KubernetesMultiNodeCluster_V2_Vagrantfile

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

servers = [
  {
      :name => "k8s-master-node",
      :type => "master",
      :box => "ubuntu/xenial64",
      :box_version => "20180831.0.0",
      :eth1 => "192.168.205.10",
      :port_forward => "8001",
      :mem => "2048",
      :cpu => "2"
  },
  {
      :name => "k8s-worker-node-1",
      :type => "node",
      :box => "ubuntu/xenial64",
      :box_version => "20180831.0.0",
      :eth1 => "192.168.205.11",
      :port_forward => "",
      :mem => "2048",
      :cpu => "2"
  },
  {
      :name => "k8s-worker-node-2",
      :type => "node",
      :box => "ubuntu/xenial64",
      :box_version => "20180831.0.0",
      :eth1 => "192.168.205.12",
      :port_forward => "",
      :mem => "2048",
      :cpu => "2"
  }
]

dockerScript = %{
  apt-get update && apt-get install -y apt-transport-https ca-certificates curl software-properties-common
  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
  add-apt-repository \
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) \
  stable"
  apt-get update && apt-get install -y docker-ce=$(apt-cache madison docker-ce | grep 18.09 | head -1 | awk '{print $3}')
  # run docker commands as vagrant user (sudo not required)
  usermod -aG docker vagrant
}

kubeadm_kubelet_kubectl_Script = %{
  apt-get update && apt-get install -y apt-transport-https curl
  curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
  cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
  deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
  apt-get update
  apt-get install -y kubelet kubeadm kubectl
  apt-mark hold kubelet kubeadm kubectl
}

$configureBox = <<-SCRIPT
  #{dockerScript}
  #{kubeadm_kubelet_kubectl_Script}
SCRIPT

$configureMaster = <<-SCRIPT
  echo "This is master"
  # ip of this box
  IP_ADDR=`ifconfig enp0s8 | grep Mask | awk '{print $2}'| cut -f2 -d:`
  # install k8s master
  HOST_NAME=$(hostname -s)
  kubeadm init --apiserver-advertise-address=$IP_ADDR --apiserver-cert-extra-sans=$IP_ADDR  --node-name $HOST_NAME
  #copying credentials to regular user - vagrant
  sudo --user=vagrant mkdir -p /home/vagrant/.kube
  cp -i /etc/kubernetes/admin.conf /home/vagrant/.kube/config
  chown $(id -u vagrant):$(id -g vagrant) /home/vagrant/.kube/config
  # install Calico pod network addon
  export KUBECONFIG=/home/vagrant/.kube/config
  # kubectl apply -f https://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/hosted/rbac-kdd.yaml
  # kubectl apply -f https://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml
  kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"

  kubeadm token create --print-join-command --ttl 0 >> /etc/kubeadm_join_cmd.sh
  chmod +x /etc/kubeadm_join_cmd.sh
  # required for setting up password less ssh between guest VMs
  sudo sed -i "/^[^#]*PasswordAuthentication[[:space:]]no/c\PasswordAuthentication yes" /etc/ssh/sshd_config
  sudo service sshd restart
SCRIPT

$configureNode = <<-SCRIPT
  echo "This is worker"
  apt-get install -y sshpass
  sshpass -p "vagrant" scp -o StrictHostKeyChecking=no vagrant@192.168.205.10:/etc/kubeadm_join_cmd.sh .
  sh ./kubeadm_join_cmd.sh
SCRIPT

Vagrant.configure("2") do |config|

  servers.each do |opts|
    config.vm.define opts[:name] do |node|

        node.vm.box = opts[:box]
        node.vm.box_version = opts[:box_version]
        node.vm.hostname = opts[:name]
        node.vm.network :private_network, ip: opts[:eth1]

        if opts[:port_forward] != ""
          node.vm.network "forwarded_port", guest: opts[:port_forward], host: opts[:port_forward]
        end
        
        node.vm.provider "virtualbox" do |v|

            v.name = opts[:name]
            v.customize ["modifyvm", :id, "--groups", "/Kenan Hancer"]
            v.customize ["modifyvm", :id, "--memory", opts[:mem]]
            v.customize ["modifyvm", :id, "--cpus", opts[:cpu]]

        end

        node.vm.provision "shell", inline: $configureBox

        if opts[:type] == "master"
            node.vm.provision "shell", inline: $configureMaster
        else
            node.vm.provision "shell", inline: $configureNode
        end

    end

  end

end