导读： 本文主要介绍 CentOS 系统二进制安装 MySQL 5.7.23 版本的安装步骤，其他版本安装过程相似。

1.前置准备

  • 卸载旧版MySQL
    • 查看rpm包rpm -qa|grep mysql 若有可用rpm -e卸载
    • 查找mysql残留包，有则删除，没有则忽略find / -name mysql
  • 安装相关依赖yum -y install make gcc-c++ cmake bison-devel ncurses-devel numactl libaio
  • 创建用户和用户组groupadd mysql useradd -s /sbin/nologin -g mysql -M mysql

2.下载二进制安装包并解压

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cd /usr/local/
# wget下载或者本地下载后上传
wget https://downloads.mysql.com/archives/get/file/mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz
# 解压安装包
tar -zxvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz
# 解压后为了方便后面操作可把解压后文件名修改为mysql
mv mysql-5.7.23-linux-glibc2.12-x86_64 mysql
# 更改文件夹所属
chown -R mysql.mysql /usr/local/mysql/

3.创建mysql相关目录

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mkdir -p /data/mysql/{data,logs,tmp}
# 更改文件夹所属
chown -R mysql.mysql /data/mysql/

4.创建mysql配置文件my.cnf

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vi /etc/my.cnf
# 简单模板如下：
[client] port = 3306 socket = /data/mysql/tmp/mysql.sock [mysqld] user = mysql basedir = /usr/local/mysql datadir = /data/mysql/data port = 3306 socket = /data/mysql/tmp/mysql.sock pid-file = /data/mysql/tmp/mysqld.pid tmpdir = /data/mysql/tmp skip_name_resolve = 1 symbolic-links=0 max_connections = 2000 group_concat_max_len = 1024000 sql_mode = NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION lower_case_table_names = 1 log_timestamps=SYSTEM character-set-server = utf8 interactive_timeout = 1800 wait_timeout = 1800 max_allowed_packet = 32M binlog_cache_size = 4M sort_buffer_size = 2M read_buffer_size = 4M join_buffer_size = 4M tmp_table_size = 96M max_heap_table_size = 96M max_length_for_sort_data = 8096 #logs server-id = 1003306 log-error = /data/mysql/logs/error.log slow_query_log = 1 slow_query_log_file = /data/mysql/logs/slow.log long_query_time = 3 log-bin = /data/mysql/logs/binlog binlog_format = row expire_logs_days = 15 log_bin_trust_function_creators = 1 relay-log = /data/mysql/logs/relay-bin relay-log-recovery = 1 relay_log_purge = 1 #innodb innodb_file_per_table = 1 innodb_log_buffer_size = 16M innodb_log_file_size = 256M innodb_log_files_in_group = 2 innodb_io_capacity = 2000 innodb_io_capacity_max = 4000 innodb_flush_neighbors = 0 innodb_flush_method = O_DIRECT innodb_autoinc_lock_mode = 2 innodb_read_io_threads = 8 innodb_write_io_threads = 8 innodb_buffer_pool_size = 2G

5.配置mysql.server

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cd /usr/local/mysql/support-files
cp mysql.server /etc/init.d/mysql
vi /etc/init.d/mysql
# 修改目录位置
basedir=/usr/local/mysql
datadir=/data/mysql/data

# 注册开机启动服务
chkconfig --add mysql
chkconfig --list

6.添加环境变量

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echo "PATH=$PATH:/usr/local/mysql/bin  " >> /etc/profile  
source /etc/profile

7.初始化mysql

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/usr/local/mysql/bin/mysqld  --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql/data
# 临时密码保存在errlog中 
# 获取临时密码
more /data/mysql/logs/error.log |grep password

8.启动mysql服务 并修改密码

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# 启动mysql服务
service mysql start
# 使用初始密码登录mysql服务 并修改密码
mysql -uroot -p
alter user 'root'@'localhost' identified by 'root';
flush privileges;