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1)      libvirtError: internal error: Cannot findsuitable emulator  for  x86_64 
解决办法： yum-y  install  libtcmalloc*
 
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2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager [req-6572d17a-f952-4880-99a9-38d32634ec98 - - - - -] Errorupdating resources  for  node l22-250-2.
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager Traceback (most recent call last):
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py" , line6460,  in  update_available_resource
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager    rt.update_available_resource(context)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py" ,line 500,  in  update_available_resource
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager     resources =self.driver.get_available_resource(self.nodename)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py" , line5380,  in  get_available_resource
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager    data[ "hypervisor_version" ] = self._host.get_version()
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/host.py" , line825,  in  get_version
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager     returnself.get_connection().getVersion()
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py" , line 183, indoit
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager     result =proxy_call(self._autowrap, f, *args, **kwargs)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py" , line 141, inproxy_call
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager     rv = execute(f,*args, **kwargs)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py" , line 122, inexecute
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager     six.reraise(c,e, tb)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py" , line 80, intworker
2016-07-27 17:54:12.621 24306 ERROR nova.compute.manager     rv = meth(*args, **kwargs)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager   File "/usr/lib64/python2.7/site-packages/libvirt.py" , line 3868, ingetVersion
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager      if  ret == -1:raise libvirtError ( 'virConnectGetVersion() failed' , conn=self)
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager libvirtError: internal error: Cannot  find  suitableemulator  for  x86_64
2016-07-27 17:54:12.621 24306 ERRORnova.compute.manager
  
qemu-img: error  while  loading shared libraries: libtcmalloc.so.4:cannot  open  shared object  file : No such  file  or directory