[Yahoo-eng-team] [Bug 1654504] [NEW] Resize instance which is booted from volume failed

Tao Li Fri, 06 Jan 2017 00:21:55 -0800

Public bug reported:

Description
===========


When instance was booted from volume, but the driver will consider it booted 
from image in resize
scenario. This bug is introduced by the bug path:  bug #1587802. 

Steps to reproduce
==================

1. Booting an instance from volume with flavor m1.small。
2. Resize the instance to m1.tiny。


Expected result
===============
Resize the instance succefully.

Actual result
=============
Exception was raised as follows.

2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 3964, in 
_finish_resize
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     block_device_info, power_on)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 7417, in 
finish_migration
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     
fallback_from_host=migration.source_compute)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3180, in 
_create_image
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     
backend.create_snap(libvirt_utils.RESIZE_SNAPSHOT_NAME)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 944, 
in create_snap
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     return 
self.driver.create_snap(self.rbd_name, name)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
381, in create_snap
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     with RBDVolumeProxy(self, 
str(volume), pool=pool) as vol:
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
65, in __init__
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     driver._disconnect_from_rados(client, 
ioctx)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     self.force_reraise()
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     six.reraise(self.type_, self.value, 
self.tb)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
61, in __init__
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     read_only=read_only)
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/rbd.py", line 374, in __init__
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     raise make_ex(ret, 'error opening 
image %s at snapshot %s' % (name, snapshot))
2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc] ImageNotFound: error opening image 
496d2d53-5a57-44bf-93c4-26baec9a9bbc_disk at snapshot None

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1654504

Title:
  Resize instance which is booted from volume failed

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========

  When instance was booted from volume, but the driver will consider it booted 
from image in resize
  scenario. This bug is introduced by the bug path:  bug #1587802. 

  Steps to reproduce
  ==================

  1. Booting an instance from volume with flavor m1.small。
  2. Resize the instance to m1.tiny。

  
  Expected result
  ===============
  Resize the instance succefully.

  Actual result
  =============
  Exception was raised as follows.

  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 3964, in 
_finish_resize
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     block_device_info, power_on)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 7417, in 
finish_migration
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     
fallback_from_host=migration.source_compute)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3180, in 
_create_image
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     
backend.create_snap(libvirt_utils.RESIZE_SNAPSHOT_NAME)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/imagebackend.py", line 944, 
in create_snap
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     return 
self.driver.create_snap(self.rbd_name, name)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
381, in create_snap
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     with RBDVolumeProxy(self, 
str(volume), pool=pool) as vol:
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
65, in __init__
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     driver._disconnect_from_rados(client, 
ioctx)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     self.force_reraise()
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     six.reraise(self.type_, self.value, 
self.tb)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/storage/rbd_utils.py", line 
61, in __init__
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     read_only=read_only)
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]   File 
"/usr/lib/python2.7/site-packages/rbd.py", line 374, in __init__
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc]     raise make_ex(ret, 'error opening 
image %s at snapshot %s' % (name, snapshot))
  2017-01-06 15:30:44.200 7947 ERROR nova.compute.manager [instance: 
496d2d53-5a57-44bf-93c4-26baec9a9bbc] ImageNotFound: error opening image 
496d2d53-5a57-44bf-93c4-26baec9a9bbc_disk at snapshot None

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[Yahoo-eng-team] [Bug 1654504] [NEW] Resize instance which is booted from volume failed

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