mysql,Mysqldump,Mysqladmin,php连接mysql服务常会提示下面错误：
|
|
ERROR
2002
(
HY000
)
:
Can
't connect to local MySQL server through socket '
/
var
/
lib
/
mysql
/
mysql
.
sock'
(
2
)
|
这是由于修改mysql服务的了socket文件mysql.sock位置，而导致无法通过mysql socket文件连接到mysql服务引起的，具体解决办法如下：
1、查看mysql服务的socket文件位置：
mysql socket文件的位置是在/etc/my.cnf中设置的，cat /etc/my.cnf内容如下：
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|
[
mysqld
]
datadir
=
/
storage
/
db
/
mysql
socket
=
/
storage
/
db
/
mysql
/
mysql
.
sock
user
=
mysql
|
其中socket等于的路径就是socket文件的位置，我们只要修改my.cnf文件,告诉mysql,mysqldump,mysqladmin mysql服务的socket位置在哪里就可以。
2、修改my.cnf文件：
在/etc/my.cnf文件中添加如下内容，并重启mysqls服务，即可解决mysql,mysqldump,mysqladmin的“Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'”问题：
1
2
3
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5
6
7
8
9
10
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12
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[
mysqld
]
datadir
=
/
storage
/
db
/
mysql
socket
=
/
storage
/
db
/
mysql
/
mysql
.
sock
[
mysql
]
socket
=
/
storage
/
db
/
mysql
/
mysql
.
sock
[
mysqldump
]
socket
=
/
storage
/
db
/
mysql
/
mysql
.
sock
[
mysqladmin
]
socket
=
/
storage
/
db
/
mysql
/
mysql
.
sock
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3、php连接mysql服务提示"Can't connect to local MySQL server through socket..."的解决方法
有时候mysql服务正常运行,用户名密码也完全正确，使用php的mysql_connect函数却连接不了mysql，调用php的mysql_error()函数提示“Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'”，这是我们需要修改/etc/php.ini文件。
在/etc/php.ini文件中"[MySQL]"项下找到"mysql.default_socket"，并设置其值指向正确的mysql服务socket文件即可，如:
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[
MySQL
]
.
.
.省略
n行
.
.
.
mysql
.
default_socket
=
"/storage/db/mysql/mysql.sock"
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4、python连接mysql提示"Can't connect to local MySQL server through socket..."的解决方法:
在连接mysql数据库函数中指定socket文件，如下：
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#!/usr/bin/python
from
MySQLdb
import
connect
conn
=
connect
(
db
=
"pzy"
,
user
=
"root"
,
host
=
"localhost"
,
unix_socket
=
"/storage/db/mysql/mysql.sock"
)
cur
=
conn
.
cursor
(
)
count
=
cur
.
execute
(
"show databases"
)
print
'there has %s dbs'
%
count
conn
.
commit
(
)
conn
.
close
(
)
|
5. php pdo连接mysql提示"Can't connect to local MySQL server through socket..."的解决方法:
同样在连接字符串添加mysql socket文件的位置即可，如下:
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<?php
$dsn
=
"mysql:host=localhost;dbname=pzy;unix_socket=/storage/db/mysql/mysql.sock"
;
$db
=
new
PDO
(
$dsn
,
'root'
,
''
)
;
$rs
=
$db
->
query
(
"SELECT * FROM qrtest"
)
;
while
(
$row
=
$rs
->
fetch
(
)
)
{
print_r
(
$row
)
;
}
?>
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