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[Shuangtai Tian <shuangtai.tian@xxxxxxxxx>]

Public bug reported:

In the libvirt.driver, we now use the code like this:
(state, _max_mem, _mem, _cpus, _t) = virt_dom.info()

if the libvirt add new variables in the domain info, the code will be failed.
the error will like this :
 File "/opt/stack/nova/nova/service.py", line 180, in start
    self.manager.init_host()
  File "/opt/stack/nova/nova/compute/manager.py", line 974, in init_host
    self._init_instance(context, instance)
  File "/opt/stack/nova/nova/compute/manager.py", line 882, in _init_instance
    drv_state = self._get_power_state(context, instance)
  File "/opt/stack/nova/nova/compute/manager.py", line 990, in _get_power_state
    return self.driver.get_info(instance)["state"]
  File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3462, in get_info
    (state, max_mem, mem, num_cpu, cpu_time) = virt_dom.info()
ValueError: too many values to unpack

** Affects: ceilometer
     Importance: Undecided
     Assignee: Shuangtai Tian (shuangtai-tian)
         Status: New

** Affects: nova
     Importance: Undecided
     Assignee: Shuangtai Tian (shuangtai-tian)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Shuangtai Tian (shuangtai-tian)

** Also affects: ceilometer
   Importance: Undecided
       Status: New

** Changed in: ceilometer
     Assignee: (unassigned) => Shuangtai Tian (shuangtai-tian)

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https://bugs.launchpad.net/bugs/1291805

Title:
  Don't change list to tuple when get info from libvirt

Status in OpenStack Telemetry (Ceilometer):
  New
Status in OpenStack Compute (Nova):
  New

Bug description:
  In the libvirt.driver, we now use the code like this:
  (state, _max_mem, _mem, _cpus, _t) = virt_dom.info()

  if the libvirt add new variables in the domain info, the code will be failed.
  the error will like this :
   File "/opt/stack/nova/nova/service.py", line 180, in start
      self.manager.init_host()
    File "/opt/stack/nova/nova/compute/manager.py", line 974, in init_host
      self._init_instance(context, instance)
    File "/opt/stack/nova/nova/compute/manager.py", line 882, in _init_instance
      drv_state = self._get_power_state(context, instance)
    File "/opt/stack/nova/nova/compute/manager.py", line 990, in _get_power_state
      return self.driver.get_info(instance)["state"]
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 3462, in get_info
      (state, max_mem, mem, num_cpu, cpu_time) = virt_dom.info()
  ValueError: too many values to unpack

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