OpenStack:添加新nova计算节点时出现异常

我正在尝试将一个新的nova计算节点（KUubuntu 12.04）添加到运行在Ubuntu12.04 LTS上的单节点OpenStack（Essex发行版）安装中。但是，我得到以下错误：-

2012-06-22 14:05:12 INFO nova.rpc.common [-] Reconnecting to AMQP server on localhost:5672
2012-06-22 14:05:12 ERROR nova.rpc.common [-] AMQP server on localhost:5672 is unreachable: [Errno 111] ECONNREFUSED. Trying again in 27 seconds.
2012-06-22 14:05:12 TRACE nova.rpc.common Traceback (most recent call last):
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/nova/rpc/impl_kombu.py", line 446, in reconnect
2012-06-22 14:05:12 TRACE nova.rpc.common     self._connect()
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/nova/rpc/impl_kombu.py", line 423, in _connect
2012-06-22 14:05:12 TRACE nova.rpc.common     self.connection.connect()
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 154, in connect
2012-06-22 14:05:12 TRACE nova.rpc.common     return self.connection
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 560, in connection
2012-06-22 14:05:12 TRACE nova.rpc.common     self._connection = self._establish_connection()
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 521, in _establish_connection
2012-06-22 14:05:12 TRACE nova.rpc.common     conn = self.transport.establish_connection()
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 255, in establish_connection
2012-06-22 14:05:12 TRACE nova.rpc.common     connect_timeout=conninfo.connect_timeout)
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 52, in __init__
2012-06-22 14:05:12 TRACE nova.rpc.common     super(Connection, self).__init__(*args, **kwargs)
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/connection.py", line 129, in __init__
2012-06-22 14:05:12 TRACE nova.rpc.common     self.transport = create_transport(host, connect_timeout, ssl)
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/transport.py", line 281, in create_transport
2012-06-22 14:05:12 TRACE nova.rpc.common     return TCPTransport(host, connect_timeout)
2012-06-22 14:05:12 TRACE nova.rpc.common   File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/transport.py", line 85, in __init__
2012-06-22 14:05:12 TRACE nova.rpc.common     raise socket.error, msg
2012-06-22 14:05:12 TRACE nova.rpc.common error: [Errno 111] ECONNREFUSED
2012-06-22 14:05:12 TRACE nova.rpc.common 

---

错误的原因是什么以及如何修复此错误？

正如您所指出的，您的配置缺少--rabbit\u host=。。。标志，指示在何处找到OpenStack云的RabbitMQ服务。默认值是localhost

nova接受的其他兔子旗：

--rabbit_host=...
--rabbit_port=...
--rabbit_virtual_host=/
--rabbit_use_ssl
--rabbit_userid=...
--rabbit_password=...

---

正如您所注意到的，您的配置缺少--rabbit_host=。。。标志，指示在何处找到OpenStack云的RabbitMQ服务。默认值是localhost

nova接受的其他兔子旗：

--rabbit_host=...
--rabbit_port=...
--rabbit_virtual_host=/
--rabbit_use_ssl
--rabbit_userid=...
--rabbit_password=...

---

我找到了解决办法。您需要在要添加到集群的新节点上将--rabbit\u host=CC\u ADDR添加到/etc/nova/nova.conf。CC_ADDR是云控制器的ip。我找到了解决方案。您需要在要添加到集群的新节点上将--rabbit\u host=CC\u ADDR添加到/etc/nova/nova.conf。CC_ADDR是云控制器的ip。当我在

rabbit_host

之前给出“-”时，它开始工作。这些“-”的目的是什么？这只是openstack使用的复杂参数的机制/约定。对于复杂的可选参数来说相当标准。我在官方文档中没有看到“-”，当我在

rabbit\u host

之前给出“-”时，这个“-”的确切用途/来源是什么。这些“-”的目的是什么？这只是openstack使用的复杂参数的机制/约定。对于复杂的可选参数来说相当标准。我在官方文档中没有看到“-”，这个“-”的确切用途/来源是什么？