuntu -p `perl -e 'print crypt("ubuntu", "salt"),"n"'` && 
echo "ubuntu ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
# declare ros version arg
ARG ROS_VERSION
#declare ubuntu version arg
ARG UBUNTU_VERSION
# setup environment
USER ubuntu
WORKDIR /home/ubuntu
ENV UBUNTU_V=$UBUNTU_VERSION 
ROS_V=$ROS_VERSION
ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8

# call script files
ADD /scripts /scripts
RUN bash /scripts/script_init.bash