Vagrantfile for Docker Swarm

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure('2') do |config|
  config.vm.box = 'centos7_1706.02_with_guest_additions'

  config.vm.provider :virtualbox do |vb|
    vb.memory = '512'
    vb.cpus = 1
  end

  install_docker_provision = <<-SHELL
    test -f /etc/yum.repos.d/docker-ce.repo || ( \
      yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo; \
      yum-config-manager --enable docker-ce-edge; \
      yum makecache fast \
    )
    rpm -aq | grep -q docker || ( \
      yum install -y docker-ce; \
      perl -i -pe 's;^ExecStart=/usr/bin/dockerd$;ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock;' /lib/systemd/system/docker.service; \
      systemctl enable docker; \
      systemctl start docker \
    )
    groups vagrant | grep -q docker || ( \
      gpasswd -a vagrant docker
    )
    test -f /etc/sysconfig/docker || \
      echo "OPTIONS=--selinux-enabled -H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375" > /etc/sysconfig/docker
  SHELL

  init_swarm_provision = <<-SHELL
    docker swarm init --advertise-addr 10.10.10.10
    docker swarm join-token --quiet worker > /vagrant/worker_token
  SHELL

  enter_swarm_provision = <<-SHELL
    docker swarm join --token $(cat /vagrant/worker_token) 10.10.10.10
  SHELL

  config.vm.define :manager, primary: true do |m|
    m.vm.network :private_network, ip: "10.10.10.10"
    m.vm.hostname = 'manager'
    m.vm.provision :shell, inline: install_docker_provision
    m.vm.provision :shell, inline: init_swarm_provision
  end

  (1..2).each do |i|
    config.vm.define "worker#{i}" do |m|
      m.vm.network :private_network, ip: "10.10.10.2#{i}"
      m.vm.hostname = "worker#{i}"
      m.vm.provision :shell, inline: install_docker_provision
      m.vm.provision :shell, inline: enter_swarm_provision
    end
  end
end