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[Eli Qiao <liyong.qiao@xxxxxxxxx>]

Public bug reported:

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 457, in fire_timers
    timer()
  File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/timer.py", line 58, in __call__
    cb(*args, **kw)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 168, in _do_send
    waiter.switch(result)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 5433, in _live_migration_operation
    instance=instance)
  File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 5402, in _live_migration_operation
    CONF.libvirt.live_migration_bandwidth)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
    result = proxy_call(self._autowrap, f, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call
    rv = execute(f, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
    six.reraise(c, e, tb)
  File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
    rv = meth(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1582, in migrateToURI2
    if ret == -1: raise libvirtError ('virDomainMigrateToURI2() failed', dom=self)
libvirtError: Invalid value '0-15' for 'cpuset.cpus': Invalid argument

 Reproduce steps:

there are 2 compute hosts:
hostA: 16 cpu
hostB: 4cpu

1. create an instance  test1 (which run on hostA)
2. do live migration on test1 from hostA to hostB

Expected result:
test1 live migrate to hostB

Actual result:
failed due to cpu set invalid.


findings:
workaround is set vcpu_pin_set = "0-3" on hostA's nova.conf default section.

** Affects: nova
     Importance: Undecided
     Assignee: Eli Qiao (taget-9)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Eli Qiao (taget-9)

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https://bugs.launchpad.net/bugs/1440981

Title:
  live-migration failed due to invalid value of cpu set

Status in OpenStack Compute (Nova):
  New

Bug description:
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 457, in fire_timers
      timer()
    File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/timer.py", line 58, in __call__
      cb(*args, **kw)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 168, in _do_send
      waiter.switch(result)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main
      result = function(*args, **kwargs)
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 5433, in _live_migration_operation
      instance=instance)
    File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 5402, in _live_migration_operation
      CONF.libvirt.live_migration_bandwidth)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
      result = proxy_call(self._autowrap, f, *args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call
      rv = execute(f, *args, **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
      six.reraise(c, e, tb)
    File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
      rv = meth(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1582, in migrateToURI2
      if ret == -1: raise libvirtError ('virDomainMigrateToURI2() failed', dom=self)
  libvirtError: Invalid value '0-15' for 'cpuset.cpus': Invalid argument

   Reproduce steps:

  there are 2 compute hosts:
  hostA: 16 cpu
  hostB: 4cpu

  1. create an instance  test1 (which run on hostA)
  2. do live migration on test1 from hostA to hostB

  Expected result:
  test1 live migrate to hostB

  Actual result:
  failed due to cpu set invalid.

  
  findings:
  workaround is set vcpu_pin_set = "0-3" on hostA's nova.conf default section.

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