openstack-centos7系统安装ocata版本，创建实例时报401错误

计算节点：
tail -f /var/log/nova/compute.log
2017-11-03 11:38:31.878 9748 ERROR nova.compute.manager [req-8125a915-1137-4dfe-91d1-33a7e3332f6a 8a19a07251864ea79ec9e21c5ded1737 40a3463da5d744dd90868e2436d2da94 - - -] [instance: 7815ea57-84e1-454f-80f2-5833f4847dbe] Instance failed to spawn: Unauthorized: The request you have made requires authentication. (HTTP 401) (Request-ID: req-87f5b0ef-f7e6-4d3a-b8f3-8531f77390af)
2017-11-03 11:38:31.878 9748 ERROR nova.compute.manager [instance: 7815ea57-84e1-454f-80f2-5833f4847dbe] Traceback (most recent call last):
2017-11-03 11:38:31.878 9748 ERROR nova.compute.manager [instance: 7815ea57-84e1-454f-80f2-5833f4847dbe]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2128, in _build_resources
。。。。。

控制节点：
tail -f /var/log/nova/conductor.log
NoValidHost: No valid host was found. There are not enough hosts available.

从上面错误看，存在两个问题
1.Nova的keystone认证有问题
检测下/etc/nova/nova.conf"内'[keystone_authtoken]'的'password
2.可能资源不足，是否创建过实例。

感谢您的回答！
以下是控制节点和计算节点的配置，配置都是一样的。
/etc/nova/nova.conf
控制节点：
[keystone_authtoken]
#...
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = nova
password = openstack

计算节点：
[keystone_authtoken]
#...
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = nova
password = openstack

这是第一次创建实例，按照官网ocata安装，之前所有操作都正常，就是到这一步出了问题

非常感谢你的回答，是计算节点的password = openstack   错了，我拼写成opesntack  ，现在401的问题解决了！！！
[neutron]
#...
url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = Default
user_domain_name = Default
region_name = RegionOne
project_name = service
username = neutron
password = openstack