创建glance用户报错Failed to discover available identity versions when contacting http://:5000/v3. Attempti

这里我们就要检查全局环境变量了
查看创建的admin-openrc.sh文件
发现*$HOST_NAME没有写

[root@controller ~]# cat admin-openrc.sh 
export OS_PROJECT_DOMAIN_NAME=demo
export OS_USER_DOMAIN_NAME=demo
export OS_PROJECT_NAME=admin
export OS_USERNAME=admin
export OS_PASSWORD=000000
**export OS_AUTH_URL=http://**$HOST_NAME**:5000/v3**
export OS_IDENTITY_API_VERSION=3
export OS_IMAGE_API_VERSION=2

改为controller，这里需要填写主机名

[root@controller ~]# cat admin-openrc.sh 
export OS_PROJECT_DOMAIN_NAME=demo
export OS_USER_DOMAIN_NAME=demo
export OS_PROJECT_NAME=admin
export OS_USERNAME=admin
export OS_PASSWORD=000000
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
export OS_IMAGE_API_VERSION=2

问题都是粗心和初学者容易犯的错误，得多加细心

在source一下使变量生效，在去创建用户成功！！

[root@controller ~]# source admin-openrc.sh 
[root@controller ~]# openstack user create --domain demo --password 000000 glance
+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| domain_id           | 7c0d6c92b2d64972a91e5fb925442c43 |
| enabled             | True                             |
| id                  | 79b2a63d86294a54b810d932d4f6258b |
| name                | glance                           |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+