An unexpected error prevented the server?400报错

用centos7 安装openstack中，按照官网的安装文档，安装到创建项目、用户和角色，验证操作。

#openstack --os-auth-url http://controller:35357/v3 --os-project-domain-id default --os-user-domain-id default --os-project-name admin --os-username admin --os-auth-type password token issue

报错：An unexpected error prevented the server from fulfilling your request. (HTTP 500) (Request-ID: req-b8677765-ed60-44c6-9954-a769acf84b35)

cat /var/log/keystone/keystone.log

2017-03-28 17:49:43.459 3567 INFO keystone.common.wsgi [req-faa4be8f-f254-44e7-a83b-640824fb9ea9 - - - - -] GET http://controller:35357/v3/
2017-03-28 17:49:43.496 3568 INFO keystone.common.wsgi [req-92fbe2b6-dcad-4396-90c5-a41dd92dcde8 - - - - -] POST http://controller:35357/v3/auth/tokens
2017-03-28 17:49:43.678 3568 INFO keystone.common.kvs.core [req-92fbe2b6-dcad-4396-90c5-a41dd92dcde8 - - - - -] Using default dogpile sha1_mangle_key as KVS region token-driver key_mangler
2017-03-28 17:49:49.715 3568 WARNING keystone.common.wsgi [req-92fbe2b6-dcad-4396-90c5-a41dd92dcde8 - - - - -] An unexpected error prevented the server from fulfilling your request.