安装配置openstack的nova服务中碰到的一个问题（juno）

在控制节点上安装配置完nova之后，运行# nova service-list，屏幕输出如下：

+----+------------------+-------------+----------+---------+-------+------------+-----------------+
| Id | Binary           | Host        | Zone     | Status  | State | Updated_at | Disabled Reason |
+----+------------------+-------------+----------+---------+-------+------------+-----------------+
| 1  | nova-cert        | controller2 | internal | enabled | down  | -          | -               |
| 2  | nova-consoleauth | controller2 | internal | enabled | down  | -          | -               |
| 3  | nova-scheduler   | controller2 | internal | enabled | down  | -          | -               |
| 4  | nova-conductor   | controller2 | internal | enabled | down  | -          | -               |
+----+------------------+-------------+----------+---------+-------+------------+-----------------+

查看日志文件，发现如下错误信息：

2014-11-15 21:24:35.770 9426 ERROR oslo.messaging._drivers.impl_rabbit [req-194639ab-52c9-4714-b682-ced540b61f3d ] AMQP server 192.168.148.100:5672 closed the connection. Check login credentials: Socket closed

查看rabbit的日志文件，发现如下错误信息：

=ERROR REPORT==== 15-Nov-2014::21:24:35 ===
closing AMQP connection <0.310.0> (192.168.148.100:36037 -> 192.168.148.100:5672):
{handshake_error,starting,0,
                 {amqp_error,access_refused,
                             "AMQPLAIN login refused: user 'guest' can only connect via localhost",
                             'connection.start_ok'}}
错误的根源是使用‘guest’用户连接到rabbit只能通过localhost来进行，即远程主机或者本机想要通过eth0来连接rabbit在默认情况在是不可能的。各种百度google之后，发现需要修改配置文件/etc/rabbitmq/rabbitmq.config。配置文件不存在，自己创建一个，并添加一下配置：

[rabbit,[{loopback_users,[]}]}].

重启rabbit，查看nova服务，问题解决