<![CDATA[向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除]]> http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// <![CDATA[[实践OK]mysql启用skip-name-resolve模式时出现Warning的处理办法]]> jack <xdy108@126.com> Wed, 01 Oct 2014 02:19:04 +0000 http://www.jackxiang.com/post//


[root@jackxiang mysql]# vi my.cnf
skip-name-resolve
# 禁止MySQL对外部连接进行DNS解析，使用这一选项可以消除MySQL进行DNS解析的时间。但需要注意，如果开启该选项，
# 则所有远程主机连接授权都要使用IP地址方式，否则MySQL将无法正常处理连接请求

实践如下：



重启mysql，发现日志还有:



1）按提示作下查询，果然有一个空账户和root帐户的Host是jackxiang：
select * from user where Host="jackxiang"\G;

mysql> select Host,User,Password from user where Host="jackxiang";
+-----------+------+-----------------------------------------------------+
| Host          | User  | Password                              |
+-----------+------+-----------------------------------------------------+
| jackxiang  |           |                                                                            |
| jackxiang |root      | *2CD42BDFDF0EB0E*Z****3458EB72EE1F17F26F |
+-----------+------+------------------------------------------------------+


2）查下localhost，因为大都是限定本机连接，不让外面机器连接，确保安全：
mysql> select Host,User,Password from user where Host="localhost" limit 2;
+-----------+-----------------+-------------------------------------------+
| Host      | User                     | Password                                               |
+-----------+-----------------+-------------------------------------------+
| localhost |                           |                                                               |
| localhost | jack_mysql          | *2CD42BDFDF0E***3458EB72EE1F17F26F |
+-----------+-----------------+-------------------------------------------+
3）把Host既是 jackxiang的，用户是空或root的Host修改为localhost：
mysql> update user set Host="localhost" where Host="jackxiang";
ERROR 1062 (23000): Duplicate entry 'localhost-' for key 'PRIMARY'
这样搞不行，得一个一个干掉，看有没有root同名的，查下：
mysql> select Host,User,Password from user where User="";
+-----------+------+----------+
| Host      | User | Password |
+-----------+------+----------+
| localhost |            |               |
| jackxiang |            |               |
+-----------+------+----------+

mysql> delete from user where  User="" and Password="";
Query OK, 2 rows affected (0.01 sec)

4)查下user为root的
mysql> select Host,User,Password from user where User="root";                                      
+-----------+------+-------------------------------------------+
| Host      | User | Password                                  |
+-----------+------+-------------------------------------------+
| localhost | root | *2CD42BDFDF0EB0E1A7777777777EE1F17F26F |
| jackxiang | root | *2CD42BDFDF0EB0E1A7777777777EE1F17F26F |
| 127.0.0.1 | root | *2CD42BDFDF0EB0E1A7777777777EE1F17F26F |
| ::1       | root | *2CD42BDFDF0EB0E1A7777777777EE1F17F26F |
+-----------+------+-------------------------------------------+

5)留下localhost就足够了，其余删除掉：
mysql> delete from user where Host !="localhost" and User="root";
Query OK, 3 rows affected (0.00 sec)

6)restart mysql:


日志warning还有一个：
[Warning] 'proxies_priv' entry '@ root@jackxiang' ignored in --skip-name-resolve mode.
解决办法：
然后删除表mysql.proxies_priv中和cvs类似与具体域名有关的行,方法同上。
mysql> select Host,User,Proxied_host,Proxied_user,With_grant,Grantor,Timestamp from proxies_priv ;
+-----------+------+--------------+--------------+------------+---------+----------------+
| Host      | User | Proxied_host | Proxied_user | With_grant | Grantor | Timestamp           |
+-----------+------+--------------+--------------+------------+---------+----------------+
| localhost | root |              |              |                              1 |         | 2014-07-14 13:26:08 |
| jackxiang | root |              |              |                              1 |         | 2014-07-14 13:26:08 |
+-----------+------+--------------+--------------+------------+---------+----------------+

mysql> delete from proxies_priv where Host="jackxiang";
Query OK, 1 row affected (0.02 sec)
这下彻底清静了。


原来是当时安装mysql后，多次grant授权引起的,。

备注：
  skip-name-resolve是禁用dns解析，避免网络DNS解析服务引发访问MYSQL的错误，一般应当启用。   启用后，在mysql的授权表中就不能使用主机名了，只能使用IP ，出现此警告是由于mysql 表中已经存在有 root@jackxiang 帐号信息。     我们把它删除就好了。   mysql>use mysql; mysql> delete  from user where HOST='localhost.localdomain'; Query OK, 2 rows affected (0.00 sec)   重启MYSQL ，发现警告已经没有啦。

来自：http://www.dedecms.com/knowledge/data-base/mysql/2012/0819/7084.html
http://blog.itpub.net/14184018/viewspace-1061224/ ]]> http://www.jackxiang.com/post//#blogcomment <![CDATA[[评论] [实践OK]mysql启用skip-name-resolve模式时出现Warning的处理办法]]> <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment