无法通过套接字 '/var/run/mysqld/mysqld.sock' (2) 连接到本地 MySQL 服务器(错误 2002)
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【中文标题】无法通过套接字 \'/var/run/mysqld/mysqld.sock\' (2) 连接到本地 MySQL 服务器(错误 2002)【英文标题】:Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (error 2002)无法通过套接字 '/var/run/mysqld/mysqld.sock' (2) 连接到本地 MySQL 服务器(错误 2002) 【发布时间】:2015-08-11 14:59:58 【问题描述】:我知道这是一个多次被问到的问题,但我似乎无法从其他主题中找到任何解决方案。
我尝试过的:
重新安装 mysql-server(所以不是客户端)chown mysql:mysql /var/lib/mysql
检查了 my.cnf,一切似乎都正确
将绑定地址更改为本地主机
在某个时候,我似乎没有套接字文件,并且
sudo find / -type s | grep mysqld.sock
没有给出任何结果。
编辑
我现在输入了mysql_config --socket
,现在/var/run/mysqld/mysqld.sock
似乎有一个套接字文件
还检查了apparmor_status
,结果如下:
apparmor module is loaded.
14 profiles are loaded.
14 profiles are in enforce mode.
/sbin/dhclient
/usr/bin/evince
/usr/bin/evince-previewer
/usr/bin/evince-previewer//sanitized_helper
/usr/bin/evince-thumbnailer
/usr/bin/evince-thumbnailer//sanitized_helper
/usr/bin/evince//sanitized_helper
/usr/lib/NetworkManager/nm-dhcp-client.action
/usr/lib/connman/scripts/dhclient-script
/usr/lib/cups/backend/cups-pdf
/usr/sbin/cups-browsed
/usr/sbin/cupsd
/usr/sbin/mysqld
/usr/sbin/tcpdump
0 profiles are in complain mode.
3 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
3 processes are unconfined but have a profile defined.
/sbin/dhclient (1089)
/usr/sbin/cups-browsed (1415)
/usr/sbin/cupsd (16608)
毕竟/etc/init.d/mysql start
仍然失败
my.cnf 中的设置
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
我检查了/var/log/error.log
,当我尝试# /etc/init.d/mysql start
时,日志中显示以下报告:
150528 22:58:19 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
150528 22:58:19 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
150528 22:58:19 [Note] /usr/sbin/mysqld (mysqld 5.5.43-0ubuntu0.14.04.1) starting as process 14608 ...
150528 22:58:19 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
150528 22:58:19 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
150528 22:58:19 [Note] Plugin 'FEDERATED' is disabled.
/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
150528 22:58:19 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
150528 22:58:19 InnoDB: The InnoDB memory heap is disabled
150528 22:58:19 InnoDB: Mutexes and rw_locks use GCC atomic builtins
150528 22:58:19 InnoDB: Compressed tables use zlib 1.2.8
150528 22:58:19 InnoDB: Using Linux native AIO
150528 22:58:19 InnoDB: Initializing buffer pool, size = 128.0M
150528 22:58:19 InnoDB: Completed initialization of buffer pool
150528 22:58:19 InnoDB: highest supported file format is Barracuda.
150528 22:58:19 InnoDB: Waiting for the background threads to start
150528 22:58:20 InnoDB: 5.5.43 started; log sequence number 140421610
150528 22:58:20 [Note] Server hostname (bind-address): 'localhost'; port: 3306
150528 22:58:20 [Note] - 'localhost' resolves to '127.0.0.1';
150528 22:58:20 [Note] Server socket created on IP: '127.0.0.1'.
150528 22:58:20 [ERROR] /usr/sbin/mysqld: Can't find file: './mysql/host.frm' (errno: 13)
150528 22:58:20 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/host.frm' (errno: 13)
150528 22:58:20 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
有人可以帮我解决如何在不丢失数据库的情况下修复它
【问题讨论】:
您是否使用目录/mysql/data/dir
作为数据目录?您是否也相应地更新了您的my.cnf
文件?默认情况下,MySQL 将查找/var/lib/mysql
。
我看到你使用的是 Ubuntu,所以还要检查 apparmor
是否处于 MySQL 的强制模式(命令是 apparmor_status
)。
目录是一种格式,它的真实位置确实是/var/lib/mysql
您需要通过运行mysql_install_db
或mysql_secure_installation
来初始化mysql 数据目录。然后就可以开始mysqld
了。
当我运行 mysql_secure_installation
时,我需要输入 root 密码,然后它给出了同样的错误 --> 没有套接字文件。所以我运行mysql_install_db
并按照cmd 的建议进行操作,所以我能够输入mysql 并且show tables
也可以工作,但是从这些表中选择会出现以下错误ERROR 1017 (HY000): Can't find file: './mysql/user.frm' (errno: 13)
【参考方案1】:
mysql_install_db
cmd 成功了。我又有了一个套接字,我现在可以再次登录到 mysql。谢谢
【讨论】:
【参考方案2】:如果你还没有初始化数据目录,现在是时候在启动mysqld
之前初始化它了。
您可以运行 mysql 提供的这两个脚本中的任何一个。在你的 shell 提示符下运行它们:
# mysql_secure_installation
或
# mysql_install_db --user=mysql \
--basedir=<path to mysql install dir> \
--datadir=/var/lib/mysql/data
mysql_install_db
将调用带有--bootstrap
和--skip-grant-tables
选项的mysqld
。
【讨论】:
现在看来我毕竟没有套接字文件。虽然当我运行mysql_config --socket
时它说它在那里,但是当我检查文件夹时,里面什么都没有。所以错误保持不变【参考方案3】:
您的 mysql 安装已完成:
150528 22:58:20 [ERROR] /usr/sbin/mysqld: Can't find file: './mysql/host.frm' (errno: 13)
它一开始就没有启动,因此没有套接字文件。您缺少内部/核心 mysql
数据库中的数据,这是一个非常糟糕的信号。
【讨论】:
我不相信他的安装是水管。我认为他没有初始化数据目录。以上是关于无法通过套接字 '/var/run/mysqld/mysqld.sock' (2) 连接到本地 MySQL 服务器(错误 2002)的主要内容,如果未能解决你的问题,请参考以下文章
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