Class: VagrantPlugins::ProviderLibvirt::Driver

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

Constant Summary collapse

@@connection =

store the connection at the process level

possibly this should be a connection pool using the connection settings as a key to allow per machine connection attributes to be used.

nil
@@system_connection =
nil

Instance Method Summary collapse

Constructor Details

#initialize(machine) ⇒ Driver

Returns a new instance of Driver.


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# File 'lib/vagrant-libvirt/driver.rb', line 16

def initialize(machine)
  @logger = Log4r::Logger.new('vagrant_libvirt::driver')
  @machine = machine
end

Instance Method Details

#connectionObject


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# File 'lib/vagrant-libvirt/driver.rb', line 21

def connection
  # If already connected to Libvirt, just use it and don't connect
  # again.
  return @@connection if @@connection

  # Get config options for Libvirt provider.
  config = @machine.provider_config
  uri = config.uri

  conn_attr = {}
  conn_attr[:provider] = 'libvirt'
  conn_attr[:libvirt_uri] = uri
  conn_attr[:libvirt_username] = config.username if config.username
  conn_attr[:libvirt_password] = config.password if config.password

  # Setup command for retrieving IP address for newly created machine
  # with some MAC address. Get it from dnsmasq leases table
  ip_command = %q( awk "/$mac/ {print \$1}" /proc/net/arp )
  conn_attr[:libvirt_ip_command] = ip_command

  @logger.info("Connecting to Libvirt (#{uri}) ...")
  begin
    @@connection = Fog::Compute.new(conn_attr)
  rescue Fog::Errors::Error => e
    raise Errors::FogLibvirtConnectionError,
          error_message: e.message
  end

  @@connection
end

#created?(mid) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/vagrant-libvirt/driver.rb', line 78

def created?(mid)
  domain = get_domain(mid)
  !domain.nil?
end

#get_domain(mid) ⇒ Object


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# File 'lib/vagrant-libvirt/driver.rb', line 63

def get_domain(mid)
  begin
    domain = connection.servers.get(mid)
  rescue Libvirt::RetrieveError => e
    if e.libvirt_code == ProviderLibvirt::Util::ErrorCodes::VIR_ERR_NO_DOMAIN
      @logger.debug("machine #{mid} not found #{e}.")
      return nil
    else
      raise e
    end
  end

  domain
end

#get_ipaddress(machine) ⇒ Object


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# File 'lib/vagrant-libvirt/driver.rb', line 83

def get_ipaddress(machine)
  # Find the machine
  domain = get_domain(machine.id)
  if @machine.provider_config.qemu_use_session
    return get_ipaddress_system domain.mac
  end

  if domain.nil?
    # The machine can't be found
    return nil
  end

  # Get IP address from arp table
  ip_address = nil
  begin
    domain.wait_for(2) do
      addresses.each_pair do |_type, ip|
        # Multiple leases are separated with a newline, return only
        # the most recent address
        ip_address = ip[0].split("\n").first unless ip[0].nil?
      end
      !ip_address.nil?
    end
  rescue Fog::Errors::TimeoutError
    @logger.info('Timeout at waiting for an ip address for machine %s' % machine.name)
  end

  unless ip_address
    @logger.info('No arp table entry found for machine %s' % machine.name)
    return nil
  end

  ip_address
end

#get_ipaddress_system(mac) ⇒ Object


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# File 'lib/vagrant-libvirt/driver.rb', line 118

def get_ipaddress_system(mac)
  ip_address = nil

  system_connection.list_all_networks.each do |net|
    leases = net.dhcp_leases(mac, 0)
    # Assume the lease expiring last is the current IP address
    ip_address = leases.sort_by { |lse| lse["expirytime"] }.last["ipaddr"] if !leases.empty?
    break if ip_address
  end

  return ip_address
end

#state(machine) ⇒ Object


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# File 'lib/vagrant-libvirt/driver.rb', line 131

def state(machine)
  # may be other error states with initial retreival we can't handle
  begin
    domain = get_domain(machine.id)
  rescue Libvirt::RetrieveError => e
    @logger.debug("Machine #{machine.id} not found #{e}.")
    return :not_created
  end

  # TODO: terminated no longer appears to be a valid fog state, remove?
  return :not_created if domain.nil? || domain.state.to_sym == :terminated

  domain.state.tr('-', '_').to_sym
end

#system_connectionObject


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# File 'lib/vagrant-libvirt/driver.rb', line 52

def system_connection
  # If already connected to Libvirt, just use it and don't connect
  # again.
  return @@system_connection if @@system_connection

  config = @machine.provider_config

  @@system_connection = Libvirt::open_read_only(config.system_uri)
  @@system_connection
end