CentOS7.4 源码安装MySQL8.0（理论7.X都可以安装）
CentOS7.4 源码安装MySQL8.0MySQL 8 正式版 8.0.11 已发布，官方表示 MySQL 8 要比 MySQL 5.7 快 2 倍，还带来了大量的改进和更快的性能！
以下为本人2018.4.23日安装过程的记录。整个过程大概需要一个小时，make && make install过程需要的时间较长。
一.环境
CentOS7.4 64位最小化安装
二.准备工作
1.安装依赖
yum -y install wgetcmake gcc gcc-c++ ncursesncurses-devellibaio-developenssl openssl-devel
2.下载源码包
wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-boost-8.0.11.tar.gz (此版本带有boost)
3.创建mysql用户
groupadd mysql
useradd -r -g mysql -s /bin/false mysql
4.创建安装目录和数据目录
mkdir -p /usr/local/mysql
mkdir -p /data/mysql
三.安装MySQL8.0.11
1.解压源码包
tar -zxf mysql-boost-8.0.11.tar.gz -C /usr/local
2.编译&安装
cd /usr/local/mysql-8.0.11
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/usr/local/mysql/data -DSYSCONFDIR=/etc -DMYSQL_TCP_PORT=3306 -DWITH_BOOST=/usr/local/mysql-8.0.11/boost
make&& make install
3.配置my.cnf文件
cat /etc/my.cnf
server-id=1
port=3306
max_connections=3000
basedir=/usr/local/mysql
datadir=/data/mysql
#datadir=/var/lib/mysql
#socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
#symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd
#log-error=/var/log/mariadb/mariadb.log
#pid-file=/var/run/mariadb/mariadb.pid
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d
##请根据实际情况添加参数
4.目录权限修改
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /data/mysql
chmod 755 /usr/local/mysql -R
chmod 755 /data/mysql -R
5.初始化，进入/usr/local/mysql 目录后执行：
bin/mysqld --initialize --user=mysql --datadir=/data/mysql/
bin/mysql_ssl_rsa_setup
6.启动mysql
bin/mysqld_safe --user=mysql &
7.修改账号密码
bin/mysql-uroot -p
mysql> alter user 'root'@'localhost' identified by "123456";
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
##添加远程账号
mysql> create user root@'%' identified by '123456';
Query OK, 0 rows affected (0.08 sec)
mysql> grant all privileges on *.* to root@'%';
Query OK, 0 rows affected (0.04 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
8.创建软链接
ln -s /usr/local/mysql/bin/* /usr/local/bin/
mysql -h 127.0.0.1 -P 3306 -uroot -p123456 -e "select version();"
mysql: Using a password on the command line interface can be insecure.
+-----------+
| version() |
+-----------+
| 8.0.11 |
+-----------+
9.添加到启动
cp support-files/mysql.server /etc/init.d/mysql.server
到此配置已经完成，但远程连接数据库时，发现会出现错误：1251- Client does not support authentication protocol
原因：mysql8 之前的版本中加密规则是mysql_native_password,而在mysql8之后,加密规则是caching_sha2_password
解决办法：
1.升级navicat驱动；（暂时无相关资料，可能要钱，不推荐）
2.把mysql用户登录密码加密规则还原成mysql_native_password.
2.1.打开命令行小黑屏，进入MySQL的bin目录，然后输入mysql -u root -p，输入密码
2.2.然后依次输入
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; #修改加密规则 （必写）
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456'; #更新用户密码
ALTER USER 'root'@'%' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; #修改加密规则 （必写）
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456'; #更新用户密码
FLUSH PRIVILEGES; #刷新权限（不输入也可以） '123456' :为root用户密码
2.3.输入刚刚修改的密码，再次测试连接，搞定
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