ci/cd "docker" command not found in image built with docker installed-CodePudding

I have this .gitlab-ci.yml file wanting to automate the docker image building, basically I'm using the one from the template:

docker-build:
  image: my_image_build_with_docker_inside_inprivate_repo
  stage: build
  services:
    - docker:dind
  before_script:
    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
  # Default branch leaves tag empty (= latest tag)
  # All other branches are tagged with the escaped branch name (commit ref slug)
  script:
    - |
      if [[ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]]; then
        tag=""
        echo "Running on default branch '$CI_DEFAULT_BRANCH': tag = 'latest'"
      else
        tag=":$CI_COMMIT_REF_SLUG"
        echo "Running on branch '$CI_COMMIT_BRANCH': tag = $tag"
      fi
    - docker build --pull -t "$CI_REGISTRY_IMAGE${tag}" .
    - docker push "$CI_REGISTRY_IMAGE${tag}"
  # Run this job in a branch where a Dockerfile exists
  rules:
    - if: $CI_COMMIT_BRANCH
      exists:
        - Dockerfile

#$CI_REGISTRY_IMAGE = my_image_build_with_docker_inside_inprivate_repo

When I run it get this error:

$ docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGIST
/bin/bash: line 132: docker: command not found
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

This is the dockerfile used to build the custom image:

FROM debian:stable

RUN apt-get update -y \
 && apt-get install -y python3 \
 && apt-get install -y python3-venv \
 && apt-get install -y python3-pip \
 && apt-get install -y git \
 && apt-get install -y docker-compose 

# Custom cache invalidation
ARG CACHEBUST=1

# Clone netdd repository  
RUN git clone https:.../netdd_demo.git

# Replace 'activate' cmd by setting the environment variables
RUN mkdir /netdd_demo/venv
ENV VIRTUAL_ENV=/netdd_demo/venv
RUN python3 -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"

# Persistent volume mount point
VOLUME /netdd_demo/files

# Install dependencies:
RUN python3 -m pip install --upgrade pip \ 
    && pip3 install -r /netdd_demo/requirements.txt

# Run the application:
WORKDIR /netdd_demo
ENTRYPOINT ["python3", "netdd_main.py"]

What do I need to modify in the files above to make this work?

With : RUN apt-get install -y docker-compose , I get everything needed for docker to run in the debian image. But I still get the error of docker command not found as above. What are the other steps needed to run docker daemon from your custom image?

CodePudding user response：

In the stage docker-build, the job is based on an image that does not have the docker installed.

As a result when you try to communicate with the docker:dind service, the job can't not find the docker command

Change

docker-build:
  image: cr.s.com/ccp/vm:v7
  stage: build

docker-build:
  image: docker:latest
  stage: build

CodePudding user response：

You can try installing docker in the Dockerfile to build your custom image.

You can follow the steps defined in the official docs https://docs.docker.com/engine/install/debian/ which would look like something like this in your Dockerfile

RUN apt-get install -y \
    ca-certificates \
    curl \
    gnupg \
    lsb-release
RUN curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
RUN echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
RUN apt-get update -y
RUN apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin