今天安装openstack folsom版本，安装完mysql，为各个服务增加对应的数据库和用户后，发现

无法使用新增的用户登陆mysql。我增加用户的方法如下：

mysql -uroot -p$MYSQL_PASS <<EOF

CREATE DATABASE nova;

GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' IDENTIFIED BY '$MYSQL_PASS';

CREATE DATABASE glance;

GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY '$MYSQL_PASS';

CREATE DATABASE keystone;

GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'%'IDENTIFIED BY '$MYSQL_PASS';

CREATE DATABASE cinder;

GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'%'IDENTIFIED BY '$MYSQL_PASS';

CREATE DATABASE quantum;

GRANT ALL PRIVILEGES ON quantum.* TO 'quantum'@'%'IDENTIFIED BY '$MYSQL_PASS';

FLUSH PRIVILEGES;

EOF

但使用用户登陆失败：

root@controller:~# mysql -h localhost -ukeystone -ppassword

ERROR 1045 (28000): Access denied for user 'keystone'@'localhost' (using password: YES)

解决方法：

增加普通用户后，执行：

mysql> use mysql

mysql> delete from user where user='';

mysql> flush privileges;

意思是删除匿名用户。

OK，搞定，enjoy！