Install docker compose on coreos

docker-compose-coreos.sh

sudo su -
mkdir -p /opt/bin
curl -L https://github.com/docker/compose/releases/download/1.5.1/docker-compose-`uname -s`-`uname -m` > /opt/bin/docker-compose
chmod +x /opt/bin/docker-compose

@artheus /usr/local/bin is read-only for CoreOS

modified artheus to use /opt/bin,
requires sudo

#!/bin/bash

mkdir -p /opt/bin
LATEST_URL=`curl -Ls -o /dev/null -w %{url_effective} https://github.com/docker/compose/releases/latest`
COMPOSE_VERSION=${LATEST_URL##*/}
DOWNLOAD_URL=https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m`

curl -L ${DOWNLOAD_URL} -o /opt/bin/docker-compose
chmod +x /opt/bin/docker-compose

The Container Linux Config (cl.conf) based on daveneeley's conf which worked with:

• Ignition v2.2.0, Vagrant 2.2.4, VirtualBox v6.0.4r128413, HOST: macOS Mojave(OSX 10.14.4), GUEST: Container Linux by CoreOS stable (2023.5.0)

storage:
  files:
    - path: /opt/bin/docker-compose
      filesystem: root
      mode: 0755
      contents:
        remote:
          url: https://github.com/docker/compose/releases/download/1.21.2/docker-compose-Linux-x86_64
          verification:
            hash:
              function: sha512
              sum: 5A9CCBE01CBF585732907F38FBACC21AECD2EDC9351BD1EE91DF750740A7FFF9D73BD489D708087D9D8892AD8F448A78A8EE401D240A51D0202ED0C08E30BF88

The complete conf (cl.conf)

Transpile it to config.ign with ct before use.

etcd:
  name:                        "{HOSTNAME}"
  listen_peer_urls:            "http://{PRIVATE_IPV4}:2380"
  listen_client_urls:          "http://0.0.0.0:2379"
  initial_advertise_peer_urls: "http://{PRIVATE_IPV4}:2380"
  advertise_client_urls:       "http://{PRIVATE_IPV4}:2379"
  discovery:                   "https://discovery.etcd.io/<REPLACE HERE TO YOUR TOKEN>"

storage:
  files:
    - path: /opt/bin/docker-compose
      filesystem: root
      mode: 0755
      contents:
        remote:
          url: https://github.com/docker/compose/releases/download/1.21.2/docker-compose-Linux-x86_64
          verification:
            hash:
              function: sha512
              sum: 5A9CCBE01CBF585732907F38FBACC21AECD2EDC9351BD1EE91DF750740A7FFF9D73BD489D708087D9D8892AD8F448A78A8EE401D240A51D0202ED0C08E30BF88

systemd:
  units:
    - name: docker-tcp.socket
      enable: true
      contents: |
        [Unit]
        Description=Docker Socket for the API

        [Socket]
        ListenStream=2375
        Service=docker.service
        BindIPv6Only=both

        [Install]
        WantedBy=sockets.target
    - name: flanneld.service
      dropins:
        - name: 50-network-config.conf
          contents: |
            [Service]
            ExecStartPre=/usr/bin/etcdctl set /flannel/network/config '{ "Network": "10.1.0.0/16" }'

flannel:
  etcd_prefix: "/flannel/network"