两个节点安装openstack，计算节点compute服务启动问题，求大神指点

1个控制节点，1个计算节点，
启动计算节点报错
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Attempting to grab file lock "ensure_bridge" for method "ensure_bridge"... from (pid=2674) inner /usr/lib/python2.6/site-packages/nova/utils.py:936
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Got file lock "ensure_bridge" for method "ensure_bridge"... from (pid=2674) inner /usr/lib/python2.6/site-packages/nova/utils.py:943
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Running cmd (subprocess): ip link show dev br100 from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:220
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Running cmd (subprocess): sudo nova-rootwrap brctl addif br100 em1 from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:220
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Result was 1 from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:236
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Running cmd (subprocess): sudo nova-rootwrap route -n from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:220
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Running cmd (subprocess): sudo nova-rootwrap ip addr show dev em1 scope global from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:220
2012-11-16 17:08:51 DEBUG nova.utils [req-f86f2bdf-216e-4850-aa5b-95a5038a154b None None] Result was 255 from (pid=2674) execute /usr/lib/python2.6/site-packages/nova/utils.py:236
2012-11-16 17:08:51 CRITICAL nova [-] Unexpected error while running command.
Command: sudo nova-rootwrap ip addr show dev em1 scope global
Exit code: 255
Stdout: ''
Stderr: 'Device "em1" does not exist.\n'
2012-11-16 17:08:51 TRACE nova Traceback (most recent call last):
2012-11-16 17:08:51 TRACE nova   File "/usr/bin/nova-compute", line 49, in
2012-11-16 17:08:51 TRACE nova     service.wait()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/service.py", line 413, in wait
2012-11-16 17:08:51 TRACE nova     _launcher.wait()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/service.py", line 131, in wait
2012-11-16 17:08:51 TRACE nova     service.wait()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 166, in wait
2012-11-16 17:08:51 TRACE nova     return self._exit_event.wait()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/eventlet/event.py", line 116, in wait
2012-11-16 17:08:51 TRACE nova     return hubs.get_hub().switch()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/eventlet/hubs/hub.py", line 177, in switch
2012-11-16 17:08:51 TRACE nova     return self.greenlet.switch()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 192, in main
2012-11-16 17:08:51 TRACE nova     result = function(*args, **kwargs)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/service.py", line 101, in run_server
2012-11-16 17:08:51 TRACE nova     server.start()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/service.py", line 162, in start
2012-11-16 17:08:51 TRACE nova     self.manager.init_host()
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 255, in init_host
2012-11-16 17:08:51 TRACE nova     self.driver.plug_vifs(instance, legacy_net_info)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/connection.py", line 391, in plug_vifs
2012-11-16 17:08:51 TRACE nova     self.vif_driver.plug(instance, network, mapping)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/vif.py", line 97, in plug
2012-11-16 17:08:51 TRACE nova     iface)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/utils.py", line 944, in inner
2012-11-16 17:08:51 TRACE nova     retval = f(*args, **kwargs)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/network/linux_net.py", line 1028, in ensure_bridge
2012-11-16 17:08:51 TRACE nova     'scope', 'global', run_as_root=True)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/network/linux_net.py", line 813, in _execute
2012-11-16 17:08:51 TRACE nova     return utils.execute(*cmd, **kwargs)
2012-11-16 17:08:51 TRACE nova   File "/usr/lib/python2.6/site-packages/nova/utils.py", line 243, in execute
2012-11-16 17:08:51 TRACE nova     cmd=' '.join(cmd))
2012-11-16 17:08:51 TRACE nova ProcessExecutionError: Unexpected error while running command.
2012-11-16 17:08:51 TRACE nova Command: sudo nova-rootwrap ip addr show dev em1 scope global
2012-11-16 17:08:51 TRACE nova Exit code: 255
2012-11-16 17:08:51 TRACE nova Stdout: ''
2012-11-16 17:08:51 TRACE nova Stderr: 'Device "em1" does not exist.\n'
2012-11-16 17:08:51 TRACE nova
不知道em1 是什么玩意啊。。。
控制节点情况：
Binary           Host                                 Zone             Status     State Updated_At
nova-compute     openstack-compute.ubisoft.org        nova             enabled    XXX   2012-11-16 07:52:50
nova-scheduler   nova-controller                      nova             enabled    :-)   2012-11-16 08:59:24
nova-consoleauth nova-controller                      nova             enabled    :-)   2012-11-16 08:59:16
nova-network     openstack-compute.ubisoft.org        nova             enabled    :-)   2012-11-16 08:59:18
nova-network     nova-controller                      nova             enabled    :-)   2012-11-16 08:59:24
nova-volume      nova-controller                      nova             enabled    :-)   2012-11-16 08:59:24
root@nova-controller:~#
              
               
               

            em1 是网卡的别名，就像 eth0, eth1之类的东西。
从此可见，你的系统应该不是centos服务器版本。
问题不知道如何解决，顶一下吧。
        

            你可以到/etc/sysconfig/network-scripts下看看你的网卡情况，是不是有这个网卡？估计是网卡没有激活，比如“ONBOOT=yes”。
感觉是网络配置的问题较大。