在docker-compose文件映像中使用变量

Question

I would like to pull and push my images to different repositories depending on the environment I am deploying them to.

My .env file obviously only works in a single environment and currently i have to use multiple docker-compose files to get around this.

Simply I would like to do something like this:

version: '2.1'
services:
  my_service:
    build:
      dockerfile: Dockerfile.somedockerfile
    image: ${docker_repo_host}:${docker_repo_port}/myimage:latest

Where I could pass in docker_repo_host and docker_repo_port dynamically when I am building. I am unsure if there is a way to do this neatly but any suggestion would be appreciated.

Answer 1

Export the two variables

export docker_repo_host=your_host 
export docker_repo_port=your_port

Now run the docker-compose command