VagrantLibvirtPOCBuilder.rb, Le Guide Complet pour des Vagrantfiles Optimisés

1/Users/btall/Labs
2├── VagrantLibvirtPOCBuilder.rb
3└── 42-consul
4    └── Vagrantfile

 1require_relative '../VagrantLibvirtPOCBuilder.rb'
 2
 3class ConsulCluster < VagrantLibvirtPOCBuilder
 4  def configure(config, node, i)
 5    # Mettons ici tout ce qui est spécifique à notre machine virtuelle
 6  end
 7end
 8
 9ConsulCluster.new(
10  num_instances: 3,
11  cpus: 2,
12  memory: 4096,
13  system_update: false,
14  box: 'generic/ubuntu2204',
15  disks_count: 0,
16  disks_size: '5G',
17  username: "btall"
18).generate

  1class VagrantLibvirtPOCBuilder
  2  def initialize(num_instances:, cpus: 2, memory: 4096, system_update: false, box: 'generic/ubuntu2204', disks_count: 0, disks_size: '5G', username: "btall")
  3    caller_path = caller_locations.find { |loc| loc.path =~ /Vagrantfile$/ }&.path
  4    if caller_path
  5      @project_directory_name = File.basename(File.dirname(caller_path))
  6                                         .gsub(/[^0-9A-Za-z]/, '-')
  7                                         .downcase
  8    else
  9      $stderr.puts "Erreur : Impossible de trouver le Vagrantfile parent."
 10      exit 1
 11    end
 12
 13    @match_data = @project_directory_name.match(/(\d+)-(.+)/)
 14    if @match_data.nil? || @match_data[1].to_i < 1 || @match_data[1].to_i > 254
 15      $stderr.puts "Erreur : Le nom du répertoire doit être au format NNN-mydirectory!"
 16      $stderr.puts "         NNN doit être un nombre compris entre 1 et 254."
 17      exit 1
 18    end
 19
 20    @_debian_like = /(debian|ubuntu)/i
 21    @_redhat_like = /(centos|alma|rhel|rocky|fedora)/i
 22
 23    @cpus = cpus
 24    @memory = memory
 25    @username = username
 26    @system_update = system_update
 27    @num_instances = num_instances
 28    @disks_count = disks_count
 29    @disks_size = disks_size
 30    @box = box
 31    @disk_uuid = Time.now.utc.to_i
 32    setup_network_vars
 33  end
 34
 35  def setup_network_vars
 36    @network_name = @match_data[2]
 37    @network_domain = "#{@network_name}.lab"
 38    @network_subnet = "172.2.#{@match_data[1].to_i}"
 39    @private_network_subnet = "10.2.#{@match_data[1].to_i}"
 40    @private_network_subnet6 = "fd3c:b398:0698:0756"
 41    @network_cidr = "#{@network_subnet}.0/24"
 42  end
 43
 44  def provider_config(config)
 45    config.vm.provider "libvirt" do | lv |
 46      lv.connect_via_ssh = true
 47      lv.cpus = @cpus
 48      lv.keymap = "fr"
 49      lv.memory = @memory
 50      lv.graphics_type = "none"
 51      lv.default_prefix = "#{@username}-"
 52      lv.storage_pool_name = @username
 53      lv.uri = ENV['VAGRANT_LIBVIRT_URI']
 54      lv.management_network_address = @network_cidr
 55      lv.management_network_name = "#{@network_name}br2"
 56      lv.management_network_domain = @network_domain
 57    end
 58  end
 59
 60  def box_config(config)
 61    config.vm.box = @box
 62    config.vm.box_check_update = true
 63  end
 64
 65  def system_update(node)
 66    if @box =~ @_debian_like
 67      node.vm.provision "shell", inline: <<-SHELL
 68        sudo apt clean
 69        sudo apt update
 70        sudo apt upgrade -y
 71        sudo systemctl daemon-reload
 72      SHELL
 73    elsif @box =~ @_redhat_like
 74      node.vm.provision "shell", inline: <<-SHELL
 75        sudo yum update
 76        sudo yum upgrade -y
 77        sudo systemctl daemon-reload
 78      SHELL
 79    end
 80  end
 81
 82  def handle_disks(node, i)
 83    driverletters = ('a'..'z').to_a
 84    node.vm.provider "libvirt" do | lv |
 85      (1..@disks_count).each do |d|
 86        lv.storage :file,
 87          :device => "vd#{driverletters[d]}",
 88          :path => "#{@network_name}-#{i}-#{d}-#{@disk_uuid}.disk",
 89          :size => @disks_size,
 90          :bus => "virtio",
 91          :type => "raw"
 92      end
 93    end
 94  end
 95
 96  def instance_config(config, i)
 97    config.vm.synced_folder ".", "/vagrant", disabled: false, type: "rsync", rsync__args: ['--verbose', '--archive', '--delete', '-z'], rsync__exclude: ['.git', '.venv', '.vscode', 'venv']
 98    config.vm.define vm_name = "%s-%01d" % [@network_name, i] do |node|
 99      node.vm.hostname = "%s-%01d" % [@network_name, i]
100      node.vm.network :private_network,
101        :ip => "#{@private_network_subnet}.#{i+100}",
102        :libvirt__guest_ipv6 => 'yes',
103        :libvirt__ipv6_address => "#{@private_network_subnet6}::#{i+100}",
104        :libvirt__ipv6_prefix => "64",
105        :libvirt__forward_mode => "none",
106        :libvirt__dhcp_enabled => false
107      handle_disks(node, i) if @disks_count.is_a?(Integer) && @disks_count > 0 && @disks_count < 26
108      system_update(node) if (@system_update.is_a?(TrueClass) || @system_update.is_a?(FalseClass)) && @system_update
109      configure(config, node, i)
110    end
111  end
112
113  def configure(config, node, i)
114    raise NotImplementedError, "La méthode configure doit être implémentée."
115  end
116
117  def generate
118    Vagrant.configure(2) do | config |
119      provider_config(config)
120      box_config(config)
121      (1..@num_instances).each do | i |
122        instance_config(config, i)
123      end
124    end
125  end
126end

1def initialize(num_instances:, cpus: 2, memory: 4096, system_update: false, box: 'generic/ubuntu2204', disks_count: 0, disks_size: '5G', username: "btall")
2  # ...
3end

1caller_path = caller_locations.find { |loc| loc.path =~ /Vagrantfile$/ }&.path
2if caller_path
3  @project_directory_name = File.basename(File.dirname(caller_path))
4                                     .gsub(/[^0-9A-Za-z]/, '-')
5                                     .downcase
6else
7  $stderr.puts "Erreur : Impossible de trouver le Vagrantfile parent."
8  exit 1
9end

1@match_data = @project_directory_name.match(/(\d+)-(.+)/)
2if @match_data.nil? || @match_data[1].to_i < 1 || @match_data[1].to_i > 254
3  $stderr.puts "Erreur : Le nom du répertoire doit être au format NNN-mydirectory!"
4  $stderr.puts "         NNN doit être un nombre compris entre 1 et 254."
5  exit 1
6end

1def setup_network_vars
2  # ...
3end

1def instance_config(config, i)
2  # ...
3end

1def handle_disks(node, i)
2  # ...
3end

1def provider_config(config)
2  # ...
3end