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