penstack環境搭建程度（安裝完keystone）
然后運行 openstack domain create --description "An Example Domain" example
出現報錯 An unexpected error prevented the server from fulfilling your request. (HTTP 500) (Request-ID: req-5e6811f3-0671-4615-88aa-00f35b1e9258)
解決方法一： vim /etc/keystone/keystone.conf
connection = mysql://keystone:redhat@controller/keystone
去掉原先的 connection = mysql+pymysql://keystone:redhat@localhost/keystone
然后按照官方指導從下面的命令開始重新操作一遍
su -s /bin/sh -c "keystone-manage db_sync" keystone
解決方法二： 數據庫中授權 grant all privileges on keystone.* to 'keystone'@'controller' identified by 'redhat';
然后按照官方指導從下面的命令開始重新操作一遍
su -s /bin/sh -c "keystone-manage db_sync" keyst