在 Ubuntu 16.04 上重新安装 MySQL 5.7 服务器的问题

Question

我的服务器在 Ubuntu 16.04 上运行 我的 MySQL 配置有一些问题，所以我决定清理并重新安装 MySQL 服务器。

在这个命令之后：

sudo apt-get install mysql-server

这是我在过程结束时得到的：

update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Renaming removed key_buffer and myisam-recover options (if present)
Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
Setting up libhtml-tagset-perl (3.20-2) ...
Setting up liburi-perl (1.71-1) ...
Setting up libhtml-parser-perl (3.72-1) ...
Setting up libcgi-pm-perl (4.26-1) ...
Setting up libfcgi-perl (0.77-1build1) ...
Setting up libcgi-fast-perl (1:2.10-1) ...
Setting up libencode-locale-perl (1.05-1) ...
Setting up libhtml-template-perl (2.95-2) ...
Setting up libtimedate-perl (2.3000-2) ...
Setting up libhttp-date-perl (6.02-1) ...
Setting up libio-html-perl (1.001-1) ...
Setting up liblwp-mediatypes-perl (6.02-1) ...
Setting up libhttp-message-perl (6.11-1) ...
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Processing triggers for libc-bin (2.23-0ubuntu5) ...
Processing triggers for systemd (229-4ubuntu13) ...
Processing triggers for ureadahead (0.100.0-19) ...
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

我尝试启动 MySQL 并运行systemctl status mysql.service给出了这个：

● mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: activating (start-post) (Result: exit-code) since Tue 2016-12-20 17:33:32 BDT; 14s ago
  Process: 22634 ExecStart=/usr/sbin/mysqld (code=exited, status=1/FAILURE)
  Process: 22631 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 22634 (code=exited, status=1/FAILURE);         : 22635 (mysql-systemd-s)
    Tasks: 2
   Memory: 1.5M
      CPU: 337ms
   CGroup: /system.slice/mysql.service
           └─control
             ├─22635 /bin/bash /usr/share/mysql/mysql-systemd-start post
             └─22669 sleep 1

当我尝试使用mysql -u root -p连接数据库时

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

Answer 1

我今天遇到同样的问题，最后我发现这是因为在 my.cnf 中有类似的东西：

log_slow_queries   = /var/log/mysql/mysql-slow.log

但是在 Mysql 5.7 中，log_slow_queries 已被弃用，改为

slow_query_log_file = /var/log/mysql/mysql-slow.log

解决了我的问题。

Answer 2

确保没有其他 mysql 进程正在运行。 我有一个死的 mysql 进程正在运行，这导致了冲突/升级错误。

ps -aux | grep 3306 ps -aux | grep 3306如果有任何“死”的 mysql 进程，像这样杀死它们`sudo kill -15 {pid here}。

然后再次运行升级。

干杯 Unkn0wn0x

Answer 3

您可能想尝试从源代码安装，以便您可以尝试查明究竟是什么导致了问题。

首先使用以下命令删除所有部分安装的 mysql 包：

$ sudo apt-get remove --purge mysql\*

然后按照本指南：

https://dev.mysql.com/doc/refman/5.7/en/source-installation.html

或者，您可以安装 MariaDB，它是 mysql 的替代品：

$ sudo apt-get install mariadb-server

我已经开始在 Ubuntu 上使用 MariaDB 而不是 MySQL，它对我来说效果很好。