Class: VagrantPlugins::ProviderLibvirt::Action::StartDomain

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

Overview

Just start the domain.

Instance Method Summary collapse

Constructor Details

#initialize(app, _env) ⇒ StartDomain

Returns a new instance of StartDomain.


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# File 'lib/vagrant-libvirt/action/start_domain.rb', line 9

def initialize(app, _env)
  @logger = Log4r::Logger.new('vagrant_libvirt::action::start_domain')
  @app = app
end

Instance Method Details

#call(env) ⇒ Object


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# File 'lib/vagrant-libvirt/action/start_domain.rb', line 14

def call(env)
  env[:ui].info(I18n.t('vagrant_libvirt.starting_domain'))

  domain = env[:machine].provider.driver.connection.servers.get(env[:machine].id.to_s)
  raise Errors::NoDomainError if domain.nil?
  config = env[:machine].provider_config

  begin
    # update domain settings on change.

    libvirt_domain = env[:machine].provider.driver.connection.client.lookup_domain_by_uuid(env[:machine].id)

    # Libvirt API doesn't support modifying memory on NUMA enabled CPUs
    # http://libvirt.org/git/?p=libvirt.git;a=commit;h=d174394105cf00ed266bf729ddf461c21637c736
    if config.numa_nodes == nil
      if config.memory.to_i * 1024 != libvirt_domain.max_memory
        libvirt_domain.max_memory = config.memory.to_i * 1024
        libvirt_domain.memory = libvirt_domain.max_memory
      end
    end
    begin
      # XML definition manipulation
      descr = libvirt_domain.xml_desc(1)
      xml_descr = REXML::Document.new descr
      descr_changed = false

      # additional disk bus
      config.disks.each do |disk|
        device = disk[:device]
        bus = disk[:bus]
        REXML::XPath.each(xml_descr, '/domain/devices/disk[@device="disk"]/target[@dev="' + device + '"]') do |disk_target|
          next unless disk_target.attributes['bus'] != bus
          descr_changed = true
          disk_target.attributes['bus'] = bus
          disk_target.parent.delete_element("#{disk_target.parent.xpath}/address")
        end
      end

      # disk_bus
      REXML::XPath.each(xml_descr, '/domain/devices/disk[@device="disk"]/target[@dev="vda"]') do |disk_target|
        next unless disk_target.attributes['bus'] != config.disk_bus
        descr_changed = true
        disk_target.attributes['bus'] = config.disk_bus
        disk_target.parent.delete_element("#{disk_target.parent.xpath}/address")
      end

      # Iterface type
      unless config.nic_model_type.nil?
        REXML::XPath.each(xml_descr, '/domain/devices/interface/model') do |iface_model|
          if iface_model.attributes['type'] != config.nic_model_type
            descr_changed = true
            iface_model.attributes['type'] = config.nic_model_type
          end
        end
      end

      # vCpu count
      if config.cpus.to_i != libvirt_domain.num_vcpus(0)
        descr_changed = true
        REXML::XPath.first(xml_descr, '/domain/vcpu').text = config.cpus
      end

      # cpu_mode
      cpu = REXML::XPath.first(xml_descr, '/domain/cpu')
      if cpu.nil?
        descr_changed = true
        cpu = REXML::Element.new('cpu', REXML::XPath.first(xml_descr, '/domain'))
        cpu.attributes['mode'] = config.cpu_mode
      else
        if cpu.attributes['mode'] != config.cpu_mode
          descr_changed = true
          cpu.attributes['mode'] = config.cpu_mode
        end
      end

      if config.cpu_mode != 'host-passthrough'
        cpu_model = REXML::XPath.first(xml_descr, '/domain/cpu/model')
        if cpu_model.nil?
          descr_changed = true
          cpu_model = REXML::Element.new('model', REXML::XPath.first(xml_descr, '/domain/cpu'))
          cpu_model.attributes['fallback'] = 'allow'
          cpu_model.text = config.cpu_model
        else
          if cpu_model.text.strip != config.cpu_model.strip
            descr_changed = true
            cpu_model.text = config.cpu_model
          end
          if cpu_model.attributes['fallback'] != config.cpu_fallback
            descr_changed = true
            cpu_model.attributes['fallback'] = config.cpu_fallback
          end
        end
        vmx_feature = REXML::XPath.first(xml_descr, '/domain/cpu/feature[@name="vmx"]')
        svm_feature = REXML::XPath.first(xml_descr, '/domain/cpu/feature[@name="svm"]')
        if config.nested
          if vmx_feature.nil?
            descr_changed = true
            vmx_feature = REXML::Element.new('feature', REXML::XPath.first(xml_descr, '/domain/cpu'))
            vmx_feature.attributes['policy'] = 'optional'
            vmx_feature.attributes['name'] = 'vmx'
          end
          if svm_feature.nil?
            descr_changed = true
            svm_feature = REXML::Element.new('feature', REXML::XPath.first(xml_descr, '/domain/cpu'))
            svm_feature.attributes['policy'] = 'optional'
            svm_feature.attributes['name'] = 'svm'
          end
        else
          unless vmx_feature.nil?
            descr_changed = true
            cpu.delete_element(vmx_feature)
          end
          unless svm_feature.nil?
            descr_changed = true
            cpu.delete_element(svm_feature)
          end
        end
      elsif config.numa_nodes == nil
        unless cpu.elements.to_a.empty?
          descr_changed = true
          cpu.elements.each do |elem|
            cpu.delete_element(elem)
          end
        end
      end

