VagrantLibvirtPOCBuilder.rb, Le Guide Complet pour des Vagrantfiles Optimisés

/Users/btall/Labs
├── VagrantLibvirtPOCBuilder.rb
└── 42-consul
    └── Vagrantfile

require_relative '../VagrantLibvirtPOCBuilder.rb'

class ConsulCluster < VagrantLibvirtPOCBuilder
  def configure(config, node, i)
    # Mettons ici tout ce qui est spécifique à notre machine virtuelle
  end
end

ConsulCluster.new(
  num_instances: 3,
  cpus: 2,
  memory: 4096,
  system_update: false,
  box: 'generic/ubuntu2204',
  disks_count: 0,
  disks_size: '5G',
  username: "btall"
).generate

class VagrantLibvirtPOCBuilder
  def initialize(num_instances:, cpus: 2, memory: 4096, system_update: false, box: 'generic/ubuntu2204', disks_count: 0, disks_size: '5G', username: "btall")
    caller_path = caller_locations.find { |loc| loc.path =~ /Vagrantfile$/ }&.path
    if caller_path
      @project_directory_name = File.basename(File.dirname(caller_path))
                                         .gsub(/[^0-9A-Za-z]/, '-')
                                         .downcase
    else
      $stderr.puts "Erreur : Impossible de trouver le Vagrantfile parent."
      exit 1
    end

    @match_data = @project_directory_name.match(/(\d+)-(.+)/)
    if @match_data.nil? || @match_data[1].to_i < 1 || @match_data[1].to_i > 254
      $stderr.puts "Erreur : Le nom du répertoire doit être au format NNN-mydirectory!"
      $stderr.puts "         NNN doit être un nombre compris entre 1 et 254."
      exit 1
    end

    @_debian_like = /(debian|ubuntu)/i
    @_redhat_like = /(centos|alma|rhel|rocky|fedora)/i

    @cpus = cpus
    @memory = memory
    @username = username
    @system_update = system_update
    @num_instances = num_instances
    @disks_count = disks_count
    @disks_size = disks_size
    @box = box
    @disk_uuid = Time.now.utc.to_i
    setup_network_vars
  end

  def setup_network_vars
    @network_name = @match_data[2]
    @network_domain = "#{@network_name}.lab"
    @network_subnet = "172.2.#{@match_data[1].to_i}"
    @private_network_subnet = "10.2.#{@match_data[1].to_i}"
    @private_network_subnet6 = "fd3c:b398:0698:0756"
    @network_cidr = "#{@network_subnet}.0/24"
  end

  def provider_config(config)
    config.vm.provider "libvirt" do | lv |
      lv.connect_via_ssh = true
      lv.cpus = @cpus
      lv.keymap = "fr"
      lv.memory = @memory
      lv.graphics_type = "none"
      lv.default_prefix = "#{@username}-"
      lv.storage_pool_name = @username
      lv.uri = ENV['VAGRANT_LIBVIRT_URI']
      lv.management_network_address = @network_cidr
      lv.management_network_name = "#{@network_name}br2"
      lv.management_network_domain = @network_domain
    end
  end

  def box_config(config)
    config.vm.box = @box
    config.vm.box_check_update = true
  end

  def system_update(node)
    if @box =~ @_debian_like
      node.vm.provision "shell", inline: <<-SHELL
        sudo apt clean
        sudo apt update
        sudo apt upgrade -y
        sudo systemctl daemon-reload
      SHELL
    elsif @box =~ @_redhat_like
      node.vm.provision "shell", inline: <<-SHELL
        sudo yum update
        sudo yum upgrade -y
        sudo systemctl daemon-reload
      SHELL
    end
  end

  def handle_disks(node, i)
    driverletters = ('a'..'z').to_a
    node.vm.provider "libvirt" do | lv |
      (1..@disks_count).each do |d|
        lv.storage :file,
          :device => "vd#{driverletters[d]}",
          :path => "#{@network_name}-#{i}-#{d}-#{@disk_uuid}.disk",
          :size => @disks_size,
          :bus => "virtio",
          :type => "raw"
      end
    end
  end

  def instance_config(config, i)
    config.vm.synced_folder ".", "/vagrant", disabled: false, type: "rsync", rsync__args: ['--verbose', '--archive', '--delete', '-z'], rsync__exclude: ['.git', '.venv', '.vscode', 'venv']
    config.vm.define vm_name = "%s-%01d" % [@network_name, i] do |node|
      node.vm.hostname = "%s-%01d" % [@network_name, i]
      node.vm.network :private_network,
        :ip => "#{@private_network_subnet}.#{i+100}",
        :libvirt__guest_ipv6 => 'yes',
        :libvirt__ipv6_address => "#{@private_network_subnet6}::#{i+100}",
        :libvirt__ipv6_prefix => "64",
        :libvirt__forward_mode => "none",
        :libvirt__dhcp_enabled => false
      handle_disks(node, i) if @disks_count.is_a?(Integer) && @disks_count > 0 && @disks_count < 26
      system_update(node) if (@system_update.is_a?(TrueClass) || @system_update.is_a?(FalseClass)) && @system_update
      configure(config, node, i)
    end
  end

  def configure(config, node, i)
    raise NotImplementedError, "La méthode configure doit être implémentée."
  end

  def generate
    Vagrant.configure(2) do | config |
      provider_config(config)
      box_config(config)
      (1..@num_instances).each do | i |
        instance_config(config, i)
      end
    end
  end
end

def initialize(num_instances:, cpus: 2, memory: 4096, system_update: false, box: 'generic/ubuntu2204', disks_count: 0, disks_size: '5G', username: "btall")
  # ...
end

caller_path = caller_locations.find { |loc| loc.path =~ /Vagrantfile$/ }&.path
if caller_path
  @project_directory_name = File.basename(File.dirname(caller_path))
                                     .gsub(/[^0-9A-Za-z]/, '-')
                                     .downcase
else
  $stderr.puts "Erreur : Impossible de trouver le Vagrantfile parent."
  exit 1
end

@match_data = @project_directory_name.match(/(\d+)-(.+)/)
if @match_data.nil? || @match_data[1].to_i < 1 || @match_data[1].to_i > 254
  $stderr.puts "Erreur : Le nom du répertoire doit être au format NNN-mydirectory!"
  $stderr.puts "         NNN doit être un nombre compris entre 1 et 254."
  exit 1
end

def setup_network_vars
  # ...
end

def instance_config(config, i)
  # ...
end

def handle_disks(node, i)
  # ...
end

def provider_config(config)
  # ...
end