docker 在 docker 中组成 docker

Question

I am pretty new to docker and was following the documentation found here , trying deploy several containers inside dind using docker-compose 1.14.0 I get the following

docker run -v /home/dudarev/compose/:/compose/ --privileged docker:dind /compose/docker-compose
/usr/local/bin/dockerd-entrypoint.sh: exec: line 21: /compose/docker-compose: not found

Did I miss something?

Answer 1

There is official docker image on dockerhub for docker-compose, just use that.

Follow these steps:

• Create a directory on host mkdir /root/test
• Create docker-compose.yaml file with following contents:

version: '2'

services:
  web:
    build: .
    ports:
     - "5000:5000"
    volumes:
     - .:/code
  redis:
    image: redis

• Run docker run command to run docker-compose inside the container.

docker run -itd -v /var/run/docker.sock:/var/run/docker.sock -v /root/test/:/var/tmp/ docker/compose:1.24.1  -f /var/tmp/docker-compose.yaml up -d

NOTE: Here /var/tmp directory inside the container will contain docker-compose.yaml file so I have used -f option to specify complete path of the yaml file. Also docker.sock is mounted from host onto the container.

Hope this helps.

Answer 2

here is a full dockerfile to run docker-compose inside docker

FROM ubuntu:21.04
RUN apt-get update
RUN apt-get upgrade -y
RUN apt-get install -y python3
RUN apt-get install -y pip
RUN apt-get install -y curl
RUN curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
RUN chmod +x /usr/local/bin/docker-compose

Answer 3

Add docker-compose installation to your Dockerfile before executing docker run.

For example, if you have an Ubuntu docker, add to your Dockerfile :

RUN aptitude -y install docker-compose
RUN ln -s /usr/local/bin/docker-compose /compose/docker-compose

Because it looks like if your entry-point looks up docker compose in /compose folder, while docker-compose is installed in /usr/local/bin by default.

If you want a concrete docker-compose version (for example 1.20.0-rc2):

RUN curl -L https://github.com/docker/compose/releases/download/1.20.0-rc2/docker-compose-`uname -s`-`uname -m` -o /compose/docker-compose
RUN chmod +x /compose/docker-compose