Remove dependency on docker-compose

[rgraber]

A/C:

• docker-compose is no longer being installed in devstack.
• Replace use of the docker-compose commands that are the old way of doing things.
• Document the minimum version required for the Docker engine that handles docker compose.
• Announcement that we have made this change.

Devstack lists docker-compose as a dependency in its base.in. Docker-compose is no longer being maintained, having been replaced by docker compose in the latest Docker versions. The docker-compose dependency pins pyyaml to <6.0, which breaks make requirements on Silicon machines.
We should remove the dependency on docker-compose and replace all usages of it with docker compose.
Note that the latest version of Docker devstack automatically patches docker-compose to docker compose so docker-compose will still work on most machines even if we remove the dependency. It will break on Linux, however.

[timmc-edx]

I just tried this out on Ubuntu 22.04 LTS and it looks good. Notes for Linux users:

• I more or less followed the instructions at https://docs.docker.com/engine/install/ubuntu/ to install the newer docker, v24.
• When I uninstalled the Ubuntu-provided docker.io and docker-compose packages I used apt purge, but that removes all of the volumes. I had backups, so this was fine, but most people will want to use apt remove instead. These were v20 or so, for reference.
• For anyone who likes using Ansible to manage their development machine:

  # Docker apt keyring fetched 2023-08-29:
  #
  # curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o ../files/docker-apt-ubuntu.gpg
  - name: "Docker apt repo key"
    copy:
      src: "{{ role_path }}/files/docker-apt-ubuntu.gpg"
      dest: "/etc/apt/keyrings/docker.gpg"
    register: devstack__apt_sources_docker_key
  
  - name: "Docker apt repo"
    copy:
      content: |
        deb [arch="amd64" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu jammy stable
      dest: /etc/apt/sources.list.d/docker.list
    register: devstack__apt_sources_docker_list
  
  - name: "Update apt if docker sources changed"
    apt:
      update_cache: yes
    when: >-
      devstack__apt_sources_docker_key.changed
      or devstack__apt_sources_docker_list.changed
  
  - name: "Install packages"
    apt:
      name:
      - docker-ce
      - docker-compose-plugin
  

• I changed my Makefile to use the compose subcommand, and everything seems to still work.
• I also added the following shim so that I can use the newer docker in the meantime without any devstack changes:

  $ cat ~/bin/docker-compose
  #!/bin/bash
  
  docker compose "$@"
  

[rgraber]

Completed with #1172