Synnefo » snf-ganeti » ganeti-local

    info("detaching primary drbds from the network (=> standalone)")

    done = 0

    for dev in instance.disks:

      # set the physical (unique in bdev terms) id to None, meaning

      # detach from network

      dev.physical_id = (None,) * len(dev.physical_id)

      # and 'find' the device, which will 'fix' it to match the

      # standalone state

      if rpc.call_blockdev_find(pri_node, dev):

        done += 1

      else:

        warning("Failed to detach drbd %s from network, unusual case" %

                dev.iv_name)

    if not done:

      # no detaches succeeded (very unlikely)

      raise errors.OpExecError("Can't detach at least one DRBD from old node")

    # if we managed to detach at least one, we update all the disks of

    # the instance to point to the new secondary

    info("updating instance configuration")

    for dev in instance.disks:

      dev.logical_id = (pri_node, new_node) + dev.logical_id[2:]

    cfg.Update(instance)

    # and now perform the drbd attach

    info("attaching primary drbds to new secondary (standalone => connected)")

    failures = []

    for dev in instance.disks:

      info("attaching primary drbd for %s to new secondary node" % dev.iv_name)

      # since the attach is smart, it's enough to 'find' the device,

      # it will automatically activate the network, if the physical_id

      # is correct

      cfg.SetDiskID(dev, pri_node)

      if not rpc.call_blockdev_find(pri_node, dev):

        warning("can't attach drbd %s to new secondary!" % dev.iv_name,

                "please do a gnt-instance info to see the status of disks")