      # Graphics
      graphics = REXML::XPath.first(xml_descr, '/domain/devices/graphics')
      if config.graphics_type != 'none'
        if graphics.nil?
          descr_changed = true
          graphics = REXML::Element.new('graphics', REXML::XPath.first(xml_descr, '/domain/devices'))
        end
        if graphics.attributes['type'] != config.graphics_type
          descr_changed = true
          graphics.attributes['type'] = config.graphics_type
        end
        if graphics.attributes['listen'] != config.graphics_ip
          descr_changed = true
          graphics.attributes['listen'] = config.graphics_ip
          graphics.delete_element('//listen')
        end
        if graphics.attributes['autoport'] != config.graphics_autoport
          descr_changed = true
          graphics.attributes['autoport'] = config.graphics_autoport
          if config.graphics_autoport == 'no'
            graphics.attributes['port'] = config.graphics_port
          end
        end
        if graphics.attributes['keymap'] != config.keymap
          descr_changed = true
          graphics.attributes['keymap'] = config.keymap
        end
        if graphics.attributes['passwd'] != config.graphics_passwd
          descr_changed = true
          if config.graphics_passwd.nil?
            graphics.attributes.delete 'passwd'
          else
            graphics.attributes['passwd'] = config.graphics_passwd
          end
        end
      else
        # graphics_type = none, remove entire element
        graphics.parent.delete_element(graphics) unless graphics.nil?
      end

      # TPM
      if config.tpm_path
        raise Errors::FogCreateServerError, 'The TPM Path must be fully qualified' unless config.tpm_path[0].chr == '/'

        tpm = REXML::XPath.first(xml_descr, '/domain/devices/tpm')
        if tpm.nil?
          descr_changed = true
          tpm = REXML::Element.new('tpm', REXML::XPath.first(xml_descr, '/domain/devices/tpm/model'))
          tpm.attributes['model'] = config.tpm_model
          tpm_backend_type = tpm.add_element('backend')
          tpm_backend_type.attributes['type'] = config.tpm_type
          tpm_device_path = tpm_backend_type.add_element('device')
          tpm_device_path.attributes['path'] = config.tpm_path
        else
          if tpm.attributes['model'] != config.tpm_model
            descr_changed = true
            tpm.attributes['model'] = config.tpm_model
          end
          if tpm.elements['backend'].attributes['type'] != config.tpm_type
            descr_changed = true
            tpm.elements['backend'].attributes['type'] = config.tpm_type
          end
          if tpm.elements['backend'].elements['device'].attributes['path'] != config.tpm_path
            descr_changed = true
            tpm.elements['backend'].elements['device'].attributes['path'] = config.tpm_path
          end
        end
      end

      # Video device
      video = REXML::XPath.first(xml_descr, '/domain/devices/video')
      if !video.nil? && (config.graphics_type == 'none')
        # graphics_type = none, video devices are removed since there is no possible output
        descr_changed = true
        video.parent.delete_element(video)
      else
        video_model = REXML::XPath.first(xml_descr, '/domain/devices/video/model')
        if video_model.nil?
          video_model = REXML::Element.new('model', REXML::XPath.first(xml_descr, '/domain/devices/video'))
          video_model.attributes['type'] = config.video_type
          video_model.attributes['vram'] = config.video_vram
        else
          if video_model.attributes['type'] != config.video_type || video_model.attributes['vram'] != config.video_vram
            descr_changed = true
            video_model.attributes['type'] = config.video_type
            video_model.attributes['vram'] = config.video_vram
          end
        end
      end

      # Sound device
      if config.sound_type
        sound = REXML::XPath.first(xml_descr,'/domain/devices/sound/model')
      end


      # dtb
      if config.dtb
        dtb = REXML::XPath.first(xml_descr, '/domain/os/dtb')
        if dtb.nil?
          descr_changed = true
          dtb = REXML::Element.new('dtb', REXML::XPath.first(xml_descr, '/domain/os'))
          dtb.text = config.dtb
        else
          if dtb.text != config.dtb
            descr_changed = true
            dtb.text = config.dtb
          end
        end
      end

      # kernel and initrd
      if config.kernel
        kernel = REXML::XPath.first(xml_descr, '/domain/os/kernel')
        if kernel.nil?
          descr_changed = true
          kernel = REXML::Element.new('kernel', REXML::XPath.first(xml_descr, '/domain/os'))
          kernel.text = config.kernel
        else
          if kernel.text != config.kernel
            descr_changed = true
            kernel.text = config.kernel
          end
        end
      end
      if config.initrd
        initrd = REXML::XPath.first(xml_descr, '/domain/os/initrd')
        if initrd.nil?
          descr_changed = true
          initrd = REXML::Element.new('initrd', REXML::XPath.first(xml_descr, '/domain/os'))
          initrd.text = config.initrd
        else
          if initrd.text != config.initrd
            descr_changed = true
            initrd.text = config.initrd
          end
        end
      end

      # Apply
      if descr_changed
        begin
          libvirt_domain.undefine
          new_descr = ''
          xml_descr.write new_descr
          server = env[:machine].provider.driver.connection.servers.create(xml: new_descr)
        rescue Fog::Errors::Error => e
          server = env[:machine].provider.driver.connection.servers.create(xml: descr)
          raise Errors::FogCreateServerError, error_message: e.message
        end
      end
    rescue => e
      env[:ui].error("Error when updating domain settings: #{e.message}")
    end
    # Autostart with host if enabled in Vagrantfile
    libvirt_domain.autostart = config.autostart
    # Actually start the domain
    domain.start
  rescue => e
    raise Errors::FogError, message: e.message
  end

  @app.call(env)
end