[英]OperationalError: (2002, "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)")
[英]Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (error 2002)
我知道这是一个经常被问到的问题,但是我似乎无法从其他主题中找到任何解决方案。
我尝试过的
chown mysql:mysql /var/lib/mysql
在某些时候,似乎我没有套接字文件,
sudo find / -type s | grep mysqld.sock
sudo find / -type s | grep mysqld.sock
没有给出任何结果。
编辑
我现在输入mysql_config --socket
,似乎现在在/var/run/mysqld/mysqld.sock
处有一个套接字文件。
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)
在所有这些/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
我签出了/var/log/error.log
,当我尝试# /etc/init.d/mysql start
,从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
有人能帮我解决问题而又不丢失数据库的问题吗
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)
它不是一开始就没有启动,因此没有套接字文件。 您从内部/核心mysql
数据库中丢失了数据,这是一个非常糟糕的信号。
如果尚未初始化数据目录,现在是在启动mysqld
之前对其进行初始化的时候了。
您可以运行mysql提供的这两个脚本之一。 在您的shell提示符下,将它们运行为:
# mysql_secure_installation
要么
# mysql_install_db --user=mysql \
--basedir=<path to mysql install dir> \
--datadir=/var/lib/mysql/data
mysql_install_db
将使用--bootstrap
和--skip-grant-tables
选项调用mysqld
。
mysql_install_db
cmd可以解决问题。 我又有了一个套接字,现在可以再次登录mysql了。
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