Class: VagrantPlugins::ProviderLibvirt::Action::SetBootOrder

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant-libvirt/action/set_boot_order.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, env) ⇒ SetBootOrder

Returns a new instance of SetBootOrder.



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# File 'lib/vagrant-libvirt/action/set_boot_order.rb', line 8

def initialize(app, env)
  @app    = app
  @logger = Log4r::Logger.new("vagrant_libvirt::action::set_boot_order")
  config = env[:machine].provider_config
  @boot_order = config.boot_order
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/vagrant-libvirt/action/set_boot_order.rb', line 15

def call(env)
 # Get domain first
  begin
    domain = env[:machine].provider.driver.connection.client.lookup_domain_by_uuid(
      env[:machine].id.to_s)
  rescue => e
    raise Errors::NoDomainError,
      :error_message => e.message
  end

  # Only execute specific boot ordering if this is defined in the Vagrant file
  if @boot_order.count >= 1
  
    # If a domain is initially defined with no box or disk or with an explicit boot order, libvirt adds <boot dev="foo">
    # This conflicts with an explicit boot_order configuration, so we need to remove it from the domain xml and feed it back.
    # Also see https://bugzilla.redhat.com/show_bug.cgi?id=1248514 as to why we have to do this after all devices have been defined.
    xml = Nokogiri::XML(domain.xml_desc)
    xml.search("/domain/os/boot").each do |node|
      node.remove
    end

    # Parse the XML and find each defined drive and network interfacee
    hd = xml.search("/domain/devices/disk[@device='disk']")
    cdrom = xml.search("/domain/devices/disk[@device='cdrom']")
    network = xml.search("/domain/devices/interface[@type='network' or @type='udp']")

    # Generate an array per device group and a flattened array from all of those
    devices = {"hd" => hd, "cdrom" => cdrom, "network" => network}
    final_boot_order = @boot_order.flat_map {|category| devices[category] }

    # Loop over the entire defined boot order array and create boot order entries in the domain XML
    final_boot_order.each_with_index do |node, index|
      boot = "<boot order='#{index+1}'/>"
      node.add_child(boot)
      if node.name == 'disk'
        @logger.debug "Setting #{node['device']} to boot index #{index+1}"
      elsif node.name == 'interface'
        @logger.debug "Setting #{node.name} to boot index #{index+1}"
      end
    end

    # Finally redefine the domain XML through libvirt to apply the boot ordering
    env[:machine].provider.driver.connection.client.define_domain_xml(xml.to_s)
  end

  @app.call(env)

end