Synnefo » snf-ganeti » ganeti-local

    # Check lv size requirements

    nodenames = [pnode.name] + self.secondaries

    nodeinfo = rpc.call_node_info(nodenames, self.cfg.GetVGName())

    # Required free disk space as a function of disk and swap space

    req_size_dict = {

      constants.DT_DISKLESS: 0,

      constants.DT_PLAIN: self.op.disk_size + self.op.swap_size,

      constants.DT_LOCAL_RAID1: (self.op.disk_size + self.op.swap_size) * 2,

      # 256 MB are added for drbd metadata, 128MB for each drbd device

      constants.DT_REMOTE_RAID1: self.op.disk_size + self.op.swap_size + 256,

    }

    if self.op.disk_template not in req_size_dict:

      raise errors.ProgrammerError, ("Disk template '%s' size requirement"

                                     " is unknown" %  self.op.disk_template)

    req_size = req_size_dict[self.op.disk_template]

    for node in nodenames:

      info = nodeinfo.get(node, None)

      if not info:

        raise errors.OpPrereqError, ("Cannot get current information"

                                     " from node '%s'" % nodeinfo)

      if req_size > info['vg_free']:

        raise errors.OpPrereqError, ("Not enough disk space on target node %s."

                                     " %d MB available, %d MB required" %

                                     (node, info['vg_free'], req_size))