OpenStack专题：Discovering versions from the identity service failed when creating the password plugin

当执行如下Identity组件验证代码：
openstack –os-auth-url http://:5000/v3 –os-project-domain-name default –os-user-domain-name default –os-project-name demo –os-username demo token issue
出现如下的错误提示：
Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.

解决方法：
1) 是否已经执行过admin-openrc，若没有，执行：
# . admin-openrc
2) 检查是否export了HTTP Proxy，如果有，则先退出当前用户，然后重新登录。