# == Class: nova::compute::libvirt_guests
#
# manages configuration for starting running instances when compute node
# gets rebooted.
#
# === Parameters:
#
# [*enabled*]
#   (optional) Whether the libvirt-guests service will be run
#   Defaults to false
#
# [*package_ensure*]
#   (optional) The state of libvirt packages
#   Defaults to 'present'
#
# [*on_boot*]
#   (optional) libvirt-guests parameter - action taken on host boot
#   - start  all guests which were running on shutdown are started on boot
#            regardless on their autostart settings
#   - ignore libvirt-guests init script won't start any guest on boot, however,
#            guests marked as autostart will still be automatically started by
#            libvirtd
#   Defaults to 'ignore'
#
# [*on_shutdown*]
#   (optional) libvirt-guests parameter - action taken on host shutdown
#   - suspend  all running guests are suspended using virsh managedsave
#   - shutdown all running guests are asked to shutdown. Please be careful with
#              this settings since there is no way to distinguish between a
#              guest which is stuck or ignores shutdown requests and a guest
#              which just needs a long time to shutdown. When setting
#              ON_SHUTDOWN=shutdown, you must also set SHUTDOWN_TIMEOUT to a
#              value suitable for your guests.
#   Defaults to 'shutdown'
#
# [*shutdown_timeout*]
#   (optional) Number of seconds we're willing to wait for a guest to shut
#   down. If parallel shutdown is enabled, this timeout applies as a timeout
#   for shutting down all guests on a single URI defined in the variable URIS.
#   If this is 0, then there is no time out (use with caution, as guests might
#   not respond to a shutdown request). The default value is 300 seconds
#   (5 minutes).
#   Defaults to 300.
#
# [*manage_service*]
#   (optional) Whether to start/stop the service
#   Defaults to false
#
class nova::compute::libvirt_guests (
  $enabled                           = false,
  $package_ensure                    = 'present',
  $shutdown_timeout                  = '300',
  $on_boot                           = 'ignore',
  $on_shutdown                       = 'shutdown',
  $manage_service                    = false,
) {
  include ::nova::params
  include ::nova::deps

  Anchor['nova::config::begin']
  -> File_line<| tag == 'libvirt-guests-file_line'|>
  -> Anchor['nova::config::end']

  case $::osfamily {
    'RedHat': {
      file_line { '/etc/sysconfig/libvirt-guests ON_BOOT':
        path  => '/etc/sysconfig/libvirt-guests',
        line  => "ON_BOOT=${on_boot}",
        match => '^#?ON_BOOT=.*',
        tag   => 'libvirt-guests-file_line',
      }

      file_line { '/etc/sysconfig/libvirt-guests ON_SHUTDOWN':
        path  => '/etc/sysconfig/libvirt-guests',
        line  => "ON_SHUTDOWN=${on_shutdown}",
        match => '^#?ON_SHUTDOWN=.*',
        tag   => 'libvirt-guests-file_line',
      }

      file_line { '/etc/sysconfig/libvirt-guests SHUTDOWN_TIMEOUT':
        path  => '/etc/sysconfig/libvirt-guests',
        line  => "SHUTDOWN_TIMEOUT=${shutdown_timeout}",
        match => '^#?SHUTDOWN_TIMEOUT=.*',
        tag   => 'libvirt-guests-file_line',
      }

      nova::generic_service { 'libvirt-guests':
        enabled        => $enabled,
        manage_service => $manage_service,
        package_name   => $::nova::params::libvirt_guests_package_name,
        service_name   => $::nova::params::libvirt_guests_service_name,
        ensure_package => $package_ensure
      }
    }
    default:  {
      warning("Unsupported osfamily: ${::osfamily}, make sure you are configuring this yourself")
    }
  }
}