Docker swarm cluster

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

machines=[
  {
    :hostname => "manager",
    :ip => "192.168.99.100",
    :box => "shekeriev/centos-8-minimal",
    :ram => 1024,
  },
  {
    :hostname => "worker-1",
    :ip => "192.168.99.101",
    :box => "shekeriev/centos-8-minimal",
    :ram => 1024,
  },
  {
    :hostname => "worker-2",
    :ip => "192.168.99.102",
    :box => "shekeriev/centos-8-minimal",
    :ram => 1024,
  }
]

$install_docker_script = <<SCRIPT
  echo "* Add Docker repository ..."
  dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

  echo "* Add the missing dependency ..."
  dnf install -y https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.13-3.1.el7.x86_64.rpm

  echo "* Install Docker ..."
  dnf install -y docker-ce docker-ce-cli

  echo "* Enable and start Docker ..."
  systemctl enable docker
  systemctl start docker

  echo "*Disable Firewall..."
  systemctl stop firewalld

  echo "* Add vagrant user to docker group ..."
  usermod -aG docker vagrant
SCRIPT

$manager_script = <<SCRIPT
if [ "$#" -eq 1 ]; then
   echo "Docker swarm init..."
   echo Arguments: $*
   docker swarm init --advertise-addr $1
   docker swarm join-token -q worker > /vagrant/swarm-token-worker
else
   echo "Illegal number of parameters"
fi
SCRIPT

$node_script = <<SCRIPT
echo "Arguments: $*"
if [ "$#" -eq 2 ]; then
   echo "Docker swarm join..."
   cat /vagrant/swarm-token-worker
   docker swarm join --token `cat /vagrant/swarm-token-worker` --advertise-addr $1 $2:2377
else
   echo "Illegal number of parameters"
fi
SCRIPT

Vagrant.configure("2") do |config|
  machines.each do |machine|
    config.vm.define machine[:hostname] do |node|
      node.vm.box = machine[:box]
      node.vm.hostname = machine[:hostname]
      node.vm.network "private_network", ip: machine[:ip]
      node.vm.network "forwarded_port", guest: 8080, host: 8080, auto_correct: true
      node.vm.provision "shell", inline: $install_docker_script
      node.vm.synced_folder "web", "/home/vagrant/web"
      node.vm.provision "shell", inline: "docker image build ./web/php -t my-web"
      node.vm.provision "shell", inline: "docker image build ./web/mysql -t my-db"
      node.vm.provision "shell", inline: "systemctl restart docker"

      if machine[:hostname] == "manager"
        MANAGER_IP = machine[:ip]
        node.vm.provision "shell", inline: $manager_script, :args => ["#{machine[:ip]}"], privileged: true
        node.vm.provision "file", source: "./docker-compose.yml", destination: "/home/vagrant/docker-compose.yml"
      else
        node.vm.provision "shell", inline: $node_script,:args => ["#{machine[:ip]}", "#{MANAGER_IP}"], privileged: true
      end
      node.vm.provider "virtualbox" do |vb|
        vb.customize ["modifyvm", :id, "--memory", machine[:ram]]
      end
    end
  end
end