运行环境：centos+mysql8.0.12
1.下载官方打包好的二进制安装包：
https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.30-el7-x86_64.tar.gz
1.mysql下载地址:
https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.14-el7-x86_64.tar.gz
https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.16-el7-x86_64.tar.gz
https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.17-el7-x86_64.tar.gz
#wget https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.12-linux-glibc2.12-x86_64.tar.xz
可以看到这个版本采用了tar.xz的打包压缩方式，文件只有350M左右，下载还是满方便的。
# du -sh mysql-8.0.12-linux-glibc2.12-x86_64.tar.xz
339M mysql-8.0.12-linux-glibc2.12-x86_64.tar.xz
2.解压文件：
#tar -xJvf mysql-8.0.12-linux-glibc2.12-x86_64.tar.xz -C /usr/local/
# mv /usr/local/mysql-8.0.12-linux-glibc2.12-x86_64/ /usr/local/mysql
3.配置参数文件：
# cat > /etc/my.cnf << EOF
[mysqld]
server-id = 1
port = 3306
mysqlx_port = 33060
mysqlx_socket = /tmp/mysqlx.sock
datadir = /data/mysql
basedir = /usr/local/mysql
socket = /tmp/mysql.sock
pid-file = /tmp/mysqld.pid
log-error = error.log
slow-query-log = 1
slow-query-log-file = slow.log
long_query_time = 0.2
log-bin = bin.log
relay-log = relay.log
binlog_format =ROW
relay_log_recovery = 1
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect ='SET NAMES utf8mb4'
innodb_buffer_pool_size = 1G
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
log_timestamps = SYSTEM
lower_case_table_names = 1
default-authentication-plugin =mysql_native_password
EOF
4.创建目录授权等：
# useradd mysql
# mkdir -p /data/mysql
# chown -R mysql:mysql /data/mysql/
# chmod -R 775 /data/mysql/
5.初始化数据库：
#/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql --initialize-insecure
官方推荐使用--initialize，会在错误日志中生成难以输入的临时密码，我这里使用的免密码的方式。
# cat /data/mysql/error.log | grep -i password
2018-07-29T02:06:41.253856+08:00 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: wquR3-Kxlg1d
6.设置启动文件和环境变量：
#cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
--启动数据库：
# /etc/init.d/mysql start
Starting MySQL.Logging to '/data/mysql/error.log'.
SUCCESS!
# vim /etc/profile.d/mysql.sh
# cat /etc/profile.d/mysql.sh
export PATH=$PATH:/usr/local/mysql/bin
# source /etc/profile.d/mysql.sh
# mysqld --version
mysqld Ver 8.0.12 for linux-glibc2.12 on x86_64 (MySQL Community Server - GPL)
[root@node4 mysql]# /usr/local/mysql/bin/mysql -p -S /tmp/mysql.sock
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 7
Server version: 8.0.12 MySQL Community Server - GPL
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.12 |
+-----------+
1 row in set (0.00 sec)
使用前先修改root密码
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '1';
7.设置可以远程登录的账号：
mysql> show variables like '%valid%pass%';
Empty set (0.00 sec)
mysql> create user root@'%' identified by 'oracle';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> show variables like '%valid%pass%';
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> alter user root@'localhost' identified by 'oracle';
Query OK, 0 rows affected (0.07 sec)
mysql> show variables like '%valid%pass%';
Empty set (0.01 sec)
--创建可以远程登录的用户：
mysql> create user root@'%' identified by 'oracle';
Query OK, 0 rows affected (0.06 sec)
mysql> grant all privileges on *.* to root@'%' with grant option;
Query OK, 0 rows affected (0.07 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)