[Docker build] How to bring id_rsa to the inside container when building the image?

Bài toàn đặt ra là khi mà bạn run docker build thì yêu cần cần clone/pull 1 số repo private

Mình nghĩ ra 1 cách là thực hiện COPY ~/.ssh/id_rsa /root/.ssh/
như bị lỗi như bên dưới.

Step 32/38 : COPY ~/.ssh/id_rsa /root/.ssh/
COPY failed: file not found in build context or excluded by .dockerignore: stat ~/.ssh/id_rsa: file does not exist

Mình tìm thấy chả có quy định j trong .dockerignore

Giờ chúng ta sự dụng argument để làm việc này
https://stackoverflow.com/questions/18136389/using-ssh-keys-inside-docker-container

Build command

docker build -t example --build-arg ssh_prv_key="$(cat ~/.ssh/id_rsa)" --build-arg ssh_pub_key="$(cat ~/.ssh/id_rsa.pub)" --squash .

Dockerfile

FROM python:3.6-slim

ARG ssh_prv_key
ARG ssh_pub_key

RUN apt-get update && \
    apt-get install -y \
        git \
        openssh-server \
        libmysqlclient-dev

# Authorize SSH Host
RUN mkdir -p /root/.ssh && \
    chmod 0700 /root/.ssh && \
    ssh-keyscan github.com > /root/.ssh/known_hosts

# Add the keys and set permissions
RUN echo "$ssh_prv_key" > /root/.ssh/id_rsa && \
    echo "$ssh_pub_key" > /root/.ssh/id_rsa.pub && \
    chmod 600 /root/.ssh/id_rsa && \
    chmod 600 /root/.ssh/id_rsa.pub

# Avoid cache purge by adding requirements first
ADD ./requirements.txt /app/requirements.txt

WORKDIR /app/

RUN pip install -r requirements.txt

# Remove SSH keys
RUN rm -rf /root/.ssh/

# Add the rest of the files
ADD . .

CMD python manage.py runserver