CKA Pluralsight Vagrantfile

Vagrantfile

# Usage:
# vagrant up control1
# vagrant up worker1 worker2 worker3

# IMPORTANT: after running kubeadm init or join, you need to set the correct node ip
# sudo vim /var/lib/kubelet/kubeadm-flags.env
# --node-ip=10.28.28.<XX> at the end of the flags string
# sudo systemctl daemon-reload && sudo systemctl restart kubelet

# Assumes 10GB of RAM and 9 cores are available :)
# The control plane could be scaled back to 2c / 2GB and workers 1c / 2GB (total 5c / 8GB)

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

# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure("2") do |config|
  ssh_pub_key = File.readlines("#{Dir.home}/.ssh/id_rsa.pub").first.strip
  config.vm.provision "shell", inline: <<-SHELL
    apt-get update -y
    swapoff -a
    (crontab -l 2>/dev/null; echo "@reboot /sbin/swapoff -a") | crontab - || true
    echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
    echo #{ssh_pub_key} >> /root/.ssh/authorized_keys
  SHELL

  config.vm.define "control1" do |control1|
    control1.vm.box = "ubuntu/focal64"
    control1.vm.network :private_network, ip: "10.28.28.21"
    control1.vm.network :forwarded_port, guest: 22, host: 10122, id: "ssh"
    control1.vm.base_mac = nil
    control1.vm.provider "virtualbox" do |v|
      v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
      v.memory = 4096
      v.cpus = 3
    end
    #control1.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
    control1.vm.hostname = "control1"
  end

  config.vm.define "worker1" do |worker1|
    worker1.vm.box = "ubuntu/focal64"
    worker1.vm.network :private_network, ip: "10.28.28.31"
    worker1.vm.network :forwarded_port, guest: 22, host: 10131, id: "ssh"
    worker1.vm.base_mac = nil
    worker1.vm.provider "virtualbox" do |v|
      v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
      v.memory = 2048
      v.cpus = 2
    end
    #worker1.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
    worker1.vm.hostname = "worker1"
  end

  config.vm.define "worker2" do |worker2|
    worker2.vm.box = "ubuntu/focal64"
    worker2.vm.network :private_network, ip: "10.28.28.32"
    worker2.vm.network :forwarded_port, guest: 22, host: 10132, id: "ssh"
    worker2.vm.base_mac = nil
    worker2.vm.provider "virtualbox" do |v|
      v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
      v.memory = 2048
      v.cpus = 2
    end
    #worker1.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
    worker2.vm.hostname = "worker2"
  end

  config.vm.define "worker3" do |worker3|
    worker3.vm.box = "ubuntu/focal64"
    worker3.vm.network :private_network, ip: "10.28.28.33"
    worker3.vm.network :forwarded_port, guest: 22, host: 10133, id: "ssh"
    worker3.vm.base_mac = nil
    worker3.vm.provider "virtualbox" do |v|
      v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
      v.memory = 2048
      v.cpus = 2
    end
    #worker1.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
    worker3.vm.hostname = "worker3"
  end


  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://vagrantcloud.com/search.
  #config.vm.box = "base"

  # Disable automatic box update checking. If you disable this, then
  # boxes will only be checked for updates when the user runs
  # `vagrant box outdated`. This is not recommended.
  # config.vm.box_check_update = false

  # Create a forwarded port mapping which allows access to a specific port
  # within the machine from a port on the host machine. In the example below,
  # accessing "localhost:8080" will access port 80 on the guest machine.
  # NOTE: This will enable public access to the opened port
  # config.vm.network "forwarded_port", guest: 80, host: 8080

  # Create a forwarded port mapping which allows access to a specific port
  # within the machine from a port on the host machine and only allow access
  # via 127.0.0.1 to disable public access
  # config.vm.network "forwarded_port", guest: 80, host: 8080, host_ip: "127.0.0.1"

  # Create a private network, which allows host-only access to the machine
  # using a specific IP.
  # config.vm.network "private_network", ip: "192.168.33.10"

  # Create a public network, which generally matched to bridged network.
  # Bridged networks make the machine appear as another physical device on
  # your network.
  # config.vm.network "public_network"

  # Share an additional folder to the guest VM. The first argument is
  # the path on the host to the actual folder. The second argument is
  # the path on the guest to mount the folder. And the optional third
  # argument is a set of non-required options.
  # config.vm.synced_folder "../data", "/vagrant_data"

  # Provider-specific configuration so you can fine-tune various
  # backing providers for Vagrant. These expose provider-specific options.
  # Example for VirtualBox:
  #
  # config.vm.provider "virtualbox" do |vb|
  #   # Display the VirtualBox GUI when booting the machine
  #   vb.gui = true
  #
  #   # Customize the amount of memory on the VM:
  #   vb.memory = "1024"
  # end
  #
  # View the documentation for the provider you are using for more
  # information on available options.

  # Enable provisioning with a shell script. Additional provisioners such as
  # Ansible, Chef, Docker, Puppet and Salt are also available. Please see the
  # documentation for more information about their specific syntax and use.
  # config.vm.provision "shell", inline: <<-SHELL
  #   apt-get update
  #   apt-get install -y apache2
  # SHELL
end