Synnefo » snf-ganeti » ganeti-local

  def BalloonInstanceMemory(self, instance, mem):

    """Balloon an instance memory to a certain value.

    @type instance: L{objects.Instance}

    @param instance: instance to be accepted

    @type mem: int

    @param mem: actual memory size to use for instance runtime

    """

    cmd = [constants.XEN_CMD, "mem-set", instance.name, mem]

    result = utils.RunCmd(cmd)

    if result.failed:

      raise errors.HypervisorError("Failed to balloon instance %s: %s (%s)" %

                                   (instance.name, result.fail_reason,

                                    result.output))

    cmd = ["sed", "-ie", "s/^memory.*$/memory = %s/" % mem]

    cmd.append(XenHypervisor._ConfigFileName(instance.name))

    result = utils.RunCmd(cmd)

    if result.failed:

      raise errors.HypervisorError("Failed to update memory for %s: %s (%s)" %

                                   (instance.name, result.fail_reason,

                                    result.output))