一、排错方法：
1、查看日志路径为/var/log，具体哪个组件出了问题进入其目录查看。
2、debug
root@sc-ctrl01:~# keystone --debug user-list root@sc-ctrl01:~# nova --debug list
3、grep
root@sc-ctrl01:~# grep -ri error /var/log/*
二、具体错误：
1、登录dashboard显示错误，
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" alt="" width="247" height="295" />
查看日志/var/log/upstart/neutron-server.log
2015-01-06 17:41:07.571 11110 ERROR neutron.openstack.common.rpc.common [-] AMQP server on localhost:5672 is unreachable: Socket closed. Trying again in 30 seconds.
是因为neutron寻找rabbitMQ服务错误，定位到localhost:5672。解决：在/etc/neutron/neutron.conf中检查所有和rabbitmq相关配置：
rabbit_host =10.1.101.11
rabbit_password = password
rabbit_port = 5672
rabbit_hosts =controller:5672
rabbit_userid = guest
然后重启neutron服务和rabbitmq服务。
cd /etc/init.d/; for i in $( ls neutron-* ); do sudo service $i restart; done
service rabbitmq-server restart
------------------------------------
查看rabbitmq服务是否允许在rabbit服务器
# systemctl status rabbitmq-server.service -l
查看rabbitmq状态
#rabbitmqctl status
查看guest是否存在：
# rabbitmqctl list_users |grep guest
修改密码：
#rabbitmqctl change_password guest somepassword
查看compute节点是否可以和rabbit 服务器建立连接
#lsof -i :5672|grep 'compute_node_ip'
2、创建虚拟机失败：错误： 创建实例 "vm001" 失败: 请稍后再试 [错误: No valid host was found. ].
先查看compute是否已经起了，在controller节点执行nova service-list
root@ubuntu:~# nova service-list
+------------------+--------+----------+---------+-------+----------------------------+-----------------+
| Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+------------------+--------+----------+---------+-------+----------------------------+-----------------+
| nova-conductor | ubuntu | internal | enabled | up | 2015-01-08T01:10:32.000000 | - |
| nova-cert | ubuntu | internal | enabled | up | 2015-01-08T01:10:35.000000 | - |
| nova-consoleauth | ubuntu | internal | enabled | up | 2015-01-08T01:10:27.000000 | - |
| nova-scheduler | ubuntu | internal | enabled | up | 2015-01-08T01:10:27.000000 | - |
+------------------+--------+----------+---------+-------+----------------------------+-----------------+
可以看到nova-compute服务没有起，
我是在Ubuntu虚拟机上部署，因为hypervisor/CPU不支持虚拟化，可以通过命令$ egrep -c '(vmx|svm)' /proc/cpuinfo查看，如果返回0就是不支持。
所以要将/etc/nova/nova-compute.conf内容替换为：
[DEFAULT]
compute_driver=libvirt.LibvirtDriver
[libvirt]
virt_type=qemu
然后重启service nova-compute restart，现在nova-compute就up了。
3、创建虚拟机失败： 错误： 创建实例 "vm001" 失败: 请稍后再试 [错误: Virtual Interface creation failed].
修改controller节点的/etc/neutron/neutron.conf
nova_url = http://10.1.101.11:8774/v2/v2为nova_url = http://10.1.101.11:8774/v2
因为我部署时用命令sed -i -e s/# nova_url = http:\/\/127.0.0.1:8774/nova_url = http:\/\/$MASTER:8774\/v2/g /etc/neutron/neutron.conf
导致的，没有好好检查。
4、创建虚拟机失败：Error: 创建实例 "vmtest" 失败: 请稍后再试 [错误: Timed out waiting for a reply to message ID c13fc53762ca47ce8e5253e5afb753c8].
应该是nova服务挂掉了
root@sc-ctrl01:~# nova-manage service list
Binary Host Zone Status State Updated_At
nova-cert sc-ctrl01 internal enabled :-) 2015-03-17 05:30:01
nova-consoleauth sc-ctrl01 internal enabled :-) 2015-03-17 05:30:01
nova-scheduler sc-ctrl01 internal enabled :-) 2015-03-17 05:30:00
nova-conductor sc-ctrl01 internal enabled :-) 2015-03-17 05:29:59
nova-compute sc-com01 nova enabled XXX 2015-03-17 05:18:37
重启nova-compute服务
5、Authorization Failed: [Errno 111] Connection refused
可能是环境变量设置错误
租户不存在
OS_AUTH_URL写错
6、ERROR 2006 (HY000) at line 1: MySQL server has gone away
客户机和服务器之间的连接断开了，可能是因为sql操作时间过长，或者传输数据太大（例如使用insert...value语句过长，这种情况将/etc/mysql/my.cf中的max_allowed_packet修改为64M或更大，也可以在程序中将数据分批插入）
7、start: Rejected send message, 1 matched rules; type="method_call", sender=":1.6" (uid=1001 pid=2153 comm="start mysql ") interface
="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1
comm="/sbin/init")
需要root权限才行
sudo -i到root，然后再执行之前的命令。